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参数资料
| 型号： | MAX5902LCETT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/14页 |
| 文件大小： | 333K |
| 描述： | IC HOT-SWAP CONTROLLER 6-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Simple Swapper™ |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 9 V ~ 72 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 供应商设备封装： | 6-TDFN 裸露焊盘（3x3） |
| 包装： | 带卷 (TR) |
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
_______________________________________________________________________________________ 7
A thermal shutdown feature protects the external MOS-
FET by turning it off if the die temperature of the
MAX5902/MAX5903 exceeds +125癈. The MAX5902/
MAX5903 must be in good thermal contact with the
external MOSFET. See Layout Guidelines in the Appli-
cations section of the data sheet.
A circuit-breaker function monitors the voltage across
the external MOSFET, V
SD
, and turns off the MOSFET if
V
SD
exceeds the circuit-breaker threshold, V
CB
. The
circuit-breaker function is enabled after the MOSFET is
fully enhanced. Three threshold voltage options are
available300mV, 400mV, and 500mV. One version is
available with no circuit-breaker function. Fault man-
agement for the MAX5902/MAX5903 is offered with two
different configurations; latched and automatic retry.
Latched Circuit Breaker
After a circuit-breaker trip event, the latched
versions (MAX5902L/MAX5903L) drive GATE to
V
S
, turning off the external MOSFET, and PGOOD
(PGOOD) is deasserted. A latched off condition
needs to be reset by toggling ON/OFF low for at
least 10ms, or by cycling the power supply, V
S
.
Automatic Retry Circuit Breaker
After a circuit-breaker trip event, the automatic retry
versions (MAX5902A/MAX5903A) drive GATE to V
S
,
turning off the external MOSFET, and PGOOD
(PGOOD) is deasserted. If the start conditions are met
for a full 150ms (t
RS
) the start sequence is re-initiated.
The start conditions are: the device is not in UVLO;
ON/OFF is not driven low; and the device is not in ther-
mal shutdown.
No Circuit Breaker
For the versions without a circuit breaker, MAX5902N
(MAX5903N), PGOOD (PGOOD) are asserted when the
MOSFET is fully enhanced. Once powered up the
MAX5902N/MAX5903N ignore the MOSFET drain-to-
source voltage for applications where a circuit-breaker
function is not desired.
Applications Information
ON/OFF Control Input
The ON/OFF control input provides three functions:
external ON/OFF control; setting of the UVLO level; and
resetting after a circuit-breaker event has caused the
MAX5902L/MAX5903L to turn off the external MOSFET.
Pulling ON/OFF to GND for at least 10ms (t
OFF
) forces
the MAX5902/MAX5903 to turn off the external MOSFET
(see Figure 3 for a circuit example). To reset the
MAX5902L/MAX5903L after a circuit-breaker event,
toggle ON/OFF to GND for at least 10ms (t
OFF
).
ON/OFF can be used to sequence power supplies.
Connecting a capacitor from ON/OFF to GND will delay
the rise of ON/OFF proportional to the capacitance and
input impedance of ON/OFF, typically 33k& (Figure 4).
The MAX5902/MAX5903 can be controlled by logic-
level signals. Logic-level signals of 3.3V or 1.8V may be
directly connected to ON/OFF. For 5V logic level control,
insert a series 47k& resistor as shown in Figure 5.
Figure 4. Power-Supply Sequencing
HOT-SWAP CONTROLLER #1
V
S
GND
C
2C
MAX5902
MAX5903
V
S
ON/OFF
HOT-SWAP CONTROLLER #2
GND
V
S
GND
MAX5902
MAX5903
ON/OFF
HOT-SWAP CONTROLLER
OPTIONAL
+24V
V
S
GND
R2
40.2k&
R1
3.01k&
MAX5902
MAX5903
GND
DGND
ON/OFF
ON/OFF
Figure 3. Programmed +18V Lockout, with Optional Optocoupler
On/Off Control.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5902LCEUT | 制造商:Maxim Integrated Products 功能描述:72V SOT23 SIMPLE SWAPPER HOT-SWAP CONTROLLER - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| MAX5902LCEUT+ | 制造商:Maxim Integrated Products 功能描述:72V SOT23 SIMPLE SWAPPER HOT-SWAP C - Rail/Tube |
| MAX5902LCEUT+T | 功能描述:热插拔功率分布 72V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5902LCEUT-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5902NNETT | 制造商:Maxim Integrated Products 功能描述:72V SOT23 SIMPLE SWAPPER HOT-SWAP C - Rail/Tube |
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