DC-DC Converter. LSP3120 Datasheet

LSP3120 Datasheet PDF, Equivalent


Part Number

LSP3120

Description

3A PWM Buck DC-DC Converter

Manufacture

Lite-On

Total Page 9 Pages
PDF Download
Download LSP3120 Datasheet PDF


LSP3120 Datasheet
Liteon Semiconductor Corporation
LSP3120
52KHZ 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%
52KHz±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,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 LSP3120 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 LSP3120 series operates at a
switching frequency of 52 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 TO-263 package.
(2) TO263-5L
(Top View)
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
Metal Tab Gnd
Metal Tab Gnd
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
1/9 Rev1.0
Free Datasheet http://www.datasheet4u.com/

LSP3120 Datasheet
Liteon Semiconductor Corporation
LSP3120
52KHZ 3A PWM Buck DC/DC Converter
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VSD
VFB
VOUT
PD
TST
TOP
VOP
Paramrter
Supply Voltage
ON/OFF Pin input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature
Operating Temperature
Operating Voltage
Rating
+45
-0.3 to +25
-0.3 to +25
-1
Internally Limited
-65 to +150
-40 to +125
+4.5 to +40
Unit
V
V
V
V
W
V
2/9 Rev1.0
Free Datasheet http://www.datasheet4u.com/


Features Datasheet pdf Liteon Semiconductor Corporation LSP3120 52KHZ 3A PWM Buck DC/DC Converter FEAT URES Output voltage: 3.3V, 5.0V, 12V, a nd adjustable output version Adjustable version output voltage range:1.23V to 37V±4% 52KHz±15% fixed switching freq uency Voltage mode non-synchronous PWM control Thermal-shutdown and current-li mit protection ON/OFF shutdown control input Operating voltage can be up to 40 V Output load current: 3A Low power sta ndby mode Built-in switching transistor on chip TO220-5L,TO263-5L packages GE NERAL DESCRIPTION The LSP3120 series ar e monolithic IC that design for a step- down DC/DC converter, and own the abili ty of driving a 3A load without additio nal transistor component. Due to reduci ng the number of external component, th e board space can be saved easily. The external shutdown function can be contr olled by logic level and then come into standby mode. The internal compensatio n makes feedback control have good line and load regulation without external design. Regarding protected.
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