IR3477 Просмотр технического описания (PDF) - International Rectifier
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IR3477 Datasheet PDF : 21 Pages
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15A Highly Integrated SupIRBuckTM
IR3477
ELECTRICAL SPECIFICATIONS
RECOMMENDED OPERATING CONDITIONS FOR RELIABLE OPERATION WITH MARGIN
Recommended VIN Range
Recommended VCC Range
Recommended Output Voltage Range
Recommended Output Current Range
Recommended Switching Frequency
Recommended Operating Junction Temperature
* PHASE pin must not exceed 30V.
SYMBOL
VIN
VCC
VOUT
IOUT
FS
TJ
MIN
3
4.5
0.5
0
N/A
‐40
MAX
27*
5.5
12
15
750
125
UNITS
V
A
kHz
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over VIN = 12V, 4.5V < VCC < 5.5V, 0°C ≤ TJ ≤ 125°C.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNIT
Control Loop
Reference Accuracy
On‐Time Accuracy
Min. Off Time
VREF
VFB = 0.5V
RFF = 180K, TJ = 65°C
0.495 0.5 0.505
V
280
300
320
ns
500
580
ns
Soft‐Start Current
EN = High
8
10
12
µA
DCM Comparator Offset
Feedback Input Current
Supply Current
Measure at VPHASE
‐4.5
‐2.5
0
mV
VFB = 0.5V, TA = 25°C, Note 1
0.01
0.2
µA
VCC Supply Current (standby)
EN = Low, No Switching
23
µA
VCC Supply Current (dynamic)
FF Shutdown Current
Forced Continuous Conduction Mode (FCCM)
EN = High, FS = 300kHz
EN = Low, RFF = 180K
9.7
mA
2
µA
FCCM Start Threshold
2
V
FCCM Stop Threshold
0.6
V
Gate Drive
Deadtime
Monitor body diode
5
conduction on PHASE pin,
Note 1
30
ns
Bootstrap PFET
Forward Voltage
I(BOOT) = 10mA
300
mV
Upper MOSFET
Static Drain‐to‐Source On‐Resistance
Lower MOSFET
VCC = 5V, ID = 12A, TJ = 25°C
14.5
20
mΩ
Static Drain‐to‐Source On‐Resistance
VCC = 5V, ID = 12A, TJ = 25°C
6
7.5
mΩ
7 March 27, 2013 | V2.5 | PD97604
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