NCP1117ST33T3G
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Manufacturer
onsemi
Overview
Part: onsemi NCP1117, NCP1117I, NCV1117
Type: Low-Dropout Positive Fixed and Adjustable Voltage Regulators
Key Specs:
- Output Current: In excess of 1.0 A
- Maximum Dropout Voltage: 1.2 V at 800 mA over temperature
- Fixed Output Voltages: 1.5 V, 1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, 12 V
- Adjustable Output Voltage Range: 1.25 V to 18.8 V
- Reference/Output Voltage Accuracy: ±1.0%
- Input Voltage: Up to 20 V
- Maximum Die Junction Temperature Range: -55 to 150 °C
- Operating Ambient Temperature Range (NCP1117): 0 to +125 °C
- Operating Ambient Temperature Range (NCP1117I, NCV1117): -40 to +125 °C
Features:
- Output Current in Excess of 1.0 A
- 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
- Fixed Output Voltages of 1.5 V, 1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V
- Adjustable Output Voltage Option
- No Minimum Load Requirement for Fixed Voltage Output Devices
- Reference/Output Voltage Trimmed to ±1.0%
- Current Limit, Safe Operating and Thermal Shutdown Protection
- Operation to 20 V Input
- NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
- These are Pb-Free Devices
Applications:
- Consumer and Industrial Equipment Point of Regulation
- Active SCSI Termination for 2.85 V Version
- Switching Power Supply Post Regulation
- Hard Drive Controllers
- Battery Chargers
Package:
- SOT-223 (Case 318H): dimensions not specified
- DPAK (Case 369A): dimensions not specified
Features
- Output Current in Excess of 1.0 A
- 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
- Fixed Output Voltages of 1.5 V, 1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V
- Adjustable Output Voltage Option
- No Minimum Load Requirement for Fixed Voltage Output Devices
- Reference/Output Voltage Trimmed to ±1.0%
- Current Limit, Safe Operating and Thermal Shutdown Protection
- Operation to 20 V Input
- NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
- These are Pb-Free Devices
Applications
- Consumer and Industrial Equipment Point of Regulation
- Active SCSI Termination for 2.85 V Version
- Switching Power Supply Post Regulation
- Hard Drive Controllers
- Battery Chargers
DPAK DT SUFFIX CASE 369C
PIN CONFIGURATION
(Top View)
Pin: 1. Adjust/Ground 2. Output 3. Input
Heatsink tab is connected to Pin 2.
Pin Configuration
(Top View)
Pin: 1. Adjust/Ground 2. Output 3. Input
Heatsink tab is connected to Pin 2.
Electrical Characteristics
(Cin = 10 -F, Cout = 10 -F, for typical value TA = 25°C, for min and max values TA is the operating ambient temperature range that applies unless otherwise noted.) (Note 4)
| Characteristic | Min | Typ | Max | Unit | |
|---|---|---|---|---|---|
| Reference Voltage, Adjustable Output Devices (Vin–Vout = 2.0 V, Iout = 10 mA, TA = 25°C) (Vin–Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA) (Note 4) | 1.238 1.225 | 1.25 - | 1.262 1.270 | V | |
| Output Voltage, Fixed Output Devices 1.5 V (Vin = 3.5 V, Iout = 10 mA, TA = 25 °C) (Vin = 2.9 V to 11.5 V, Iout = 0 mA to 800 mA) (Note 4) | Vout | 1.485 1.470 | 1.500 - | 1.515 1.530 | V |
| 1.8 V (Vin = 3.8 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.2 V to 11.8 V, Iout = 0 mA to 800 mA) (Note 4) | 1.782 1.755 | 1.800 - | 1.818 1.845 | ||
| 1.9 V (Vin = 3.9 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.3 V to 11.9 V, Iout = 0 mA to 800 mA) (Note 4) | 1.872 1.862 | 1.900 1.900 | 1.929 1.938 | ||
