Overview
The ADP2140ACPZ1533R7, produced by Analog Devices Inc., is a highly integrated power management solution that combines a high-efficiency, low quiescent current 600 mA step-down DC-to-DC converter with a 300 mA Low Dropout (LDO) linear regulator. This device is packaged in a compact 10-lead 3 mm x 3 mm LFCSP, making it ideal for space-constrained applications. The ADP2140 is designed to optimize power efficiency and minimize component count, requiring only four external components for operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 to 5.5 | V |
| Buck Regulator Output Current | 600 | mA |
| LDO Output Current | 300 | mA |
| Buck Quiescent Current (PSM Mode) | 20 | μA |
| Shutdown Current | < 0.3 | μA |
| LDO Dropout Voltage @ 300 mA | 110 | mV |
| LDO PSRR @ 10 kHz | 65 | dB |
| LDO Noise @ VOUT2 = 1.2 V | 40 | μV rms |
| Initial Accuracy | ±1% | |
| Package Type | 10-lead LFCSP | |
| Package Dimensions | 3 mm x 3 mm x 0.75 mm |
Key Features
- High-efficiency, low quiescent current 600 mA step-down DC-to-DC converter.
- 300 mA LDO linear regulator with low dropout voltage and high PSRR.
- Low noise LDO output.
- Power-good indicator and optional enable sequencing.
- Soft start to prevent input current overshoot at startup.
- Short-circuit protection and thermal overload protection.
- Undervoltage lockout to prevent deep battery discharge.
- Compact 10-lead LFCSP package.
- Supports input voltages from single Li+/Li− polymer cell, multiple alkaline/NiMH cells, PCMCIA, and other standard power sources.
Applications
- Mobile phones.
- Personal media players.
- Digital cameras and audio devices.
- Portable and battery-powered equipment.
Q & A
- What is the input voltage range of the ADP2140?
The input voltage range of the ADP2140 is from 2.3 V to 5.5 V.
- What are the output currents of the buck regulator and LDO?
The buck regulator can deliver up to 600 mA, and the LDO can deliver up to 300 mA.
- What is the quiescent current of the buck regulator in PSM mode?
The quiescent current of the buck regulator in PSM mode is 20 μA.
- What is the dropout voltage of the LDO at 300 mA load?
The dropout voltage of the LDO at 300 mA load is 110 mV.
- Does the ADP2140 have protection features?
- What is the package type and dimensions of the ADP2140?
The ADP2140 is packaged in a 10-lead LFCSP with dimensions of 3 mm x 3 mm x 0.75 mm.
- What are some typical applications of the ADP2140?
Typical applications include mobile phones, personal media players, digital cameras, and other portable and battery-powered equipment.
- Does the ADP2140 support power sequencing?
- What is the noise level of the LDO output?
The noise level of the LDO output is 40 μV rms at VOUT2 = 1.2 V.
- How many external components are required for the ADP2140 to operate?
The ADP2140 requires only four external components to operate.
