Electrical characteristics, Absolute maximum ratings – Rainbow Electronics MAX729 User Manual
Page 2
MAX727/MAX728/MAX729
5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
2
_______________________________________________________________________________________
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . . 50V
Switch Voltage with Respect to GND Pin (V
SW
negative)
(Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
SENSE Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +10V
Operating Temperature Ranges
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
MAX72_ECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Ranges:
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +125°C
MAX72_ECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 25V, T
j
= T
MIN
to T
MAX
, 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.
ABSOLUTE MAXIMUM RATINGS
mA
3.5
4.8
Start-Up Mode (Note 4)
V
7.3
8.0
Normal Mode
Minimum Supply Voltage
8.5
11
V
IN
≤
40V, V
SENSE
= 5.5V
T
j
= +25°C
µA
250
T
j
= +25°C
T
j
= +25°C
V
IN
= 40V, V
SW
= 0V
Switch-Off Leakage
T
j
= +25°C
T
j
= +25°C
mA
T
j
≤
+125°C
150
0.6
1.0
1.7
V
SENSE
= V
OUT
+ 10%
V
IN
= 25V, V
SW
= 0V
Error-Amplifier Sink Current
µA
T
j
= +25°C
100
140
225
V
SENSE
= V
OUT
- 10%
Error-Amplifier Source Current
µmho
1.7
3000
5000
9000
I
SW
= 2A
Error-Amplifier Transconductance
V/V
V
1.2
2000
1V
≤
V
C
≤
4V
I
SW
= 0.5A
Error-Amplifier Voltage Gain
Switch-On Voltage (Note 2)
%/V
0.03
0.10
kHz
Switching Frequency
20
V
OUT
= V
SENSE
= 0V (Note 5)
85
120
T
j
= +25°C
90
100
110
T
j
= +25°C
%
85
90
Maximum Duty Cycle
8V
≤
V
IN
≤
40V
Switching Frequency Line Regulation
UNITS
MIN
TYP
MAX
3.5
5.0
CONDITIONS
PARAMETER
Supply Current (Note 3)
2.0
2.6
3.2
A
Switch-Current Limit (Note 5)
V
8.0
40.0
Input Supply Voltage Range
T
j
≥
0°C
T
j
< 0°C