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L6727 Datenblatt(PDF) 1 Page - STMicroelectronics

Teilenummer L6727
Bauteilbeschribung  Single phase PWM controller
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6727 Datenblatt(HTML) 1 Page - STMicroelectronics

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March 2010
Doc ID 12933 Rev 4
1/34
34
L6727
Single phase PWM controller
Feature
Flexible power supply from 5 V to 12 V
Power conversion input as low as 1.5 V
1 % output voltage accuracy
High-current integrated drivers
Adjustable output voltage
0.8 V internal reference
Simple voltage mode control loop
Sensorless and programmable OCP across
Low-side RdsON
Oscillator internally fixed at 300 kHz
Internal Soft-start
LS-LESS to manage pre-bias start-up
Disable function
OV / UV protection
FB disconnection protection
SO-8 package
Applications
Subsystem power supply (MCH, IOCH, PCI...)
Memory and termination supply
CPU and DSP power supply
Distributed power supply
General DC / DC converters
Description
L6727 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 VIN as low as 1.5 V and device
supply voltage in the range of 5 V to 12 V.
L6727 provides simple control loop with voltage-
mode error-amplifier. The integrated 0.8 V
reference allows regulating output voltages with
±1 % accuracy over line and temperature
variations. Oscillator is internally fixed to 300 kHz.
L6727 provides programmable over current
protection as well as over and under voltage
protection. Current information is monitored
across the low-side MOSFET RdsON saving the
use of expensive and space-consuming sense
resistors while output voltage is monitored
through FB pin.
FB disconnection protection prevents excessive
and dangerous output voltages in case of floating
FB pin.
SO-8
Table 1.
Device summary
Order codes
Package
Packaging
L6727
SO-8
Tube
L6727TR
Tape and reel
www.st.com


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