L4971

Output Power :
Operating Temperature Range : - 40 C to + 125 C
Packaging : Tube
Switching Frequency : 300 KHz
Mounting Style : Through Hole
Package / Case : PDIP-8
Output Current : 1.5 A
Input Voltage : 8 V to 55 V
Output Voltage : 3.3 V to 50 V


Pinout




Description

The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25W) to obtain very high efficency and high switching speed.
A switching frequency up to 500KHz is achievable (the maximum power dissipation of the packages must be observed).

A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V  cover the majority of today's applications.

Features of this new generations of DC-DC converter L4971 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.

L4971 is available in plastic dual in line, MINIDIP 8 for standard assembly, and SO16W for SMD assembly.

Parameters:

Technical/Catalog Information	L4971
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	8 ~ 55 V
Voltage - Output	3.3 ~ 50 V
Current - Output	1.5A
Power - Output	1W
Package / Case	8-DIP (300 mil)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	No
Rds (On)	250 mOhm
Operating Temperature	0°C ~ 125°C
Frequency - Switching	100kHz ~ 300kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L4971 L4971 497 6697 5 ND 49766975ND 497-6697-5