L4970A

Output Power :
Output Current : 10 A
Packaging : Tube
Mounting Style : Through Hole
Output Voltage : 40 V
Operating Temperature Range : - 40 C to + 150 C
Package / Case : Multiwatt-15
Input Voltage : 15 V to 50 V
Switching Frequency : 180 KHz to 220 KHz


Pinout




Specifications

Symbol	Parameter	Value	Unit
V9	Input voltage	55	V
V9	Input to output voltage difference	50	V
V7	Negative output DC voltage	-1 -7	V
I7	Negative output peak voltage at t = 0.1ms; f = 100KHz	Internally Limited	V
V6	Voltage at pin 3 and 6	65 V9 + 15	V
V3,V12	Voltage at pin 2	12	V
V4	Pin 3 sink current	50	mA
I4	Pin 5 source current	50	mA
PTOT	Power dissipation at Tcase 90°C	20	W
Tj, Tstg	Junction and storage temperature	-40 to 150	°C

Description

The L4970A is a stepdown monolithic power switching regulator delivering 10A at a voltage variable from 5.1 to 40V.
Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4970A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. L4970A is mounted in a 15-lead multiwatt plastic power package and requires few external components. Efficientoperation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components.

Parameters:

Technical/Catalog Information	L4970A
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	15 ~ 50 V
Voltage - Output	5.1 ~ 40 V
Current - Output	10A
Power - Output	30W
Package / Case	Multiwatt-15 (Vertical, Bent and Staggered Leads)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	Yes
Rds (On)	-
Operating Temperature	0°C ~ 125°C
Frequency - Switching	200kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L4970A L4970A 497 1410 5 ND 49714105ND 497-1410-5