AIC2511 Datasheet, PDF (1/13 Pages) Analog Intergrations Corporation – 3A STEP-DOWN PWM CONVERTER

AIC2511
3A STEP-DOWN PWM CONVERTER
FEATURES
Operating Input Voltage From 4.5V to 24V
3.3V, 5V, 12V and Adjustable Output Version
Adjustable Version Output Voltage Range,
1.25V to 24V ± 4% max Over Line and Load
Regulation
Available in TO-263-5, TO-220-5, TO-220B
and TO-252-5 Package
Requires Only 4 External Components.
150KHz Fixed Constant Frequency
Low Power Standby Mode, I_Q Typically 80µA
TTL Shutdown Capability.
Current Limit and Thermal Shutdown
Protection.
3A Guaranteed Output Load Current
APPLICATIONS
Fixed Voltage power supply for LCD Monitor
and LCD TV
On-Card Switching regulators
Simple High Efficiency Step-down regulator
GENERAL DESCRIPTION
The AIC2511 series are step-down monolithic
PWM converters for delivering 3A at fixed
voltages of 3.3V, 5.0V, 12V and using an
external divider to adjust output voltage from
1.25V to 24V with excellent line and load
regulation.
Switching frequency up to 150KHz is
achievable thus allowing smaller-sized filter
components. Internal current limit and thermal
shutdown circuits provide protection from
overloads. The internal precise reference
combined with voltage feedback loop provides
optimum output voltage accuracy and fast load
transient response.
TYPICAL APPLICATION CIRCUIT
V_IN
+
C1
AIC2511
1
IN
2
OUT
5 _ON/OFF
4
FB
GND
3
L1
D1
+
C2
V_OUT
CF
R1
C1: electrolyte capacitor 470uF
C2: electrolyte capacitor 220uF
CF:refer to table1
D1: SK54
L1:33uH
R2
R1 short, R2 and CF open for fixed version
Analog Integrations Corporation 3A1, No.1 Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan
TEL: [phone]
FAX: [phone] www.analog.com.tw
DS-2511P-02 071607
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