L5989D Datasheet, PDF (1/51 Pages) STMicroelectronics – 4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectification

L5989D
4 A continuous (more than 5 A pulsed) step-down switching
regulator with synchronous rectification
Features
■ 4 A output current (more than 5 pulsed)
■ Operating input voltage from 2.9 V to 18 V
■ External 1.8 V ± 2% reference voltage
■ Output voltage from 0.6 to input voltage
■ MLCC compatible
■ 200 ns T_ON
■ Programmable UVLO matches 3.3 V, 5 V and
12 V bus
■ F_SW programmable up to 1 MHz
■ Voltage feed-forward
■ Zero load current operation
■ Programmable current limit on both switches
■ Programmable sink current capability
■ Pre-bias start up capability
■ Thermal shutdown
HTSSOP 16
Applications
■ Consumer: STB, DVD, LCD TV, VCR, car
radio, LCD monitors
■ Networking: XDSL, modems, routers and
switches
■ Computer and peripherals: printers, audio /
graphic cards, optical storage, hard disk drive
■ Industrial: DC-DC modules, factory automation
■ HC LED driving
Figure 1. Test application circuit
L5989D
January 2010
Doc ID 15778 Rev 3
1/51
www.st.com
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