L6726A_07 Datasheet, PDF (1/24 Pages) STMicroelectronics – Single phase PWM controller

L6726A
Single phase PWM controller
Feature
■ Flexible power supply from 5V to 12V
■ Power conversion input as low as 1.5V
■ 1% output voltage accuracy
■ High-current integrated drivers
■ Adjustable output voltage
■ 0.8V internal reference
■ Sensorless and programmable OCP across
Low-side R_dsON
■ Oscillator internally fixed at 270kHz
■ Programmable soft-start
■ LS-LESS start up
■ Disable function
■ FB disconnection protection
■ SO-8 package
Applications
■ Subsystem power supply (MCH, IOCH, PCI...)
■ Memory and termination Supply
■ CPU & DSP power supply
■ Distributed power supply
■ General DC / DC converters
SO-8
Description
L6726A is a single-phase step-down controller
with integrated high-current drivers that provides
complete control logic, protections and reference
voltage to realize in an easy and simple way
general DC-DC converters by using a compact
SO-8 package.
Device flexibility allows managing conversions
with power input V_IN as low as 1.5V and device
supply voltage ranging from 5V to 12V.
L6726A provides simple control loop with trans-
conductance error amplifier. The integrated 0.8V
reference allows regulating output voltage with
±1% accuracy over line and temperature
variations. Oscillator is internally fixed to 270kHz.
L6726A provides programmable over current
protection. Current information is monitored
across the Low-Side mosfet R_dsON saving the use
of expensive and space-consuming sense
resistors.
FB disconnection protection prevents excessive
and dangerous output voltages in case of floating
FB pin.
Table 1. Device summary
Order codes
L6726A
L6726ATR
Package
SO-8
SO-8
Packaging
Tube
Tape & Reel
July 2007
Rev 3
1/24
www.st.com
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