5 V/3 .3 V o r Ad ju s t a b le , Hig h -Effic ie n c y,
Lo w -Dro p o u t , S t e p -Do w n DC-DC Co n t ro lle rs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to GND.......................................-0.3V, +17V
Operating Temperature Ranges
REF, SHDN, FB, CS, EXT, OUT.......................-0.3V, (V+ + 0.3V)
Continuous Power Dissipation (T = +70°C)
A
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C)..........................471mW
MAX1649C_A, MAX1651C_A ..............................0°C to +70°C
MAX1649E_A, MAX1651E_A............................-40°C to +85°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, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
16
UNITS
V+ Input Voltage Range
V+
V
OUT
< V+
3.0
V
V+ = 16V, SHDN ≤ 0.4V (operating, switch off)
V+ = 16V, SHDN ≥ 1.6V (shutdown)
V+ = 10V, SHDN ≥ 1.6V (shutdown)
MAX1649C, MAX1651C
78
2
100
Supply Current
I+
µA
49/MAX651
1
5
1.470
1.5
1.5
1.530
1.5375
±50
FB Trip Point
V
nA
V
MAX1649E, MAX1651E
1.4625
MAX1649C, MAX1651C
FB Input Current
Output Voltage
Reference Voltage
I
FB
MAX1649E, MAX1651E
±70
MAX1649, V+ = 5.5V to 16V
MAX1651, V+ = 3.6V to 16V
4.80
3.17
5.0
3.3
1.5
1.5
4
5.20
3.43
1.530
1.5375
10
Circuit of
Figure 1
V
OUT
MAX1649C, MAX1651C, I
= 0µA
= 0µA
1.470
1.4625
REF
REF
V
REF
V
MAX1649E, MAX1651E, I
REF Load Regulation
REF Line Regulation
0µA ≤ I
≤ 100µA, sourcing only
mV
REF
3V ≤ V+ ≤ 16V
40
100
µV/V
MAX1649, 5.5V ≤ V+ ≤ 16V,
= 1A
2.6
1.7
-47
-45
90
I
LOAD
Output Voltage
Line Regulation
Circuit of
Figure 1
mV/V
mV/A
%
MAX1651, 3.6V ≤ V+ ≤ 16V,
= 1A
I
LOAD
MAX1649, 0A ≤ I
≤ 1.5A,
LOAD
V
IN
= 10V
Output Voltage
Load Regulation
Circuit of
Figure 1
MAX1651, 0A ≤ I
= 5V
≤ 1.5A,
LOAD
V
IN
MAX1649, V+ = 10V,
= 1A
I
LOAD
Circuit of
Figure 1
Efficiency
MAX1651, V+ = 5V,
= 1A
90
I
LOAD
SHDN Input Current
V+ = 16V, SHDN = 0V or V+
3V ≤ V+ ≤ 16V
1
µA
V
SHDN Input Voltage High
SHDN Input Voltage Low
V
1.6
IH
V
IL
3V ≤ V+ ≤ 16V
0.4
V
2
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
