Copyright  ANPEC Electronics Corp.

Rev. A.4 - Jul., 2001

APW7035

www.anpec.com.tw

4

Electrical Characteristics Cont.

APW7035

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

DAC and Bandgap Reference

V

DAC

DACOUT Voltage accuracy

-1.0

+1.0

%

V

BG

Bandgap Reference Voltage

1.265

V

Bandgap Reference Tolerance

-2.5

+2.5

%

Linear Regulators

Regulation

3

%

Output Drive Current

VAUX-V

20

40

mA

Synchronous PWM Controller Error Amplifier

DC Gain

88

dB

GBWP Gain-Bandwidth Product

15

MHz

SR

Slew Rate

COMP=10pF

6

V/

µs

PWM Controller Gate Driver

I

UGATE

UGATE Source

V

1

A

R

UGATE

UGATE Sink

V

3.5

Ω

I

LGATE

LGATE Source

V

1

A

R

LGATE

LGATE Sink

V

3

Ω

Protection

VSEN1 Over-Voltage

VSEN1 Rising

115

120

%

Protection

I

OCSET

OCSET Current Source

V

170

200

230

µA

I

SS

Soft Start Current

28

µA

Power Good

VSEN1 Upper Threshold

VSEN1 Rising

109

%

VSEN1 Under Voltage

VSEN1 Rising

93

%

VSEN1 Hysteresis

Upper /Lower Threshold

2

%

V

PGOOD

PGOOD Voltage Low

I

0.8

V

Functional Pin Description

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

Diagrams , and Typical Application Schematic.

VCC (Pin 1)

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 (POR) purposes.

DRIVE (Pin 2)

Connect this pin to the gate of an external MOSFET.

This pin provides the drive for the FBVDDQ

regulator’s pass transistor.