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IR3551 Datasheet(PDF) 8 Page - International Rectifier

Part No. IR3551
Description  50A Integrated PowIRstage
Download  22 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3551 Datasheet(HTML) 8 Page - International Rectifier

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July 16, 2013 | DATASHEET V3.2
8
IR3551
50A Integrated PowIRstage®
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
Bootstrap Diode
Forward Voltage
VFWD
I(BOOST) = 30mA, VCC=6.8V
360
520
920
mV
VCC Under Voltage Lockout
Start Threshold
VVCC_START
3.3
3.7
4.1
V
Stop Threshold
VVCC_STOP
3.0
3.4
3.8
V
Hysteresis
VVCC_HYS
0.2
0.3
0.4
V
General
VCC Supply Current
IVCC
VCC = 4.5V to 7V
4
8
12
mA
VIN Supply Leakage Current
IVIN
VIN = 20V, 125C, V(PWM) =
Tri-State
1
µA
BOOST Supply Current
IBOOST
4.75V < V(BOOST)-V(SW) <
8V
0.5
1.5
3.0
mA
REFIN Bias Current
IREFIN
-1.5
0
1
µA
SW Floating Voltage
VSW_FLOAT
V(PWM) = Tri-State
0.2
0.4
V
SW Pull Down Resistance
RSW_PULLDOWN
BBRK# is Low or VCC = 0V
18
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 IR3551 junction
temperature below 125°C.


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