IR3894 IRF [International Rectifier], IR3894 Datasheet - Page 6

• Manufacturer Part Number: IR3894
• Description: 12A HIGHLY INTERGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

ELECTRICAL SPECIFICATIONS
RECOMMENDED OPERATING CONDITIONS FOR RELIABLE OPERATION WITH MARGIN
*Maximum SW node voltage should not exceed 25V.
**For internally biased single rail operation.
*** Vcc/LDO_out can be connected to an external regulated supply. If so, the Vin input should be connected to Vcc/LDO_out pin.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over, 6.8V < Vin = PVin < 21V, Vref = 0.5V in 0°C < T
Typical values are specified at T
Input Voltage Range*
Input Voltage Range**
Supply Voltage Range***
Supply Voltage Range
Output Voltage Range
Output Current Range
Switching Frequency
Operating Junction Temperature
Power Stage
Supply Current
VCC LDO Output
Power Losses
Top Switch
Bottom Switch
Bootstrap Diode Forward Voltage
SW Leakage Current
Dead Band Time
VIN Supply Current (standby)
VIN Supply Current (dynamic)
Output Voltage
VCC Dropout
Short Circuit Current
Zero‐crossing Comparator Delay
PARAMETER
6
AUGUST 08, 2012 | DATA SHEET | Rev 3.1
a
= 25°C.
Single‐Input Voltage, Synchronous Buck Regulator
SYMBOL
R
R
I
Tdly_zc
in(Standby)
V
ds(on)_Top
ds(on)_Bot
Ishort
I
P
in(Dyn)
cc_drop
I
T
V
LOSS
SW
db
cc
Vin
Fs = 600kHz, L = 0.51uH,
Vcc = 6.4V (Internal LDO),Note 4
VBoot ‐ Vsw= 6.4V,I
Vcc = 6.4V, I
I(Boot) = 15mA
SW = 0V, Enable = 0V
SW = 0V, Enable = high,
Vp = 0V
Note 4
EN = Low, No Switching
EN = High, Fs = 600kHz,
Vin = PVin = 21V
Vin(min) = 6.8V, Icc = 0‐50mA,
Cload = 2.2uF, DCM = 0
Vin(min) = 6.8V, Icc = 0‐50mA,
Cload = 2.2uF, DCM = 1
Icc=50mA,Cload=2.2uF
- 6 -`
= 12V, V
12A Highly Integrated SupIRBuck
CONDITIONS
O
O
= 1.2V, I
= 12A
Boot to SW
Note 4
SYMBOL
PV
V
V
V
F
I
T
CC
O
O
IN
O
S
J
IN
= 12A,T
O
= 12A,
j
=25°C
MIN
300
‐40
1.0
6.8
4.5
4.5
0.5
0
MIN
200
6.0
4.0
0.86xVin
256/Fs
MAX
13.2
1500
TYP
300
7.2
2.1
6.4
4.4
±12
125
20
14
70
7.5
7.5
21
21
J
< 125°C.
IR3894
MAX
17.2
4.85
500
100
9.4
6.7
0.8
18
1
PD‐97745
UNITS
kHz
°C
V
A
UNIT
mΩ
mV
mA
mA
µA
µA
ns
W
V
V
s