STMicroelectronics L6738

Description

The L6738 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 the management of conversions with power input VINas low as 1.5 V and the device supply voltage ranging from 5 V to 12 V bus.

The L6738 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 the generation of output voltages with ±0.5% accuracy over line and temperature variations.

The oscillator is programmable up to 600 kHz.

The L6738 provides a programmable dual-level overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.

The L6738 is available in a VFQFPN 16 3x3 mm package.

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

Typical applications

• Distributed power supply
• CPU and DSP power supply
• Subsystem power supply (MCH, IOCH, PCI)
• Memory and termination supply
• General DC-DC converter

More information

• Datasheet
• IC product information