MAX1966 データシートの表示（PDF） - Maxim Integrated
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MAX1966 Datasheet PDF : 15 Pages
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Low-Cost Voltage-Mode PWM
Step-Down Controllers
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND, Unless Otherwise Noted)
VIN to GND (MAX1966)............................................-0.3V to +6V
VIN to GND (MAX1967)..........................................-0.3V to +30V
VCC to GND (MAX1967)..........-0.3V, lower of 6V or (VIN + 0.3V)
FB to GND ................................................................-0.3V to +6V
DL, COMP/EN to GND (MAX1966) ................-0.3V to VIN + 0.3V
VL, DL, COMP/EN to GND (MAX1967).........-0.3V to VCC + 0.3V
BST to LX..................................................................-0.3V to +6V
DH to LX........................................................-0.3V to BST + 0.3V
VL Short to GND (MAX1967) ....................................................5s
RMS Input Current (any pin).............................................±50mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+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
(VIN = VL = VCC = 5V (MAX1967), VIN = 5V (MAX1966), TA = -40°C to +85°C (Note 1), unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
MAX1967 VIN Operating Range
CONDITIONS
MIN TYP MAX UNITS
4.9
28
V
MAX1967 Operating Range with
VIN = VL
2.7
5.5
V
MAX1966 VIN Operating Range
2.7
5.5
V
MAX1967 VL Undervoltage
Lockout (UVLO) Trip Level
Rising and falling edge, hysteresis = 2%
2.35 2.53 2.66
V
MAX1966 VIN UVLO
Trip Level
Rising and falling edge, hysteresis = 2%
2.35 2.53 2.66
V
Operating Supply Current
FB = 0.88V, no switching
0.7
3
mA
VL Output Voltage (MAX1967 Only)
5.5V < VIN < 28V, 1mA < IVL < 25mA,
FB = 0.88V
4.67
5
5.3
V
Thermal Shutdown (Note 1)
OSCILLATOR
Frequency
Minimum Duty Cycle
Maximum Duty Cycle
SOFT-START
Rising temperature, typical hysteresis = 10°C
0°C to +85°C
82
fOSC
-40°C to +85°C
79
90
160
°C
102
124
kHz
102
127
10
%
95
%
Digital Ramp Period
Internal 6-bit DAC for converter to ramp from
0 to full output voltage
1024 /
fOSC
s
Soft-Start Levels
VOUT /
64
V
ERROR AMPLIFIER
FB Regulation Voltage
(MAX1967)
FB Regulation Voltage
(MAX1966)
FB to COMP/EN Gain
2.7V < VCC < 5.5V, 0°C to +85°C
2.7V < VCC < 5.5V, -40°C to +85°C
2.7V < VIN < 5.5V, 0°C to +85°C
2.7V < VIN < 5.5V, -40°C to +85°C
0.787 0.800 0.815
V
0.782 0.800 0.815
0.787 0.800 0.815
V
0.782 0.800 0.815
4000
V/V
2 _______________________________________________________________________________________
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