IR3084A datasheet(5/45 Pages) IRF

5 / 45 page

IR3084A

Page 5 of 45

10/30/2006

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

VRRDY OUTPUT

Output Voltage

I(VRRDY) = 4mA

150

300

Leakage Current

V(VRRDY) = 5.5V

µA

OSCILLATOR

Switching Frequency

450

500

550

kHz

Peak Voltage (4.8V typical,

measured as % of VBIAS)

Valley Voltage (0.9V typical,

measured as % of VBIAS)

DRIVER BIAS REGULATOR

REGSET Bias Current

1.5V

95(*6(7 9&& – 1.5V

í112

í99

í85

µA

Input Offset Voltage

1.5V

95(*6(7 9&& – 1.5V,

100

µA

,5(*'59 P$

í12

Short Circuit Current

V(REGDRV) = 0V,

1.5V

95(*6(7 9&& – 1.5V,

Note 1

Dropout Voltage

I(REGDRV) = 10mA, Note 1

0.4

0.87

1.33

VCC UNDER

íVOLTAGE LOCKOUT

Start Threshold

9.3

9.9

10.3

Stop Threshold

8.5

9.1

9.5

Hysteresis

Start – Stop

575

800

1000

GENERAL

VCC Supply Current

VOSNS

í &XUUHQW

í0.3V VOSNSí 0.3V,

All VID Codes

í1.45

í1.3

í0.75

Note 1: Guaranteed by design but not tested in production

Note 2: VDAC Output is trimmed to compensate for Error Amp input offsets errors

200 OHM

ISINK

IOFFSET

"FAST"

VDAC

ISOURCE

ERROR

AMP

VDAC

BUFFER

AMP

IROSC

IROSC IOCSET

ROSC

BUFFER

AMP

CURRENT

SOURCE

GENERATOR

1.2V

EAOUT

VSETPT

VDAC

OCSET

ROSC

VOSNS-

IR3084

ROSC

RVDAC

CVDAC

200 OHM

SYSTEM

SET POINT

VOLTAGE

Figure 1 – System Set Point Test Circuit

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