L5971 Datasheet PDF | STMicroelectronics

STMicroelectronics L5971

The L5971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 1.26V and 20V (selected by a simple external divider). The device is available in plastic dual in line, MINIDIP 8 for standard assembly, and SO16 for SMD assembly.

Part No.	L5971
Datasheet	L5971 Download
Manufacturer	STMicroelectronics
Description	1.5A STEP DOWN SWITCHING REGULATOR
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DESCRIPTION

Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed. TYPICAL APPLICATION CIRCUIT Vi=6V to 28V R1 22K 3(4) 2(3) C2 1.2nF C5 47nF Minidip SO16W ORDERING NUMBERS: L5971 (Minidip) L5971D (SO16) A switching frequency up to 500KHz is achievable (the maximum power dissipation of the packages must be observed).

FEATURES

of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. Typical

APPLICATIONS

: - High efficiency step-down converter - Portable computers - Battery charger - Distributed power - PDAs and Mobile Comminicators 5(11) 8(14) L5971 7(13) 4(5,6) VO=2.5V/1.5A L1 30µH R3 1(2) 6(12) C1 47µF 30V R2 9.1K C4 22nF C6 100nF D1 STPS 3L40U C8 330µF R4...