The ADP2105/ADP2106/ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters. It features extremely high efficiency, ultralow quiescent current, 1.2MHz switching frequency, 0.1µA shutdown supply current, maximum load current ADP2105: 1A, ADP2106: 1.5A, ADP2107: 2A, input voltage 2.7V to 5.5V, output voltage 0.8V to VIN, maximum duty cycle 100%, smooth transition to low dropout (LDO) mode, internal synchronous rectifier, small 16-lead 4mm x 4mm LFCSP_VQ package, optimized for small ceramic output capacitors, enable/shutdown logic input, undervoltage lockout, soft start
The ADP2105, ADP2106, and ADP2107 are low‑quiescent‑current, synchronous step‑down converters offered in a compact 4 mm × 4 mm LFCSP package. They operate from 2.7 V to 5.5 V input and provide adjustable output from 0.8 V up to the input voltage, with preset options at 1.2 V, 1.5 V, 1.8 V, and 3.3 V. Maximum load currents are 1 A, 1.5 A, and 2 A respectively.
Key features include up to 97 % efficiency, a 1.2 MHz switching frequency, ultralow quiescent current (20 pA), 0.1 pA shutdown supply current, internal synchronous rectifier, and programmable soft‑start. The datasheet provides detailed specifications, pin descriptions, typical performance curves, and design guidelines for external component selection.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Efficiency | up to 97 % |
| Switching Frequency | 1.2 MHz |
| Shutdown Supply Current | 0.1 pA |
| Output Voltage Range | 0.8 V to Vin (adjustable) |
The devices achieve up to 97 % efficiency.
They operate from 2.7 V to 5.5 V.
The shutdown supply current is 0.1 pA.