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Power Converter. AE2596 Datasheet |
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SIMPLE SWITCHER POWER CONVERTE
AE2596
AE2596
● General Description
The AE2596 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 AE2596 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.
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 80µA 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.
● Features
3.3V, 5V, 12V, and adjustable output versions
Adjustable version output voltage range,1.2V to 32V
TO-220-5L and TO-263-5L packages
Output load current 3A
Input voltage range up to 40V
Requires only 4 external components
150 kHz fixed frequency internal oscillator
TTL shutdown capability
Low power standby mode, IQ typically 80 µA
High efficiency
Thermal shutdown and current limit protection
● Application
Simple high-efficiency step-down (buck) regulator
On-card switching regulators
Positive to negative converter
Oct, 2006 V2.0
Chengdu Chip-Rail. Tech. Co., Ltd.
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● Pin Description
Pin No.
Symbol
Parameter
1
VIN
DC Input
2
Output
DC Output
3
GND
Ground
4
Feedback
Feedback signal
AE2596
5
Standby control
5-LeadTO-220(B)
● Block Diagram
5-Lead TO-220(T)
ON/OFF
5
5-Lead TO-263(S)
CURRENT
SOURCE
BIAS
1.235V
2.5V
REFERENCE REGULATOR
START
UP
CURRENT
LIMIT
4
R2
R1=2.5K
GM
AMP
2.5V
COMP
LATCH
DRIVER
3.3V, R2=4.2K
5V, R2=7.6K
12V, R2=21.8K
ADJ, R2=0, R1=OPEN
150KHz
OSC
RESET
THERMAL
LIMIT
Oct, 2006 V2.0
Chengdu Chip-Rail. Tech. Co., Ltd.
1
2
3
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● Absolute Maximum Rating
Parameter
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
Conditions Temperature Range
Supply Voltage
Rating
40
-0.3 25
-0.3 25
Internally limited
-65 150
150
-40 125
4.75 36
AE2596
Unit
V
V
V
--
V
● Electrical Characteristics
VOUT=3.3V
Symbol Parameter Conditions
Min Typ Max
(Note 4) (Note 3) (Note4 ) Units
VOUT
Output
Voltage
VOUT=5V
VOUT
Efficiency
Output
Voltage
VOUT=12V
VOUT
Efficiency
Output
Voltage
Efficiency
Vout is adjustable
VFB
Feedback
Voltage
5V VIN 36V
0.2A ILOAD 3A
VIN=12V ILOAD=3A
7V VIN 36V
0.2A ILOAD 3A
VIN=12V ILOAD=3A
15V VIN 36V
0.2A ILOAD 3A
VIN=25V ILOAD=3A
4.5V VIN 36V
0.2A ILOAD 3A
VOUT programmed
for 3V.
3.18
--
4.80
--
11.52
--
1.195
3.30
72
5.0
79
12.0
88
1.230
3.40
--
5.20
--
12.48
---
1.255
V
%
V
%
V
%
V
VIN=12V
Efficiency
-- 71 -- %
VOUT=3V ILOAD=3A
Oct, 2006 V2.0
Chengdu Chip-Rail. Tech. Co., Ltd.
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