IR3531 datasheet(14/39 Pages) IRF

14 / 39 page

4+1 Phase Dual Output Control IC

IR3531

March 22, 2012 | FINAL | V2.27

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

BBR1# Sink Resistance

BBRSNKRES

Ω

BBR1# High Voltage

BBRHIGH

I(BBR1#) = -1mA, measure V(VCC)

– V(BBR1#)

0.4

0.8

BBR1# Low Voltage

BBRLOW

I(BBR1#) = 1mA

0.35

0.8

Remote Sense Differential Amplifier

Unity Gain Bandwidth

RSABW

Note 1

1.5

3.2

4.5

Input Outset Voltage

RSAOFF

0.25V≤ V(VOSEN+) - V(VOSEN-)

≤ 1.52V,

0.25V≤ V(VOSEN1+) - V(VOSEN1-)

≤ 1.52V

-5

Sink Current

RSASINK

0.5V≤ V(VOSEN+) - V(VOSEN-)

≤ 1.52V,

0.5V≤ V(VOSEN1+) - V(VOSEN1-)

≤ 1.52V

0.4

V(VOSEN+) - V(VOSEN-) = 0.25V,

V(VOSEN1+) - V(VOSEN1-) =

0.25V

0.225

0.5

0.8

Source Current

RSASRC

0.25V≤ V(VOSEN+) - V(VOSEN-)

≤ 1.52V,

0.25V≤ V(VOSEN1+) - V(VOSEN1-)

≤ 1.52V

Slew Rate

RSASLEW

0.25V≤ V(VOSEN+) - V(VOSEN-)

≤ 1.52V,

0.25V≤ V(VOSEN1+) - V(VOSEN1-)

≤ 1.52V

V/µs

VOSEN+ Bias Current

VOSNS-BIAS

0.25 V < V(VOSEN+) < 1.52V,

0.25 V < V(VOSEN1+) < 1.52V

µA

VOSEN- Bias Current

VOSNS+BIAS

-0.3V ≤ VOSEN- ≤ 0.3V, All VID

Codes,

-0.3V ≤ VOSEN1- ≤ 0.3V, All VID

Codes

µA

High Voltage

VOHIGH

V(VCC) – V(VO), V(VCC) – V(VO1)

1.5

2.5

Low Voltage

VOLOW

V(VCC) = 7V

100

VRHOT# Comparator

Output Voltage

VRHTOUT

I(VRHOT#) = 30mA

150

400

VRHOT# Leakage Current

VRHTLEAK

V(VRHOT#) = 5.5V

µA

Platform Test Mode

Comparator Threshold

PTMTHR

Raise ADDR voltage after VIN

power-up

2.2

2.6

3.1

Link States Reset Timer

PTMTIME

µs

VR Settled

Comparator Offset

VRSTLOFF

Compare FB to VDAC reference

Delay to ALERT#

VRSTLDELAY

Delay after DAC settled to within

2 VID steps of final value

µs

Current Inputs

IINx to IINx Impedance

IINRES

3000

Ω

IINx to IINx Leakage Current

IINLEAK

-1

µA

TRACK Inputs

Input Leakage

-1

µA

IR3531 Datasheet(PDF) 14 Page - International Rectifier

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