ADVANCED INFORMATION
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
DESCRIPTION
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FEATURES
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Operating Input Voltage From 4.5V to 36V
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The AIC1594 series are step-down monolithic
PWM regulators delivering 1A at fixed voltages of
2.5V , 3.3V, 5.0V , 12V and using a external di-
vider to adjust output voltage from 1.25V to 30V
with excellent line and load regulation.
2.5V, 3.3V, 5V , 12V and Adjustable Output Ver-
sion
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Adjustable Version Output Voltage Range , 1.25V
"
to 30V ± 4% max Over Line and Load Regulation
Available in TO220-5 and TO263-5 Package
Requires Only 4 External Components.
150KHz/300KHz Fixed Constant Frequency
Low Power Standby Mode, IQ Typically 80µA
TTL Shutdown Capability.
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Switching frequency up to 150KHz/300KHz are
achievable thus allowing smaller sized filter com-
ponents. Internal current limit and thermal shut-
down circuits provide protection from overloads. It
also provides output overvoltage and short pro-
tection under fault conditions.
Output Overvoltage Protection
Current Limit and Thermal Shutdown Protection.
1A Guaranteed Output Current
The internal precious reference combined with
voltage feedback loop provides optimum output
voltage accuracy and fast load transient response.
APPLICATIONS
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Simple High Efficiency Step-down regulator
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Packages available are in standard SOT89-5
and DIP8 for standard assembly and TO263-5,
SOP8 for SMD.
On-Card Switching regulators
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TYPICAL APPLICATION CIRCUIT
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2
1
IN
OUT
V
L1
IN
+
V
OUT
+
C2
AIC1594
C3
C1
D1
ꢀ
4
FB
SHDN
R1
GND
3
R1 short and R2 open for fixed
switching output version
R2
1A Precision PWM DC/DC Regulator
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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