L6728AHTR STMicroelectronics

L6728AH High frequency single phase PWM controller with Power Good Datasheet - production data Description The L6728AH is a single phase step-down controller with integrated high-current drivers, that provides complete control logic and protection to realize in a simple way general DC-DC converters by using a compact VFDFPN 10 package. VFDFPN 10 Device flexibility allows managing conversions with power input V as low as 1.5 V and device IN supply voltage ranging from 5 V to 12 V. Features The L6728AH device provides a simple control Flexible power supply from 5 V to 12 V loop with the voltage mode EA. The integrated 0.8 V reference allows regulating output voltages Power conversion input as low as 1.5 V with 0.8% accuracy over line and temperature 0.8 V internal reference variations. The oscillator is internally fixed to 0.8% output voltage accuracy 600 kHz. High-current integrated drivers The L6728AH provides programmable dual level overcurrent protection as well as over and Power Good output undervoltage protection. Current information is Sensorless and programmable OCP across monitored across the low-side MOSFET R DS(on) low-side R DS(on) saving the use of expensive and space- OV / UV protections consuming sense resistors. VSEN disconnection protection The PGOOD output easily provides real-time Oscillator internally fixed at 600 kHz information on output voltage status, through VSEN dedicated output monitor. LS-less to manage pre-bias startup Adjustable output voltage Table 1. Device summary Disable function Order codes Package Packing Internal soft-start L6728AH Tube VFDFPN 10 package VFDFPN 10 L6728AHTR Tape and reel Applications Memory and termination supply Subsystem power supply (MCH, IOCH, PCI) CPU and DSP power supply Distributed power supply General DC / DC converters August 2016 DocID15726 Rev 2 1/36 This is information on a product in full production. www.st.com Obsolete Product(s) - Obsolete Product(s)Contents L6728AH Contents 1 Typical application circuit and block diagram 4 1.1 Application circuit 4 1.2 Block diagram . 4 2 Pins description and connection diagrams 5 2.1 Pin descriptions . 5 2.2 Thermal data . 6 3 Electrical specifications 7 3.1 Absolute maximum ratings . 7 3.2 Electrical characteristics . 7 4 Device description 9 5 Driver section . 10 Power dissipation . 11 6 Soft-start 12 Low-side-less start up (LS-less) 12 7 Overcurrent protection 13 Overcurrent threshold setting 14 8 Output voltage setting and protections 15 9 Application details . 16 9.1 Compensation network . 16 9.2 Layout guidelines . 18 10 Application information . 20 10.1 Inductor design . 20 10.2 Output capacitor(s) 21 10.3 Input capacitors 22 2/36 DocID15726 Rev 2 Obsolete Product(s) - Obsolete Product(s)