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AP1501-3.3 PDF预览

AP1501-3.3

更新时间： 2024-05-23 22:22:46
品牌 Logo 应用领域
友台半导体 - UMW /
页数 文件大小 规格书
14页 2079K
描述
DC-DC芯片

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AP1501-3.3 数据手册

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R
UMW  
UMW AP1501  
FEATURES  
GENERAL DESCRIPTION  
The AP1501 series of regulators are monolithic integrated  
circuits that provide all the active functions for a step-down  
(buck) switching regulator, capable of driving a 3A load with  
excellent line and load regulation. These devices are available  
in fixed output voltages of 3.3V, 5V, 12V, and an adjustable  
output version.  
Requiring a minimum number of external components, these  
regulators are simple to use and include internal frequency  
compensation, and a fixed-frequency oscillator.  
The AP1501 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.  
Available in a standard 5-lead TO-220 package with several  
different lead bend options, and a 5-lead TO-263 surface mount  
package.  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
3.3V, 5V, 12V, and adjustable output versions  
Adjustable version output voltage range, 1.2V to 37V  
±4% max over line and load conditions  
Available in TO-220 and TO-263 packages  
Guaranteed 3A output load current  
Input voltage range up to 40V  
Requires only 4 external components  
Excellent line and load regulation specifications  
150 kHz fixed frequency internal oscillator  
TTL shutdown capability  
Low power standby mode, IQ typically 80 µA  
High efficiency  
Uses readily available standard inductors  
Thermal shutdown and current limit protection  
A standard series of inductors are available from several  
different manufacturers optimized for use with the AP1501  
series. This feature greatly simplifies the design of switch-mode  
power supplies.  
Other features include a guaranteed ±4% tolerance on output  
voltage under specified input voltage and output load  
conditions, and ±15% on the oscillator frequency. External  
shutdown is included, featuring typically 80 µA standby  
current. Self protection features include a two stage frequency  
reducing current limit for the output switch and an over  
temperature shutdown for complete protection under fault  
conditions.  
APPLICATIONS  
•
•
•
Simple high-efficiency step-down (buck) regulator  
On-card switching regulators  
Positive to negative converter  
TYPICAL APPLICATION (Fixed Output Voltage Versions)  
4
+V  
IN  
12V  
AP 1501  
5.0  
L1  
5.0V  
1
+
CIN  
2
+
COUT  
220  
5
3
µF  
680µ  
F
BLOCK DIAGRAM  
ON/OFF  
V
IN  
+
+
START  
UP  
+
COM  
-
2.5V  
-
COM  
+
FEEDBACK  
GM  
AMP  
+
R2  
-
-
LATCH  
DRIVER  
Active  
capacitor  
+
+
-
OUTPUT  
GND  
150kHz  
OSC  
www.umw-ic.com  
1
友台半导体有限公司  
1234567...14

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