The ADP3051 is a low noise, current mode, pulse width modulator (PWM) step-down converter capable of supplying over 500 mA to output voltages as low as 0.8 V. This device integrates a low resistance power switch and synchronous rectifier, providing excellent efficiency over the entire output voltage range and eliminating the need for a large and costly external components. It features current mode control, wide input voltage range, wide output voltage range, high efficiency operation, high accuracy, micropower shutdown mode, and compact MSOP-8 package.
The ADP3051 is a low‑noise, current‑mode PWM step‑down converter that integrates a low‑resistance power switch and synchronous rectifier for high efficiency across its output range. It operates at a fixed 550 kHz switching frequency and includes a micropower shutdown mode.
Typical applications include Li‑ion powered handhelds, MP3 players, PDAs, and other consumer electronics. The device is offered in a space‑saving 8‑lead MSOP package and is supplied with recommended external components for optimal performance.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Output Voltage Range | 0.8 V to 5.5 V |
| Maximum Output Current | 500 mA (over 500 mA) |
| Quiescent Supply Current | 180 pA min, 300 pA typ |
| Shutdown Supply Current | 10 µA min, 25 µA typ |
| Undervoltage Lockout Threshold | 1.9 V to 2.6 V |
| Feedback Regulation Voltage | 783 mV min, 800 mV typ, 821 mV max |
| Current Limit Threshold | 680 mA min, 1000 mA typ, 1320 mA max |
| Operating Ambient Temperature | -40 °C to +85 °C |
The ADP3051 operates from 2.7 V up to 5.5 V input.
It can supply over 500 mA to the load.
The device is offered in an 8‑lead MSOP (MSOP‑8) package.
Yes, it includes a pin‑controlled micropower shutdown mode.