MAX5911 查看數據表（PDF） - Maxim Integrated
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MAX5911 Datasheet PDF : 8 Pages
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-48V Simple Swapper Hot-Swap Switches
Typical Operating Characteristics (continued)
(VIN = -48V, AGND = DGND = 0, UVLO = open circuit, VENABLE = +3.3V, RLOAD = 1.8kΩ, TA = +25°C, unless otherwise noted.)
MAX5912 TURN-OFF WAVEFORMS
MAX5912
MAX5912
(RL = 1.8kΩ, CL = 47µF)
MAX5911 toc13
OVERCURRENT RESPONSE
MAX5911 toc14
ZERO-CURRENT RESPONSE
MAX5911 toc15
A
A
A
0
0
0
0
0
0
B
B
B
C
0
t = 100ms/div
A: ENABLE, 5V/div
C: FAULT, 2V/div
B: VOUT, 20V/div
0
C
t = 40ms/div
A: FAULT, 5V/div
B: VOUT, 20V/div
C: IOUT, 200mA/div
0
C
t = 40ms/div
A: FAULT, 5V/div
B: VOUT, 20V/div
C: IOUT, 100mA/div
PIN
MAX5911
MAX5912
1
3
2
4, 5, 12, 13
3
6
4
7
5
10
6
11
7
14
8
15
—
1, 2, 8, 9, 16
Pin Description
NAME
FUNCTION
GATE
VIN
FAULT
DGND
ENABLE
AGND
VOUT
UVLO
N.C.
Gate of the Internal Power MOSFET. Normally leave open circuit. To slow
down the output voltage ramp, connect two capacitors, one to VIN and one to
VOUT. See GATE Connections for details.
Voltage Input Terminal. Bypass VIN, to AGND with a 0.1µF capacitor to
improve noise immunity.
Fault Logic Output, open-drain. Tie FAULT to the positive logic supply with a
3.3kΩ resistor. Referenced to DGND.
Digital Ground. Ground reference level for the external positive logic, FAULT,
and ENABLE. DGND can vary up to ±5V with respect to AGND to
accommodate differential ground voltages in large systems.
ENABLE Input. Turns on and off the internal FET. ENABLE is a positive logic-
level input referenced to DGND. Drive ENABLE high to enable VOUT. Drive
ENABLE low to disable VOUT. Pulse ENABLE low to reset the MAX5911/
MAX5912 after a latched fault condition occurs.
Analog Ground. Ground reference level for VIN, VOUT, and UVLO.
Voltage Output Terminal
Undervoltage Lockout Input. Leave UVLO open circuit for default setting
of -28V. Alternatively, UVLO can be connected to a resistive divider to set the
lockout voltage (see the Changing the Undervoltage Lockout Setting section).
The comparator threshold level is +1.258V with respect to VIN.
No Connection. No internal connection.
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