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LA5756 Datasheet

Separately-excited Step-down Switching Regulator

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Ordering number : ENA1438B
LA5756
Monolithic Linear IC
Separately-excited Step-down
Switching Regulator
(Variable Type)
http://onsemi.com
Overview
The LA5756 is a separately-excited step-down switching regulator (variable type).
Features
Output smoothing condenser can use a Low ESR condenser for the reliability improvement
High efficiency
Four external parts
Time-base generator (80kHz) incorporated
Current limiter incorporated
Thermal shutdown circuit incorporated
Soft start circuit incorporated
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Input voltage
Output current
SW pin application reverse
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VIN max
IO max
VSW
Pd max1
Pd max2
Topr
Tstg
Conditions
Infinite heat sink.
No heat sink.
Ratings
34
3.5
-1
7.5
1.75
-30 to +125
-40 to +150
Unit
V
A
V
W
W
°C
°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
4.5 to 32
Unit
V
Semiconductor Components Industries, LLC, 2013
August, 2013
62409 SY 20090611-S00001 / 41509 MS / 40809 MS 20090326-S00003 No.A1438-1/4


  ON Semiconductor Electronic Components Datasheet  

LA5756 Datasheet

Separately-excited Step-down Switching Regulator

No Preview Available !

LA5756
Electrical Characteristics at Ta = 25°C, VO = 3.3V
Parameter
Symbol
Conditions
Reference voltage
Efficiency
VOS
η
Switching frequency
f
Line regulation
Load regulation
Output voltage temperature coefficient
Ripple attenuation factor
ΔVOLINE
ΔVOLOAD
ΔVO/ΔTa
RREJ
Current limiter operating voltage
IS
Thermal shutdown operating temperature TSD
Thermal shutdown hysteresis width
ΔTSD
* Designed target value: No measurement made.
VIN = 15V, IO = 1.0A
VIN= 8 to 20V, IO=1.0A
VIN = 15V, IO = 0.5 to 1.5A
Designed target value*
f = 100 to 120Hz
VIN = 15V
Designed target value*
Designed target value*
min
1.235
60
4.2
Ratings
typ
1.26
78
80
40
10
±0.5
45
165
15
max
1.285
100
100
30
Unit
V
%
kHz
mV
mV
mV/°C
dB
A
°C
°C
Package Dimensions
unit : mm (typ)
3376
10.4 MAX
3.6 10.0
4.5
1.3
0.9
12 5
(1.6) 1.7
0.8
0.4
3.15
7.05
Pd max -- Ta
10.0
8.0 100×100×1.5mm3
7.5
Infinite heat sink θjc=5°C
6.0 50×50×1.5mm3
5.6
4.0 30×30×1.5mm3
3.3
2.0 No heat sink
1.75
Al heat
sink
mounting
torque
39Ncm
silicone
grease
applied
0
-30 -20
0 20 40 60 80 100 120 140 160
Ambient temperature, Ta -- °C MSG07021
SANYO : 220-5HMDB
Pin Assignment
(1)VIN (2)SWOUT (3)GND (4)VOS (5)SS
No.A1438-2/4


Part Number LA5756
Description Separately-excited Step-down Switching Regulator
Maker ON Semiconductor
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LA5756 Datasheet PDF





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