RT8058A Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 1.2MHz, 2A, High Efficiency PWM Step-Down DC/DC Converter

RT8058A
1.2MHz, 2A, High Efficiency PWM Step-Down
DC/DC Converter
General Description
The RT8058A is a current mode PWM step-down converter.
The chip is ideal for fixed frequency and low ripple
applications over full range of load conditions. Its input
voltage range is from 2.6V to 5.5V with a constant 1.2MHz
switching frequency that allows it to adopt tiny, low cost
capacitors and inductors with 2mm or less in height making
it ideal for single-cell Li-lon/polymer battery applications.
The low on resistance internal MOSFET can achieve high
efficiency without the need of external schottky diodes in
wide operating ranges and the output voltage is adjustable
from 0.6V to 5V that can provide up to 2A load current.
The RT8058A operates at 100% duty cycle for low dropout
operation that extends battery life in portable devices.
The RT8058A is available in a WDFN-10L 3x3 package.
Features
z 0.6V Reference Allows Low Output Voltage
z Low Dropout Operation : 100% Duty Cycle
z 2A Load Current
z <2μA Shutdown Current
z Up to 95% Efficiency
z No Schottky Diode Required
z 1.2MHz Constant Switching Frequency
z Low R_DS(ON) Internal Switches
z Internally Compensated
z Internal Soft-Start
z Over temperature Protection
z Short Circuit Protection
z Small 10-Lead WDFN Package
z RoHS Compliant and Halogen Free
Ordering Information
RT8058A
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
P : Pb Free
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
E9= : Product Code
E9=YM
DNN
YMDNN : Data Code
Applications
z Portable Instruments
z Microprocessors and DSP Core supplies
z Cellular Telephones
z Wireless and DSL Modems
z Digital Cameras
z PC Cards
Pin Configurations
(TOP VIEW)
PGND 1
PGND 2
FB 3
GND 4
POK 5
GND
11
10 LX
9 LX
8 PVDD
7 VDD
EN
WDFN-10L 3x3
DS8058A-02 April 2011
www.richtek.com
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