ISL6237 Datasheet, PDF (4/35 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
Current-Limit Threshold
(Positive, Adjustable)
Zero-Current Threshold
GND - PHASE_
V_{ILIM_} = 0.5V
V_{ILIM_}= 1V
V_{ILIM_} = 2V
SKIP = GND, REF, or OPEN, GND - PHASE_
40
50
60
mV
93
100
107
mV
185
200
215
mV
3
mV
Current-Limit Threshold (Negative, Default) SKIP = VCC, GND - PHASE_
-120
mV
Soft-Start Ramp Time
Zero to full limit
1.7
ms
Operating Frequency
(V_tON = GND), SKIP = VCC
SMPS 1
SMPS 2
400
kHz
500
kHz
(V_tON = REF or OPEN),
SKIP = VCC
SMPS 1
SMPS 2
400
kHz
300
kHz
(V_tON = VCC), SKIP = VCC
SMPS 1
SMPS 2
200
kHz
300
kHz
On-Time Pulse Width
Minimum Off-Time
Maximum Duty Cycle
Ultrasonic SKIP Operating Frequency
V_tON = GND (400kHz/500kHz)
V_tON = REF or OPEN
(400kHz/300kHz)
V_tON = VCC (200kHz/300kHz)
T_A = -40°C to +100°C
T_A = -40°C to +85°C
V_tON = GND
V_tON = REF or OPEN
V_tON = VCC
SKIP = REF or OPEN
V_OUT1 = 5.00V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
V_OUT1 = 5.05V
V_OUT2 = 3.33V
0.895 1.052 1.209
µs
0.475 0.555 0.635
µs
0.895 1.052 1.209
µs
0.833 0.925 1.017
µs
1.895 2.105 2.315
µs
0.833 0.925 1.017
µs
200
300
425
ns
200
300
410
ns
88
%
85
%
88
%
91
%
94
%
91
%
25
37
kHz
INTERNAL REGULATOR AND REFERENCE
LDO Output Voltage
BYP = GND, 5.5V < V_IN < 25V, LDOREFIN < 0.3V,
0 < ILDO < 100mA
4.925 5.000 5.075
V
LDO Output Voltage
BYP = GND, 5.5V < V_IN < 25V, LDOREFIN > (VCC - 1V), 3.250 3.300 3.350
V
0 < ILDO < 100mA
LDO Output in Adjustable Mode
V_IN = 5.5V to 25V, V_LDO = 2 x V_LDOREFIN
0.7
LDO Output Accuracy in Adjustable Mode V_IN = 5.5V to 25V, V_LDOREFIN = 0.35V to 0.5V
V_IN = 5.5V to 25V, V_LDOREFIN = 0.5V to 2.25V
LDOREFIN Input Range
V_LDO = 2 x V_LDOREFIN
0.35
LDO Output Current
BYP = GND, V_IN = 5.5V to 25V (Note 3)
LDO Output Current During Switchover
BYP = 5V, V_IN = 5.5V to 25V, LDOREFIN < 0.3V
LDO Output Current During Switchover to
3.3V
BYP = 3.3V, V_IN = 5.5V to 25V, LDOREFIN > (VCC - 1V)
4.5
V
±2.5
%
±1.5
%
2.25
V
100
mA
200
mA
100
mA
4
FN6418.4
March 18, 2008