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ANPEC

APW7060 Datasheet Preview

APW7060 Datasheet

Dual Controllers - Step Down Synchronous PWM and Linear Controller

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APW7060
Dual Controllers - Step Down Synchronous PWM and Linear Controller
Features
General Description
Provides Two Regulated Voltages
- One Synchronous DC/DC Buck Controller
- One Linear Controller
0.8V Internal Reference Voltage
- Both Controllers: 0.8V ± 2% Line, Load
and Temp.
Output Voltage Range
- PWM Controller : 0.8V to VIN
- Linear Controller : 0.8V to (12VCC-V )
GSpass
Full Duty Cycle Range for PWM Controller
- 0% to 100%
Internal Loop Compensation for PWM Controller
Internal 2ms Soft Start and Short Circuit Protec
tion for both Controllers
Both Controllers Drive N-Channel MOSFETs
Small Converter Size
- 600kHz Constant Switching Frequency
- Simple SO-14 Package
Shutdown Control
Applications
Motherboard
Graphics Cards
12V, 5V and 3.3V Inputs DC-DC Converter
DSP Supplies
Embedded processor and I/O supplies
The APW7060 integrates a synchronous buck PWM
controller and a linear controller to provide two regu-
lated voltages in a single package. The PWM control-
ler drives external N-channel MOSFETs and operates
at a fixed 600kHz frequency. When the input supply
drops close to the output, the upper MOSFET remains
on, achieving 100% duty cycle. Internal loop compen-
sation is optimized for fast transient response, elimi-
nating external compensation network. The linear con-
troller drives an external N-channel MOSFET to form a
linear regulator. The internal 0.8V reference makes this
part suitable for a wide variety of low voltage
applications.
The APW7060 has an undervoltage lockout circuitry
to ensures that both the 5VCC and 12VCC must be
present before its internal circuitry is power up. Soft
start is internally set to 2ms and will bring both out-
puts into regulation in a controlled manner. When ei-
ther output goes into short, soft start will be initiated.
If the short condition still remains after three cycles,
both regulators will be shut down. To restart both
regulators, recycle the voltage at 5VCC or 12VCC pin
or momentarily pull the FB2 pin above 1.28V.
The APW7060 can be shutdown by pulling the FB2
pin above 1.28V. In shutdown, all gate drive signals
will be low. This dual controller is available in SO-14
package.
Pinouts
LGATE
GND
GND
5VCC
DRIVE2
FB2
NC
1
2
3
4
5
6
7
14 UGATE
13 12VCC
12 NC
11 NC
10 NC
9 FB
8 NC
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp.
Rev. A.3 - Oct., 2003
1
www.anpec.com.tw




ANPEC

APW7060 Datasheet Preview

APW7060 Datasheet

Dual Controllers - Step Down Synchronous PWM and Linear Controller

No Preview Available !

APW7060
Ordering and Marking Information
APW 7060
APW 7060 K :
H a nd lin g C o d e
Temp. Range
Package Code
APW 7060
XXXXX
Package Code
K : SO P-14
O perating Junction T em p. R ange
C : 0 to 70°C
H andling C ode
TU : Tube
TR : Tape & Reel
XXXXX - D ate C ode
Block Diagram
5VCC
12VCC
Under
Voltage
Lockout
UVLO
0.5V
UVP1
Soft-Start
and Fault
Logic
PW M
Gate
Control
5VCC
UGATE
LGATE
FB
VREF
0.8V
Inhibit /
S o ft-S ta rt
COMP
Error
A m plifier
UVP2
Shutdown
Oscillator
FOSC
600kHz
0.5V
1.28V
12VCC
Linear
Controller
FB2
DRIVE2
GND
.ECKH/Figure 1.
Copyright ANPEC Electronics Corp.
Rev. A.3 - Oct., 2003
2
www.anpec.com.tw


Part Number APW7060
Description Dual Controllers - Step Down Synchronous PWM and Linear Controller
Maker ANPEC
Total Page 16 Pages
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