MAX5920 -48V Hot-Swap Controller with External RSENSE

Description

The MAX5920A/MAX5920B are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane. The MAX5920A/MAX5920B operate from -20V to -80V and are well-suited for -48V power systems. These devices are pin and function compatible with the LT4250 and pin compatible with the LT1640.

The MAX5920A/MAX5920B provide a controlled turn-on to circuit cards preventing glitches on the power-supply rail and damage to board connectors and components. The MAX5920A/MAX5920B provide undervoltage, overvoltage, and overcurrent protection. These devices ensure the input voltage is stable and within tolerance before applying power to the load.

Both the MAX5920A and MAX5920B protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition. The MAX5920A/MAX5920B also provide protection against input voltage steps. During an input voltage step, the MAX5920A/MAX5920B limit the current drawn by the load to a safe level without turning off power to the load.

Both devices feature an open-drain power-good status output (active-low PWRGD for the MAX5920A or PWRGD for the MAX5920B) that can be used to enable downstream converters. A built-in thermal-shutdown feature is also included to protect the external MOSFET in case of overheating.

The MAX5920A/MAX5920B are available in an 8-pin SO package. Both devices are specified for the extended -40°C to +85°C temperature range.

Key Features

Applications/Uses

Allows Safe Board Insertion and Removal from a Live -48V Backplane
Pin- and Function-Compatible with LT4250L (MAX5920A)
Pin-Compatible with LT1640L (MAX5920A)
Pin- and Function-Compatible with LT4250H (MAX5920B)
Pin-Compatible with LT1640H (MAX5920B)
Circuit-Breaker Immunity to Input Voltage Steps and Current Spikes
Withstands -100V Input Transients with No External Components
Programmable Inrush and Short-Circuit Current Limits
Operates from -20V to -80V
Programmable Overvoltage Protection
Programmable Undervoltage Lockout
Powers Up into a Shorted Load
Power-Good Control Output
Thermal Shutdown Protects External MOSFET

	Base-Station Line Cards
	Central-Office Line Cards
	Network Routers and Switches
	Server Line Cards
	Telecom Line Cards

Key Specifications: Hot Swap Controllers

Part Number

Min. V_IN (V)

Max. V_IN (V)

Low Voltage

High Voltage

Voltage Polarity

Type

Fault Condition Control

Number of Channels

Features

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX5920

-20

-80

Yes

Negative

Negative, High-Voltage

Latched Off

•	Immune to Input-Voltage Steps and Current Spikes

•	In-Rush Current and Short Circuit Protection

•	On/Off Control

•	Power-Good output (active-high)

•	Power-Good output (active-low)

•	Powers up into shorted load

•	Programmable In-Rush and Short-Circuit Protection

•	Programmable OV protection

Yes

SOIC/8

-40 to +85

$1.55 @ 1k

See All Hot Swap Controllers (45)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-18 of 18

MAX5920

Free
Sample

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Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX5920AESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920CESA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+5*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5920BESA+T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+5*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5920BESA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+5*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5920AESA+T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+5*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5920AESA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+5*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5920FESA-T

-40°C to +85°C

See data sheet

MAX5920FESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

See data sheet
Materials Analysis

MAX5920EESA-T

-40°C to +85°C

See data sheet

MAX5920EESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920DESA-T

-40°C to +85°C

See data sheet

MAX5920DESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

See data sheet
Materials Analysis

MAX5920CESA-T

-40°C to +85°C

See data sheet

MAX5920CESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920BESA-T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920BESA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920AESA-T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-5*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5920CESA+T

-40°C to +85°C

See data sheet

Related Products

MAX5900, MAX5901 -100V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers