5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
MAX1626/MAX1627
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to GND.......................................-0.3V, +17V
OUT, FB,
3/5,
SHDN, REF, CS, EXT to GND ...-0.3V, (V+ + 0.3V)
Maximum Current at REF (I
REF
) ..........................................15mA
Maximum Current at EXT (I
EXT
) ..........................................50mA
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 5.88mW/°C above +70°C) ..........................471mW
Operating Temperature Range
MAX1626ESA/MAX1627ESA ............................-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+ = +3V to +16.5V, SHDN =
3/5
= 0V, T
A
= 0°C to +85°C, unless otherwise noted.)
PARAMETER
Input Voltage Range
Supply Current into V+
Undervoltage Lockout
Output Voltage
OUT Input Current
FB Threshold Voltage
FB Leakage Current
CS Input Current
CS Threshold Voltage
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Input Current
3/5
Input Voltage High
3/5
Input Voltage Low
3/5
Leakage Current
EXT Resistance
Minimum EXT Off Time
EXT Duty-Cycle Limit
Line Regulation
Load Regulation
Reference Voltage
REF Load Regulation
REF Line Regulation
V
REF
6.0V < V+ < 12.0V, I
LOAD
= 1A
30mA < I
LOAD
< 2.0A, V+ = 8V
I
LOAD
= 0µA
0µA
≤
I
REF
≤
100µA
V+ = 3V to 16.5V, I
LOAD
= 0µA
1.27
3/5
= 0V or V+
V+ = 5V
Output forced to 0V
Output in regulation
8
1.5
100
5
15
1.30
4
10
1.33
10
100
10
10
2.0
12
2.5
SHDN = 0V or V+
V+ - 0.5
0.5
±1
V
CS
V
OUT
I
OUT
Circuit of Figure 1,
3/5
= V+ (Note 1)
Circuit of Figure 1,
3/5
= 0V (Note 1)
MAX1626,
3/5
= V+, output forced to 5V
MAX1627, includes hysteresis
MAX1627
4.85
3.20
24
1.27
0
0
85
1.6
0.4
±1
100
SYMBOL
V+
I+
Operating, no load
V+ = SHDN = 16.5V (shutdown)
2.7
5.00
3.30
37
1.30
CONDITIONS
MIN
3.0
70
TYP
MAX
16.5
90
1
2.8
5.15
3.40
50
1.33
35
10
115
UNITS
V
µA
V
V
µA
V
nA
µA
mV
V
V
µA
V
V
µA
Ω
µs
%
mV/V
mV/A
V
mV
µV/V
2
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
