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MAX5900, MAX5901
-100V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers
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Status
Active: In Production.
Description
The MAX5900/MAX5901 are SOT23/TDFN hot-swap controllers
that allow a circuit card to be safely hot-plugged
into a live backplane without causing a glitch on
the power-supply rail. These devices operate from -9V to
-100V and provide the simplest hot-swap solution by
eliminating all external components except an external
n-channel MOSFET.
The MAX5900/MAX5901 limit the inrush current to the
load and provide a circuit-breaker function for overcurrent
protection. During startup, the circuit-breaker function is
disabled and the MAX5900/MAX5901 limit the inrush current
by gradually turning on the external MOSFET. Once
the external MOSFET is fully enhanced, the circuit-breaker
function is enabled and the MAX5900/MAX5901 provide
overcurrent protection by monitoring the voltage
drop across the external MOSFET's on-resistance.
The MAX5900/MAX5901 include an undervoltage lockout
(UVLO) function, ON/active-low OFF control input, and a powergood
status output, active-low PGOOD (MAX5900) or PGOOD
(MAX5901). A built-in thermal shutdown feature is also
included to protect the external MOSFET in case of overheating.
The MAX5900/MAX5901 offer latched or autoretry fault
management and are available with 200mV, 300mV, or
400mV circuit-breaker thresholds. Both the MAX5900 and
MAX5901 are available in small SOT23 and TDFN packages,
and are specified for the extended -40°C to +85°C
temperature range. For specific ordering information see
the Selector Guide at the end of the data sheet.
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Data Sheet
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Key Features
- Wide -9V to -100V Operation
- Requires No External Sense Resistor
- Drives External N-Channel MOSFET
- Limits Inrush Current
- Circuit-Breaker Function
- Less than 1mA Quiescent Current
- ON/Active-Low OFF Input Permits Load Power-Supply Control and Sequencing
- Adjustable Undervoltage Lockout
- Power-Good Output with 100V Rating
- Latching or Automatic Retry Fault Management
- Thermal Shutdown Helps Protect the External MOSFET
- Space-Saving 6-Pin SOT23 and TDFN Packages
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Applications/Uses
- Base-Station Line Cards
- Network Hubs, Switches, Routers
- Servers
- Telecom Line Cards
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Key Specifications:
| Hot Swap Controllers |
| Part Number |
VIN
(V) |
VIN
(V) |
Circuit Breaker/ Current Limit |
Circuit Breaker/Current Limit Threshold
(mV) |
Fault Condition Control |
Channels |
Positive/Negative Rail |
Package/Pins |
Budgetary Price |
| min |
max |
See Notes |
| MAX5900 |
-9 |
-100 |
Circuit Breaker |
200 to 400 |
| Latched Off | | Periodic Retry |
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1 |
Negative |
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$1.45 @1k |
| MAX5901 |
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$1.45 @1k |
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See All Hot Swap Controllers (53)
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Pricing 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.
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-1988
Rev 5;
2007-02-22
This page last modified: 2007-06-26
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