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參數資料
| 型號： | MAX5937LCESA+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 7/23頁 |
| 文件大小： | 382K |
| 描述： | IC HOT-SWAP CTRLR -48V 8-SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 電源電壓： | -10 V ~ -80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
-48V Hot-Swap Controllers with V
IN
Step Immunity and No R
SENSE
_______________________________________________________________________________________ 7
Detailed Description
The MAX5936/MAX5937 hot-swap controllers incorpo-
rate overcurrent fault management and are intended for
negative-supply-rail applications. The MAX5936/
MAX5937 eliminate the need for an external R
SENSE
and include V
IN
input-step protection and load probe,
which prevents powering up into a shorted load. They
are intended for negative 48V telecom power systems
where low cost, flexibility, multifault management, and
compact size are required. The MAX5936/MAX5937 are
ideal for the widest range of systems from those
requiring low current with small MOSFETs to high-
current systems requiring large power MOSFETs and
low on-resistance.
The MAX5936/MAX5937 control an external n-channel
power MOSFET placed in the negative supply path of
an external load. When no power is applied, the GATE
output of the MAX5936/MAX5937 clamps the V
GS
of the
MOSFET to 2V, keeping the MOSFET turned off. When
power is applied to the MAX5936/MAX5937, the 2V
clamp at the GATE output is replaced by a strong pull-
down device pulling GATE to V
EE
and the V
GS
of the
MOSFET to 0V. As shown in Figure 2, this transition
enables the MAX5936/MAX5937 to keep the power
MOSFET continually off during the board insertion
phase when the circuit board first makes contact with
the backplane. Without this clamp, the GATE output of
a powered-down controller would be floating and the
MOSFET reverse transfer capacitance (gate-to-drain)
would pull up and turn on the MOSFET gate when the
MOSFET drain is rapidly pulled up by the V
IN
step dur-
ing backplane contact. The MAX5936/MAX5937 GATE
clamp can overcome the gate-to-drain capacitance of
large power MOSFETs with added slew-rate control
(C
SLEW
) capacitors while eliminating the need for addi-
tional gate-to-source capacitance. The MAX5936/
MAX5937 will keep the MOSFET off indefinitely if the
supply voltage is below the user-set UVLO threshold or
if a short circuit is detected in the load connected to the
drain of the power MOSFET.
PIN
MAX5936 MAX5937
NAME
FUNCTION
1
1
GND
Ground. The high-supply connection for a negative-rail hot-swap controller.
2
2
UVLO
Undervoltage Lockout Input, On/Off Control. Referenced to V
EE
. Drive UVLO above the
1.25V rising threshold to turn on the device. To turn off the device, drive UVLO below the
1.125V falling threshold for the 1.5ms glitch rejection period. Leave UVLO disconnected for
the default 31V undervoltage lockout threshold. Cycle UVLO to unlatch the MAX5936L/
MAX5937L after a fault. Cycling UVLO low deasserts PGOOD.
3
3
STEP_MON
Input Voltage Step Monitor. 1.25V voltage threshold referenced to V
EE
. Connect a resistor
between STEP_MON and V
EE
to set the step sensitivity. Connect a capacitor from GND to
STEP_MON to adjust the step response relative to a step increase at V
EE
to eliminate false
circuit-breaker and short-circuit faults. Connect to V
EE
to disable the step immunity function
(see the Selecting Resistor and Capacitor Values for Step Monitor section in the
Applications Information).
4
4
V
EE
Negative Input Voltage
5
5
LP
Load-Probe Detect. Connect a resistor from LP to V
OUT
to set the load-probe test current.
Limit load-probe test current to 1A. Connect to V
EE
to disable the load-probe function.
6
6
GATE
Gate-Drive Output. Connect to the gate of the external n-channel MOSFET.
7
7
V
OUT
Output Voltage Sense. V
OUT
is the negative rail of the load. Connect to the drain of the
external n-channel MOSFET.
8
PGOOD
Power-Good, Active-Low, Open-Drain Output. Referenced to V
OUT
. PGOOD asserts low
when V
OUT
is within the limits and there is no fault.
8
PGOOD
Power-Good, Active-High, Open-Drain Output. Referenced to V
OUT
. PGOOD asserts high
when V
OUT
is within limits and there is no fault.
Pin Description
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5937LCESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LCESA+T | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LCESA-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LNESA | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LNESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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