Technology Licensed from International Rectifier
APU3048
DUAL SYNCHRONOUS PWM CONTROLLER
CIRCUITRY AND LDO CONTROLLER
PRELIMINARY DATA SHEET
FEATURES
Dual Synchronous Controller in 16-Pin Package
with 1808 out-of-phase operation
LDO Controller with 40mA drive
Configured as 2-Independent PWM Controller
Flexible, Same or Separate Supply Operation
Operation from 4V to 25V Input
Internal 200KHz Oscillator
Soft-Start controls all outputs
Fixed Frequency Voltage Mode
500mA Peak Output Drive Capability
Programmable Outputs
RoHS Compliant
DESCRIPTION
The APU3048 IC combines a Dual synchronous Buck
controller and a linear regulator controller, providing a
cost-effective, high performance and flexible solution for
multi-output applications. The Dual synchronous con-
troller is configured as 2-independent PWM controller.
APU3048 provides a separate adjustable output by driv-
ing a switch as a linear regulator. This device features an
internal 200KHz oscillator, under-voltage lockout for all
input supplies, an external programmable soft start func-
tion as well as output under-voltage detection that latches
off the device when an output short is detected.
APPLICATIONS
DDR Memory Source Sink Vtt Application
Graphic Card
Hard Disk Drive
Power supplies requiring multiple outputs
TYPICAL APPLICATION
12V
5V
VcH1
Vcc
Q1
C1
R1
V
OUT3
C2
R2
C3
R3
Comp1
R4
Comp2
Fb3
V
OUT3
VcH2
HDrv1
1N4148
Q2
L1
V
OUT1
3.3V
LDrv1
Q3
C6
U1
APU3048
PGnd
R5
Fb1
Fb2
HDrv2
1N4148
R6
Q4
L2
V
OUT2
Q5
R7
C7
C4
LDrv2
SS
C5
Gnd
R8
Figure 1 - Typical application of APU3048 configured as 2-independent converter.
PACKAGE ORDER INFORMATION
T
A
(°C)
0 To 70
0 To 70
DEVICE
APU3048O
APU3048M
PACKAGE
16-Pin TSSOP
16-Pin SOIC NB
200308072-1/15
Data and specifications subject to change without notice.
A-POWER [ ADVANCED POWER ELECTRONICS CORP. ]
