MAX746C/D Ver la hoja de datos (PDF) - Maxim Integrated
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MAX746C/D Datasheet PDF : 16 Pages
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High-Efficiency, PWM, Step-Down,
N-Channel DC-DC Controller
ABSOLUTE MAXIMUM RATINGS
Supply Voltage V+, AV+ to GND ..............................-0.3V to 17V
HIGH, EXT to GND....................................................-0.3V to 21V
AGND to GND..........................................................-0.3V to 0.3V
All Other Pins................................................-0.3V to (V+ + 0.3V)
Reference Current (IREF) ....................................................±2mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
Narrow SO (derate 8.70mW/°C above +70°C) ............696mW
CERDIP (derate 10.00mW/°C above +70°C) ...............800mW
Operating Temperature Ranges:
MAX746C_E ........................................................0°C to +70°C
MAX746E_E .....................................................-40°C to +85°C
MAX746MJE ..................................................-55°C to +125°C
Junction Temperatures:
MAX746C_E/E_E..........................................................+150°C
MAX746MJE.................................................................+175°C
Storage Temperature Range .............................-65°C to +160°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+ = 10V, ILOAD = 0A, IREF = 0µA, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Voltage
V+
4
Output Voltage
VOUT
V+ = 6V to 15V, 0V < (V+ - CS) < 0.125V,
FB = 0V (includes line and load regulation)
4.85
Feedback Voltage
Line Regulation
Load Regulation
VFB
(V+ - CS) = 0V,
external feedback mode
MAX746C
1.96
MAX746E/M 1.95
V+ = 6V to 15V, FB = 0V
V+ = 4V to 15V, external feedback mode
0V < (V+ - CS) < 0.125V
Efficiency
Circuit of Figure 1, ILOAD = 0.5A to 2.5A,
V+ = 6V
OUT Leakage Current
FB Input Logic Low
FB Input Leakage Current
Reference Voltage
Reference Load Regulation
Soft-Start Source Current
Soft-Start Fault Current (Note 1)
Supply Current (Note 2)
Oscillator Frequency
VOUT = 5V
For dual-mode switchover
FB = 2V
VREF
IREF = 0µA
IREF = 0µA to 100µA
SS = 0V
SS = 2V
ISUPP
Operating, V+ = 15V
Operating, V+ = 10V
Shutdown mode
fOSC
MAX746C
1.97
MAX746E/M 1.96
0.5
100
MAX746C
MAX746E/M
MAX746C
85
MAX746E/M 80
TYP MAX UNITS
15
V
5.08 5.25
V
2.00 2.04
V
2.00 2.05
0.05
%/V
0.1
1.3
2.5
%
94
%
50
80
µA
40
mV
1
100
nA
2.00 2.03
V
2.00 2.04
9
20
mV
1.0
1.5
µA
500
µA
1.1
1.4
1.7
mA
0.95
1.4
20
µA
100 115
kHz
100 120
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