L5972D

Output Power :
Mounting Style : SMD/SMT
Packaging : Tube
Output Current : 2 A
Package / Case : SO-8
Operating Temperature Range : - 40 C to + 150 C
Output Voltage : 35 V
Switching Frequency : 212 KHz to 280 KHz
Input Voltage : 4.4 V to 36 V


Features:

·2A INTERNAL SWITCH
·OPERATING INPUT VOLTAGE FROM 4.4V  TO 36V
·OUTPUT VOLTAGE ADJUSTABLE FROM  1.235V TO 35V
·LOW DROPOUT OPERATION: 100% DUTY  CYCLE
·250KHz INTERNALLY FIXED FREQUENCY
·VOLTAGE FEEDFORWARD
·ZERO LOAD CURRENT OPERATION
·INTERNAL CURRENT LIMITING PROTECTION AGAINST FEEDBACK  DISCONNECTION
·THERMAL SHUTDOWN


Application

·CONSUMER: STB, DVD, TV, VCR,CAR  RADIO, LCD MONITORS
·NETWORKING: XDSL, MODEMS,DC-DC  MODULES COMPUTER: PRINTERS, AUDIO/GRAPHIC 
·CARDS, OPTICAL STORAGE, HARD DISK  DRIVE
·INDUSTRIAL: CHARGERS, CAR BATTERY  DC-DC CONVERTERS


Pinout




Specifications

Symbol	Parameter	Value	Unit
V8	Input Voltage	40	V
V1	Output DC voltage Output peak voltage at t = 0.1s	-1 to 40 -5 to 40	V V
I1	Maximum output current	int. limit.
V4,V5	Analog pins	4	V
Ptot	Power dissipation at Tamb 70	2.25	W
Tj	Operating junction temperature range	-40 to 150
Tstg	Storage temperature range	-55 to 150

Description

The L5972D is a step down monolithic power switch-  ing regulator with a minimum switch current limit of 2A so it is able to deliver more than 1.5A DC current to the load depending on the application conditions.

The output voltage can be set from 1.235V to 35V.

L5972D uses an internal P-Channel D-MOS tran- sistor (with a typical Rdson of 250m ?) as switching element to minimize the size of the external compo- nents.

An internal oscillator fixes the switching frequency at 250KHz.

Having a minimum input voltage of 4.4V only, L5972D  is particularly suitable for 5V bus, available in all com- puter related applications.
 
Pulse by pulse current limit with the internal frequen- cy modulation offers an effective constant current short circuit protection.

Parameters:

Technical/Catalog Information	L5972D
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	4.4 ~ 36 V
Voltage - Output	1.24 ~ 35 V
Current - Output	2A
Power - Output	1.2W
Package / Case	8-SOIC (3.9mm Width)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	No
Rds (On)	250 mOhm
Operating Temperature	-40°C ~ 150°C
Frequency - Switching	250kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L5972D L5972D