MAX640 MAXIM [Maxim Integrated Products], MAX640 Datasheet - Page 2

• Manufacturer Part Number: MAX640
• Description: 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters
• Manufacturer: MAXIM [Maxim Integrated Products]

ABSOLUTE MAXIMUM RATINGS
5V/3.3V/3V/Adjustable, High-Efficiency,
Low I
V+...........................................................................................12V
LX .........................................................(V+ - 12V) to (V+ + 0.3V)
LBI, LBO, VFB, SHDN, VOUT........................-0.3V to (V+ + 0.3V)
LX Output Current (Note 1) ......................................................1A
LBO Output Current ............................................................10mA
Continuous Power Dissipation (T
Note 1: Peak inductor current must be limited to 600mA by using an inductor of 100µH or greater.
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+ = 9V for the MAX639, V+ = 5V for the MAX640/MAX653, I
unless otherwise noted.)
2
Supply Voltage
Supply Current
Output Voltage (Note 2)
Dropout Voltage
Efficiency
Switch On-Time
Switch Off-Time
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
_______________________________________________________________________________________
PARAMETER
Q
, Step-Down DC-DC Converters
A
= +70°C)
SHDN = V+, no load
MAX639, V+ = 6.0V to 11.5V, 0mA < I
MAX640, V+ = 4.0V to 11.5V, 0mA < I
MAX653, V+ = 4.0V to 11.5V, 0mA < I
I
MAX639
MAX640
MAX653
MAX639
MAX640
MAX653
MAX639
MAX640
MAX653
OUT
= 100mA, L = 100µH
CONDITIONS
LOAD
I
I
I
I
I
I
V+ = 9V, V
V+ = 6V, V
V+ = 9V, V
V+ = 4V, V
V+ = 9V, V
V+ = 4V, V
V+ = 9V, V
V+ = 6V, V
V+ = 9V, V
V+ = 4V, V
V+ = 9V, V
V+ = 4V, V
OUT
OUT
OUT
OUT
OUT
OUT
= 0mA, T
Operating Temperature Ranges:
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
= 100mA, L = 100µH
= 25mA, L = 470µH
= 100mA, L = 100µH
= 25mA, L = 470µH
= 100mA, L = 100µH
= 25mA, L = 470µH
MAX639C_ _ .......................................................0°C to +70°C
MAX639E_ _ ....................................................-40°C to +85°C
MAX639MJA ..................................................-55°C to +125°C
OUT
OUT
OUT
A
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
< 100mA
< 100mA
< 100mA
= T
= 5V
= 3V
= 3.3V
= 3.3V
= 3V
= 3V
= 5V
= 3V
= 3.3V
= 3.3V
= 3V
= 3V
MIN
to T
MAX
, typical values are at T
4.80
3.17
2.88
10.6
14.2
60.7
42.5
16.6
13.3
13.3
14.6
14.6
MIN
4.0
7.5
7.1
9.0
TYP
5.00
3.30
3.00
12.5
16.7
71.4
50.0
11.7
19.5
15.6
15.6
17.2
17.2
0.5
8.8
8.3
10
91
94
87
91
85
89
MAX
11.5
5.20
3.43
3.12
14.4
19.2
10.1
82.1
57.5
13.5
22.4
17.9
17.9
19.8
19.8
9.5
A
20
= +25°C,
UNITS
µA
µs
µs
%
V
V
V