Step-down dc-dc controllers – Rainbow Electronics MAX652 User Manual
Page 2
MAX649/MAX651/MAX652
5V/3.3V/3V or Adjustable, High-Efficiency,
Low I
Q
, Step-Down DC-DC Controllers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = 5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°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.
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
1.455
1.5
1.545
1.4625
1.5
1.5375
FB Trip Point
1.470
1.5
1.530
V
I
Q
2
5
FB Input Current
I
FB
±50
nA
±70
±90
Output Voltage
V
OUT
4.80
5.0
5.20
V
Supply Current
V+ Input Voltage Range
V+
4.0
16.5
V
80
100
µA
4
3.17
3.3
3.43
2.88
3.0
3.12
Reference Voltage
V
REF
1.470
1.5
1.530
V
1.4625
1.5
1.5375
1.455
1.5
1.545
REF Load Regulation
4
10
mV
4
15
CONDITIONS
MAX649M, MAX65_M
Circuit of
Figure 1
MAX649E, MAX65_E
MAX649C, MAX65_C
V+ = 10V, SHDN
≥
1.6V (shutdown)
MAX649C, MAX65_C
MAX649E, MAX65_E
MAX649C, MAX65_C, I
REF
= 0
MAX649E, MAX65_E, I
REF
= 0
MAX649M, MAX65_M
MAX649M, MAX65_M, I
REF
= 0
V+ = 16.5V, SHDN
≤
0.4V (operating, switch off)
V+ = 16.5V, SHDN
≥
1.6V (shutdown)
Supply Voltage, V+ to GND.......................................-0.3V, +17V
REF, SHDN, FB, CS, EXT, OUT .......................-0.3V, (V+ + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C) ..........................471mW
CERDIP (derate 8.00mW/°C above +70°C) ..................640mW
Operating Temperature Ranges
MAX649C_A, MAX65_C_A ..................................0°C to +70°C
MAX649E_A, MAX65_E_A ................................-40°C to +85°C
MAX649MJA, MAX65_MJA ............................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX649, V+ = 6V to 16.5V
MAX651, V+ = 4V to 16.5V
MAX652, V+ = 4V to 16.5V
MAX649C/E, MAX65_C/E
MAX649M, MAX65_M
0
≤
I
REF
≤
100µA,
sourcing only
4V
≤
V+
≤
16.5V
REF Line Regulation
40
100
µV/V
2.6
mV/V
1.7
1.9
Output Voltage
Line Regulation
Circuit of
Figure 1
MAX649, 6V
≤
V+
≤
16V,
I
LOAD
= 1A
MAX651, 4.5V
≤
V+
≤
16V,
I
LOAD
= 1A
MAX652, 4V
≤
V+
≤
16V,
I
LOAD
= 1A