ISL6237 Datasheet, PDF (5/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6237
Electrical Specifications
PARAMETER
No load on LDO, OUT1, OUT2, and REF, V_IN = 12V, EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V,
V_{EN_LDO} = 5V, T_A = -40°C to +100°C, unless otherwise noted. Typical values are at T_A = +25°C. (Continued)
CONDITIONS
MIN
(Note 4)
TYP
MAX
(Note 4) UNITS
LDO Short-Circuit Current
LDO = GND, BYP = GND
200
400
mA
Undervoltage-Lockout Fault Threshold
Rising edge of PVCC
4.35
4.5
V
Falling edge of PVCC
3.9
4.05
V
LDO 5V Bootstrap Switch Threshold to BYP Rising edge at BYP regulation point
LDOREFIN = GND
4.53
4.68
4.83
V
LDO 3.3V Bootstrap Switch Threshold to
BYP
Rising edge at BYP regulation point
LDOREFIN = VCC
3.0
3.1
3.2
V
LDO 5V Bootstrap Switch Equivalent
Resistance
LDO to BYP, BYP = 5V, LDOREFIN > (VCC - 1V) (Note 3)
0.7
1.5
Ω
LDO 3.3V Bootstrap Switch Equivalent
Resistance
LDO to BYP, BYP = 3.3V, LDOREFIN < 0.3V (Note 3)
1.5
3.0
Ω
REF Output Voltage
No external load
1.980 2.000 2.020
V
REF Load Regulation
REF Sink Current
0 < I_LOAD < 50µA
REF in regulation
10
mV
10
µA
VIN Operating Supply Current
VIN Standby Supply Current
VIN Shutdown Supply Current
Quiescent Power Consumption
FAULT DETECTION
Both SMPSs on, FB1 = SKIP = GND, REFIN2 = VCC
V_OUT1 = BYP = 5.3V, V_OUT2 = 3.5V
V_IN = 5.5V to 25V, both SMPSs off, EN_LDO = VCC
V_IN = 4.5V to 25V, EN1 = EN2 = EN_LDO = 0V
Both SMPSs on, FB1 = SKIP = GND, REFIN2 = VCC,
V_OUT1 = BYP = 5.3V, V_OUT2 = 3.5V
25
50
µA
180
250
µA
20
30
µA
5
7
mW
Overvoltage Trip Threshold
FB1 with respect to nominal regulation point
+8
+11
+14
%
REFIN2 with respect to nominal regulation point
+12
+16
+20
%
Overvoltage Fault Propagation Delay
FB1 or REFIN2 delay with 50mV overdrive
10
µs
POK_ Threshold
FB1 or REFIN2 with respect to nominal output, falling
edge, typical hysteresis = 1%
-12
-9
-6
%
POK_ Propagation Delay
Falling edge, 50mV overdrive
10
µs
POK_ Output Low Voltage
POK_ Leakage Current
I_SINK = 4mA
High state, forced to 5.5V
0.2
V
1
µA
Thermal-Shutdown Threshold
+150
°C
Output Undervoltage Shutdown Threshold FB1 or REFIN2 with respect to nominal output voltage
65
70
75
%
Output Undervoltage Shutdown Blanking
Time
From EN_ signal
10
20
30
ms
INPUTS AND OUTPUTS
FB1 Input Voltage
Low level
0.3
V
High level
VCC - 1.0
V
REFIN2 Input Voltage
OUT2 Dynamic Range, V_OUT2 = V_REFIN2
Fixed OUT2 = 1.05V
0.5
2.50
V
3.0
VCC - 1.1 V
Fixed OUT2 = 3.3V
VCC - 1.0
V
LDOREFIN Input Voltage
Fixed LDO = 5V
0.30
V
LDO Dynamic Range, V_LDO = 2 x V_LDOREFIN
Fixed LDO = 3.3V
0.35
VCC - 1.0
2.25
V
V
5
FN6418.4
March 18, 2008