Electrical characteristics, Absolute maximum ratings – Rainbow Electronics MAX833 User Manual
Page 2
MAX830–MAX833
5V/3.3V/3V/Adjustable-Output, 1A,
Step-Down, PWM, Switch-Mode DC-DC Regulators
2
_______________________________________________________________________________________
MAX830–MAX833
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . . 50V
Switch Voltage with Respect to GND
(V
SW
negative) (Note 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
FB/SENSE Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +10V
SHUT Voltage (not to exceed V
IN
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
I
LIM
Voltage (forced). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . 0°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 25V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Note 1:
Do not exceed switch-to-input voltage limitation.
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
PARAMETER
CONDITIONS
Error-Amplifier Source Current
V
FB
= 2.0V (MAX830) or
V
SENSE
= 2.0V
(MAX831/832/833)
MIN
TYP
MAX
UNITS
100
140
225
Supply Current (Note 3)
I
LIM
open
mA
T
A
= +25°C
µA
T
A
= +25°C
Error-Amplifier Sink Current
V
FB
= 2.5V (MAX830) or
V
SENSE
= 5.5V
(MAX831/832/833)
1.2
1.7
2.2
Input Supply Voltage Range
8
30
V
0.6
1.0
1.7
mA
T
A
= +25°C
V
IN
= 25V, V
SW
= 0V
150
Switch-Off Leakage
V
IN
= 30V, V
SW
= 0V
250
µA
8
11
V
IN
≤
30V, V
SENSE
= 5.5V (MAX831/MAX832/
MAX833) or V
FB
= 2.5V (MAX830)
Minimum Supply Voltage (Note 5)
Normal mode
V
Startup mode
3.5
4.8
7.3
8.0
V
SHUT
= 0.1V (Note 4)
140
500
µA
1.2
Maximum Duty Cycle
Switch-Current Limit (Note 6)
85
90
%
0.8
A
Switching-Frequency Line Regulation
8V
≤
V
IN
≤
30V
0.03
0.10
%/V
Error-Amplifier Transconductance
Error-Amplifier Voltage Gain
1V
≤
V
C
≤
4V
2000
V/V
3000
5000
9000
µmho
R
LIM
= 10k
Ω
(Note 7)
T
A
= +25°C
R
LIM
= 7k
Ω
(Note 7)
T
A
= +25°C
T
A
= +25°C
Switch-On Voltage (Note 2)
I
SW
= 0.2A
1.1
V
I
SW
= 1A
1.4
90
100
110
Switching Frequency
V
FB
or V
SENSE
= 0V (Note 6)
85
120
20
kHz
T
A
= +25°C
T
A
= +25°C