uP1586 - uPI Semiconductor

uP1586 Dual Synchronous Buck Controller

The uP1586 is a dual synchronous buck controller with 5V/3.3V 100mA LDOs for notebook system power supply solution. The uP1586 supports high efficiency, fast transient response and provides a combined POK signal. The ultrasonic mode maintains the switching frequency above audio frequency, which eliminates noise in audio applications. The proprietary RCOTTM t.

Features

include overcurrent protection, overvoltage protection, power-up sequencing, power OK output, and thermal shutdown. The uP1586 is available in the space saving package VQFN4x4-24L, specified from -40OC to 85OC. Applications † Notebook and Subnotebook System Power Supplies † 3-4 Cell Li-Ion Battery-Power Devices † Dual Output Supplies for DSP, Memory, Logic and Microprocessor Features † Wide Input Voltage Range: 6V to 26V † Two Synchronous Buck Controllers „ Dual Fixed 5V/3.3V Outputs or Adjustable from 2V to 5.5V „ Selectable PWM, DEM and USM in Light Load „ Internal Soft-start and Soft-Disch.