AP2011
Synchronous PWM with VFC Controller
Features
- Single 10V to 40V Supply Application
- 1.25V + 2.0% Voltage Reference
- Virtual Frequency Control
TM
.
- Fast Transient Response.
- Synchronous Operation for High Efficiency
- Current Limit Function.
- Small Size with Minimum External Components
- Soft Start and Shutdown Functions
- Industrial Temperature Range
- Under Voltage Lockout Function
- SOP-14L
Pb-Free
Package
General Description
The AP2011 is a low-cost, full featured,
synchronous voltage-mode controller designed for
use in single ended power supply applications
where efficiency is of primary concern.
Synchronous operation allows for the elimination of
heat sinks in many applications. The AP2011 is
ideal for implementing DC/DC converters needed to
power advanced microprocessors in low cost
systems or in distributed power applications where
efficiency is important. Internal level-shift, high-side
drive circuitry, and preset shoot-thru control, allows
the use of inexpensive 1P+1N-channel power
switches.
AP2011’s features include temperature ompensated
voltage reference,
Virtual Frequency
Control
TM
method
to reduce external component count,
an internal virtual
frequency 200KHz oscillator, under-voltage lockout
protection, soft-start, shutdown function and current
sense comparator circuitry.
Virtual Frequency Control is a trademark of
PWRTEK, LLC.
Applications
- Microprocessor Core Supply
- Low Cost Synchronous Applications
- Voltage Regulator Modules (VRM)
- Networking Power Supplies
- Sequenced Power Supplies
- Telecommunication Power Supplies.
Pin Assignments
(Top View)
PGATE
VCC
PVCC
PDRV
PGND
NGATE
VIN
1
2
3
5
6
7
14
13
12
10
Pin Descriptions
Pin Name
VREF
PHASE
SGND
OCSET
FB
SS/SHDN
CAP
4
AP2011
11
9
8
PGATE
VCC
PVCC
PDRV
PGND
NGATE
VIN
CAP
SS/
SHDN
FB
OCSET
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
Level shift-gate driver
Internal regulator voltage
Power VCC
PMOS Gat driver
Power Ground
Low side driver output (N
MOSFET)
Chip supply voltage
Charge pump pin
Soft start, a capacitor to
ground sets the slow start
time/set low for shutdown
function.
Feedback input
Sets the converter
over-current trip point
Signal Ground
Input from the phase node
between the MOSFETs
Reference voltage
SOP-14L
Ordering Information
AP2011 X
Package
S: SOP-14L
X
Packing
Blank : Tube
A : Taping
SGND
PHASE
VREF
Anachip Corp
www.anachip.com.tw
1/9
Rev. 1.1 Apr 1, 2005
ANACHIP [ ANACHIP CORP ]