| 2.0 V (Vin = 4.0 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.4 V to 12 V, Iout = 0 mA to 800 mA) (Note 4) | 1.970 1.960 | 2.000 - | 2.030 2.040 | ||
| 2.5 V (Vin = 4.5 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.9 V to 10 V, Iout = 0 mA to 800 mA,) (Note 4) | 2.475 2.450 | 2.500 - | 2.525 2.550 | ||
| 2.85 V (Vin = 4.85 V, Iout = 10 mA, TA = 25 °C) (Vin = 4.25 V to 10 V, Iout = 0 mA to 800 mA) (Note 4) (Vin = 4.0 V, Iout = 0 mA to 500 mA) (Note 4) | 2.821 2.790 2.790 | 2.850 - - | 2.879 2.910 2.910 | ||
| 3.3 V (Vin = 5.3 V, Iout = 10 mA, TA = 25 °C) (Vin = 4.75 V to 10 V, Iout = 0 mA to 800 mA) (Note 4) | 3.267 3.235 | 3.300 - | 3.333 3.365 | ||
| 5.0 V (Vin = 7.0 V, Iout = 10 mA, TA = 25 °C) (Vin = 6.5 V to 12 V, Iout = 0 mA to 800 mA) (Note 4) | 4.950 4.900 | 5.000 - | 5.050 5.100 | ||
| 12 V (Vin = 14 V, Iout = 10 mA, TA = 25 °C) (Vin = 13.5 V to 20 V, Iout = 0 mA to 800 mA) (Note 4) | 11.880 11.760 | 12.000 - | 12.120 12.240 | ||
| Line Regulation (Note 5) Adjustable (Vin = 2.75 V to 16.25 V, Iout = 10 mA) | Regline | - | 0.04 | 0.1 | % |
| 1.5 V (Vin = 2.9 V to 11.5 V, Iout = 0 mA) 1.8 V (Vin = 3.2 V to 11.8 V, Iout = 0 mA) 1.9 V (Vin = 3.3 V to 11.9 V, Iout = 0 mA) 2.0 V (Vin = 3.4 V to 12 V, Iout = 0 mA) 2.5 V (Vin = 3.9 V to 10 V, Iout = 0 mA) 2.85 V (Vin = 4.25 V to 10 V, Iout = 0 mA) 3.3 V (Vin = 4.75 V to 15 V, Iout = 0 mA) 5.0 V (Vin = 6.5 V to 15 V, Iout = 0 mA) 12 V (Vin = 13.5 V to 20 V, Iout = 0 mA) | - - - - - - - - - | 0.3 0.4 0.5 0.5 0.5 0.8 0.8 0.9 1.0 | 1.0 1.0 2.5 2.5 2.5 3.0 4.5 6.0 7.5 | mV | |
| Load Regulation (Note 5) Adjustable (Iout = 10 mA to 800 mA, Vin = 4.25 V) | Regline | - | 0.2 | 0.4 | % |
| 1.5 V (Iout = 0 mA to 800 mA, Vin = 2.9 V) 1.8 V (Iout = 0 mA to 800 mA, Vin = 3.2 V) 1.9 V (Iout = 0 mA to 800 mA, Vin = 3.3 V) 2.0 V (Iout = 0 mA to 800 mA, Vin = 3.4 V) 2.5 V (Iout = 0 mA to 800 mA, Vin = 3.9 V) 2.85 V (Iout = 0 mA to 800 mA, Vin = 4.25 V) 3.3 V (Iout = 0 mA to 800 mA, Vin = 4.75 V) 5.0 V (Iout = 0 mA to 800 mA, Vin = 6.5 V) 12 V (Iout = 0 mA to 800 mA, Vin = 13.5 V) | - - - - - - - - - | 2.3 2.6 2.7 3.0 3.3 3.8 4.3 6.7 16 | 5.5 6.0 6.0 6.0 7.5 8.0 10 15 28 | mV | |
| Dropout Voltage (Measured at Vout - 100 mV) (Iout = 100 mA) (Iout = 500 mA) (Iout = 800 mA) | Vin-Vout | - - - | 0.95 1.01 1.07 | 1.10 1.15 1.20 | V |
| Output Current Limit (Vin-Vout = 5.0 V, TA = 25°C, Note 6) | 1000 | 1500 | 2200 | mA | |
| Minimum Required Load Current for Regulation, Adjustable Output Devices (Vin = 15 V) | Iout IL(min) | - | 0.8 | 5.0 | mA |
Absolute Maximum Ratings
| Rating | Symbol | Value | Unit |
|---|---|---|---|
| Input Voltage (Note 1) | Vin | 20 | V |
| Output Short Circuit Duration (Notes 2 and 3) | - | Infinite | - |
| Power Dissipation and Thermal Characteristics Case 318H (SOT-223) Power Dissipation (Note 2) Thermal Resistance, Junction-to-Ambient, Minimum Size Pad Thermal Resistance, Junction-to-Case Case 369A (DPAK) Power Dissipation (Note 2) Thermal Resistance, Junction-to-Ambient, Minimum Size Pad Thermal Resistance, Junction-to-Case | PD RJA RJC PD RJA RJC | Internally Limited 160 15 Internally Limited 67 6.0 | W °C/W °C/W W °C/W °C/W |
| Maximum Die Junction Temperature Range | TJ | -55 to 150 | °C |
| Storage Temperature Range | Tstg | -65 to 150 | °C |
| Operating Ambient Temperature Range NCP1117 NCP1117I NCV1117 | TA | 0 to +125 -40 to +125 -40 to +125 | °C |
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.
