L4972AD

Output Power :
Mounting Style : SMD/SMT
Packaging : Tube
Output Current : 2 A
Output Voltage : 40 V
Operating Temperature Range : - 40 C to + 150 C
Input Voltage : 15 V to 50 V
Package / Case : SO-20
Switching Frequency : 90 KHz to 110 KHz


Pinout




Specifications

Symbol	Parameter	Value	Unit
V11	Input voltage	55	V
V11	Input to output voltage difference	50	V
V20	Negative output DC voltage	-1 -5	V
I20	Negative output peak voltage at t = 0.1ms; f = 100KHz	Internally Limited	V
V1	Voltage at pin 3 and 6	65 V11 + 15	V
V4,V8	Voltage at pin 2	12	V
V3	Pin 3 sink current	50	mA
I3	Pin 5 source current	50	mA
PTOT	Power dissipation at Tcase 90°C	5 / 3.75(*) 1.3/1 (*)	W W
Tj, Tstg	Junction and storage temperature	-40 to 150	°C

Description

The L4972Aisa stepdownmonolithicpowerswitching regulatordelivering2Aat avoltagevariable from 5.1 to 40V.

Realized with BCD mixed technology, L4972Aisa uses a DMOS output transistor to obtain very high efficiencyand very fast switching times. Featuresofthe L4972A include reset and power fail for microprocessors,
feed forward line regulation, soft start ,limiting current and thermal protection. L4972Aisa is mountedin a Powerdip16 + 2 + 2and SO20large plastic packages and requires few external components. Efficient operation at switching frequencies up to 200KHz allows reduction in the size and cost of external filter component.

Parameters:

Technical/Catalog Information	L4972AD
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	2A
Power - Output	3.75W
Package / Case	20-SOIC (7.5mm Width)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	No
Rds (On)	-
Operating Temperature	-40°C ~ 150°C
Frequency - Switching	100kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L4972AD L4972AD 497 4207 5 ND 49742075ND 497-4207-5