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PDF FSP3122 Data sheet ( Hoja de datos )
| Número de pieza | FSP3122 | |
| Descripción | 150KHZ 3A PWM BUCK DC/DC CONVERTER | |
| Fabricantes | FOSLINK SEMICONDUCTOR | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FSP3122 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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150KHZ 3A PWM BUCK DC/DC CONVERTER
FEATURES
z Output voltage: 3.3V, 5.0V, 12V, and adjustable
output version
z Adjustable version output voltage range:1.23V to
37V±4%
z 150KHz±15% fixed switching frequency
z Voltage mode non-synchronous PWM control
z Thermal-shutdown and current-limit protection
z ON/OFF shutdown control input
z Operating voltage can be up to 40V
z Output load current: 3A
z Low power standby mode
z Built-in switching transistor on chip
z TO220-5L，TO252-5L and TO263-5L packages
APPLICATIONS
z Simple High-efficiency step-down regulator
z On-card switching regulators
z Positive to negative converter
PIN CONFIGURATION
(1) TO220-5L
(Top View)
FSP3122
GENERAL DESCRIPTION
The FSP3122 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 FSP3122 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
1/10 2007-6-12
1 page  
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
www.DataSheet4U.com
150KHZ 3A PWM BUCK DC/DC CONVERTER
FSP3122
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
5/10 2007-6-12
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet FSP3122.PDF ] | |
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