- This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM), Class 2, 2000 V Machine Model (MM), Class B, 200 V
Charge Device Model (CDM), Class IV, 2000 V.
- Internal thermal shutdown protection limits the die temperature to approximately 175°C. Proper heatsinking is required to prevent activation. The maximum package power dissipation is: PD -TJ(max) TA
$frac{вaтoв}{вaтoв}3. The regulator output current must not exceed 1.0 A with Vin greater than 12 V.
ELECTRICAL CHARACTERISTICS
(Cin = 10 -F, Cout = 10 -F, for typical value TA = 25°C, for min and max values TA is the operating ambient temperature range that applies unless otherwise noted.) (Note 4)
| Characteristic | Min | Typ | Max | Unit | |
|---|---|---|---|---|---|
| Reference Voltage, Adjustable Output Devices (Vin–Vout = 2.0 V, Iout = 10 mA, TA = 25°C) (Vin–Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA) (Note 4) | 1.238 1.225 | 1.25 - | 1.262 1.270 | V | |
| Output Voltage, Fixed Output Devices 1.5 V (Vin = 3.5 V, Iout = 10 mA, TA = 25 °C) (Vin = 2.9 V to 11.5 V, Iout = 0 mA to 800 mA) (Note 4) | Vout | 1.485 1.470 | 1.500 - | 1.515 1.530 | V |
| 1.8 V (Vin = 3.8 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.2 V to 11.8 V, Iout = 0 mA to 800 mA) (Note 4) | 1.782 1.755 | 1.800 - | 1.818 1.845 | ||
| 1.9 V (Vin = 3.9 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.3 V to 11.9 V, Iout = 0 mA to 800 mA) (Note 4) | 1.872 1.862 | 1.900 1.900 | 1.929 1.938 | ||
| 2.0 V (Vin = 4.0 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.4 V to 12 V, Iout = 0 mA to 800 mA) (Note 4) | 1.970 1.960 | 2.000 - | 2.030 2.040 | ||
| 2.5 V (Vin = 4.5 V, Iout = 10 mA, TA = 25 °C) (Vin = 3.9 V to 10 V, Iout = 0 mA to 800 mA,) (Note 4) | 2.475 2.450 | 2.500 - | 2.525 2.550 | ||
| 2.85 V (Vin = 4.85 V, Iout = 10 mA, TA = 25 °C) (Vin = 4.25 V to 10 V, Iout = 0 mA to 800 mA) (Note 4) (Vin = 4.0 V, Iout = 0 mA to 500 mA) (Note 4) | 2.821 2.790 2.790 | 2.850 - - | 2.879 2.910 2.910 | ||
| 3.3 V (Vin = 5.3 V, Iout = 10 mA, TA = 25 °C) (Vin = 4.75 V to 10 V, Iout = 0 mA to 800 mA) (Note 4) | 3.267 3.235 | 3.300 - | 3.333 3.365 | ||
| 5.0 V (Vin = 7.0 V, Iout = 10 mA, TA = 25 °C) (Vin = 6.5 V to 12 V, Iout = 0 mA to 800 mA) (Note 4) | 4.950 4.900 | 5.000 - | 5.050 5.100 | ||
| 12 V (Vin = 14 V, Iout = 10 mA, TA = 25 °C) (Vin = 13.5 V to 20 V, Iout = 0 mA to 800 mA) (Note 4) | 11.880 11.760 | 12.000 - | 12.120 12.240 | ||
| Line Regulation (Note 5) Adjustable (Vin = 2.75 V to 16.25 V, Iout = 10 mA) | Regline | - | 0.04 | 0.1 | % |
