ANPEC APW7036-20KC-TR, APW7036-18KC-TU, APW7036-18KC-TR, APW7036-15KC-TU, APW7036-12KC-TR Datasheet

Copyright  ANPEC Electronics Corp.
Rev. A.1 - May, 2001

APW7036

www.anpec.com.tw1

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.

Advanced Dual PWM Power Controller

••

••

•

2 Regulated Voltage are provided

− SYNC Switching Power Internal Reference

Voltage (1.25V , 1.5V , 1.8V and 2.05V)

− ASYNC Switching Power Internal Reference

Voltage (1.5V)

••

••

•

Simple Single-Loop Control Design

− V oltage-Mode PWM Control

••

••

• Excellent Output Voltage Regulation

− SYNC Output : ±1% Over Temperature

− ASYNC Output : ±3% Over Temperature

••

••

• Fast Transient Response

− High-Bandwidth Error Amplifier

− Full 0% to 100% Duty Ratio

••

••

• Power-Good Output Voltage Monitor

••

••

• Over-Voltage and Over-Current Fault Monitors

••

••

• Small Converter Size

− Constant Frequency Operation(200kHz)

− Programmable Oscillator from 50kHz to 800kHz

− Reduce External Component Count

••

••

• 20Pin , SOIC Package

Features

Applications

••

••

• High Power 5V to 2.5 or 3.3V DC-DC Regulator

••

••

• VGA Card Power Regulation

General Description

The APW7036 provides complete power control and
protection for two DC-DC converter optimized in VGA
Card applications. It integrates two PWM controllers ,
as well as the monitoring and protection function into
a single package.
The APW7036 provides simple , single feedback loop
, voltage mode control with fast transient response.
The output voltage of the SYNC converter can be pre­cisely regulated to as low as V

REF

(1.25V , 1.5V , 1.
8V and 2.05V) , with a maximum tolerence of ±1.0%
over temperature.
The APW7036 can provides in excess of 14A of out­put current for an on-board DC/DC converter. It can
monitors all the output voltage , and a single Power
Good signal is issued when the SYNC output is within
±10% of the V

REF

setting and the ASYNC output lev­els is above under-voltage levels. Additional built-in
over-voltage protection for the SYNC output uses the
lower MOSFET to prevent output voltage above 1 15%
of the V

REF

setting. The PWM controller’s over-cur­rent function monitor the output current by sensing
the voltage drop across the upper MOSFET’s R

DS(ON)

,

eliminating the need for a current sensing resistor .

Pin Description

VCC

GATE

PHASE2

FB2

OCSET1

FB1
COMP

OCSET2

PGOOD

SS

VSEN

NC

VAUX

1
2

3
4
5
6
7
8

10

9

16
15
14
13

GND

PGND

NC

17

18

19

20

12
11

UGATE

LGATE

PHASE1

FAULT/RT

Copyright  ANPEC Electronics Corp.
Rev. A.1 - May, 2001

APW7036

www.anpec.com.tw2

Ordering Information

Absolute Maximum Ratings

Symbol Parameter Rating Unit

VCC Supply Voltage 15 V

VI , V

O

Input , Output or I/O Voltage GND -0.3 V to V12 +0.3 V

T

A

Operating Ambient Temperature Range 0 to 70

°

C

T

J

Junction Temperature Range 0 to 125

°

C

T

STG

Storage Temperature Range -65 to +150

°

C

T

S

Soldering Temperature 300 ,10 seconds

°

C

Block Diagram

GATE

CONTROL

SOFT-START

AND FAULT

LOGIC

GATE

CONTROL

OCSET2

GATE

PHASE2

FB2

GND

PGND

LGATE

PHASE1

UGATE

PGOOD

OCSET1VSEN

FB1SSFAULT

200uA

VCC

DRIVE2

OC2

INHIBIT

PWM2

1.5V

ERROR

AMP2

1.05V

VCC

OSCILLATOR

4.5V

V

REF

ERROR

AMP1

0V

FAULT

OC1

PWM1

VCC

LOWER

DRIVE

VCC

DRIVE1

INHIBIT

115%

90%

110%

200uA

COMP

28uA

POR

VAUX

VCC

APW7036

V

REF

Voltage Code
12 : 1.25V 15 : 1.50V 18 : 1.80V
20 : 2.05V
Package Code
K : SOP - 20
Temp. Range
C : 0 to 70 C
Handling Code
TU : Tube TR : Ta

p

e & Reel

Handling Code
Temp. Range
Package Code
V

REF

Voltage Code

Copyright  ANPEC Electronics Corp.
Rev. A.1 - May, 2001

APW7036

www.anpec.com.tw3

Thermal Characteristics

Symbol Parameter Value Unit

R

θ

JA

Thermal Resistance in Free Air

SOIC
SOIC (with 3in

2

of Copper)

75
65

°

C/W

Electrical Characteristics

(Recommended operating conditions , Unless otherwise noted) Refer to Block and Simplified Power System
Diagrams , and Typical Application Schematic

APW7036

Symbol Parameter Test Conditions

Min. Typ. Max.

