LA5779 Datasheet, PDF (1/4 Pages) Sanyo Semicon Device – Monolithic Linear IC Separately-excited Step-down Switching Regulator (Variable Type)

Ordering number : ENA0476A
LA5779
Monolithic Linear IC
Separately-excited Step-down
Switching Regulator
(Variable Type)
http://onsemi.com
Overview
The LA5779 is a Separately-excited step-down switching regulator (variable type).
Functions
• High efficiency.
• Six external parts.
• Time-base generator (160kHz) incorporated.
• Current limiter incorporated.
• Thermal shutdown circuit incorporated.
• ON/OFF function.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum Input voltage
Maximum Output current
SW pin application reverse voltage
Allowable power dissipation
Operating temperature
Storage temperature
Junction temperature
Symbol
VIN max
IO max
VSW
Pd max1
Pd max2
Topr
Tstg
Tj max
Conditions
Infinitely large heat sink.
Independent IC.
Ratings
Unit
30
V
3
A
-1
V
7.5
W
1.75
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
62707 MS PC 20070619-S00001 / N1306 MS PC 20060606-S00001 No.A0476-1/4