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LSP3127 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 LSP3127
기능 52KHZ 2A PWM Buck DC/DC Converter
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LSP3127 데이터시트, 핀배열, 회로
Liteon Semiconductor Corporation
LSP3127
52KHZ 2A 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: 2A
Low power standby mode
Built-in switching transistor on chip
SOP8-EP package
APPLICATIONS
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
GENERAL DESCRIPTION
The LSP3127 series are monolithic IC that design for
a step-down DC/DC converter, and own the ability of
driving a 2A 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 LSP3127 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 package is
available in a standard SOP8-EP package.
PIN CONFIGURATION
SOP8-EP
(Top View)
PIN DESCRIPTION
Name
VIN
OUTPUT
FB
SD
GND
GND
GND
GND
No.
1
2
3
4
5
6
7
8
Description
Operating Voltage Input
Switching Output
Output Voltage Feedback Control
On/Off Shutdown
Ground
Ground
Ground
Ground
Please be aware that an Important Notice concerning availability, disclaimers, and use in critical
applications of LSC products is at the end of this document.
1/9 Rev1.2




LSP3127 pdf, 반도체, 판매, 대치품
Liteon Semiconductor Corporation
LSP3127
52KHZ 2A PWM Buck DC/DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Saturation Voltage
1.60 1:-40
1.40
2:25
3:125
VIN=12V
1.20
1.00
1
0.80 2
0.60 3
0.5 1 2 3
SWITCH CURRENT(A)
Switching Frequency
160
155
150
145
140
135
130
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE()
ON/OFF Threshold Voltage
2.5
2.0
4/9
Switch Current Limit
Rev1.2
5.50
VIN=12V Vout=5V

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LSP3127 전자부품, 판매, 대치품
Liteon Semiconductor Corporation
LSP3127
52KHZ 2A PWM Buck DC/DC Converter
ORDERING INFORMATION
MARKING INFORMATION
7/9 Rev1.2

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