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PDF LSP3122 Data sheet ( Hoja de datos )
| Número de pieza | LSP3122 | |
| Descripción | 150KHZ 3A PWM Buck DC/DC Converter | |
| Fabricantes | Lite-On | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LSP3122 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Liteon Semiconductor Corporation
LSP3122
150KHZ 3A PWM Buck DC/DC Converter
FEATURES
Output voltage: 3.3V, 5.0V, 12V, and adjustable
output version
Adjustable version output voltage range:1.23V to
37V±4%
150KHz±15% fixed switching frequency
Voltage mode non-synchronous PWM control
Thermal-shutdown and current-limit protection
ON/OFF shutdown control input
Operating voltage can be up to 40V
Output load current: 3A
Low power standby mode
Built-in switching transistor on chip
TO220-5L TO252-5L and TO263-5L packages
APPLICATIONS
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
PIN CONFIGURATION
(1) TO220-5L
(Top View)
GENERAL DESCRIPTION
The LSP3122 series are monolithic IC that design for
a step-down DC/DC converter, and own the ability of
driving a 3A load without additional transistor
component. Due to reducing the number of external
component, the board space can be saved easily.
The external shutdown function can be controlled by
logic level and then come into standby mode. The
internal compensation makes feedback control have
good line and load regulation without external design.
Regarding protected function, thermal shutdown is to
prevent over temperature operating from damage,
and current limit is against over current operating of
the output switch. The LSP3122 series operates at a
switching frequency of 150 KHz thus allowing smaller
sized filter components than what would be needed
with lower frequency switching regulators. Other
features include a guaranteed ±4% tolerance on
output voltage under specified input voltage and
output load conditions, and ±15% on the oscillator
frequency. The output version included fixed 3.3V,
5V, 12V, and an adjustable type. The packages are
available in a standard 5-lead TO-220 package
5-lead TO252 package and a 5-lead TO-263
package.
(2) TO252-5L
(Top View)
Metal Tab Gnd
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
5
4
3
2
1
Metal Tab GND
SD
FB
GND
OUTPUT
VIN
(3) TO263-5L
(Top View)
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
Symbol
1
2
3
4
5
Name
Vin
Output
Gnd
FB
SD
Descriptions
Operating Voltage Input
Switching Output
Ground
Output Voltage Feedback Control
ON/OFF Shutdown
Metal Tab Gnd
1/11 Rev1.2
1 page  
Liteon Semiconductor Corporation
LSP3122
150KHZ 3A PWM Buck DC/DC Converter
ON/OFF Threshold Voltage
2.5
2.0 OFF
1.5
1.0
0.5 ON
0.0
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE( )
TYPICAL APPLICATION CIRCUITS
(1) Fixed Output Circuit
5.50
5.00
4.50
Switch Current Limit
VIN=12V Vout=5V
4.00
3.50
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE( )
(2) Adjustable Output Circuit
Vout=VFB*(1+R1/R2); VFB=1.23V; R2=1K typical
5/11 Rev1.2
5 Page 
(3) TO252-5L
Liteon Semiconductor Corporation
LSP3122
150KHZ 3A PWM Buck DC/DC Converter
A
D
D1 c1
A1
e
e1
b
c
Symbol
A
A1
b
c
c1
D
D1
E
e
e1
L1
L2
L3
V
Dimensions In Millimeters
Min.
2.200
Max.
2.400
0.000
0.127
0.400
0.600
0.430
0.580
0.430
0.580
6.350
6.650
5.200
5.400
5.400
5.700
1.270TYP.
2.540TYP.
9.500
9.900
1.400
1.780
2.550
2.900
3.800REF
Dimensions In Inches
Min.
0.087
Max.
0.094
0.000
0.005
0.016
0.024
0.017
0.023
0.017
0.023
0.250
0.262
0.205
0.213
0.213
0.224
0.050TYP.
1.000TYP.
0.374
0.390
0.055
0.070
0.100
0.114
0.150REF
11/11
Rev1.2
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LSP3122.PDF ] | |
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