L6739 Datasheet, PDF (1/30 Pages) STMicroelectronics – CPU and DSP power supply

L6739
Single-phase PWM controller with light-load efficiency optimization
VFQFPN16
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 switch
 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
 Overtemperature protection
 Programmable oscillator up to 600 kHz
 LS-less to manage pre-bias startup
 Adjustable output voltage
 Disable function
 Internal soft-start
 VFQFPN 16 - 3 x 3 mm package
Datasheet - production data
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 L6739 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 V_IN as low as 1.5 V
and the device supply voltage ranging from 5 V to
12 V bus.
The L6739 device 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 L6739 provides a programmable overcurrent
protection and overvoltage protection. The current
information is monitored across the inductor DCR.
The L6739 device is available in a VFQFPN 16 -
3 x 3 mm package.
Table 1. Device summary
Order code
Package
Packing
L6739TR
VFQFPN16
Tape and reel
May 2014
This is information on a product in full production.
DocID026384 Rev 1
1/30
www.st.com