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L6738ATR Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6738ATR
Description  Embedded bootstrap diode
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6738ATR Datasheet(HTML) 1 Page - STMicroelectronics

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January 2012
Doc ID 18134 Rev 2
1/32
32
L6738A
Single-phase PWM controller
with light-load efficiency optimization
Features
Flexible power supply from 5 V to 12 V bus
Power conversion input as low as 1.5 V
Light-load efficiency optimization
Embedded bootstrap diode
VIN detector
0.8 V internal reference
0.5% output voltage accuracy
Remote GND recovery
High-current integrated drivers
Sensorless and programmable precise-OC
sense across Inductor DCR
OV protection
Programmable oscillator up to 600 kHz
LS-less to manage pre-bias startup
Adjustable output voltage
Disable function
Internal soft-start
VFQFPN 16 3x3 mm package
Applications
Memory and termination supply
Subsystem power supply (MCH, IOCH, PCI)
CPU and DSP power supply
Distributed power supply
General DC-DC converter
Description
The L6738A is a single-phase step-down
controller with integrated high-current drivers that
provides complete control logic and protection to
realize a DC-DC converter.
The device flexibility allows to manage
conversions with power input VIN as low as 1.5V
and the device supply voltage ranging from 5 V to
12 V bus.
The L6738A features a proprietary algorithm that
allows Light-Load efficiency optimization,
boosting efficiency without compromising the
output voltage ripple.
The integrated 0.8 V reference allows generation
of output voltages with ±0.5% accuracy over line
and temperature variations.
The oscillator is programmable up to 600 kHz.
The L6738A provides a programmable
overcurrent protection and overvoltage protection.
The current information is monitored across the
inductor DCR.
The L6738A is available in a VFQFPN 16 3x3 mm
package.
Table 1.
Device summary
Order code
Package
Packing
L6738A
VFQFPN16
Tube
L6738ATR
VFQFPN16
Tape and reel
VFQFPN16
www.st.com


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