APW8821 datasheet(4/24 Pages) ANPEC

4 / 24 page

Rev. A.1 - Feb., 2011

APW8821

www.anpec.com.tw

Electrical Characteristics

These specifications apply over T

A = -40 ~ 85°C, unless otherwise specified. Typical values are at TA = 25°C, VCC=5V

APW8821

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VOUT AND VFB VOLTAGE

External REFIN output voltage

tolerance, REFIN=1V

-5

External REFIN adjustable output

range

0.5

2.5

Internal FB adjustable output range

0.5

3.3

Reference Voltage

0.5

TA = 25

−0.4

−

+0.4

VREF

Regulation Accuracy

TA = -40

oC ~ 85 oC

−0.6

−

+0.6

IFB

FB Input Bias Current

FB=0.5V

0.02

0.1

µA

RDIS

VOUT Discharge Resistance

Ω

SUPPLY CURRENT

IVCC

VCC Input Bias Current

VCC Current, REFIN=5V,

VFB=0.55V, PHASE=0.5V

250

400

µA

IVCC_SHDN

VCC Shutdown Current

REFIN=GND, VCC=5V

µA

SWITCHING FREQUENCY AND DUTY AND INTERNAL SOFT START

FSW

Switching Frequency

Vin=8V, VOUT=1V, IOUT=10A

315

350

385

kHz

TON(MIN)

Minimum on time

110

TOFF(MIN)

Minimum off time

VFB=0.45V, VPHASE=-0.1V

350

450

550

TSS

Internal Soft Start Time

VOUT from 0% to 95%Regulation

1.0

GATE DRIVER

UG Pull-Up Resistance

BOOT-UG=0.5V

1.5

Ω

UG Sink Resistance

UG-PHASE=0.5V

0.7

1.8

Ω

LG Pull-Up Resistance

PVCC-LG=0.5V

1.0

2.2

Ω

LG Sink Resistance

LG-PGND=0.5V

0.5

1.2

Ω

UG to LG Dead time

UG falling to LG rising

LG to UG Dead time

LG falling to UG rising

BOOTSTRAP SWITCH

Ron

VVCC – VBOOT-GND, IF = 10mA

0.3

0.4

Reverse Leakage

VBOOT-GND = 30V, VPHASE = 25V,

VVCC = 5V

0.5

µA

VCC POR THRESHOLD

VVCC_THR

Rising VCC POR Threshold

Voltage

4.25

4.35

4.45

VCC POR Hysteresis

100

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