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FSP3125S50E 参数 Datasheet PDF下载

FSP3125S50E图片预览
型号: FSP3125S50E
PDF下载: 下载PDF文件 查看货源
内容描述: 150KHZ , 2A PWM降压型DC / DC转换器 [150KHZ,2A PWM BUCK DC/DC CONVERTER]
分类和应用: 转换器
文件页数/大小: 9 页 / 273 K
品牌: FOSLINK [ FOSLINK SEMICONDUCTOR CO.,LTD ]
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150KHZ, PWM BUCK DC/DC CONVERTER
2A
FSP3125
FEATURES
Output voltage: 3.3V, 5V, 12V and adjustable
output version
Adjustable version output voltage range, 1.23V to
18V ± 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 22V
Output load current: 2A
SOP8L packages
Low power standby mode
Built-in switching transistor on chip
GENERAL DESCRIPTION
T
he FSP3125 series are monolithic IC designed for a
Typical Application
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
step-down DC/DC converter, and own the ability of
driving a 2A load without additional transistor. It saves
board space. The external shutdown function can be
controlled by logic level and then come into standby
mode. The internal compensation makes feedback
control having 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. If current
limit function occurs and FB is down below 0.5V, the
switching frequency will be reduced. The FSP3125
series operates at a switching frequency of 150KHz
thus allow 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 chips are
available in a standard SOP8L package.
PIN ASSIGNMENT
(Top View)
VIN 1
OUTPUT 2
FB
3
8 GND
7 GND
FSP3125
6
5
GND
GND
SD 4
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
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2007-3-27