IR35211 datasheet(11/58 Pages) IRF

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Dual Output Digital Multi-Phase Controller

IR35211

July 24, 2014 | V1.00

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

Fault Protection

OVP Threshold During Start-up

(until output reaches 1V)

1.2

1.275

1.35

OVP Operating Threshold

(programmable)

Relative to VID

150 to

500

Output UVP Threshold

1 (programmable)

Relative to VID

-150 to -

500

OVP/UVP Filter Delay

160

Fast OCP Range (per phase)

0 to 62

Fast OCP Filter Bandwidth

kHz

Slow OCP Filter Bandwidth

3.2/52

OCP System Accuracy

System excluding

DCR/sense resistor

±2

VR_HOT Range

64 to 127

°C

OTP Range

VR_HOT level + OTP

Range

64 to 134

°C

Dynamic Phase Control

Current Filter Bandwidth

For Phase drop

5.3

kHz

Timing Information

Automatic Configuration from MTP

t3-t2

3.3V ready to end of

configuration

Automatic Trim Time

t4-t3

EN Delay (to ramp start)

µs

VID Delay (to ramp start)

Loop bandwidth dependent

µs

VRDY1/2 Delay

After reaching Boot voltage

µs

Notes:

1 Guaranteed by design.

2 PWM operating frequency will vary slightly as the number of phases changes (increases/decreases) because of the internal calculation

involved in dividing a switching period evenly into the number of active phases.

3 System accuracy is for a temperature range of 0°C to +85°C. Accuracies will derate by a factor of 1.5x for temperatures outside the 0°C to

+85°C range.

IR35211 Datasheet(PDF) 11 Page - International Rectifier

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