| 1.5 V (Vin = 2.9 V to 11.5 V, Iout = 0 mA) 1.8 V (Vin = 3.2 V to 11.8 V, Iout = 0 mA) 1.9 V (Vin = 3.3 V to 11.9 V, Iout = 0 mA) 2.0 V (Vin = 3.4 V to 12 V, Iout = 0 mA) 2.5 V (Vin = 3.9 V to 10 V, Iout = 0 mA) 2.85 V (Vin = 4.25 V to 10 V, Iout = 0 mA) 3.3 V (Vin = 4.75 V to 15 V, Iout = 0 mA) 5.0 V (Vin = 6.5 V to 15 V, Iout = 0 mA) 12 V (Vin = 13.5 V to 20 V, Iout = 0 mA) | - - - - - - - - - | 0.3 0.4 0.5 0.5 0.5 0.8 0.8 0.9 1.0 | 1.0 1.0 2.5 2.5 2.5 3.0 4.5 6.0 7.5 | mV | |
| Load Regulation (Note 5) Adjustable (Iout = 10 mA to 800 mA, Vin = 4.25 V) | Regline | - | 0.2 | 0.4 | % |
| 1.5 V (Iout = 0 mA to 800 mA, Vin = 2.9 V) 1.8 V (Iout = 0 mA to 800 mA, Vin = 3.2 V) 1.9 V (Iout = 0 mA to 800 mA, Vin = 3.3 V) 2.0 V (Iout = 0 mA to 800 mA, Vin = 3.4 V) 2.5 V (Iout = 0 mA to 800 mA, Vin = 3.9 V) 2.85 V (Iout = 0 mA to 800 mA, Vin = 4.25 V) 3.3 V (Iout = 0 mA to 800 mA, Vin = 4.75 V) 5.0 V (Iout = 0 mA to 800 mA, Vin = 6.5 V) 12 V (Iout = 0 mA to 800 mA, Vin = 13.5 V) | - - - - - - - - - | 2.3 2.6 2.7 3.0 3.3 3.8 4.3 6.7 16 | 5.5 6.0 6.0 6.0 7.5 8.0 10 15 28 | mV | |
| Dropout Voltage (Measured at Vout - 100 mV) (Iout = 100 mA) (Iout = 500 mA) (Iout = 800 mA) | Vin-Vout | - - - | 0.95 1.01 1.07 | 1.10 1.15 1.20 | V |
| Output Current Limit (Vin-Vout = 5.0 V, TA = 25°C, Note 6) | 1000 | 1500 | 2200 | mA | |
| Minimum Required Load Current for Regulation, Adjustable Output Devices (Vin = 15 V) | Iout IL(min) | - | 0.8 | 5.0 | mA |
ELECTRICAL CHARACTERISTICS (continued)
(Cin = 10 -F, Cout = 10 -F, for typical value TA = 25°C, for min and max values TA is the operating ambient temperature range that applies unless otherwise noted.) (Note 4)
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Quiescent Current 1.5 V (Vin = 11.5 V) 1.8 V (Vin = 11.8 V) 1.9 V (Vin = 11.9 V) 2.0 V (Vin = 12 V) 2.5 V (Vin = 10 V) 2.85 V (Vin = 10 V) 3.3 V (Vin = 15 V) 5.0 V (Vin = 15 V) 12 V (Vin = 20 V) | IQ | - - - - - - - - - | 3.6 4.2 4.3 4.5 5.2 5.5 6.0 6.0 6.0 | 10 10 10 10 10 10 10 10 10 | mA |
| Thermal Regulation (TA = 25°C, 30 ms Pulse) | - | 0.01 | 0.1 | %/W | |
| Ripple Rejection (Vin-Vout = 6.4 V, Iout = 500 mA, 10 Vpp 120 Hz Sinewave) Adjustable 1.5 V 1.8 V 1.9 V 2.0 V 2.5 V 2.85 V 3.3 V 5.0 V 12 V | RR | 67 66 66 66 64 62 62 60 57 50 | 73 72 70 72 70 68 68 64 61 54 | - - - - - - - - - - | dB |
| Adjustment Pin Current (Vin = 11.25 V, Iout = 800 mA) | Iadj | - | 52 | 120 | µA |
| Adjust Pin Current Change (Vin-Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA) | ΔIadj | - | 0.4 | 5.0 | µA |
| Temperature Stability | ST | - | 0.5 | - | % |
| Long Term Stability (TA = 25°C, 1000 Hrs End Point Measurement) | SLT | - | 0.3 | - | % |
| RMS Output Noise (f = 10 Hz to 10 kHz) | N | - | 0.003 | - | %Vout |
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.
