MAX1966 Maxim, MAX1966 Datasheet - Page 2

• Manufacturer Part Number: MAX1966
• Description: Low-Cost Voltage-Mode PWM Step-Down Controllers
• Manufacturer: Maxim

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 (V
FB to GND ................................................................-0.3V to +6V
DL, COMP/EN to GND (MAX1966) ................-0.3V to V
VL, DL, COMP/EN to GND (MAX1967).........-0.3V to V
BST to LX..................................................................-0.3V to +6V
DH to LX........................................................-0.3V to BST + 0.3V
Low-Cost Voltage-Mode PWM
Step-Down Controllers
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), T
T
2
A
MAX1967 VIN Operating Range
MAX1967 Operating Range with
VIN = VL
MAX1966 VIN Operating Range
MAX1967 VL Undervoltage
Lockout (UVLO) Trip Level
MAX1966 VIN UVLO
Trip Level
Operating Supply Current
V L Outp ut V ol tag e ( M AX 1967 Onl y)
Thermal Shutdown (Note 1)
OSCILLATOR
Frequency
Minimum Duty Cycle
Maximum Duty Cycle
SOFT-START
Digital Ramp Period
Soft-Start Levels
ERROR AMPLIFIER
FB Regulation Voltage
(MAX1967)
FB Regulation Voltage
(MAX1966)
FB to COMP/EN Gain
= +25°C.)
_______________________________________________________________________________________
PARAMETER
SYMBOL
f
OSC
Rising and falling edge, hysteresis = 2%
Rising and falling edge, hysteresis = 2%
FB = 0.88V, no switching
5.5V < VIN < 28V, 1mA < I
FB = 0.88V
Rising temperature, typical hysteresis = 10°C
0°C to +85°C
-40°C to +85°C
Internal 6-bit DAC for converter to ramp from
0 to full output voltage
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
CC
IN
IN
+ 0.3V)
+ 0.3V
+ 0.3V
A
= -40°C to +85°C (Note 1), unless otherwise noted. Typical values are at
CONDITIONS
VL Short to GND (MAX1967) ....................................................5s
RMS Input Current (any pin).............................................±50mA
Continuous Power Dissipation (T
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
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
VL
< 25mA,
0.787
0.782
0.787
0.782
2.35
2.35
4.67
MIN
4.9
2.7
2.7
82
79
90
A
= +70°C)
V
1024 /
0.800
0.800
0.800
0.800
f
4000
TYP
2.53
2.53
OSC
OUT
160
102
102
0.7
64
95
5
/
0.815
0.815
0.815
0.815
MAX
2.66
2.66
124
127
5.5
5.5
5.3
28
10
3
UNITS
kHz
mA
V/V
°C
%
%
V
V
V
V
V
V
V
V
V
s