TPS7A4533DCQT
TPS7A45xx Low-Noise Fast-Transient-Response 1.5-A Low-Dropout Voltage Regulators
Manufacturer
Texas Instruments
Overview
Part: TPS7A45xx from Texas Instruments
Type: Low-Dropout Voltage Regulator
Key Specs:
- Output Current: 1.5 A
- High Output Voltage Accuracy: 1% at 25°C
- Dropout Voltage: 300 mV
- Low Noise: 35 µVRMS (10 Hz to 100 kHz)
- High Ripple Rejection: 68 dB at 1 kHz
- Quiescent Current: 1 mA (operating), less than 1 µA (shutdown)
- Adjustable Output Voltage Range: 1.21 V to 20 V
- Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
- Stable With 10-µF Ceramic Output Capacitor
Features:
- Optimized for Fast Transient Response
- Controlled Quiescent Current in Dropout
- No Protection Diodes Needed
- Reverse-Battery Protection
- Reverse Current Protection
- Current Limiting
- Thermal Limiting
Applications:
- Industrial
- Wireless Infrastructure
- Radio-Frequency Systems
- Sensitive RF supply applications
Package:
- SOT-223 (6): 6.50 mm × 7.06 mm
- TO-263 (5): 10.16 mm × 15.24 mm
Features
Tools & Software
The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The • Output Current: 1.5 A device can supply 1.5 A of output current with a • High Output Voltage Accuracy: 1% at 25°C dropout voltage of 300 mV. Operating quiescent • Dropout Voltage: 300 mV current is 1 mA, dropping to less than 1 μA in shutdown. Quiescent current is well controlled; it does • Low Noise: 35 μVRMS (10 Hz to 100 kHz) not rise in dropout as with many other regulators. In • High Ripple Rejection: 68 dB at 1 kHz addition to fast transient response, the TPS7A45xx • 1-mA Quiescent Current regulators have very-low output noise, which makes them ideal for sensitive RF supply applications. • No Protection Diodes Needed
Support & Community
• Controlled Quiescent Current in Dropout Output voltage range is from 1.21 to 20 V. The TPS7A45xx regulators are stable with output • Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V capacitance as low as 10 μF. Small ceramic • Adjustable Output from 1.21 V to 20 V capacitors can be used without the necessary (TPS7A4501 Only) addition of ESR as is common with other regulators. • Less Than 1-μA Quiescent Current in Shutdown Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and • Stable With 10-μF Ceramic Output Capacitor reverse-current protection. The devices are available • Reverse-Battery Protection in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V, • Reverse Current Protection and as an adjustable device with a 1.21-V reference voltage.
Applications
• Industrial
1
- Wireless Infrastructure
- • Radio-Frequency Systems TPS7A45xx
Pin Configuration
Pin Functions
| NO. | NAME | DESCRIPTION |
|---|---|---|
| 1 | SHDN | Shutdown. SHDN is used to put the TPS7A45xx regulators into a low-power shutdown state. The output is off when SHDN is pulled low. SHDN can be driven by 5-V logic, 3-V logic or open-collector logic with a pullup resistor. The pullup resistor is required to supply the pullup current of the open-collector gate, normally several microamperes, and SHDN current, typically 3 µA. If unused, SHDN must be connected to VIN. The device is in the low-power shutdown state if SHDN is not connected. |
| 2 | IN | Input. Power is supplied to the device through IN. A bypass capacitor is required on this pin if the device is more than six inches away from the main input filter capacitor. In general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. A bypass capacitor (ceramic) in the range of 1 µF to 10 µF is sufficient. The TPS7A45xx regulators are designed to withstand reverse voltages on IN with respect to ground and on OUT. In the case of a reverse input, which can happen if a battery is plugged in backwards, the device acts as if there is a diode in series with its input. There is no reverse current flow into the regulator, and no reverse voltage appears at the load. The device protects both itself and the load. |
| 3 | GND | Ground. For the KTT package, the exposed thermal pad is connected to GND and must be soldered to the PCB for rated thermal performance. |
| 4 | OUT | Output. The output supplies power to the load. A minimum output capacitor (ceramic) of 10 µF is required to prevent oscillations. Larger output capacitors are required for applications with large transient loads to limit peak voltage transients. |
| 5 | ADJ | Adjust. For the adjustable version only (TPS7A4501), this is the input to the error amplifier. ADJ is internally clamped to ±7 V. It has a bias current of 3 µA that flows into the pin. ADJ voltage is 1.21 V referenced to ground, and the output voltage range is 1.21 V to 20 V. |
| 5 | SENSE | Sense. For fixed-voltage versions (TPS7A4515, TPS7A4518, TPS7A4525, and TPS7A4533), SENSE is the input to the error amplifier. Optimum regulation is obtained at the point where SENSE is connected to the OUT pin of the regulator. In critical applications, small voltage drops are caused by the resistance (RE) of PCB traces and the load. These may be eliminated by connecting SENSE to the output at the load as shown in Figure 32. Note that the voltage drop across the external PCB traces adds to the dropout voltage of the regulator. SENSE bias current is 600 µA at the rated output voltage. SENSE can be pulled below ground (as in a dual supply system in which the regulator load is returned to a negative supply) and still allow the device to start and operate. |
