CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
θ
JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
PARAMETER
VCC SUPPLY CURRENT
Nominal Supply
Recommended Operating Conditions, Unless Otherwise Noted V
CC
= 5.0V±5% and T
A
= 25
o
C
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
VCC
ISL6431CB; UGATE and LGATE Open
ISL6431IB; UGATE and LGATE Open
-
2.5
3.2
3.2
-
3.8
mA
mA
POWER-ON RESET
Rising VCC POR Threshold
POR
ISL6431CB
ISL6431IB
VCC POR Threshold
Hysteresis
OSCILLATOR
Frequency
f
OSC
∆V
OSC
ISL6431CB; VCC = 5V
ISL6431IB; VCC = 5V
Ramp Amplitude
ISL6431CB
ISL6431IB
REFERENCE
Reference Voltage Tolerance
ISL6431CB
ISL6431IB
Nominal Reference Voltage
V
REF
ISL6431CB
ISL6431IB
ERROR AMPLIFIER
DC Gain
ISL6431CB
ISL6431IB
Gain-Bandwidth Product
GBWP
ISL6431CB
ISL6431IB
Slew Rate
SR
ISL6431CB; COMP = 10pF
ISL6431IB; COMP = 10pF
GATE DRIVERS
Upper Gate Source Current
I
UGATE-SRC
I
UGATE-SNK
I
LGATE-SRC
ISL6431CB; V
BOOT
- V
PHASE
= 5V, V
UGATE
= 4V
ISL6431IB; V
BOOT
- V
PHASE
= 5V, V
UGATE
= 4V
Upper Gate Sink Current
ISL6431CB
ISL6431IB
Lower Gate Source Current
ISL6431CB; V
CC
= 5V, V
LGATE
= 4V
ISL6431IB; V
CC
= 5V, V
LGATE
= 4V
-
-
-
-
-
-
1.0
1.0
1.0
1.0
1.0
1.0
-
-
-
-
-
-
A
A
A
A
A
A
-
-
14
14
-
4.5
82
82
-
-
8.0
8.0
-
-
-
-
-
9.2
dB
dB
MHz
MHz
V/µs
V/µs
-
-
-
-
-
-
0.800
0.800
1.5
1.5
-
-
%
%
V
V
-
230
-
-
300
300
1.5
1.5
-
340
-
-
kHz
kHz
V
P-P
V
P-P
ISL6431CB
ISL6431IB
-
4.17
-
0.01
4.30
4.30
0.20
0.20
-
4.50
-
0.85
V
V
V
V
3
ISL6431
Electrical Specifications
PARAMETER
Lower Gate Sink Current
Recommended Operating Conditions, Unless Otherwise Noted V
CC
= 5.0V±5% and T
A
= 25
o
C
(Continued)
SYMBOL
I
LGATE-SNK
ISL6431CB
ISL6431IB
PROTECTION / DISABLE
OCSET Current Source
I
OCSET
V
DISABLE
ISL6431CB
ISL6431IB
Disable Threshold
ISL6431CB
ISL6431IB
17
14
-
-
20
20
-
-
22
24
0.8
0.8
µA
µA
V
V
TEST CONDITIONS
MIN
-
-
TYP
2.0
2.0
MAX
-
-
UNITS
A
A
Functional Pin Descriptions
VCC (Pin 5)
This is the main bias supply for the ISL6431, as well as the
lower MOSFET’s gate. Connect a well-decoupled 5V supply
to this pin.
(I
OCSET
), and the upper MOSFET on-resistance (r
DS(ON)
)
set the converter overcurrent (OC) trip point according to the
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