The ADP3051 is a low noise, current mode, pulse width modulated (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 rectifier.
The ADP3051 is a low‑noise, current‑mode PWM step‑down converter that delivers over 500 mA with an input range of 2.7 V to 5.5 V and output as low as 0.8 V. It features a synchronous rectifier, 550 kHz switching frequency and a micropower shutdown mode, making it suitable for handheld, MP3 player and PDA applications.
The handbook includes detailed specifications, absolute maximum ratings, pin configuration, typical performance graphs, layout recommendations, outline dimensions and an ordering guide. It also covers theory of operation, PWM control, Tri‑Mode operation, shutdown behavior and design procedures for optimal performance.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Output Voltage Range | 0.8 V to 5.5 V |
| Current Limit Threshold | 680 – 1320 mA |
| Shutdown Supply Current | 10 – 25 pA |
| Package | 8‑Lead Mini Small Outline Package (MSOP) |
The device operates from 2.7 V up to 5.5 V.
The part is offered in an 8‑lead MSOP (Mini Small Outline Package).
The shutdown supply current is between 10 pA and 25 pA.