IR3535 datasheet(7/17 Pages) IRF

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March 13, 2013 | FINAL DATASHEET

IR3535

Synchronous Buck Converter Driver

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

PWM Comparator

High Side Switch Threshold

PWM Low or PWM Tri‐State to High

2.5

Low Side Switch Threshold

PWM High or PWM Tri‐State to Low

0.8

PWM Tri‐State Float Voltage

Floating

1.2

1.65

2.1

Hysteresis

Active to Tri‐State to Active, Note 1

100

Tri‐State Propagation Delay Time

CPWM = 20pF, measure from V(PWM) = 0V

to GATEL < 1V

190

CPWM = 20pF, measure from V(PWM) = 5V

release to GATEH < 1V

380

PWM Input

Sinking Impedance

3.67

5.1

8.7

KΩ

Source Impedance

3.67

5.1

8.7

KΩ

GATEH Turn‐Off Propagation Delay

Measure from V(PWM) falling edge to

GATEH < 1V

Current Sense Amplifier

CSIN+/‐ Bias Current

‐100

100

Input Offset Voltage

CSIN+ = CSIN‐ = REFIN, measure input

referred offset from REFIN

‐750

750

µV

Calibrated Input Offset Voltage

Self‐calibrated offset, Note 1 ‐450

450

µV

Gain

0.5V ≤ V(REFIN) < 2.25

32.5

V/V

Unity Gain Bandwidth

C(IOUT) = 10pF, measure at IOUT. Note 1

4.8

6.8

8.8

MHz

Slew Rate

V/µs

Differential Input Range

0.8V ≤ V(REFIN) ≤ 2.25V, Note 1 ‐10

0.25V ≤ V(REFIN) ≤ 0.8V, Note 1 ‐5

Common Mode Input Range

VCC –

2.5

Output Impedance

200 Ω

IOUT Sink Current

Driving external 3 kΩ

0.5

0.8

1.1

Bootstrap Diode

Forward Voltage

I(BOOST) = 30mA, VCC = 6.8V

360

520

960

Digital Output ― Phase Fault

VOH

HIGH Level Pull‐Up Voltage

VOL

I(PHSFLT#) = 4mA

150

300

Leakage Current

V(PHSFLT#) = 5.5V

µA

Phase Fault Detection

Top Side Threshold

Measure from Vin to SW

1.9

2.2

2.5

Bottom Side Threshold

150

200

250

Bottom FET Open Threshold

‐250 ‐215 ‐180

Propagation Delay

PWM High to PWM Low Cycles

Cycles

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