- NCP1117: Tlow = 0°C, Thigh = 125°C NCP1117I: Tlow = -40°C, Thigh = 125°C
NCV1117: Tlow = -40°C, Thigh = 125°C
-
Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
-
The regulator output current must not exceed 1.0 A with Vin greater than 12 V.
FREQUENCY (Hz)
Figure 14. Output Spectral Noise Density vs. Frequency, Vout = 1V5
Figure 21. SOT-223 Thermal Resistance and Maximum Power Dissipation vs. P.C.B. Copper Length
Figure 22. DPAK Thermal Resistance and Maximum Power Dissipation vs. P.C.B. Copper Length
APPLICATIONS INFORMATION
Introduction
The NCP1117 features a significant reduction in dropout voltage along with enhanced output voltage accuracy and temperature stability when compared to older industry standard three-terminal adjustable regulators. These devices contain output current limiting, safe operating area compensation and thermal shutdown protection making them designer friendly for powering numerous consumer and industrial products. The NCP1117 series is pin compatible with the older LM317 and its derivative device types.
Output Voltage
The typical application circuits for the fixed and adjustable output regulators are shown in Figures 23 and 24. The adjustable devices are floating voltage regulators. They develop and maintain the nominal 1.25 V reference voltage between the output and adjust pins. The reference voltage is programmed to a constant current source by resistor R1, and this current flows through R2 to ground to set the output voltage. The programmed current level is usually selected to be greater than the specified 5.0 mA minimum that is required for regulation. Since the adjust pin current, Iadj, is significantly lower and constant with respect to the programmed load current, it generates a small output voltage error that can usually be ignored. For the fixed output devices R1 and R2 are included within the device and the ground current Ignd, ranges from 3.0 mA to 5.0 mA depending upon the output voltage.
External Capacitors
Input bypass capacitor Cin may be required for regulator stability if the device is located more than a few inches from the power source. This capacitor will reduce the circuit's sensitivity when powered from a complex source impedance and significantly enhance the output transient response. The input bypass capacitor should be mounted with the shortest possible track length directly across the regulator's input and ground terminals. A 10 -F ceramic or tantalum capacitor should be adequate for most applications.
Figure 23. Fixed Output Regulator
Frequency compensation for the regulator is provided by capacitor Cout and its use is mandatory to ensure output stability. A minimum capacitance value of 4.7 -F with an equivalent series resistance (ESR) that is within the limits of 33 m (typ) to 2.2 is required. See Figures 12 and 13. The capacitor type can be ceramic, tantalum, or aluminum electrolytic as long as it meets the minimum capacitance value and ESR limits over the circuit's entire operating temperature range. Higher values of output capacitance can be used to enhance loop stability and transient response with the additional benefit of reducing output noise.
Figure 24. Adjustable Output Regulator
The output ripple will increase linearly for fixed and adjustable devices as the ratio of output voltage to the reference voltage increases. For example, with a 12 V regulator, the output ripple will increase by 12 V/1.25 V or 9.6 and the ripple rejection will decrease by 20 log of this ratio or 19.6 dB. The loss of ripple rejection can be restored to the values shown with the addition of bypass capacitor Cadj, shown in Figure 24. The reactance of Cadj at the ripple frequency must be less than the resistance of R1. The value of R1 can be selected to provide the minimum required load current to maintain regulation and is usually in the range of 100 to 200 .mathbf{Cadj} > frac{1}{2 π біpple R1}$
The minimum required capacitance can be calculated from the above formula. When using the device in an application that is powered from the AC line via a transformer and a full wave bridge, the value for Cadj is:
$mathsf{tfipple} = mathsf{120} mathsf{Hz}, mathsf{R1} = mathsf{120} mathsf{Q}, mathsf{then} mathsf{Cmathsf{add}} > mathsf{11.1} mathsf{μF}The value for Cadj is significantly reduced in applications where the input ripple frequency is high. If used as a post regulator in a switching converter under the following conditions:
fripple - 50 kHz, R1 - 120 , then Cadj 0.027 -F
Figures 10 and 11 shows the level of ripple rejection that is obtainable with the adjust pin properly bypassed.
