Step-up dc-dc controller, Absolute maximum ratings, Electrical characteristics – Rainbow Electronics MAX1771 User Manual
Page 2
MAX1771
12V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controller
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
V+ to GND ...............................................................-0.3V, 17V
EXT, CS, REF, SHDN, FB to GND ...................-0.3V, (V+ + 0.3V)
GND to AGND.............................................................0.1V, -0.1V
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
MAX1771C_ A .....................................................0°C to +70°C
MAX1771E_ A ..................................................-40°C to +85°C
MAX1771MJA ................................................-55°C to +125°C
Junction Temperatures
MAX1771C_ A/E_ A.......................................................+150°C
MAX1771MJA ..............................................................+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+ = 5V, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
85
110
µA
Standby Current
2
5
µA
4
Output Voltage (Note 1)
V
V+ = 2V to 12V, over full load range,
Circuit of Figure 2a
11.52
12.0
12.48
V+ = 5V to 7V, V
OUT
= 12V
I
LOAD
= 700mA, Circuit of Figure 2a
5
mV/V
V+ = 6V, V
OUT
= 12V, I
LOAD
= 0mA to
500mA, Circuit of Figure 2a
20
mV/A
Maximum Switch On-Time
t
ON
(max)
12
16
20
µs
Minimum Switch Off-Time
t
OFF
(min)
1.8
2.3
2.8
µs
%
Reference Voltage
V
REF
I
REF =
0
µA
MAX1771C
1.4700
1.5
1.5300
V
MAX1771E
1.4625
1.5
1.5375
MAX1771M
1.4550
1.5
1.5450
Output Voltage Line Regulation
(Note 2)
Output Voltage Load Regulation
(Note 2)
V+ = 5V, V
OUT
= 12V, I
LOAD
= 500mA,
Circuit of Figure 2a
V+ = 10V, SHDN
≥ 1.6V (shutdown)
V+ = 16.5V, SHDN
≥ 1.6V (shutdown)
V+ = 16.5V, SHDN = 0V (normal operation)
Minimum Start-Up Voltage
1.8
2.0
V
MAX1771 (internal feedback resistors)
2.0
12.5
MAX1771C/E (external resistors)
3.0
16.5
MAX1771MJA (external resistors)
3.1
16.5
Input Voltage Range
V
Efficiency
92
REF Load Regulation
0µA
≤ I
REF
≤ 100µA
MAX1771C/E
4
10
mV
MAX1771M
4
15
3V
≤ V+ ≤ 16.5V
40
100
FB Trip Point Voltage
V
FB
MAX1771C
1.4700
1.5
1.5300
V
MAX1771E
1.4625
1.5
1.5375
MAX1771M
1.4550
1.5
1.5450
µV/V
REF Line Regulation