| 6 | GND | Ground. DCQ package only. |
SLVS720F –JUNE 2008–REVISED NOVEMBER 2015 www.ti.com
Electrical Characteristics
Over recommended operating temperature range TJ = –40 to 125°C (unless otherwise noted) (1)
| PARAMETER | TEST CONDITIONS | TJ | MIN | TYP (2) | MAX | UNIT | ||
|---|---|---|---|---|---|---|---|---|
| Minimum input voltage (3) (4) | ILOAD = 0.5 A | 25°C | 1.9 | |||||
| VIN | ILOAD = 1.5 A | Full range | 2.1 | 2.5 | V | |||
| VIN = 2.21 V, ILOAD = 1 mA | 25°C | 1.485 | 1.5 | 1.515 | ||||
| TPS7A4515 | VIN = 2.5 V to 20 V, ILOAD = 1 mA to 1.5 A | Full range | 1.447 | 1.5 | 1.545 | |||
| VIN = 2.3 V, ILOAD = 1 mA | 25°C | 1.782 | 1.8 | 1.818 | ||||
| Regulated output voltage (5) | TPS7A4518 | VIN = 2.8 V to 20 V, ILOAD = 1 mA to 1.5 A | Full range | 1.737 | 1.8 | 1.854 | ||
| VOUT | VIN = 3 V, ILOAD = 1 mA | 25°C | 2.475 | 2.5 | 2.525 | V | ||
| TPS7A4525 | VIN = 3.5 V to 20 V, ILOAD = 1 mA to 1.5 A | Full range | 2.412 | 2.5 | 2.575 | |||
| TPS7A4533 | VIN = 3.8 V, ILOAD = 1 mA | 25°C | 3.266 VIN = 4.3 V to 20 V, ILOAD = 1 mA to 1.5 A | 3.3 Full range | 3.333 3.2 | 3.3 | ||
| VIN = 2.21 V, ILOAD = 1 mA | 25°C | 1.197 | 1.21 | 1.222 | ||||
| VADJ | ADJ pin voltage (3) (5) | TPS7A4501 | V IN = 2.5 V to 20 V, ILOAD = 1 mA to 1.5 A | Full range | 1.174 | 1.21 | 1.246 | V |
| Line regulation | TPS7A4515 | ΔVIN = 2.21 V to 20 V, ILOAD = 1 mA | Full range | 2 | 6 | |||
| TPS7A4518 | ΔVIN = 2.3 V to 20 V, ILOAD = 1 mA | Full range | 2.5 | 7 | ||||
| TPS7A4525 | ΔVIN = 3 V to 20 V, ILOAD = 1 mA | Full range | 3 | 10 | mV | |||
| TPS7A4533 | ΔVIN = 3.8 V to 20 V, ILOAD = 1 mA | Full range | 3.5 | 10 | ||||
| TPS7A4501 (3) | ΔVIN = 2.21 V to 20 V, ILOAD = 1 mA | Full range | 1.5 | 3 |
(2) Typical values represent the likely parametric nominal values determined at the time of characterization. Typical values depend on the application and configuration and may vary over time. Typical values are not ensured on production material.
- (3) The TPS7A4501 is tested and specified for these conditions with the ADJ pin connected to the OUT pin.
- (4) For the TPS7A4501, TPS7A4515 and TPS7A4518, dropout voltages are limited by the minimum input voltage specification under some output voltage/load conditions.
- (5) Operating conditions are limited by maximum junction temperature. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current, the input voltage range must be limited.
Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 5
TPS7A4501, TPS7A4515, TPS7A4518, TPS7A4525, TPS7A4533
SLVS720F –JUNE 2008–REVISED NOVEMBER 2015 www.ti.com
Absolute Maximum Ratings
over operating virtual-junction temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| IN | –20 | 20 | ||
| OUT | –20 | 20 | ||
| Input-to-output differential (2) | –20 | 20 | ||
| Input voltage, VIN | SENSE | –20 | 20 | V |
| ADJ | –7 | 7 | ||
| SHDN | –20 | 20 | ||
| Output short-circuit duration, tshort | Indefinite | |||
| Maximum lead temperature (10-s soldering time), Tlead | 300 | °C | ||
| Maximum junction temperature, TJMAX | 150 | °C | ||
| Storage temperature, Tstg | –65 | 150 | °C |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to conditions beyond the recommended operating maximum for extended periods may affect device reliability.
(2) Absolute maximum input-to-output differential voltage cannot be achieved with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 20 V, the OUT pin may not be pulled below 0 V. The total measured voltage from IN to OUT can not exceed ±20 V.
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V_IN | Input voltage range(1) | V_OUT + V_DO | 20 | V |
| V_IH | SHDN high-level input voltage | 2 | 20 | V |
| V_IL | SHDN low-level input voltage | 0.25 | V | |
| T_J | Recommended operating junction temperature range | –40 | 125 | °C |
(1) TPS7A4501, TPS7A4515, and TPS7A4518 may require a higher minimum input voltage under some output voltage/load conditions as indicated under Electrical Characteristics.
www.ti.com SLVS720F –JUNE 2008–REVISED NOVEMBER 2015
Thermal Information
| THERMAL METRIC (1) (2) | TPS7A45xx | |||
|---|---|---|---|---|
| KTT (TO-263) | DCQ (SOT-223) | UNIT | ||
| 5 PINS | 6 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 28.0 | 50.5 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 43.0 | 31.1 | °C/W |
| RθJB | Junction-to-board thermal resistance | 17. |
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
(2) For thermal estimates of this device based on PCB copper area, see the TI PCB Thermal Calculator.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS7A4533 | Texas Instruments | — |
| TPS7A4533DCQR | Texas Instruments | — |
| TPS7A4533KTTR | Texas Instruments | — |
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