Overview
The ADP2140ACPZ3315R7, produced by Analog Devices Inc., is a highly integrated power management IC 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 × 3 mm LFCSP, making it ideal for space-constrained applications. The ADP2140 is designed to optimize battery life in portable devices by utilizing a power-saving variable frequency mode to reduce switching frequency under light loads. It also features soft start, internal compensation, and numerous power sequencing options, enhancing its versatility and reliability in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 to 5.5 | V |
| Buck Converter Output Current | 600 | mA |
| LDO Output Current | 300 | mA |
| Buck Quiescent Current (Zero Load) | 22 | μA |
| 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 |
| Package Type | 10-lead LFCSP | - |
| Operating Temperature Range | -40°C to +125°C | - |
Key Features
- High-efficiency, low quiescent current 600 mA step-down DC-to-DC converter
- 300 mA Low Dropout (LDO) linear regulator
- Power-saving variable frequency mode to reduce switching frequency under light loads
- Soft start to prevent input current overshoot at startup
- Internal compensation and power-good indicator
- Optional enable sequencing through two enable inputs
- Undervoltage lockout, short-circuit protection, and thermal overload protection
- Low noise LDO: 40 μV rms at VOUT2 = 1.2 V
- High LDO PSRR: 65 dB @ 10 kHz at VOUT2 = 1.2 V
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 is from 2.3 V to 5.5 V.
- What are the output currents of the buck converter and LDO? The buck converter can deliver up to 600 mA, and the LDO can deliver up to 300 mA.
- What is the quiescent current of the buck converter in zero load and PSM mode? The quiescent current is 22 μA in zero load and 20 μA in PSM mode.
- What is the shutdown current of the ADP2140? The shutdown current is less than 0.3 μA.
- What is the dropout voltage of the LDO at 300 mA load? The dropout voltage is 110 mV.
- What is the PSRR of the LDO at 10 kHz? The PSRR is 65 dB at 10 kHz.
- What is the noise level of the LDO at VOUT2 = 1.2 V? The noise level is 40 μV rms.
- What package type is the ADP2140 available in? The ADP2140 is available in a 10-lead LFCSP package.
- What is the operating temperature range of the ADP2140? The operating temperature range is from -40°C to +125°C.
- 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.
