LA5744 Datasheet, PDF (1/5 Pages) Sanyo Semicon Device – Monolithic Linear IC Separately-Excited Step-Down Switching Regulator (Variable Type)

Ordering number : ENA0717C
LA5744
Monolithic Linear IC
Separately-Excited Step-Down
Switching Regulator
(Variable Type)
http://onsemi.com
Overview
The LA5744 is a separately-excited step-down switching regulator (variable type).
Functions
• High efficiency.
• Time-base generator (300kHz) incorporated.
• Current limiter incorporated.
• Thermal shutdown circuit incorporated.
• Soft start circuit incorporated.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Input voltage
Maximum output current
SW pin application reverse voltage
Allowable power dissipation
VIN
IO max
VSW
Pd max1
No heat sink
Pd max2
Infinite heat sink
Operating temperature
Topr
Storage temperature
Tstg
Junction temperature
Tj max
* Specified circuit board : 76.1×114.3×1.6mm³ : Copper foil ratio 60% FR4
Ratings
Unit
30
V
3
A
-1
V
1.75
W
7.5
W
-30 to +125
°C
-40 to +150
°C
150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions at Ta = 25°C
Parameter
Input voltage range
Symbol
VIN
Conditions
Ratings
Unit
4.5 to 28
V
Semiconductor Components Industries, LLC, 2013
August, 2013
52307 MS PC 20070522-S00004 / 42507 MS PC / 31407 MS PC / 30707 MS PC No.A0717-1/5