5 V/3 .3 V o r Ad ju s t a b le , 1 0 0 % Du t y-Cyc le ,
Hig h -Effic ie n c y, 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 Range
OUT, FB, 3/5, SHDN, REF, CS, EXT to GND...-0.3V, (V+ + 0.3V)
MAX1626ESA/MAX1627ESA ............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Maximum Current at REF (I )..........................................15mA
REF
Maximum Current at EXT (I ) ..........................................50mA
EXT
Continuous Power Dissipation (T = +70°C)
A
SO (derate 5.88mW/°C above +70°C)..........................471mW
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 = 0°C to +85°C, unless otherwise noted.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
16.5
90
UNITS
Input Voltage Range
V+
3.0
V
Operating, no load
70
Supply Current into V+
Undervoltage Lockout
Output Voltage
I+
µA
V
/MAX1627
V+ = SHDN = 16.5V (shutdown)
1
2.7
5.00
3.30
37
2.8
5.15
3.40
50
4.85
3.20
24
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
V
OUT
V
OUT Input Current
I
µA
V
OUT
FB Threshold Voltage
FB Leakage Current
CS Input Current
1.27
0
1.30
1.33
35
nA
µA
mV
V
0
10
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
V
CS
85
100
115
1.6
0.4
±1
V
SHDN = 0V or V+
µA
V
V+ - 0.5
0.5
±1
V
µA
Ω
3/5 = 0V or V+
V+ = 5V
10
10
Output forced to 0V
Output in regulation
8
12
Minimum EXT Off Time
µs
1.5
100
2.0
2.5
EXT Duty-Cycle Limit
Line Regulation
%
6.0V < V+ < 12.0V, I
= 1A
5
15
1.30
4
mV/V
mV/A
V
LOAD
Load Regulation
30mA < I
< 2.0A, V+ = 8V
LOAD
Reference Voltage
REF Load Regulation
REF Line Regulation
V
REF
I
= 0µA
1.27
1.33
10
LOAD
0µA ≤ I
≤ 100µA
mV
REF
V+ = 3V to 16.5V, I
= 0µA
10
100
µV/V
LOAD
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
