Mu lt i-Ou t p u t , Lo w -No is e P o w e r-S u p p ly
Co n t ro lle rs fo r No t e b o o k Co m p u t e rs
0–MAX1635
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, SKIP = 0V, T = T
to T , unless otherwise noted.
MAX
A
MIN
Typical values are at T = +25°C.)
A
PARAMETER
SYNC Input High Pulse Width
SYNC Input Low Pulse Width
SYNC Rise/Fall Time
CONDITIONS
MIN
TYP
MAX
UNITS
ns
Not tested
Not tested
Not tested
200
200
ns
200
350
ns
SYNC Input Frequency Range
240
kHz
V+ = VL = 0V,
CSL3 = CSH3 = CSL5 = CSH5 = 5.5V
Current-Sense Input Leakage Current
0.01
10
µA
FLYBACK CONTROLLER
V
Regulation Threshold
Falling edge (Note 3)
13
14
V
V
DD
SECFB Regulation Threshold
DL Pulse Width
Falling edge (MAX1631/MAX1634)
2.44
2.60
V
DD
< 13V or SECFB < 2.44V
1
µs
V
Shunt Threshold
Shunt Sink Current
Leakage Current
Rising edge, hysteresis = 1% (Note 3)
18
10
20
30
V
DD
V
DD
V
DD
= 20V (Note 3)
mA
µA
V
DD
V
DD
= 5V, off mode (Notes 3, 4)
12V LINEAR REGULATOR (Note 3)
12OUT Output Voltage
13V < V < 18V, 0mA < I
< 120mA
11.65
12.1
150
50
12.50
100
V
DD
LOAD
12OUT Current Limit
12OUT forced to 11V, V = 13V
mA
µA
DD
Quiescent V Current
V
DD
= 18V, run mode, no 12OUT load
DD
INTERNAL REGULATOR AND REFERENCE
SHDN = V+, RUN/ON3 = TIME/ON5 = 0V,
5.3V < V+ < 30V, 0mA < I < 50mA
VL Output Voltage
4.7
3.5
5.1
3.7
V
V
LOAD
VL Undervoltage Lockout
Fault Threshold
Falling edge, hysteresis = 1%
3.6
VL Switchover Threshold
REF Output Voltage
Rising edge of CSL5, hysteresis = 1%
No external load (Note 5)
4.2
4.5
2.5
4.7
2.55
12.5
100.0
V
V
2.45
0µA < I
< 50µA
< 5mA
LOAD
REF Load Regulation
mV
0mA < I
LOAD
REF Sink Current
10
µA
V
REF Fault Lockout Voltage
V+ Operating Supply Current
Falling edge
1.8
2.4
50
VL switched over to CSL5, 5V SMPS on
5
µA
V+ = 5.5V to 30V, both SMPSs off,
includes current into SHDN
V+ Standby Supply Current
30
60
µA
V+ Standby Supply Current
in Dropout
V+ = 4.2V to 5.5V, both SMPSs off,
includes current into SHDN
50
200
µA
µA
V+ Shutdown Supply Current
4
10
4
V+ = 4V to 24V, SHDN = 0V
(Note 3)
2.5
Both SMPSs enabled, FB3 = FB5 = 0V,
CSL3 = CSH3 = 3.5V,
CSL5 = CSH5 = 5.3V
Quiescent Power Consumption
mW
MAX1631/
MAX1634
1.5
4
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
