**Source:** [BCD Semiconductor / Diodes Incorporated AP2114 Datasheet](https://www.diodes.com/assets/Datasheets/AP2114.pdf)
**Manufacturer:** Diodes Incorporated (BCD Semiconductor)
**Part Number:** AP2114
**Document:** Rev 2.2, January 2013 (1 A Low Noise CMOS LDO Regulator with Enable)
## Description
The AP2114 is a CMOS process low-dropout linear regulator with enable function. The regulator delivers a guaranteed 1 A (min) continuous load current. The AP2114 is available in 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V regulator output and 0.8 V to 5 V adjustable output. It features excellent output accuracy of ±1.5 %, and it is also available in an excellent load regulation and line regulation performance.
The AP2114 features low power consumption.
Packages: SOT-223, TO-252-2(1) / (3) / (4), TO-263-3, SOIC-8, PSOP-8.
## Key Specifications
| Parameter | Value |
| --- | --- |
| Output Voltage Accuracy | ±1.5 % |
| Output Current | 1 A (min) |
| Foldback Short Circuit Protection | 50 mA |
| Low Dropout Voltage (3.3 V) | 450 mV typ @ IOUT = 1 A |
| Excellent Line Regulation | 0.02 %/V typ, 0.1 %/V max @ IOUT = 30 mA |
| Excellent Load Regulation | 0.25 %/A typ @ IOUT = 1 mA to 1 A |
| Low Quiescent Current | 60 µA (1.2 V/1.5 V/1.8 V/2.5 V/ADJ) typ |
| Low Output Noise | 30 µVRMS |
| PSRR | 68 dB @ 1 kHz (IOUT = 100 mA) |
| OTSD Protection | Yes |
| Operating Temperature Range | −40 °C to +85 °C |
| ESD | MM 400 V, HBM 4000 V |
| Stability | 4.7 µF flexible cap: ceramic, tantalum, aluminum electrolytic |
## Features
- Output voltage accuracy ±1.5 %
- Output current 1 A (min)
- Foldback short-circuit protection 50 mA
- Low dropout voltage 450 mV (typ) @ IOUT = 1 A for 3.3 V version
- Stable with 4.7 µF flexible cap: ceramic, tantalum, aluminum electrolytic
- Excellent line regulation 0.02 % (typ), 0.1 % (max) @ IOUT = 30 mA
- Excellent load regulation 0.25 % (typ) @ IOUT = 1 mA to 1 A
- Low quiescent current 60 µA (1.2 V/1.5 V/1.8 V/2.5 V/ADJ)
- Low output noise 30 µVRMS
- PSRR 68 dB @ freq = 1 kHz (1.2 V/1.5 V/1.8 V/ADJ)
- OTSD protection
- Operating temperature range −40 °C to +85 °C
- ESD: MM 400 V, HBM 4000 V
## Applications
- LCD monitor
- LCD TV
- Set-top box (STB)
## Pin Configuration
Multiple packages available. Top-view mapping:
| Package | Pin 1 | Pin 2 | Pin 3 | Pin 4 (if 4+) | Notes |
| --- | --- | --- | --- | --- | --- |
| H/HA (SOT-223) | GND | VOUT (2), VOUT tab | VIN | — | HA variant swaps order |
| S (TO-263-3) | GND | VOUT | VIN | — | Tab = VOUT |
| D/DA (TO-252-2) | GND | VOUT | VIN | — | Multiple pin-orientation variants (1)/(3)/(4) |
| M (SOIC-8, Fixed) | GND | VOUT | GND | VIN | EN on pin 8; pins 5-7 are additional GND |
| M (SOIC-8, Adjustable) | VOUT | GND | ADJ | VIN | EN on pin 8; pin 6 = ADJ |
| MP (PSOP-8, Fixed) | GND | VOUT | GND | VIN | Same as SOIC-8 layout |
| MP (PSOP-8, Adjustable) | VOUT | GND | ADJ | VIN | Same as SOIC-8 adjustable layout |
EN (pin 8 on SOIC/PSOP): Chip Enable. H = normal work, L = shutdown output.
## Absolute Maximum Ratings
| Parameter | Symbol | Value | Unit |
| --- | --- | --- | --- |
| Power Supply Voltage | VIN | 6.5 | V |
| Operating Junction Temperature | TJ | 150 | °C |
| Storage Temperature Range | TSTG | −65 to 150 | °C |
| Lead Temperature (Soldering, 10 s) | TLEAD | 260 | °C |
| θJA (SOIC-8) | — | 144 | °C/W |
| θJA (PSOP-8) | — | 43.7 | °C/W |
| θJA (SOT-223) | — | 55.9 | °C/W |
| θJA (TO-252-2 (1)(3)(4)) | — | 35 | °C/W |
| θJA (TO-263-3) | — | 22 | °C/W |
| ESD (Machine Model) | — | 400 | V |
| ESD (Human Body Model) | — | 4000 | V |
## Recommended Operating Conditions
| Parameter | Symbol | Min | Max | Unit |
| --- | --- | --- | --- | --- |
| Supply Voltage | VIN | 2.5 | 6.0 | V |
| Operating Ambient Temperature Range | TA | −40 | +85 | °C |
## Electrical Characteristics
AP2114-1.2 electrical characteristics: VIN = 2.5 V, CIN = 4.7 µF (ceramic), COUT = 4.7 µF (ceramic), TA = 25 °C typical. **Bold** applies over −40 to +85 °C unless otherwise specified.
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
| --- | --- | --- | --- | --- | --- | --- |
| Output Voltage | VOUT | VIN = 2.5 V, 1 mA ≤ IOUT ≤ 30 mA | VOUT·98.5 % | 1.2 | VOUT·101.5 % | V |
| Input Voltage | VIN | | | | 6.0 | V |
| Maximum Output Current | IOUT(MAX) | VIN = 2.5 V, VOUT ≥ 1.182 V to 1.218 V | 1 | | | A |
| Load Regulation | ΔVOUT/VOUT/ΔIOUT | VIN = 2.5 V, 1 mA ≤ IOUT ≤ 1 A | | 0.2 | 1 | %/A |
| Line Regulation | ΔVOUT/VOUT/VIN | 2.5 V ≤ VIN ≤ 6 V, IOUT = 30 mA | −0.1 | 0.02 | 0.1 | %/V |
| Dropout Voltage | VDROP | IOUT = 1 A | | 1200 | 1300 | mV |
| Quiescent Current | IQ | VIN = 2.5 V, IOUT = 0 mA | | 60 | 75 | µA |
| PSRR | — | Ripple 1 Vp-p, VIN = 2.5 V, IOUT = 100 mA, f = 100 Hz | | 68 | | dB |
| PSRR | — | f = 1 kHz | | 68 | | dB |
| Output Voltage Temperature Coefficient | ΔVOUT/VOUT/ΔT | IOUT = 30 mA, TA = −40 °C to 85 °C | | ±30 | | ppm/°C |
| Short Current Limit | ISHORT | VOUT = 0 V | | 50 | | mA |
| Standby Current | ISTD | VIN = 2.5 V, VEN in OFF mode | | 0.01 | 1.0 | µA |
| RMS Output Noise | VNOISE | 10 Hz ≤ f ≤ 100 kHz (No Load) | | 30 | | µVRMS |
| VEN High Voltage | VIH | Enable logic high, regulator on | 1.5 | | | V |
| VEN Low Voltage | VIL | Enable logic low, regulator off | | | 0.4 | V |
| Start-up Time | tS | No load | | 20 | | µs |
| EN Pull-Down Resistor | RPD | | | 3.0 | | MΩ |
| VOUT Discharge Resistor | RDCHG | Set EN pin at Low | | 60 | | Ω |
| Thermal Shutdown Temperature | TOTSD | | | 160 | | °C |
| Thermal Shutdown Hysteresis | THYSTSD | | | 25 | | °C |
## Packages
Available as:
- SOT-223 (H/HA)
- TO-263-3 (S)
- TO-252-2 (D, DA, various pin orientations (1), (3), (4))
- SOIC-8 (M)
- PSOP-8 (MP)
Output voltages: 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and adjustable (0.8 V – 5.0 V).
## Applications
- LCD monitor
- LCD TV
- Set-top box (STB)
### Usage notes
- Input and output require ceramic, tantalum, or aluminum electrolytic capacitors; 4.7 µF is a flexible default.
- The EN pin has a 3 MΩ internal pull-down, so it defaults OFF if left floating.
- At shutdown (EN low), VOUT is actively pulled down through a 60 Ω discharge resistor.
- To prevent short-circuit protection from being prematurely activated, the input voltage must be applied before a current-source load is applied.