L6728H Datasheet (data sheet) PDF





L6728H Datasheet, Single-phase Switching DC-DC Controllers & Smart Regulators

L6728H   L6728H  

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www.DataSheet4U.com L6728H Single phase PWM controller with Power Good Feature s ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Flexible power supply from 5 V to 12 V Power conversio n input as low as 1.5 V 0.8 V internal reference 0.8% output voltage accuracy High-current integrated drivers Power G ood output Sensorless and programmable OCP across low-side RDS(on) OV / UV pro tections VSEN disconnection protection Oscillator internally fixed at 300 kHz LSless to manage pre-bias start-up Adju stable output voltage Disable function Internal soft-start DFN10 package DFN10 Description L6728H is a single-phase step-down controller with integrated high-current drive

L6728H Datasheet, Single-phase Switching DC-DC Controllers & Smart Regulators

L6728H   L6728H  
rs that provides complete control logic and protection to realize in a simple w ay general DC-DC converters by using a compact DFN10 package. Device flexibili ty allows managing conversions with pow er input VIN as low as 1.5 V and device supply voltage ranging from 5 V to 12 V. L6728H provides simple control loop with voltage mode EA. The integrated 0. 8 V reference allows regulating output voltages with ±0.8% accuracy over line and temperature variations. Oscillator is internally fixed to 300 kHz. L6728H provides programmable dual level over current protection as well as over and under voltage protection. Current infor mation is monitored across the low-side MOSFET RDS(on) saving the use of expen sive and spaceconsuming sense resistors . PGOOD output easily provides real-tim e information on output voltage status, through VSEN dedicated output monitor. Applications ■ ■ ■ ■ ■ Mem ory and termination supply Subsystem po wer supply (MCH, IOCH, PCI...) CPU and DSP power supply Distributed power supp ly General DC-DC converters Table 1. Device summary Order codes L6728H DFN10 L6728HTR Tape and reel Package Packagi ng Tube May 2009 Doc ID 15725 Rev 1 1/32 www.st.com 32 www.DataSheet4U.com Contents L6728H Contents 1 Typical application circuit and block diagram . . . . . . . . . . . .








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