APW7016 Datasheet, PDF (1/11 Pages) Anpec Electronics Coropration – Advanced PWM Power Controller

APW7016
Advanced PWM Power Controller
Features
General Description
• Simple Single-Loop Control Design
−Voltage-Mode PWM Control
• Excell Output Voltage Regulation
−PWM Output : ±1% Over Temperautre
• Fast Transient Response
−High-Bandwidth Error Amplifier
−Full 0% to 100% Duty Ratio
• 3-Bit Digital-to-Analog Output Voltage Selection
• Over-Voltage and Over-Current Fault Monitors
• Small Converter Size
−200kHz Free-Running Oscillator
−Programmable from 50KHz to 800KHz
Applications
• High-Power 5V to 3.xV (or below) DC-DC Regu-
lators
• Low-Voltage Distributed Power Supplies
• VGA Card Power Regulation
The APW7016 provides a complete control and pro-
tection for a DC-DC converter optimized for high per-
formance microprocessor applications. It is designed
to drive two N-Channel MOSFETs in a synchronous-
rectified buck topology. The APW7016 integrates
output voltage control , monitoring and protection
functions into a single Package.
The APW7016 includes a 3-bit digital-to-analog con-
verter (DAC) that provides a easily adjustable and
precisely output voltage from 1.3V_DC to 1.65V_DC in
0.05V steps. Any selected output voltage can be
maintained within ±1% accuracy over temperature
and line voltage variations.
With a 200kHz free-running triangle-wave oscillator
and a error amplifier featuring a 15MHz unity-gain
bandwidth and 6V/us slew rate inside the chip ,
APW7016 can implement a simple , single feedback
loop , voltage-mode control topology with high tran-
sient performance.
The APW7016 also features with multiple protections
against over-current and over-voltage conditions by
inhibiting PWM operation. The APW7016 uses the
R_DS(ON) of the upper MOSFET as the current sensing
element which eliminates the demend for an extra
component. The APW7016 also monitors the output
voltage using a comparator with hysteresis that tracks
the DAC output.
Pin Description
VSEN ¹
OCSET 2
SS 3
VID0 4
VID1 5
VID2 6
COMP 7
FB 8
16 RT
15 VCC
14 LGATE
13 PGND
12 BOOT
11 UGATE
10 PHASE
9 GND
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.
1
Rev. A.2 - Oct., 2002
www.anpec.com.tw