Overview
The ADP2140ACPZ1233R7, produced by Analog Devices Inc., is a highly integrated power management IC that combines a high-efficiency, low quiescent current 600 mA stepdown dc-to-dc converter (buck regulator) with a 300 mA low dropout linear regulator (LDO). 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. It supports a wide input voltage range of 2.3 V to 5.5 V, making it suitable for various power sources including single Li+/Li− polymer cells, multiple alkaline/NiMH cells, and other standard power sources.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V |
| Buck Regulator Output Current | 600 mA |
| LDO Output Current | 300 mA |
| Buck Regulator Quiescent Current | 20 μA in PSM mode, 22 μA with zero load |
| Shutdown Current | < 0.3 μA |
| LDO Dropout Voltage | 110 mV @ 300 mA load |
| LDO PSRR | 65 dB @ 10 kHz, 55 dB @ 100 kHz at VOUT2 = 1.2 V |
| LDO Noise | 40 μV rms at VOUT2 = 1.2 V |
| Initial Accuracy | ±1% |
| Package Type | 10-lead 3 mm x 3 mm LFCSP |
| Minimum Input and Output Capacitance | 7.5 μF to 10 μF for Buck, 0.7 μF to 1.0 μF for LDO |
| Minimum Inductor Value | 0.7 μH to 1 μH |
Key Features
- High-efficiency, low quiescent current 600 mA stepdown dc-to-dc converter (buck regulator)
- 300 mA low dropout linear regulator (LDO)
- Low quiescent current: 20 μA in PSM mode, 22 μA with zero load
- Low shutdown current: < 0.3 μA
- Low LDO dropout voltage: 110 mV @ 300 mA load
- High LDO PSRR: 65 dB @ 10 kHz, 55 dB @ 100 kHz at VOUT2 = 1.2 V
- Low noise LDO: 40 μV rms at VOUT2 = 1.2 V
- Initial accuracy: ±1%
- Current-limit and thermal overload protection
- Power-good indicator
- Optional enable sequencing
- Soft start to prevent input current overshoot at startup
- Undervoltage lockout to prevent deep battery discharge
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 ADP2140 in PSM mode?
The quiescent current in PSM mode is 20 μA.
- 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 of the LDO at 300 mA load is 110 mV.
- What is the PSRR of the LDO at 10 kHz and 100 kHz?
The PSRR of the LDO is 65 dB at 10 kHz and 55 dB at 100 kHz at VOUT2 = 1.2 V.
- What is the noise level of the LDO at VOUT2 = 1.2 V?
The noise level of the LDO at VOUT2 = 1.2 V is 40 μV rms.
- What protection features does the ADP2140 include?
The ADP2140 includes current-limit, thermal overload protection, and undervoltage lockout.
- What is the package type of the ADP2140?
The ADP2140 is packaged in a 10-lead 3 mm x 3 mm LFCSP.
- What are the typical applications of the ADP2140?
The ADP2140 is typically used in mobile phones, personal media players, digital cameras and audio devices, and other portable and battery-powered equipment.
