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參數(shù)資料
| 型號： | MAX5918LEEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low-Voltage, Dual Hot-Swap Controllers with Independent ON/OFF Control |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 0.150 INCH, QSOP-16 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大?。?/td> | 443K |
| 代理商： | MAX5918LEEE |
M
Detailed Description
The MAX5918 and MAX5919 are circuit breaker ICs for
hot-swap applications where a line card is inserted into
a live backplane. The MAX5918 and MAX5919 operate
down to 1V provided one of the inputs is above 2.7V.
Normally, when a line card is plugged into a live back-
plane, the card
’
s discharged filter capacitors provide
low impedance that can momentarily cause the main
power supply to collapse. The MAX5918 and MAX5919
reside either on the backplane or on the removable
card to provide inrush current limiting and short-circuit
protection. This is achieved by using external N-chan-
nel MOSFETs, external current-sense resistors, and two
on-chip comparators. The startup period and current-
limit threshold of the MAX5918/MAX5919 can be
adjusted with external resistors. Figure 1 shows the
MAX5918/MAX5919 functional diagram.
The MAX5918/MAX5919 pull both PGOODs low and
both external FETs off for an overcurrent condition. The
MAX5918 also pulls both PGOODs low and both exter-
nal FETs off (protection) for an undervoltage/overvoltage
fault, whereas, the MAX5919 ONLY pulls the corre-
sponding fault channel
’
s PGOOD low (monitoring).
When the overvoltage/undervoltage fault disappears on
the MAX5919, the corresponding PGOOD automatically
goes high impedance.
Low-Voltage, Dual Hot-Swap Controllers with
Independent ON/OFF Control
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
PGOOD1
Channel 1 Status Output (Open Drain, see
Absolute Maximum Ratings
). PGOOD1 asserts high when hot
swap is successful and channel 1 is within regulation. PGOOD1 asserts low during startup, when ON1 is
low, when channel 1 is off, or when channel 1 has any fault condition.
2
TIM
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.
3
IN1
Channel 1 Supply Input. Connect to a supply voltage of 1V to 13.2V.
4
SENSE1
Channel 1 Current-Sense Input. Connect R
SENSE1
from IN1 to SENSE1. Connect to IN1 to disable circuit
breaker function of channel 1.
5
6
GATE1
GND
Channel 1 Gate-Drive Output. Connect to gate of external N-channel MOSFET.
Ground
7
LIM1
Channel 1 Current-Limit Setting. Connect a resistor from LIM1 to GND to set the current trip level. Connect to
GND for the default 25mV threshold (see the
Slow-Comparator Threshold, R
LIM
section).
8
MON1
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 threshold. Connect to IN1 to disable.
9
MON2
Channel 2 Output-Voltage Monitor. Window comparator input. Connect through a resistive-divider from
OUT2 to GND to set the channel 2 overvoltage and undervoltage threshold. Connect to IN2 to disable.
10
LIM2
Channel 2 Current-Limit Setting. Connect a resistor from LIM2 to GND to set the current trip level. Connect to
GND for the default 25mV threshold (see the
Slow-Comparator Threshold, R
LIM
section).
Channel 1 On/Off Control Input. Channel 1 is turned on when V
ON1
> 0.875V.
Channel 2 Gate-Drive Output. Connect to gate of external N-channel MOSFET.
11
12
ON1
GATE2
13
SENSE2
Channel 2 Current-Sense Input. Connect R
SENSE2
from IN2 to SENSE2. Connect to IN2 to disable circuit
breaker function of channel 2.
14
15
IN2
ON2
Channel 2 Supply Input. Connect to a supply voltage of 1V to 13.2V.
Channel 2 On/Off Control Input. Channel 2 is turned on when V
ON2
> 0.875V.
Channel 2 Status Output (Open Drain, see
Absolute Maximum Ratings
). PGOOD2 asserts high when hot
swap is successful and channel 2 is within regulation. PGOOD2 asserts low during startup, when V
ON2
is
low, when channel 2 is off, or when channel 2 has any fault condition.
16
PGOOD2
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|---|---|
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| MAX5918AEEE | Low-Voltage, Dual Hot-Swap Controllers with Independent ON/OFF Control |
| MAX5920 | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CFP -55 to 125 |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5918LEEE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5919AEEE | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE, DUAL HOT-SWAP CONTROLLERS WITH I - Rail/Tube |
| MAX5919AEEE-T | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE, DUAL HOT-SWAP CONTROLLERS WITH I - Tape and Reel |
| MAX5919LEEE | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE, DUAL HOT-SWAP CONTROLLERS WITH I - Rail/Tube |
| MAX5919LEEE+ | 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 16QSOP - Rail/Tube |
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