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
Input Voltage Range
Minimum Start-Up Voltage
Supply Current
Standby Current
Output Voltage (Note 1)
Output Voltage Line Regulation
(Note 2)
Output Voltage Load Regulation
(Note 2)
Maximum Switch On-Time
Minimum Switch Off-Time
Efficiency
t
ON
(max)
t
OFF
(min)
V+ = 5V, V
OUT
= 12V, I
LOAD
= 500mA,
Circuit of Figure 2a
MAX1771C
Reference Voltage
V
REF
I
REF =
0µA
MAX1771E
MAX1771M
REF Load Regulation
REF Line Regulation
FB Trip Point Voltage
V
FB
0µA
≤
I
REF
≤
100µA
3V
≤
V+
≤
16.5V
MAX1771C
MAX1771E
MAX1771M
1.4700
1.4625
1.4550
MAX1771C/E
MAX1771M
1.4700
1.4625
1.4550
V+ = 16.5V, SHDN = 0V (normal operation)
V+ = 10V, SHDN
≥
1.6V (shutdown)
V+ = 16.5V, SHDN
≥
1.6V (shutdown)
V+ = 2V to 12V, over full load range,
Circuit of Figure 2a
V+ = 5V to 7V, V
OUT
= 12V
I
LOAD
= 700mA, Circuit of Figure 2a
V+ = 6V, V
OUT
= 12V, I
LOAD
= 0mA to
500mA, Circuit of Figure 2a
12
1.8
11.52
SYMBOL
CONDITIONS
MAX1771 (internal feedback resistors)
MAX1771C/E (external resistors)
MAX1771MJA (external resistors)
MIN
2.0
3.0
3.1
1.8
85
2
4
12.0
5
12.48
TYP
MAX
12.5
16.5
16.5
2.0
110
5
V
µA
µA
V
mV/V
V
UNITS
20
16
2.3
92
1.5
1.5
1.5
4
4
40
1.5
1.5
1.5
1.5300
1.5375
1.5450
10
15
100
1.5300
1.5375
1.5450
20
2.8
mV/A
µs
µs
%
V
mV
µV/V
V
2
Maxim Integrated
MAX1771
12V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controller
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETERS
SYMBOL
MAX1771C
FB Input Current
I
FB
MAX1771E
MAX1771M
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current
Current-Limit Trip Level
CS Input Current
EXT Rise Time
EXT Fall Time
V+ = 5V, 1nF from EXT to ground
V+ = 5V, 1nF from EXT to ground
V
CS
V
IH
V
IL
V+ = 2V to 16.5V
V+ = 2V to 16.5V
V+ = 16.5V, SHDN = 0V or V+
V+ = 5V to 16V
MAX1771C/E
MAX1771M
85
75
100
100
0.01
55
55
1.6
0.4
±1
115
125
±1
CONDITIONS
MIN
TYP
MAX
±20
±40
±60
V
V
µA
mV
µA
ns
ns
nA
UNITS
Note 1:
Output voltage guaranteed using preset voltages. See Figures 4a–4d for output current capability versus input voltage.
Note 2:
Output voltage line and load regulation depend on external circuit components.
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