ST8R00 Datasheet, PDF (1/19 Pages) STMicroelectronics – Micropower 1A synchronous step-up DC-DC converter

ST8R00
Micropower 1A synchronous step-up DC-DC converter
Features
■ Very low supply current: 500µA (typ)
■ Output voltage adjustable from 6V to 12V
■ Output voltage accuracy: ±2%
■ Output current up to 1A
■ Low ripple voltage: 5mV (typ)
■ Synchronous rectification
■ High 90% efficiency: V_O = 9V (typ)
■ Few external components
■ Very small DFN8 (4x4mm) package
Description
The ST8R00 family of low quiescent current,
synchronous PWM step-up DC-DC converters
offer high efficiency even in light load conditions.
The ST8R00 accepts a positive input voltage from
4 to 6V and provides an output voltage in the 6 to
12V range.
The ST8R00 is developed in two versions: Burst
mode and Continuous mode. The Burst mode
version functions in discontinuous mode, allowing
the device to maintain the regulated voltage in no
load conditions by turning off the internal
switches. The Continuous mode version,
DFN8 4x4mm
ST8R00W, guarantees the lowest switching ripple
when the device is used at light load conditions.
The high switching frequency and internally
limited peak inductor current permit the use of
small, low-cost inductors. Only three external
components are required: an inductor and two
ceramic capacitors.
The ST8R00 is suitable for use in equipment
where low noise, low ripple and low supply current
are required. The ST8R00 is available in a very
small DFN8 4x4mm package.
Order codes
Part number
ST8R00 ⁽¹⁾
ST8R00W ⁽²⁾
1. Burst mode at light load
2. Full PWM mode
May 2007
Package
ST8R00PUR
ST8R00WPUR
Rev. 1
Output voltages
ADJ
ADJ
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