MAX5954LETX+T

更新时间： 2024-10-14 13:10:43

品牌	Logo	应用领域
美信 - MAXIM		控制器 PC
页数	文件大小	规格书
22页	1026K
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MAX5954LETX+T 数据手册

19-3914; Rev 1; 1/06

Single PCI Express, Hot-Plug

Controller

General Description

Features

♦ PCI Express Compliant

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 sin-

gle 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.

♦ 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

The MAX5954 drives two external n-channel MOSFETs

to control the 12V and 3.3V main outputs. The 3.3V aux-

iliary 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.

♦ PWRGD Signal Output with Programmable

Power-On Reset (POR) (160ms Default)

♦ Latched FAULT Signal Output after Overcurrent

or Overtemperature Fault

♦ Attention Switch Input/Output with 4.4ms

Debounce

♦ Present-Detect Input

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 aux-

iliary input supply rises above its UVLO threshold. Upon

a turn-on command, the MAX5954 enhances the exter-

nal 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 per-

sists for longer than a programmable overcurrent time-

out. 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 automatical-

ly restarts after a restart time delay. The device is avail-

able in a 36-pin (6mm × 6mm) thin QFN package and

operates over the -40°C to +85°C temperature range.

♦ Forced-On Input Facilitates Testing

♦ Thermal Shutdown

♦ Allows Control through SMBus with an I/O

Expander

Ordering Information

PIN-

PACKAGE

PKG

CODE

PART

TEMP RANGE

36 Thin QFN

MAX5954AETX+ -40°C to +85°C

MAX5954LETX+ -40°C to +85°C

+Denotes lead free package.

T3666-3

Pin Configuration

TOP VIEW

21 20 19

27 26 25 24 23 22

Applications

TIM

N.C.

Servers

N.C.

Desktop Mobile Server Platforms

Workstations

OUTPUT

INPUT

N.C.

3.3VAUXIN

MAX5954

12VIN 33

13 3.3VAUXO

Embedded Devices

GND

PGND

PWRGD

FAULT

3.3G

PORADJ

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

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...22

中文翻译

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MAX5954LETX+T 替代型号

型号	品牌	替代类型	描述	数据表
MAX5954LETX+	MAXIM	类似代替	Single PCI Express, Hot-Plug Controller

与MAX5954LETX+T相关器件

型号	品牌	获取价格	描述	数据表
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
MAX5955AUEE	MAXIM	获取价格	Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control
MAX5955AUEE+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5955BEEE	MAXIM	获取价格	Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control
MAX5955BEEE+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC

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