MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = +3V to +16.5V, SHDN = 3/5 = 0V, T
A
= 0°C to +85°C, unless otherwise noted.)
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.
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
0µA ≤ I
REF
≤ 100µA
I
LOAD
= 0µA
30mA < I
LOAD
< 2.0A, V+ = 8V
V+ = SHDN = 16.5V (shutdown)
6.0V < V+ < 12.0V, I
LOAD
= 1A
Operating, no load
Output in regulation
Output forced to 0V
V+ = 5V
3/5 = 0V or V+
MAX1627
Circuit of Figure 1, 3/5 = V+ (Note 1)
MAX1626, 3/5 = V+, output forced to 5V
SHDN = 0V or V+
MAX1627, includes hysteresis
CONDITIONS
mV410REF Load Regulation
V1.27 1.30 1.33V
REF
Reference Voltage
mV/A15Load Regulation
mV/V5Line Regulation
%100EXT Duty-Cycle Limit
µs
1.5 2.0 2.5
81012
Minimum EXT Off Time
Ω10EXT Resistance
µA±1
3/5 Leakage Current
V0.5
3/5 Input Voltage Low
VV+ - 0.5
3/5 Input Voltage High
µA±1SHDN Input Current
V0.4SHDN Input Voltage Low
µA
1
I+Supply Current into V+
70 90
V3.0 16.5V+Input Voltage Range
V1.6SHDN Input Voltage High
mV85 100 115V
CS
CS Threshold Voltage
µA010CS Input Current
nA035FB Leakage Current
V2.7 2.8Undervoltage Lockout
4.85 5.00 5.15
µA24 37 50I
OUT
OUT Input Current
V1.27 1.30 1.33FB Threshold Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
V+ = 3V to 16.5V, I
LOAD
= 0µA µV/V10 100REF Line Regulation
Circuit of Figure 1, 3/5 = 0V (Note 1)
V
3.20 3.30 3.40
V
OUT
Output Voltage
(10 Seiten)
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