ISL8112 Intersil Corporation, ISL8112 Datasheet - Page 5

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

Electrical Specifications
Undervoltage-Lockout Fault Threshold
LDO 5V Bootstrap Switch Threshold to BYP
LDO 3.3V Bootstrap Switch Threshold to BYP Rising edge at BYP regulation point
LDO 5V Bootstrap Switch Equivalent
Resistance
LDO 3.3V Bootstrap Switch Equivalent
Resistance
VREF2 Output Voltage
VREF2 Load Regulation
VREF2 Current Limit
VREF1 Output Voltage
VREF1 Load Regulation
VREF1 Sink Current
V
V
V
Quiescent Power Consumption
FAULT DETECTION
Overvoltage Trip Threshold
Overvoltage Fault Propagation Delay
PGOOD_ Threshold
PGOOD_ Propagation Delay
PGOOD_ Output Low Voltage
PGOOD_ Leakage Current
Thermal-Shutdown Threshold
Output Undervoltage Shutdown Threshold
Output Undervoltage Shutdown Blanking
Time
INPUTS AND OUTPUTS
FB1 Input Voltage
IN
IN
IN
Operating Supply Current
Standby Supply Current
Shutdown Supply Current
PARAMETER
5
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
Rising edge of PVCC
Falling edge of PVCC
Rising edge at BYP regulation point
LDOREF = GND
LDOREF = VCC
LDO to BYP, BYP = 5V, LDOREF > (VCC-1V),
Guaranteed by design
LDO to BYP, BYP = 3.3V, LDOREF < 0.3V, Guaranteed
by design
No external load, VCC > 4.5V
No external load, VCC < 4.0V
VREF2 = GND
No external load
VREF1 in regulation
Both SMPSs on, FB1 = MODE = GND,
OUT2REF = VCC
V
V
Both SMPSs on, FB1 = MODE = GND,
OUT2REF = VCC,
VSEN1 = BYP = 5.3V, VSEN2 = 3.5V
FB1 with respect to nominal regulation point
OUT2REF with respect to nominal regulation point
FB1 or OUT2REF delay with 50mV overdrive
FB1 or OUT2REF with respect to nominal output, falling
edge, typical hysteresis = 1%
Falling edge, 50mV overdrive
ISINK = 4mA
High state, forced to 5.5V
FB1 or OUT2REF with respect to nominal output voltage
From EN_ signal
Low level
High level
VSEN1 = BYP = 5.3V, VSEN2 = 3.5V
0 < ILOAD < 5mA
0 < ILOAD < 50µA
IN
IN
= 5.5V to 25V, both SMPSs off, EN_LDO = VCC
= 4.5V to 25V, EN1=EN2=EN_LDO=0V
A
= +25°C. (Continued)
ISL8112
CONDITIONS
A
= -40°C to +100°C, unless otherwise noted.
VCC-1.0
3.235
3.220
1.980
4.53
MIN
-12
3.9
3.0
+12
10
65
10
+8
3.300
3.300
2.000
+150
TYP
4.35
4.05
4.68
180
+16
+11
3.1
0.7
1.5
10
25
20
10
10
20
10
10
-9
70
5
3.365
3.380
2.020
MAX
4.83
250
+14
+20
4.5
3.2
1.5
3.0
0.2
0.3
50
30
30
-6
17
75
7
1
November 21, 2006
UNITS
FN6396.0
mW
mV
mA
mV
µA
ms
µA
µA
µA
µA
°C
µs
µs
%
%
%
%
Ω
Ω
V
V
V
V
V
V
V
V
V