AP2004 Datasheet, PDF (1/8 Pages) Anachip Corp – PWM Buck Controller

PWM Buck Controller
„ Features
- PWM Buck Control Circuitry
- Operating voltage can be up to 27V
- Under voltage Lockout (UVLO) Protection
- Short Circuit Protection (SCP)
- Soft-start circuit
- Variable Oscillator Frequency -- 300Khz Max
- 1.25V voltage reference Output
- 8-pin PDIP and SOP packages
„ Applications
- Backlight inverter
- LCD Monitor
- XDROM, XDSL Product
- DC/DC converters in computers, etc.
„ Pin Assignment
( Top View )
OUT 1
VCC ²
COMP ³
FB ⁴
8 GND
7 _CT
6 _SS
5 SCP
PDIP/SOP
„ Ordering Information
AP2004
„ General Description
The AP2004 integrates Pulse-Width-Modulation
(PWM) control circuit into a single chip, mainly
designs for power-supply regulator. All the functions
include an on-chip 1.25V reference output, an error
amplifier, an adjustable oscillator, a soft-start,
UVLO, SCP circuitry, and a push-pull output circuit.
Switching frequency is adjustable by trimming CT.
During low VCC situation, the UVLO makes sure
that the outputs are off until the internal circuit
operates normally.
„ Pin Descriptions
Name
CT
FB
SS
COMP
OUT
GND
VCC
SCP
Description
Timing Capacitor
Voltage Feedback
Soft-Start.
Feedback Loop Compensation
PWM Output
Ground
Supply Voltage
Short Circuit Protection
AP2004 X X X
Package
Lead Free
Packing
N: PDIP-8L Blank : Normal
Blank : Tube
S: SOP-8L L : Lead Free Package A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.4 Arpr 6, 2004
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