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  Richtek Technology Electronic Components Datasheet  

RT8012A Datasheet

Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters

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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
www.DataSthoee5t4VU. .Icnotmernal 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 RDS(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
12 FB1
PVDD2
PVDD2
PGND
2
3
4
PGND
11 EN1
10 VDD
9 PVDD1
5678
WQFN-16L 4x4
DS8012A-01 March 2007
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8012A Datasheet

Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters

No Preview Available !

RT8012A
Typical Application Circuit
Preliminary
VIN
5V
PGOOD2
Chip Enable
www.DataSheet4U.com
VOUT2
1.2V/1.5A
R1
100k
C1
10uF
2, 3 10 9
1 PGOOD2
13
PGOOD1
15 EN2
L1 2.2uH 5, 6 LX2
R3 100k 15 FB2
RT8012A
EN1 11
LX1 7
12
FB1
C2
10uF
R2
100k
PGOOD1
Chip Enable
L2 3.3uH
R6 625k
VOUT1
3.3V/1.0A
C3
22uF
R4
200k
14 4
R5
200k
C4
10uF
Figure 1. Dual Output 3.3V and 1.2V Step Down Regulators
VIN
5V
PGOOD2
VOUT2
1.2V/1.5A
C5
0.1uF
R1
100k
C1
10uF
2, 3 10 9
1 PGOOD2
PGOOD1 13
15 EN2
L1 2.2uH 5, 6 LX2
R2 100k 15 FB2
RT8012A
EN1 11
LX1 7
FB1 12
C2
10uF
L2 3.3uH
R5 625k
C3
22uF
R3
200k
14 4
R4
200k
Chip Enable
VOUT1
3.3V/1.0A
C4
10uF
Figure 2. Dual Output 3.3V and 1.2V Step Down Regulators (Power up sequence is 3.3V first and then 1.2V).
www.richtek.com
2
DS8012A-01 March 2007


Part Number RT8012A
Description Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters
Maker Richtek
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RT8012A Datasheet PDF






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