This document introduces the features of ADP2105/ADP2106/ADP2107, including up to 97% conversion efficiency, 20μA quiescent current, 1.2MHz switching frequency, 0.1μA shutdown current, 1A, 1.5A and 2A maximum load current, 2.7V to 5.5V input voltage, 0.8V to VIN output voltage, 100% maximum duty cycle, smooth transition to low dropout (LDO) mode, internal synchronous rectifier, small 16-lead 4mm×4mmLFCSP_VQ package, optimized for small ceramic output capacitors, enable/shutdown logic input, undervoltage lockout and soft start.
The ADP2105/ADP2106/ADP2107 are low quiescent current, synchronous, step-down DC-to-DC converters available in a compact 4mm x 4mm LFCSP_VQ package. These devices utilize a current-mode, constant-frequency pulse-width modulation (PWM) control scheme at medium to high load currents and switch to pulse frequency modulation (PFM) under light loads to save power.
Key features include extremely high efficiency up to 97%, an ultralow quiescent current of 20 pA, and a shutdown supply current of less than 0.1 µA. The converters operate with input voltages from 2.7 V to 5.5 V and offer preset output voltage options or adjustable outputs ranging from 0.8 V to the input voltage.
| Maximum Load Current (ADP2105) | 1 A |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V |
| Output Voltage Range (ADJ) | 0.8 V to Vin |
| Switching Frequency | 1.2 MHz |
| Quiescent Current | 20 pA |
| Shutdown Supply Current | < 0.1 µA |
| Package Type | 16-lead LFCSP_VQ |
The devices feature extremely high efficiency, reaching up to 97%.
Preset output voltage options include 3.3 V, 1.8 V, 1.5 V, and 1.2 V.
The LX Minimum On-Time in PWM mode with Vin = 5.5 V is 100 ns.
The device has a thermal shutdown threshold of 140 °C.