AP2011 Datasheet, PDF (1/9 Pages) Anachip Corp – Synchronous PWM with VFC Controller

Synchronous PWM with VFC Controller
AP2011
„ 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
„ 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 ¹
14 _VREF
VCC ²
13 _PHASE
PVCC ³
12 SGND
PDRV ^{4 AP2011 11} OCSET
PGND ⁵
10 FB
NGATE ⁶
9 _SS/SHDN
VIN ⁷
8 CAP
SOP-14L
„ Ordering Information
AP2011 X X
Package
S: SOP-14L
Packing
Blank : Tube
A : Taping
„ 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.
„ Pin Descriptions
Pin Name
Pin
No.
Description
PGATE
1 Level shift-gate driver
VCC
2 Internal regulator voltage
PVCC
3 Power VCC
PDRV
4 PMOS Gat driver
PGND
5 Power Ground
NGATE
6
Low side driver output (N
MOSFET)
VIN
7 Chip supply voltage
CAP
8 Charge pump pin
Soft start, a capacitor to
SS/ SHDN
9
ground sets the slow start
time/set low for shutdown
function.
FB
10 Feedback input
OCSET
11
Sets the converter
over-current trip point
SGND
12 Signal Ground
PHASE
13
Input from the phase node
between the MOSFETs
VREF
14 Reference voltage
Anachip Corp
www.anachip.com.tw
Rev. 1.1 Apr 1, 2005
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