MAX5933A, MAX5933B, MAX5933C, MAX5933D, MAX5933E, MAX5933F, MAX5947A, MAX5947B, MAX5947C Positive High-Voltage, Hot-Swap Controllers

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The MAX5933A-MAX5933F/MAX5947A/B/C fully integrated hot-swap controllers for +9V to +80V positive supply rails (MAX5947A/B/C), allow for the safe insertion and removal of circuit cards into live backplanes without causing glitches on the backplane power-supply rail. The MAX5947B is pin- and function-compatible with the LT1641-2. The other devices offer added features such as a choice of active-high or active-low power-good outputs (PWRGD/PWRGD-bar), latched/autoretry fault management, and autoretry duty-cycle options of 3.75% or 0.94% (see the Selector Guide).

The MAX5933A-MAX5933F are available with a default undervoltage lockout threshold of +31V and operate over a supply voltage range of +33V to +80V. The MAX5947A/B/C are available with a default undervoltage of +8.3V. All devices feature a programmable analog foldback current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET is either latched off (MAX5933A/MAX5933C/MAX5947A) or is set to automatically restart after a timeout delay (MAX5933B/MAX5933D/MAX5933E/MAX5933F/MAX5947B/MAX5947C).

The MAX5933_ and MAX5947_ operate in the extended temperature range of -40°C to +85°C. These devices are available in an 8-pin SO package.

Key Features

Applications/Uses

Pin- and Function-Compatible with the LT1641-2 (MAX5947B)
Provides Safe Hot Swap for +9V to +80V Power-Supply Range (MAX5947A/B/C)
Safe Board Insertion and Removal from Live Backplanes
Latched/Autoretry Management
Active-Low or Active-High Power-Good Output
Programmable Foldback Current Limiting
High-Side Drive for an External N-Channel MOSFET
Built-In Thermal Shutdown
Undervoltage Lockout (UVLO)
Overvoltage Protection
User-Programmable Supply Voltage Power-Up Rate

	24V/48V Industrial/Alarm Systems
	Electronic Circuit Breakers
	Hot Board Insertion
	Industrial High-Side Switch/Circuit Breakers
	Network Routers and Switches

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

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX5933

Yes

Positive

Positive, High-Voltage

Latched Off
Periodic retry

•	70mA Gate Pulldown Current During Any Fault Condition

•	Auto-retry fault management

•	In-Rush Current and Short Circuit Protection

•	On/Off Control

•	Output Undervoltage Monitor

•	Power-Good output (active-high)

•	Power-Good output (active-low)

•	Powers up into shorted load

•	Programmable Start-Up, Overcurrent, and Load-Disconnect Timeouts

Yes

SOIC/8

-40 to +85

$1.49 @ 1k

MAX5947

$1.49 @ 1k

See All Hot Swap Controllers (44)

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.