Datasheet > MAX5954

MAX5954

更新时间： 2024-10-15 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		PC 控制器
页数	文件大小	规格书
22页	2077K
描述
单通道PCI Express、热插拔控制器

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中文翻译

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数据手册

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MAX5954 数据手册

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MAX5954

Single PCI Express, Hot-Plug Controller

General Description

Features

The MAX5954 hot-plug controller is designed for PCI

Express™ applications. The device provides hot-plug

control for 12V, 3.3V, and 3.3V auxiliary supplies of a

single PCI Express (PCI-E) slot. The MAX5954’s logic

inputs/outputs allow interfacing directly with the system

hot-plug management controller or through an SMBus™

with an external I/O expander. Integrated debounced

attention switch and present-detect signals are included

to simplify system design.

● PCI Express Compliant

● Hot Swaps 12V, 3.3V, and 3.3V Auxiliary for a Single

PCI-E Slot

● Integrated Power MOSFET for Auxiliary Supply Rail

● Controls dI/dt and dV/dt

● Active Current Limiting Protects Against Overcurrent/

Short-Circuit Conditions

● Programmable Current-Limit Timeout

●

PWRGD Signal Output with Programmable Power-

On Reset (POR) (160ms Default)

The MAX5954 drives two external n-channel MOSFETs to

control the 12V and 3.3V main outputs. The 3.3V auxiliary

output is controlled through an internal 0.3Ω n-channel

MOSFET. An internal charge pump provides gate drive for

the 12V output while the gate drive of the 3.3V output is

driven by the 12V input supply. The 3.3V auxiliary output

is completely independent from the main outputs with its

own charge pump.

● Latched FAULT Signal Output after Overcurrent or

Overtemperature Fault

● Attention Switch Input/Output with 4.4ms Debounce

● Present-Detect Input

● Forced-On Input Facilitates Testing

● Thermal Shutdown

● Allows Control Through SMBus with an I/O Expander

At power-up, the MAX5954 keeps all of the external

MOSFETs off until the supplies rise above their respec-

tive undervoltage-lockout (UVLO) thresholds. The device

keeps the internal MOSFET off only until the auxiliary

input supply rises above its UVLO threshold. Upon a turn-

on command, the MAX5954 enhances the external and

internal MOSFETs slowly with a constant gate current

to limit the power-supply inrush current. The MAX5954

actively limits the current of all outputs at all times and

shuts down if an overcurrent condition persists for longer

than a programmable overcurrent timeout. Thermal-

protection circuitry also shuts down all outputs if the die

temperature exceeds +150°C. After an overcurrent or

overtemperature fault condition, the MAX5954L latches

off while the MAX5954A automatically restarts after a

restart time delay. The device is available in a 36-pin

(6mm × 6mm) thin QFN package and operates over the

-40°C to +85°C temperature range.

Applications

● Servers

● Desktop Mobile Server Platforms

● Workstations

● Embedded Devices

Pin Conﬁguration

TOP VIEW

21 20 19

27 26 25 24 23 22

TIM

N.C.

OUTPUT

INPUT

12VIN

GND

N.C.

3.3VAUXIN

3.3VAUXO

PWRGD

FAULT

3.3G

MAX5954

PGND

PORADJ

Ordering Information appears at end of data sheet.

Typical Application Circuit appears at end of data sheet.

SMBus is a trademark of Intel Corp.

PCI Express is a trademark of PCI-SIG Corp.

THIN QFN

19-3914; Rev 2; 7/19

12 3 4 5 6 7...22

中文翻译

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与MAX5954相关器件

型号	品牌	获取价格	描述	数据表
MAX5954AETX+	MAXIM	获取价格	Single PCI Express, Hot-Plug Controller
MAX5954AETX+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 3 Channel, BICMOS, 6 X 6 MM, 0.80 MM HEIGHT, LEAD FRE
MAX5954LETX+	MAXIM	获取价格	Single PCI Express, Hot-Plug Controller
MAX5954LETX+T	MAXIM	获取价格	暂无描述
MAX5955	MAXIM	获取价格	Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control
MAX5955	ADI	获取价格	低电压、双路、热插拔控制器，带有独立的开/关控制
MAX5955AEEE	ROCHESTER	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 0.150 INCH, 0.025 INCH PITCH, MO-137AB, QSOP-1
MAX5955AEEE	MAXIM	获取价格	Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control
MAX5955AEEE+	MAXIM	获取价格	Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control
MAX5955AEEE+T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC

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