AMS1117-1.8
Product Specification
Manufacturer
EVVO
Overview
Part: AMS1117
Type: 1A Positive Low Dropout Voltage Regulator
Key Specs:
- Low Dropout Voltage: 1.2V @ 1A (Typical)
- Output Accuracy: 1.5% (for fixed versions 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version)
- Output Accuracy: 2% (for fixed version 1.2V)
- Output Current: 1A
- Recommended Input Voltage: 12V
- Operating Junction Temperature Range: -40°C to 125°C
Features:
- 1.5% output accuracy for fixed versions 1.2V,1.5V, 1.8V 2.5V, 3.3V, 5.0V and adjustable version
- Adjustable output voltage
- Low Dropout Voltage: Typical 1.2V@1A
- Current Limiting
- Thermal Shutdown
- Temperature Range: -40C to 125C
Applications:
- Laptop, Palmtop, and Notebook Computers
- Battery Charger
- SCSI-II Active Terminator
- Cellular Phone
- Cordless Telephones
- Battery Powered Systems
- Portable Instrumentation
- SMPS Post-Regulator
Package:
- SOT-223-3L: null
- TO-252-2L: null
- SOT-89-3L: null
Features
- 1.5% output accuracy for fixed versions 1.2V,1.5V, 1.8V 2.5V, 3.3V, 5.0V and adjustable version
- Adjustable output voltage
- Low Dropout Voltage: Typical 1.2V@1A
- Current Limiting
- Thermal Shutdown
- Temperature Range: -40C to 125C
Applications
- Laptop, Palmtop, and Notebook Computers
- Battery Charger
- SCSI-II Active Terminator
- Cellular Phone
- Cordless Telephones
- Battery Powered Systems
- Portable Instrumentation
- SMPS Post-Regulator
NOMENCLATURE
BLOCK DIAGRAM
Pin Configuration
| Pin No. | Pin name | I/O | Functions |
|---|---|---|---|
| 1 | GND/ADJ | /O | Ground/ADJ |
| 2 | VOUT | 0 | Output voltage |
| 3 | VIN | I | Input supply voltage |
Electrical Characteristics
| Characteristics | Symbol | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Reference Voltage | V REF | AMS1117-ADJ, I OUT =10mA, V IN -V OUT =2V, T J =25°C 10mA≤I OUT ≤1A, 1.4V≤V IN -V OUT ≤10V | 1.231 1.225 | 1.250 1.250 | 1.268 1.275 | V |
| Output Voltage | AMS1117-1.2, I OUT =10mA, V IN =3.2V ,T J =25°C 10mA≤I OUT ≤1A, 3.0V≤V IN ≤10V | 1.176 1.152 | 1.2 1.2 | 1.224 1.248 | V | |
| AMS1117-1.5, I OUT =10mA, V IN =3.5V ,T J =25°C 10mA≤I OUT ≤1A, 3.0V≤V IN ≤10V | 1.477 1.470 | 1.500 1.500 | 1.5221 .530 | V | ||
| AMS1117-1.8, IOUT =10mA, VIN =3.8V, TJ =25°C, 0 ≤ IOUT ≤ 1A , 3.2V ≤ VIN ≤ 10V | 1.7731 .746 | 1.800 1.800 | 1.827 1.854 | V | ||
| V OUT | AMS1117-2.5, IOUT =10mA, VIN =4.5V, TJ =25°C , 0 ≤ IOUT ≤ 1A , 3.9V ≤ VIN ≤ 10V | 2.462 2.450 | 2.500 2.500 | 2.538 2.550 | V | |
| AMS1117-3.3, IOUT =10mA, VIN =5V, TJ =25°C, 0 ≤ IOUT ≤ 1A , 4.75V ≤ VIN ≤ 10V | 3.250 3.235 | 3.300 3.300 | 3.349 3.365 | V | ||
| AMS1117-5.0, IOUT =10mA, VIN =7V, TJ =25°C, 0 ≤ IOUT ≤ 1A , 6.5V ≤ VIN ≤ 12V | 4.925 4.900 | 5.000 5.000 | 5.075 5.10 | V | ||
| Output Voltage Temperature Stability | TS OUT | 0.3 | % | |||
| Line Regulation | R line | V INMIN ≤V IN ≤ 12V, V OUT =Fixed/Adj,I OUT =10mA | 9 | 18 | mV | |
| Load Regulation | R load | 10mA≤ IOUT ≤1A, V OUT =Fixed/Adj | 10 | 18 | mV | |
| Dropout Voltage | Vdrop | I OUT =100mA I OUT =500mA I OUT =1A | 1.00 1.05 1.20 | 1.20 1.25 1.30 | V | |
| Quiescent Current | Iq | 4.25V≤V IN ≤ 6.5V | 5 | 10 | mA | |
| Ripple Rejection | P SRR | fRIPPLE =120Hz, (V IN -V OUT )=3V, VRIPPLE =1V PP | 60 | 75 | dB | |
| Adjust pin Current | I adj | 60 | 120 | μΑ | ||
| Adjust pin Current Change | 0≤ I OUT ≤1A, 1.4V ≤V IN -V OUT ≤10V | 0.2 | 5 | μA | ||
| Thermal shutdown | TSD | 150 | °C | |||
| Current limitting | I limit | 2.1 | 2.5 | Α | ||
| Temperature Stabiliy | 0.5 | % | ||||
| Long Term Stability | T A =125°C, 1000Hrs | 0.3 | % |
| Characteristics | Symbol | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| RMS Output Noise | % of V OUT , 10Hz≤f≤10kHz | 0.003 | % |
Absolute Maximum Ratings
| Characteristics | Symbol | Rating | Unit | |
|---|---|---|---|---|
| Input Supply Voltage | V IN | 18 | V | |
| Lead Temperature (Soldering, 5 seconds) | T Lead | 260 | °C | |
| Operating Junction Temperature Range | TJ | 150 | °C | |
| Storage Temperature Range | T stg | -65 ~ + 150 | V | |
| Power Dissipation | P D | Internally Limited (Note1) | mW | |
| Thermal Resistance from Junction to Ambient | SOT-223-3L | 88 | ||
| TO-252-2L | Rja | 86 | °C/W | |
| SOT-89-3L | 102 | |||
| ESD Tolerance (Minimum) | ESD | 2000 | V |
Note1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ (max), the junction to ambient thermal resistance, Rja, and the ambient temperature Tamb . The maximum allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - Tamb) / Rja, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The junction to ambient thermal resistance, θJA of some packages may be different, The value of θJA depends on mounting technique.
Recommended Operating Conditions
| Characteristics | Symbol | Rating | Unit |
|---|---|---|---|
| Input voltage | V IN | 12 | V |
| Operating Junction Temperature Range | TJ | -40 ~ +125 | °C |
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