ISL8112 Intersil Corporation, ISL8112 Datasheet - Page 4

• Manufacturer Part Number: ISL8112
• Description: Main Power Supply Controllers
• Manufacturer: Intersil Corporation

Electrical Specifications
Current-Limit Threshold
(Positive, Adjustable)
Zero-Current Threshold
Current-Limit Threshold (Negative, Default)
Soft-Start Ramp Time
Operating Frequency
On-Time Pulse Width
Minimum Off-Time
Maximum Duty Cycle
Ultrasonic SKIP Operating Frequency
INTERNAL REGULATOR AND REFERENCE
LDO Output Voltage
LDO Output Voltage
LDO Output in Adjustable Mode
LDO Output Accuracy in Adjustable Mode
LDOREF Input Range
LDO Output Current
LDO Output Current During Switch Over
LDO Output Current During Switch Over to
3.3V
LDO Short-Circuit Current
PARAMETER
4
Circuit of Figure 17, and Figure 18, no load on LDO, VSEN1, VSEN2, VREF2, and VREF1, VIN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, VEN_LDO = 5V, T
Typical values are at T
GND - PH_
MODE = GND, VREF1, or OPEN, GND - PH_
MODE = VCC, GND - PH_
Zero to full limit
VFS = VREF1 or OPEN
(400kHz/300kHz)
VFS = VCC (200kHz/300kHz)
MODE = VREF1 or OPEN
BYP = GND, 5.5V < V
0 < ILDO < 100mA
BYP = GND, 5.5V < V
0 < ILDO < 100mA
V
V
V
V
BYP = GND, V
BYP = 5V, V
BYP = 3.3V, V
LDO = GND, BYP = GND
(VFS = VREF1 or OPEN),
(VFS = VCC), MODE = VCC
VFS = GND
VFS = VREF1 or OPEN
VFS = VCC
(VFS = GND), MODE = VCC
VFS = GND (400kHz/500kHz)
MODE = VCC
IN
IN
IN
LDO
= 5.5V to 25V, V
= 5.5V to 25V, V
= 5.5V to 25V, V
= 2 x V
A
= +25°C. (Continued)
IN
LDOREF
IN
IN
= 5.5V to 25V, LDOREF < 0.3V
= 5.5V to 25V, LDOREF > (VCC-1V)
= 5.5V to 25V, Guaranteed by design
ISL8112
LDO
LDOREF
LDOREF
CONDITIONS
IN
IN
< 25V, LDOREF < 0.3V,
< 25V, LDOREF > (VCC-1V),
= 2 x V
= 0.35V to 0.5V
= 0.5V to 2.25V
LDOREF
VILIM_ = 0.5V
VILIM_ = 1V
VILIM_ = 2V
SMPS 1
SMPS 2
SMPS 1
SMPS 2
SMPS 1
SMPS 2
VSEN1 = 5.00V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
A
= -40°C to +100°C, unless otherwise noted.
0.895
0.475
0.895
0.833
1.895
0.833
4.925
3.250
0.35
MIN
185
200
0.7
40
93
25
1.052
0.555
1.052
0.925
2.105
0.925
5.000
3.300
TYP
-120
100
200
400
500
400
300
200
300
300
200
1.7
50
88
85
88
91
94
91
37
3
1.209
0.635
1.209
1.017
2.315
1.017
5.075
3.350
MAX
±1.5
2.25
107
215
400
100
200
100
400
4.5
60
±2
November 21, 2006
UNITS
FN6396.0
kHz
kHz
kHz
kHz
kHz
kHz
kHz
mV
mV
mV
mV
mV
mA
mA
mA
mA
ms
µs
µs
µs
µs
µs
µs
ns
%
%
%
%
%
%
%
%
V
V
V
V