Overview
The ADP2140ACPZ18812R7 is a highly integrated power management IC produced by Analog Devices Inc. This component combines a high-efficiency, low quiescent current 600 mA step-down dc-to-dc converter (buck regulator) and a 300 mA low dropout linear regulator (LDO) in a compact 10-lead LFCSP package. It is designed to operate over 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 | Value |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V |
| Output 1 (Buck Regulator) | 1.875 V, 600 mA |
| Output 2 (LDO Regulator) | 1.2 V, 300 mA |
| Switching Frequency | 3 MHz |
| Quiescent Current (Buck Regulator) | 22 μA with zero load, 20 μA in PSM mode |
| 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 |
| Package | 10-lead LFCSP (3 mm × 3 mm) |
| Operating Temperature | −40°C to +125°C |
Key Features
- High efficiency, low quiescent current buck regulator and LDO.
- Low dropout voltage and high PSRR for the LDO.
- 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.
- Compact 10-lead LFCSP package.
Applications
The ADP2140ACPZ18812R7 is suitable for a variety of applications, including:
- 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 ADP2140ACPZ18812R7?
The input voltage range is 2.3 V to 5.5 V. - What are the output voltages and currents of the buck and LDO regulators?
The buck regulator outputs 1.875 V at 600 mA, and the LDO regulator outputs 1.2 V at 300 mA. - What is the switching frequency of the buck regulator?
The switching frequency is 3 MHz. - What is the quiescent current of the buck regulator?
The quiescent current is 22 μA with zero load and 20 μA in PSM mode. - What is the shutdown current of the device?
The shutdown current is less than 0.3 μA. - What are the key protection features of the ADP2140ACPZ18812R7?
The device includes undervoltage lockout, short-circuit protection, and thermal overload protection. - What is the package type and size of the ADP2140ACPZ18812R7?
The package is a 10-lead LFCSP with dimensions of 3 mm × 3 mm. - What is the operating temperature range of the device?
The operating temperature range is −40°C to +125°C. - What are some typical applications for the ADP2140ACPZ18812R7?
Typical applications include mobile phones, personal media players, digital cameras, and portable battery-powered equipment. - Does the ADP2140ACPZ18812R7 have power sequencing options?
Yes, the device has optional enable sequencing and autosequencing modes.
