Overview
The ADP2140ACPZ3312R7, produced by Analog Devices Inc., is a highly integrated power management IC that combines a high-efficiency, low quiescent current step-down DC-DC converter with a low dropout linear regulator (LDO). This device is designed to optimize power efficiency and minimize component count, making it ideal for portable and battery-powered applications. The ADP2140 features a 600 mA buck regulator and a 300 mA LDO, both packaged in a compact 10-lead LFCSP (Lead Frame Chip Scale Package) with dimensions of 3 mm x 3 mm x 0.75 mm. The device operates over a wide input voltage range of 2.3 V to 5.5 V, supporting various power sources including single Li+/Li− polymer cells, multiple alkaline/NiMH cells, and PCMCIA batteries.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 5.5 V | V |
| Buck Regulator Output Current | 600 mA | A |
| LDO Output Current | 300 mA | A |
| Switching Frequency | 3 MHz | Hz |
| Quiescent Current (Buck) | 22 μA (zero load), 20 μA (PSM mode) | A |
| Shutdown Current | < 0.3 μA | A |
| LDO Dropout Voltage | 110 mV @ 300 mA load | V |
| LDO PSRR | 65 dB @ 10 kHz, 55 dB @ 100 kHz | dB |
| LDO Noise | 40 μV rms @ VOUT2 = 1.2 V | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Type | 10-Lead LFCSP |
Key Features
- High-efficiency, low quiescent current step-down DC-DC converter and low dropout linear regulator (LDO)
- Power saving variable frequency mode to reduce switching frequency under light loads
- Soft start to prevent input current overshoot at startup
- Undervoltage lockout to prevent deep battery discharge
- Short-circuit protection and thermal overload protection
- Power-good indicator and optional enable sequencing through two enable inputs
- Low noise LDO with high PSRR
- Compact 10-lead LFCSP package
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 ADP2140 operates over an input voltage range of 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 switching frequency of the buck regulator?
The switching frequency of the buck regulator is 3 MHz.
- What are the quiescent current and shutdown current of the ADP2140?
The quiescent current is 22 μA (zero load) and 20 μA (PSM mode), and the shutdown current is less than 0.3 μA.
- What is the LDO dropout voltage and noise?
The LDO dropout voltage is 110 mV @ 300 mA load, and the noise is 40 μV rms @ VOUT2 = 1.2 V.
- What are the protection features of the ADP2140?
The ADP2140 includes undervoltage lockout, short-circuit protection, and thermal overload protection.
- 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 the typical applications of the ADP2140?
The ADP2140 is typically used in mobile phones, personal media players, digital cameras, and other portable and battery-powered equipment.
- Does the ADP2140 support power sequencing?
Yes, the ADP2140 supports power sequencing through two enable inputs.
- What is the operating temperature range of the ADP2140?
The operating temperature range of the ADP2140 is -40°C to +125°C.
