AMS1117-1.2
Low Dropout RegulatorThe AMS1117-1.2 is a low dropout regulator from EVVO. View the full AMS1117-1.2 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
EVVO
Category
Low Dropout Regulator
Package
SOT-89-3L
Overview
Part: AMS1117
Type: 1A LDO Voltage Regulator
Description: The AMS1117 is a positive low voltage dropout regulator with a typical dropout of 1.2V at 1A, offering fixed output voltages (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V) and an adjustable version, with 1.5% output accuracy for most fixed versions.
Operating Conditions:
- Supply voltage: 3.0–12 V
- Operating temperature: -40 to +125 °C (Junction)
- Max output current: 1 A
Absolute Maximum Ratings:
- Max supply voltage: 18 V
- Max continuous current: 1 A
- Max junction/storage temperature: 150 °C (Junction), -65 to +150 °C (Storage)
Key Specs:
- Reference Voltage (AMS1117-ADJ): Typ 1.250 V (I OUT =10mA, V IN -V OUT =2V, T J =25 °C)
- Dropout Voltage: Typ 1.20 V (I OUT =1A)
- Quiescent Current: Typ 5 mA, Max 10 mA (4.25V≤V IN ≤ 6.5V)
- Line Regulation: Typ 9 mV, Max 18 mV (V INMIN ≤V IN ≤ 12V, I OUT =10mA)
- Load Regulation: Typ 10 mV, Max 18 mV (10mA≤ IOUT ≤1A)
- Ripple Rejection: Typ 75 dB (f RIPPLE =120Hz, (V IN -V OUT )=3V, V RIPPLE =1V PP)
- Current Limiting: Min 2.1 A, Max 2.5 A
- Output Voltage Accuracy: 1.5% (for fixed versions 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version)
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: -40 °C to 125 °C
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:
- TO-252-2L
- SOT-89-3L
- SOT-223-3L
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: -40 C to 125 C
Applications
- Laptop, Palmtop, and Notebook Computers
- Battery Charger
- SCSI-II Active Terminator
- Cellular Phone
- Cordless Telephones
- Battery Powered Systems
- Portable Instrumentation
- SMPS Post-Regulator
Pin Configuration
| Pin No. | Pin name | I/O | Functions |
|---|---|---|---|
| 1 | GND/ADJ | --/O | Ground/ADJ |
| 2 | VOUT | O | 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 |
| AMS1117-1.2, I OUT =10mΑ, 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 =10mΑ, 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 | ||
| V OUT | AMS1117-1.8, I OUT =10mA, V IN =3.8V, T J =25 C , 0≤I OUT ≤1A, 3.2V≤V IN ≤10V | 1.7731 .746 | 1.800 1.800 | 1.827 1.854 | V | |
| Output Voltage | AMS1117-2.5, I OUT =10mA, V IN =4.5V,T J =25 C , 0≤I ≤1A, 3.9V≤V ≤10V | 2.462 2.450 | 2.500 2.500 | 2.538 2.550 | V | |
| OUT IN AMS1117-3.3, I OUT =10mA, V IN =5V,T J =25 C , 0≤I OUT ≤1A, 4.75V≤V IN ≤10V | 3.250 3.235 | 3.300 3.300 | 3.349 3.365 | V | ||
| AMS1117-5.0, I OUT =10mA, V IN =7V, T J =25 C , 0≤ I OUT ≤1A, 6.5V≤V IN ≤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 | V drop | I OUT =100mA I OUT =500mA I OUT =1A | -- | 1.00 1.05 1.20 | 1.20 1.25 1.30 | V |
| Quiescent Current | I q | 4.25V≤V IN ≤ 6.5V | -- | 5 | 10 | mA |
| Ripple Rejection | P SRR | f RIPPLE =120Hz, (V IN -V OUT )=3V, V RIPPLE =1V PP | 60 | 75 | -- | dB |
| Adjust pin Current | I adj | -- | 60 | 120 | A | |
| Adjust pin Current Change | 0≤ I OUT ≤1A, 1.4V ≤V IN -V OUT ≤10V | -- | 0.2 | 5 | A | |
| Thermal shutdown | TSD | -- | 150 | -- | °C | |
| Current limitting | I limit | 2.1 | -- | 2.5 | A | |
| Temperature Stabiliy | -- | 0.5 | -- | % | ||
| Long Term Stability | T A =125°C, 1000Hrs | -- | 0. 3 | -- | % |
Absolute Maximum Ratings
| Characteristics | Characteristics | Symbol | Rating | Unit |
|---|---|---|---|---|
| Input Supply Voltage | Input Supply Voltage | V IN | 18 | V |
| Lead Temperature (Soldering, 5 seconds) | Lead Temperature (Soldering, 5 seconds) | T Lead | 260 | °C |
| Operating Junction Temperature Range | Operating Junction Temperature Range | T J | 150 | °C |
| Storage Temperature Range | Storage Temperature Range | T stg | -65 ~ +150 | V |
| Power Dissipation | Power Dissipation | P D | Internally Limited (Note1) | mW |
| SOT-223-3L | Rja | 88 | °C /W | |
| TO-252-2L | Rja | 86 | °C /W | |
| SOT-89-3L | Rja | 102 | °C /W | |
| ESD Tolerance (Minimum) | 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 | T J | -40 ~ +125 | °C |
Typical Application
Figure 1. Typical Fixed Output Voltage
Figure 2. Typical Adjustable Output Voltage
Note: The circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test.
Package Information
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| AMS1117 | Advanced Monolithic Systems | SOT-223 |
| AMS1117-1.5 | Advanced Monolithic Systems | SOT-223 |
| AMS1117-1.8 | EVVO | SOT-223 |
| AMS1117-2.5 | Advanced Monolithic Systems | SOT-223 |
| AMS1117-3.3 | Advanced Monolithic Systems | SOT-223 |
| AMS1117-5.0 | Advanced Monolithic Systems | SOT-223 |
| AMS1117-ADJ | EVVO | SOT-89-3L |
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