Unit

VCC Supply Current

I

CC

Nominal Supply Current UGATE , LGATE , GATE ,

open

9mA

Power-on Reset

Rising VCC Threshold Vocset=4.5V 10.4 V
Falling VCC Threshold Vocset=4.5V 8.2 V
Rising VAUX Threshold Vocset=4.5V 2.5 V
VAUX Threshold Hysteresis Vocset=4.5V 0.5 V
Rising V

OCSET

Threshold 1.26 V

Oscillator

F

OCS

Free Running Frequency RT= Open 185 200 215 kHz

∆

V

OSC

Ramp Amplitude RT= Open 1.9 V

P-P

Switching Controller Reference Voltage

V

REF

Reference Voltage APW7036-12
APW7036-15
APW7036-18
APW7036-20

1.25

1.50

1.80

2.05

V

Reference Voltage accuracy -1.0 +1.0 %

V

FB2

Reference Voltage 1.5 V
Reference Voltage accuracy -3.0 +3.0 %

Synchronous PWM Controller Error Amplifier

DC Gain 88 dB

GBWP Gain-Bandwidth Produc t 15 MHz

SR Slew Rate COMP=10pF 6

V/µs

PWM Controllers Gate Drivers

I

UGATE

UGATE1,GATE Sourc e VCC=12V, V

UGATE 1,GATE

=6V 1 A

R

UGATE

UGATE1,GATE Sink V

UGATE1,GATE

=1V 3.5

Ω

Copyright  ANPEC Electronics Corp.
Rev. A.1 - May, 2001

APW7036

www.anpec.com.tw4

Electrical Characteristics Cont.

Functional Pin Description

UGA TE (Pin 1)

Connect UGATE pin to the synchronous PWM
converter’s upper MOSFET gate. This pin provides
the gate drive for the upper MOSFET.

VCC (Pin 2)

Provide a 12V bias supply for the IC to this pin. This
pin also provides the gate bias charge for all the
MOSFETs controlled by the IC. The voltage at this
pin is monitored for Power-On Reset purposes.

GA TE (Pin 3)

Connect GATE pin to the standard BUCK PWM
converter’s MOSFET gate. This pin provides the gate
drive for the MOSFET.

PHASE2 (Pin 4)

Connect the PHASE2 pin to the standard BUCK PWM

converter’s MOSFET source. This pin is used to moni­tor the voltage drop across the MOSFET for over-cur­rent protection.

PGOOD (Pin 5)

PGOOD is an open collector output used to indicate
the status of the output voltages. This pin is pulled
low when the synchronous regulator output is not within
10% of the reference voltage or the other output is
below under-voltage thresholds.

NC (Pin 10, 13)

No Connection.

OCSET1 , 2 (Pin 17 , 6)

Connect a resistor (R

OCSET

) from this pin to the drain

of the PWM converter’s MOSFET. R

OCSET

, an internal

200µA current source (I

OCSET

) , and the MOSFET’s

on-resistance(r

DS(ON)

) set the converter over-current

APW7036

Symbol Parameter Test Conditions

Min. Typ. Max.

Unit

PWM Controllers Gate Drivers

I

LGATE

LGATE Source VCC=12V, V

LGATE

=1V 1 A

R

LGATE

LGATE Sink V

LGATE

= 1V 3

Ω

Protection

VSEN Over-Voltage (VSEN/V

REF

) VSEN Rising 115 120 %

I

OVP

FAULT Souring Current V

FAULT/RT

=2.0V 8.5 mA

I

OCSET

OCSET1,2 Current Source V

OCSET

= 4.5V

DC

170 200 230

µ

A

I

SS

Soft Start Current 28

µ

A

Power Good

VSEN Upper Threshold
(VSEN/

V

REF

)

VSEN1 Rising

110 %

VSEN Under Voltage (VSEN/V

REF

)

VSEN1 Rising

94 %
VSEN Hysteresis
(VSEN/

V

REF

)

Upper /Lower Threshold 2 %

V

PGOOD

PGOOD Voltage Low I

PGOOD

= -4mA 0.8 V