max5905 Maxim Integrated Products, Inc., max5905 Datasheet - Page 8

• Manufacturer Part Number: max5905
• Description: Low-voltage, Dual Hot-swap Controllers/power Sequencers
• Manufacturer: Maxim Integrated Products, Inc.

Low-Voltage, Dual Hot-Swap Controllers/Power
Sequencers
(Typical Operating Circuits, Q1 = Q2 = Fairchild FDB7090L, V
1 and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred to as X and Y.)
8
MAX5904/
MAX5905
_______________________________________________________________________________________
—
—
—
—
—
1
2
3
4
PIN
MAX5906–
MAX5909
1
2
3
4
5
6
7
8
9
V
IN
= 5.0V, R
C
STARTUP WAVEFORMS
BOARD
SLOW TURN-ON
SENSE
= 1000µF, C
PGOOD
SENSE1
GATE1
NAME
MON1
MON2
1ms/div
GND
LIM1
= 10mΩ, R
TIM
IN1
GATE
TIM
= 22nF
= 47kΩ,
Open-Drain Status Output. High impedance when startup is complete and no faults
are detected. Actively held low during startup and when a fault is detected.
Startup Timer Setting. Connect a resistor from TIM to GND to set the startup period.
Leave TIM unconnected for the default startup period of 9ms.
Channel 1 Supply Input. Connect to a supply voltage from 1V to 13.2V. Connect a
0.1µF ceramic bypass capacitor from IN1 to GND to filter high-frequency noise.
Channel 1 Current-Sense Input. Connect R
Channel 1 Gate-Drive Output. Connect to gate of external n-channel MOSFET.
Ground
Channel 1 Current-Limit Setting. Connect a resistor from LIM1 to GND to set
current-trip level. Connect to GND for the default 25mV threshold.
Channel 1 Output Voltage Monitor. Window comparator input. Connect through a
resistive-divider from OUT1 to GND to set the channel 1 overvoltage and
undervoltage thresholds. Connect to IN1 to disable.
Channel 2 Output Voltage Monitor. Window comparator input. Connect through a
resistive-divider from OUT2 to ground to set the channel 2 overvoltage and
undervoltage thresholds. Connect to IN2 to disable.
Typical Operating Characteristics (continued)
MAX5904 toc18
V
2V/div
V
2V/div
I
5A/div
V
5V/div
V
5V/div
OUT
ON
PGOOD
OUT
GATE
IN1
= +5V, V
IN2
= +3.3V, T
V
IN
= 5.0V, R
C
BOARD
AUTORETRY DELAY
FUNCTION
= 1000µF, R
SENSE
A
= +25°C, unless otherwise noted. Channels
40ms/div
SENSE1
= 10mΩ, R
BOARD
TIM
from IN1 to SENSE1.
= 1.4Ω
= 47kΩ,
MAX5904 toc19
Pin Description
V
5V/div
V
5V/div
I
5A/div
OUT
GATE
OUT