AIC1594 Datasheet, PDF (1/6 Pages) Analog Intergrations Corporation – 1A STEP-DOWN PWM REGULATOR

ADVANCED INFORMATION
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
! ^FEATURES
" Operating Input Voltage From 4.5V to 36V
" 2.5V, 3.3V, 5V , 12V and Adjustable Output Ver-
sion
" 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.
" Output Overvoltage Protection
" Current Limit and Thermal Shutdown Protection.
" 1A Guaranteed Output Current
! ^DESCRIPTION
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.
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.
! ^APPLICATIONS
" Simple High Efficiency Step-down regulator
" On-Card Switching regulators
The internal precious reference combined with
voltage feedback loop provides optimum output
voltage accuracy and fast load transient response.
Packages available are in standard SOT89-5
and DIP8 for standard assembly and TO263-5,
SOP8 for SMD.
! ^{TYPICAL APPLICATION CIRCUIT}
V_IN
+
C1
1
IN
2
OUT
C2
AIC1594


SHDN
FB ⁴
GND
3
L1
+
D1
C3
V_OUT
R1
R2 ^{R1 short and R2 open for fixed}
switching output version
1A Precision PWM DC/DC Regulator
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: [phone] FAX:[phone]
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