Protection Diodes
The NCP1117 family has two internal low impedance diode paths that normally do not require protection when used in the typical regulator applications. The first path connects between Vout and Vin, and it can withstand a peak surge current of about 15 A. Normal cycling of Vin cannot generate a current surge of this magnitude. Only when Vin is shorted or crowbarred to ground and Cout is greater than 50 -F, it becomes possible for device damage to occur. Under these conditions, diode D1 is required to protect the device. The second path connects between Cadj and Vout, and it can withstand a peak surge current of about 150 mA. Protection diode D2 is required if the output is shorted or crowbarred to ground and Cadj is greater than 1.0 -F.
Figure 25. Protection Diode Placement
A combination of protection diodes D1 and D2 may be required in the event that Vin is shorted to ground and Cadj is greater than 50 -F. The peak current capability stated for the internal diodes are for a time of 100 s with a junction temperature of 25°C. These values may vary and are to be used as a general guide.
Load Regulation
The NCP1117 series is capable of providing excellent load regulation; but since these are three terminal devices, only partial remote load sensing is possible. There are two conditions that must be met to achieve the maximum available load regulation performance. The first is that the top side of programming resistor R1 should be connected as close to the regulator case as practicable. This will minimize the voltage drop caused by wiring resistance RW + from appearing in series with reference voltage that is across R1. The second condition is that the ground end of R2 should be connected directly to the load. This allows true Kelvin sensing where the regulator compensates for the voltage drop caused by wiring resistance RW -.
Figure 26. Load Sensing
Thermal Considerations
This series contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature is exceeded. When activated, typically at 175°C, the regulator output switches off and then back on as the die cools. As a result, if the device is continuously operated in an overheated condition, the output will appear to be oscillating. This feature provides protection from a catastrophic device failure due to accidental overheating. It is not intended to be used as a substitute for proper heatsinking. The maximum device power dissipation can be calculated by:mathsf{PD} = frac{mathsf{T}mathsf{J}(mathsf{m}mathsf{a}mathsf{s}) - mathsf{T}mathsf{A}}{mathsf{R}mathsf{A}mathsf{T}mathsf{A}}$
The devices are available in surface mount SOT-223 and DPAK packages. Each package has an exposed metal tab that is specifically designed to reduce the junction to air thermal resistance, RJA, by utilizing the printed circuit board copper as a heat dissipater. Figures 21 and 22 show typical RJA values that can be obtained from a square pattern using economical single sided 2.0 ounce copper board material. The final product thermal limits should be tested and quantified in order to insure acceptable performance and reliability. The actual RJA can vary considerably from the graphs shown. This will be due to any changes made in the copper aspect ratio of the final layout, adjacent heat sources, and air flow.
Figure 27. Constant Current Regulator Figure 28. Slow Turn-On Regulator
Vout(Off) -Vref
The 50 resistor that is in series with the ground pin of the upper regulator level shifts its output 300 mV higher than the lower regulator. This keeps the lower regulator off until the input source is removed.
Figure 31. Battery Backed-Up Power Supply Figure 32. Adjusting Output of Fixed
Resistor R2 sets the maximum output voltage. Each transistor reduces the output voltage when turned on.
