MAX786S Просмотр технического описания (PDF) - Maxim Integrated
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MAX786S Datasheet PDF : 20 Pages
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Dual-Output Power-Supply
Controller for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
V+ to GND................................................................-0.3V to 36V
PGND to GND .......................................................................±2V
VL to GND ..................................................................-0.3V to 7V
BST3, BST5 to GND .................................................-0.3V to 36V
LX3 to BST3 ...............................................................-7V to 0.3V
LX5 to BST5 ...............................................................-7V to 0.3V
Inputs/Outputs to GND
(D1, D2, SHDN, ON5, REF, SS5, CS5,
FB5, SYNC, CS3,FB3, SS3, ON3) ............-0.3V to (VL + 0.3V)
VH to GND ...............................................................-0.3V to 20V
Q1, Q2 to GND ............................................-0.3V to (VH + 0.3V)
DL3, DL5 to PGND .......................................-0.3V to (VL + 0.3V)
DH3 to LX3 ..............................................-0.3V to (BST3 + 0.3V)
DH5 to LX5 ..............................................-0.3V to (BST5 + 0.3V)
REF, VL Short to GND................................................Momentary
REF Current ........................................................................20mA
VL Current ..........................................................................50mA
Continuous Power Dissipation (TA = +70°C)
SSOP (derate 9.52mW/°C above +70°C)....................762mW
Operating Temperature Ranges
MAX786CAI/MAX786_CAI .................................0°C to +70°C
MAX786EAI/MAX786_EAI ...............................-40°C to +85°C
Lead Temperature (soldering, 10sec) ............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = 15V, GND = PGND = 0V, IVL = IREF = 0mA, SHDN = ON3 = ON5 = 5V, other digital input levels are 0V or +5V,
TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
3.3V AND 5V STEP-DOWN CONTROLLERS
CONDITIONS
Input Supply Range
FB5 Output Voltage
FB3 Output Voltage
Load Regulation
Line Regulation
0mV < (CS5-FB5) < 70mV, 6V < V + < 30V
(includes load and line regulation)
MAX786
0mV < (CS3-FB3) < 70mV, 6V < V + < 30V
(includes load and line regulation)
MAX786R
MAX786S
Either controller (CS_ -FB_ = 0mV to 70mV)
Either controller (V+ = 6V to 30V)
Current-Limit Voltage
SS3/SS5 Source Current
CS3-FB3 or CS5-FB5
SS3/SS5 Fault Sink Current
INTERNAL REGULATOR AND REFERENCE
VL Output Voltage
VL Fault Lockout Voltage
ON5 = ON3 = 0V, 5.5V < V+ < 30V, 0mA < IL < 25mA
Falling edge, hysteresis = 1%
VL/FB5 Switchover Voltage
Rising edge of FB5, hysteresis = 1%
REF Output Voltage
REF Fault Lockout Voltage
No external load (Note 1)
Falling edge
REF Load Regulation
V+ Shutdown Current
0mA < IL < 5mA (Note 2)
–S—H—D—N– = D1 = D2 = ON3 = ON5 = 0V, V+ = 30V
V+ Standby Current
D1 = D2 = ON3 = ON5 = 0V, V+ = 30V
Quiescent Power Consumption D1 = D2 = 0V, FB5 = CS5 = 5.25V,
(both PWM controllers on)
FB3 = CS3 = 3.5V
V+ Off Current
FB5 = CS5 = 5.25V, VL switched over to FB5
COMPARATORS
D1, D2 Trip Voltage
D1, D2 Input Current
Falling edge, hysteresis = 1%
D1 = D2 = 0V, 5V
MIN TYP MAX UNITS
5.5
30
V
4.80 5.08 5.20
V
3.17 3.35 3.46
3.32 3.50 3.60
V
3.46 3.65 3.75
2.5
%
0.03
%/V
80
100
120
mV
2.5
4.0
6.5
µA
2
mA
4.5
5.5
V
3.6
4.2
V
4.2
4.7
V
3.24
3.36
V
2.4
3.2
V
30
75
mV
25
40
µA
70
120
µA
5.5
8.6
mW
30
60
µA
1.61
1.69
V
±100 nA
2 ________________________________________________________________________________________________
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