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| 型号： | MAX5903ABEUT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/14页 |
| 文件大小： | 333K |
| 描述： | IC HOT-SWAP CONTROLLER SOT23-6 |
| 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： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
_______________________________________________________________________________________ 5
Detailed Description
The MAX5902/MAX5903 are integrated hot-swap con-
troller ICs contained in 6-pin SOT23 and TDFN pack-
ages. They allow a board to be safely hot-plugged into
a live backplane without causing a glitch on the power-
supply rail. They are well suited for +48V power sys-
tems allowing cost-effective, simple, and compact
design. The MAX5902/MAX5903 operate from +9V to
+72V to cover a wide range of end equipment hot-swap
needs. They require only an external p-channel power
MOSFET to provide hot-swap control. Figure 1 shows a
functional block diagram of the MAX5902/MAX5903.
The MAX5902/MAX5903 controls an external p-channel
power MOSFET placed in the positive power-supply
pathway. When power is first applied, the MAX5902/
MAX5903 keep the MOSFET turned off. The
MAX5902/MAX5903 hold the MOSFET off indefinitely if
ON/OFF is held low, if the supply voltage is below the
undervoltage lockout level, or if the die temperature
exceeds +125癈. If none of these conditions exist for
150ms (typ), the MAX5902/MAX5903 begin to gradually
turn on the MOSFET. During this turn-on phase, the
MAX5902/MAX5903 slowly enhance the MOSFET,
allowing the voltage on the load, i.e. the drain of the
MOSFET, to rise at a rate of 9V/ms (typ). The inrush cur-
rent to the load is thus limited to a level proportional to
the load capacitance, and the constant slew rate. After
the MOSFET is fully enhanced, and the load voltage is
settled to its final value, the MAX5902A/ MAX5903A and
MAX5902L/MAX5903L monitor the voltage drop across
the MOSFET. If the voltage drop exceeds the circuit-
breaker threshold the MAX5902A/MAX5903A and
V
S
ON/OFF
GND
GND
GND
3V
MAX5902
MAX5903
828k&
*900k&
34.5k&
1k&
GATE
DRAIN
CONTROL
LOGIC
PGOOD
(PGOOD)
( ) ARE FOR THE MAX5903 ONLY
* RELATIVE TOLERANCE ?%, ABSOLUTE TOLERANCE ?0% (TYP)
*650k&
*
*
Figure 1. Functional Block Diagram
Pin Description
PIN
MAX
2
MAX5903
NAME
FUNCTION
1
1
V
S
Positive Supply Voltage Input and External p-Channel MOSFET Source Connection
2
2
DRAIN
Drain Sense Input for External p-Channel MOSFET. Connect DRAIN as close as
possible to the MOSFETs drain and use wide circuit traces to assure good thermal
coupling between the MAX5902/MAX5903 and the MOSFET. See Layout Guidelines
Section.
3
3
GATE
Gate Drive Output for External p-Channel MOSFET
4
4
GND
Ground Connection
5
PGOOD
Power-Good Output. PGOOD is an n-channel, open-drain, active-low output,
referenced to GND.
5
PGOOD
Power-Good Output. PGOOD is an n-channel, open-drain, active-high output,
referenced to GND.
6
6
ON/OFF
ON/OFF Control Input. ON/OFF is referenced to GND. Drive ON/OFF above 1.38V or
leave unconnected to enable the device. Drive ON/OFF below 1V to disable the device.
ON/OFF is also used to adjust the UVLO threshold. Internally clamped to nominally 3V
through a 1k& resistor (See Figure 1). (See the Undervoltage Lockout section in the
Applications Information.)
EP
Exposed Pad (TDFN only). Connect to GND.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5903ACETT | 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP SWITCHES - Rail/Tube |
| MAX5903ACETT+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP SWITCHES - Rail/Tube |
| MAX5903ACETT+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 |
| MAX5903ACETT-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 |
| MAX5903ACEUT | 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP SWITCHES - Cut Tape Product |
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