Figure 29. Regulator with Shutdown Figure 30. Digitally Controlled Regulator
ORDERING INFORMATION - (NCP1117)
| Device | Nominal Output Voltage | Package | Shipping† |
|---|---|---|---|
| NCP1117STAT3G | Adjustable | SOT-223 | |
| NCP1117ST15T3G | 1.5 | (Pb-Free) | 4000 / Tape & Reel |
| NCP1117ST18T3G | 1.8 | ||
| NCP1117ST20T3G | 2.0 | ||
| NCP1117ST25T3G | 2.5 | ||
| NCP1117ST33T3G | 3.3 | ||
| NCP1117ST50T3G | 5.0 | ||
| NCP1117ST12T3G | 12 | ||
| NCP1117DTAG | Adjustable | 75 Units / Rail | |
| NCP1117DTARKG | Adjustable | 2500 / Tape & Reel | |
| NCP1117DTAT5G | Adjustable | 2500 / Tape & Reel | |
| NCP1117DT15G | 1.5 | 75 Units / Rail | |
| NCP1117DT15RKG | 1.5 | 2500 / Tape & Reel | |
| NCP1117DT18G | 1.8 | 75 Units / Rail | |
| NCP1117DT18RKG | 1.8 | 2500 / Tape & Reel | |
| NCP1117DT18T5G | 1.8 | 2500 / Tape & Reel | |
| NCP1117DT19RKG | 1.9 | 2500 / Tape & Reel | |
| NCP1117DT20G | 2.0 | 75 Units / Rail | |
| NCP1117DT20RKG | 2.0 | 2500 / Tape & Reel | |
ORDERING INFORMATION - (NCP1117I)
| Device | Nominal Output Voltage | Package | Shipping† |
|---|---|---|---|
| NCP1117ISTAT3G | Adjustable | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117IST18T3G | 1.8 | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117IST33T3G | 3.3 | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117IST50T3G | 5.0 | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117IDTAT4G | Adjustable | DPAK (Pb-Free) | 2500 / Tape & Reel |
| NCP1117IDT33T4G | 3.3 | DPAK (Pb-Free) | 2500 / Tape & Reel |
| NCP1117IDT50T4G | 5.0 | DPAK (Pb-Free) | 2500 / Tape & Reel |
| Device | Nominal Output Voltage | Package | Shipping† |
|---|---|---|---|
| NCP1117STAT3G | Adjustable | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117ST15T3G | 1.5 | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117ST18T3G | 1.8 | SOT-223 (Pb-Free) | 4000 / Tape & Reel |
| NCP1117 |
ORDERING INFORMATION - (NCV1117)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
*NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
MARKING DIAGRAMS - NCP1117
SOT-223 ST SUFFIX CASE 318H
DPAK DT SUFFIX CASE 369C
117AJG ALYWW 2
1
2
1 2
2
3
2 3
17-18G ALYWW
2
2
MARKING DIAGRAMS - NCP1117I
DPAK DT SUFFIX CASE 369C
| A | = Assembly Location |
|---|---|
| L | = Wafer Lot |
| Y | = Year |
| WW, W = Work Week | |
| ▪ or G | = Pb-Free Package |
(Note: Microdot may be in either location)
MARKING DIAGRAMS - NCV1117
SOT-223 ST SUFFIX CASE 318H
AYW 1725V -
1 2 3
AYW 1750V -
1 2 3
12 V
DPAK DT SUFFIX CASE 369C
- 1
- 3
- Adjustable
Adjustable 1.5 V 1.8 V 2.0 V
2.5 V 3.3 V 5.0 V
2.5 V 3.3 V 5.0 V
1 2 3
AYW 1733V -
1733VG ALYWW
2
1175VG ALYWW
2 3
| A | = Assembly Location |
|---|---|
| L | = Wafer Lot |
| Y | = Year |
| WW, W = Work Week | |
| ▪ or G | = Pb-Free Package |
3 1
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Thermal Information
This series contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature is exceeded. When activated, typically at 175°C, the regulator output switches off and then back on as the die cools. As a result, if the device is continuously operated in an overheated condition, the output will appear to be oscillating. This feature provides protection from a catastrophic device failure due to accidental overheating. It is not intended to be used as a substitute for proper heatsinking. The maximum device power dissipation can be calculated by:mathsf{PD} = frac{mathsf{T}mathsf{J}(mathsf{m}mathsf{a}mathsf{s}) - mathsf{T}mathsf{A}}{mathsf{R}mathsf{A}mathsf{T}mathsf{A}}$
The devices are available in surface mount SOT-223 and DPAK packages. Each package has an exposed metal tab that is specifically designed to reduce the junction to air thermal resistance, RJA, by utilizing the printed circuit board copper as a heat dissipater. Figures 21 and 22 show typical RJA values that can be obtained from a square pattern using economical single sided 2.0 ounce copper board material. The final product thermal limits should be tested and quantified in order to insure acceptable performance and reliability. The actual RJA can vary considerably from the graphs shown. This will be due to any changes made in the copper aspect ratio of the final layout, adjacent heat sources, and air flow.
Figure 27. Constant Current Regulator Figure 28. Slow Turn-On Regulator
Vout(Off) -Vref
The 50 resistor that is in series with the ground pin of the upper regulator level shifts its output 300 mV higher than the lower regulator. This keeps the lower regulator off until the input source is removed.
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