IR3553_15 datasheet(8/22 Pages) IRF

8 / 22 page

July 16, 2014 | DATASHEET V3.3

IR3553

40A Integrated PowIRstage®

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

Bootstrap Diode

Forward Voltage

VFWD

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

360

520

920

VCC Under Voltage Lockout

Start Threshold

VVCC_START

3.3

3.7

4.1

Stop Threshold

VVCC_STOP

3.0

3.4

3.8

Hysteresis

VVCC_HYS

0.2

0.3

0.4

General

VCC Supply Current

IVCC

VCC = 4.5V to 7V

VIN Supply Leakage Current

IVIN

VIN = 20V, 125C, V(PWM) =

Tri-State

µA

BOOST Supply Current

IBOOST

4.75V < V(BOOST)-V(SW) <

0.5

1.5

3.0

REFIN Bias Current

IREFIN

-1.5

µA

SW Floating Voltage

VSW_FLOAT

V(PWM) = Tri-State

0.2

0.4

SW Pull Down Resistance

RSW_PULLDOWN

BBRK# is Low or VCC = 0V

kΩ

Notes

1. Guaranteed by design but not tested in production

2. VIN=12V, VOUT=1.2V, ƒSW = 300kHz, L=210nH (0.2mΩ), VCC=6.8V, CIN=47uF x 4, COUT =470uF x3, 400LFM airflow, no heat sink, 25°C

ambient temperature, and 8-layer PCB of 3.7” (L) x 2.6” (W). PWM controller loss and inductor loss are not included.

3. VIN=12V, VOUT=1.2V, ƒSW = 400kHz, L=150nH (0.29mΩ), VCC=7V, CIN=47uF x 4, COUT =470uF x3, no airflow, no heat sink, 25°C ambient

temperature, and 8-layer PCB of 3.7” (L) x 2.6” (W). PWM controller loss and inductor loss are not included.

4. VIN=12V, VOUT=1.2V, ƒSW = 400kHz, L=210nH (0.2mΩ, 13mm x 13mm x 8mm), VCC=6.8V, CIN=47uF x 4, COUT =470uF x3, no heat sink,

25°C ambient temperature, 8-layer PCB of 3.7” (L) x 2.6” (W), 5ms load pulse width, 10% load duty cycle, and IR3553 junction

temperature below 125°C.

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