MAX5904 データシートの表示（PDF） - Maxim Integrated
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MAX5904 Datasheet PDF : 24 Pages
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Low-Voltage, Dual Hot-Swap Controllers/Power
Sequencers
Typical Operating Characteristics (continued)
(Typical Operating Circuits, Q1 = Q2 = Fairchild FDB7090L, VIN1 = +5V, VIN2 = +3.3V, TA = +25°C, unless otherwise noted. Channels
1 and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred to as X and Y.)
STARTUP WAVEFORMS
SLOW TURN-ON
MAX5904 toc18
VON
2V/div
VPGOOD
2V/div
AUTORETRY DELAY
MAX5904 toc19
VGATE
5V/div
IOUT
5A/div
VOUT
5V/div
VGATE
5V/div
VOUT
5V/div
IOUT
5A/div
1ms/div
VIN = 5.0V, RSENSE = 10mΩ, RTIM = 47kΩ,
CBOARD = 1000µF, CGATE = 22nF
40ms/div
VIN = 5.0V, RSENSE = 10mΩ, RTIM = 47kΩ,
CBOARD = 1000µF, RBOARD = 1.4Ω
PIN
MAX5904/
MAX5905
MAX5906–
MAX5909
—
1
—
2
1
3
2
4
3
5
4
6
—
7
—
8
—
9
Pin Description
NAME
FUNCTION
PGOOD
TIM
IN1
SENSE1
GATE1
GND
LIM1
MON1
MON2
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 RSENSE1 from IN1 to SENSE1.
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.
8 _______________________________________________________________________________________
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