MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I
Q
Inverting DC-DC Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
V+ to OUT ...........................................................................21V
V+ to GND..............................................................-0.3V, +17V
OUT to GND ........................................................-0.3V, to -17V
REF, SHDN, FB, CS...................................-0.3V to (V+ + 0.3V)
EXT...............................................(V
OUT
- 0.3V) to (V+ + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C)..........................471mW
CERDIP (derate 8.00mW/°C above +70°C)..................640mW
Operating Temperature Ranges:
MAX77_C__.........................................................0°C to +70°C
MAX77_E__ ......................................................-40°C to +85°C
MAX77_MJA ...................................................-55°C to +125°C
Maximum Junction Temperatures:
MAX77_C__/E__...........................................................+150°C
MAX77_MJA..................................................................+175°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
ELECTRICAL CHARACTERISTICS
(V+ = 5V, I
LOAD
= 0mA, C
REF
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°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.
PARAMETER SYMBOL CONDITIONS
Output Voltage Line Regulation
(Circuit of Figure 2—
Bootstrapped)
MIN TYP MAX
UNITS
V+ Input Voltage Range V+ 3.0 16.5 V
Supply Current
V+ = 16.5V, SHDN ≤ 0.4V (operating)
MAX774, 4V ≤ V+ ≤ 15V, I
LOAD
= 0.5A
100
µA
0.035
mV/V
V+ = 10V, SHDN ≥ 1.6V (shutdown)
25
MAX776, 4V ≤ V+ ≤ 6V, I
LOAD
= 0.1A
0.137
V+ = 16.5V, SHDN ≥ 1.6V (shutdown)
4
FB Trip Point
3V ≤ V+ ≤ 16.5V
-10 10 mV
FB Input Current I
FB
MAX77_C
MAX775, 4V ≤ V+ ≤ 8V, I
LOAD
= 0.2A
±50
nA
0.088
MAX77_E ±70
MAX775, 0mA ≤ I
LOAD
≤ 500mA, V+ = 5V
1.5
MAX77_M ±90
Output Voltage Load Regulation
(Circuit of Figure 2—
Bootstrapped)
Output Voltage V
OUT
MAX774 -4.80 -5 -5.20
V
MAX774, 0A ≤ I
LOAD
≤ 1A, V+ = 5V
1.5
MAX775
mV/A
-11.52 -12 -12.48
MAX776, 0mA ≤ I
LOAD
≤ 400mA, V+ = 5V
MAX776
1.0
-14.40 -15 -15.60
Reference Voltage V
REF
I
REF
= 0µA
MAX77_C 1.4700 1.5 1.5300
VMAX77_E 1.4625 1.5 1.5375
MAX77_M 1.4550 1.5 1.5450
REF Load Regulation
0µA ≤ I
REF
≤ 100µA
MAX77_C/E 410
mV
MAX77_M 415
REF Line Regulation
3V ≤ V+ ≤ 16.5V
40 100
µV/V
(36 Seiten)
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