RT8012A Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters

Preliminary
RT8012A
Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters
General Description
The RT8012A is a dual PWM, current mode, stepdown
converter. Its input voltage range is from 2.6V to 5.5V and
has a constant 1.2MHz switching frequency, allowing the
use of tiny, low cost capacitors and inductors 2mm or
less in height. Each output voltage is adjustable from 0.8V
to 5V. Internal power switches with low on-resistance of
the dual step-down regulators increase efficiency and
eliminate the need for external Schottky diodes. The
RT8012A can run at 100% duty cycle for low dropout
operation that extends battery life in portable systems.
With independent Enable and Power-Good pins, it is easy
to control the power up sequence of the two converters,
which is important in some applications.
Ordering Information
RT8012A
Package Type
QW : WQFN-16L 4x4 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Comme-
rcial Standard)
Note :
RichTek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Features
z High Efficiency : Up to 95%
z 1.2MHZ Constant Switching Frequency
z 1A and 1.5A Load Current on Each Channel
Respectively
z Low R_DS(ON) Internal Switches
z No Schottky Diode Required
z 0.8V Reference Allows Low Output Voltage
z Low Dropout Operation : 100% Duty Cycle
z Internally Compensated
z < 2μA Shutdown Current
z Power Good Output Voltage Monitor
z Internal Soft-Start
z Easy Power Sequence Control
z Over temperature Protection
z Short Circuit Protection
z Thermally Enhanced 16-Lead WQFN Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Portable Instruments
z Microprocessors and DSP Core Supplies
z Cellular Phones
z Wireless and DSL Modems
z PC Cards
z Digital Cameras
Pin Configurations
(TOP VIEW)
16 15 14 13
PGOOD2 1
PVDD2 2
PVDD2 3
PGND 4
PGND
12 FB1
11 EN1
10 VDD
9 PVDD1
5678
WQFN-16L 4x4
DS8012A-01 March 2007
www.richtek.com
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