MAX8741EAI Maxim Integrated, MAX8741EAI Datasheet - Page 5

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MAX8741EAI

Manufacturer Part Number
MAX8741EAI
Description
Current & Power Monitors & Regulators
Manufacturer
Maxim Integrated
Datasheet
ELECTRICAL CHARACTERISTICS
(V+ = 15V, both PWMs on, SYNC = V
INTERNAL REGULATOR AND REFERENCE
MAIN SMPS CONTROLLERS
Input Voltage Range
3V Output Voltage in Adjustable Mode
3V Output Voltage in Fixed Mode
5V Output Voltage in Adjustable Mode
5V Output Voltage in Fixed Mode
Output Voltage Adjust Range
Adjustable-Mode Threshold Voltage
Current-Limit Threshold
Oscillator Frequency
Maximum Duty Factor
SYNC Input Frequency Range
FLYBACK CONTROLLER
V
SECFB Regulation Threshold
V
V
12V LINEAR REGULATOR (MAX8742)
12OUT Output Voltage
Quiescent V
V
V
V
REF Output Voltage
REF Load Regulation
REF Sink Current
REF Fault-Lockout Voltage
V+ Operating Supply Current
DD
DD
DD
L
L
L
Output Voltage
Undervoltage-Lockout Fault Threshold
Switchover Threshold
500kHz Multi-Output Power-Supply Controllers
Regulation Threshold
Shunt Threshold
Shunt Sink Current
DD
PARAMETER
Current
_______________________________________________________________________________________
L
, V
with High Impedance in Shutdown
L
load = 0, REF load = 0, SKIP = 0, T
V+ = 4.2V to 30V, CSH3 - CSL3 = 0,
CSL3 connected to FB3
V+ = 4.2V to 30V, 0 < CSH3 - CSL3
< 80mV, FB3 = 0
V+ = 4.2V to 30V, CSH5 - CSL5 = 0,
CSL5 connected to FB5
V+ = 5.3V to 30V, 0 < CSH5 - CSL5
< 80mV, FB5 = 0
Either SMPS
Dual-mode comparator
CSH3 - CSL3 or CSH5 - CSL5
SKIP = V
SYNC = V
SYNC = 0
SYNC = V
SYNC = 0 (Note 2)
Falling edge (MAX8742)
Falling edge (MAX8741)
Rising edge, hysteresis = 1% (MAX8742)
V
13V < V
V
SHDN = V+, RUN/ON3 = TIME/ON5 = 0,
5.4V < V+ < 30V, 0 < I
Falling edge, hysteresis = 1%
Rising edge of CSL5, hysteresis = 1%
No external load (Note 4)
0 < I
0 < I
Falling edge
V
DD
DD
L
switched over to CSL5, 5V SMPS on
= 20V (MAX8742)
= 18V, run mode, no 12OUT load
LOAD
LOAD
DD
L
L
L
< 50µA
< 5mA
or V
< 18V, 0mA < I
DD
CONDITIONS
< 13V or SECFB < 2.44V
LOAD
LOAD
A
< 50mA
= -40°C to +85°C, unless otherwise noted.) (Note 6)
< 100mA
11.65
MIN
2.42
3.20
2.42
4.85
2.44
2.45
REF
450
283
400
4.2
0.5
-50
4.7
3.5
4.2
1.8
80
95
97
13
18
10
10
TYP
12.50
100.0
MAX
-150
30.0
2.58
3.47
2.58
5.25
2.60
2.55
12.5
120
550
383
583
100
5.5
1.1
5.1
3.7
4.7
2.4
14
20
50
UNITS
kHz
kHz
mA
mV
mV
µA
µA
µA
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
5

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