L6728AH Datasheet (data sheet) PDF





L6728AH Datasheet, Single-phase Switching DC-DC Controllers & Smart Regulators

L6728AH   L6728AH  

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www.DataSheet4U.com L6728AH High freque ncy single phase PWM controller with Po wer Good Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Flexible power supply from 5 V to 12 V Power conversion input as low as 1.5 V 0.8 V internal reference 0.8% output v oltage accuracy High-current integrated drivers Power Good output Sensorless a nd programmable OCP across low-side RDS (on) OV / UV protections VSEN disconnec tion protection Oscillator internally f ixed at 600 kHz LS-LESS to manage pre-b ias start-up Adjustable output voltage Disable function Internal soft-start VF DFPN 10 package VFQFPN 10 Description L6728AH is a single-phase step-down controller with int

L6728AH Datasheet, Single-phase Switching DC-DC Controllers & Smart Regulators

L6728AH   L6728AH  
egrated high-current drivers that provid es complete control logic and protectio n to realize in a simple way general DC -DC converters by using a compact VFDFP N 10 package. Device flexibility allows managing conversions with power input VIN as low as 1.5 V and device supply v oltage ranging from 5 V to 12 V. L6728A H provides simple control loop with vol tage mode EA. The integrated 0.8 V refe rence allows regulating output voltages with ±0.8% accuracy over line and tem perature variations. Oscillator is inte rnally fixed to 600 kHz. L6728AH provid es programmable dual level over current protection as well as over and under v oltage protection. Current information is monitored across the low-side MOSFET RDS(on) saving the use of expensive an d spaceconsuming sense resistors. PGOOD output easily provides real-time infor mation on output voltage status, throug h VSEN dedicated output monitor. Appli cations ■ ■ ■ ■ ■ Memory and termination supply Subsystem power sup ply (MCH, IOCH, PCI) CPU and DSP power supply Distributed power supply General DC / DC converters Table 1. Device s ummary Order codes L6728AH L6728AHTR Pa ckage Packing Tube Tape and reel VFDFP N 10 May 2009 Doc ID 15726 Rev 1 1/3 3 www.st.com 33 www.DataSheet4U.com C ontents L6728AH Contents 1 Typical application circuit and b








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