isl9440b Intersil Corporation, isl9440b Datasheet - Page 8

• Manufacturer Part Number: isl9440b
• Description: Triple Step-down Pwm And Single Linear Controller With Programmable Soft-start
• Manufacturer: Intersil Corporation

Electrical Specifications
NOTES:
PGOOD Rise Time
PGOOD Fall Time
EARLY WARNING FUNCTIONS
Undervoltage Lockout Rising (VCC_5V Pin)
Undervoltage Lockout Falling (VCC_5V Pin)
Early Warning Voltage Rising
Early Warning Voltage Falling
RST
RST Voltage Low
RST Leakage Current
RST Rise Time
RST Fall Time
PGOOD/RST TIMING RISING
VIN/VOUT Rising Threshold to PGOOD High Rising
PGOOD Rising to RST Rising
PGOOD/RST TIMING FALLING
V
PGOOD Falling to RST Falling
OVERVOLTAGE PROTECTION
OV Trip Point
OVERCURRENT PROTECTION
Overcurrent Threshold (OCSET_) (Note 5)
Full-Scale Input Current (ISEN_) (Note 5)
Overcurrent Set Voltage (OCSET_)
OVER-TEMPERATURE
Over-Temperature Shutdown
Over-Temperature Hysteresis
3. In normal operation, where the device is supplied with voltage on the V
4. This is the total shutdown current with V
5. Operating current is the supply current consumed when the device is active but not switching. It does not include gate drive current.
6. Limits established by characterization and are not production tested.
7. Check Note 3 for VCC_5V and VIN configurations at 5V ±10% input applications. ISL9440B, ISL9440C’s PGOOD signal will fall LOW when VIN
IN
/V
When the VCC_5V pin is used as a 5V supply input, the internal LDO regulator is disabled and the V
VCC_5V pin. (Refer to the“Pin Descriptions” on page 9 for more details.)
pin voltage drops below 5.55V (TYP), which results from the early warning detection on VIN pin voltage.
OUT
Falling Threshold to PGOOD Falling
PARAMETER
8
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. V
values are at T
specified. Temperature limits established by characterization and are not production tested. (Continued)
IN
= 5.6 and 24V.
IN
A
= 5.6V to 24V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7µF, T
= +25°C; Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
ISL9440B, ISL9440C
RPULLUP = 10k to 3.3V
RPULLUP = 10k to 3.3V
I_SINK = 4mA
RST = 5V
RPULLUP = 10k to 3.3V
RPULLUP = 10k to 3.3V
ROCSET = 55kΩ
IN
TEST CONDITIONS
pin, the VCC_5V pin provides a 5V output capable of 60mA (min).
IN
input pin must be connected to the
3.40
3.25
5.30
1.70
MIN
100
4.5
35
A
= -40°C to +85°C, Typical
0.025
0.05
3.85
3.70
TYP
0.05
5.75
5.55
0.05
0.05
1.75
200
150
118
1.0
5.5
70
32
15
20
MAX
4.30
4.15
5.95
1.80
300
110
0.4
6.5
1
January 15, 2009
UNITS
FN6799.0
ms
µA
µA
µA
µs
µs
µs
µs
µs
µs
µs
°C
°C
%
V
V
V
V
V
V