RT8032 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – 1.2MHz/1.2A Buck Converter with Programmable Average Input Current Limit

RT8032
1.2MHz/1.2A Buck Converter with Programmable Average
Input Current Limit
General Description
The RT8032 is a synchronous, step-down DC/DC converter
with input current limit function. The average input current
limit can be programmed by an external resistor. Its input
voltage range is from 3V to 5.5V and provides an adjustable
regulated output voltage from 0.8V to 5V while delivering
up to 1.2A of output current. The internal synchronous
low on-resistance power switches increase efficiency and
eliminate the need for an external Schottky diode. Current
mode operation with external compensation allows the
transient response to be optimized over a wide range of
loads and output capacitors.
The RT8032 is operated in forced continuous PWM Mode
which minimizes ripple voltage and reduces the noise and
RF interference. The 100% duty cycle in Low Dropout
Operation can maximize the battery life.
Ordering Information
RT8032
Package Type
QW : WDFN-12L 4x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Features
z Programmable Average Input Current Limit
z 3V to 5.5V Input Range
z 1.2A Output Current
z Up to 95% Efficiency
z 1.2MHz Switching Frequency
z No Schottky Diode Required
z Force Continues Mode Operation
z Low R_DS(ON) Internal Switches : 230mΩ
z Small 12-Lead WDFN Package
z External Compensation for Optimal Transient
Response
z External Soft-Start
z Input Over Voltage Protection
z RoHS Compliant and Halogen Free
Applications
z Distributed Power Systems
z Battery Charger
z DSL Modems
z Pre-Regulator for Linear Regulators
z 3G/3.5GData Card
Pin Configurations
(TOP VIEW)
SHDN/SS 1
NC 2
GND 3
SW 4
PGND 5
VOUT 6
12 FB
11 _COMP
10 ISET
9 VIN
8 VOUT
13 _{7 NC}
WDFN-12L 4x3
DS8032-02 March 2011
www.richtek.com
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