MAX5901 MAXIM [Maxim Integrated Products], MAX5901 Datasheet

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MAX5901

Manufacturer Part Number
MAX5901
Description
-100V SOT23 Simple Swapper Hot-Swap Controllers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX5900/MAX5901 are SOT23 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 cur-
rent by gradually turning on the external MOSFET. Once
the external MOSFET is fully enhanced, the circuit break-
er function is enabled and the MAX5900/MAX5901 pro-
vide overcurrent protection by monitoring the voltage
drop across the external MOSFET’s on-resistance.
The MAX5900/MAX5901 include an undervoltage lock-
out (UVLO) function, ON/OFF control input, and a power-
good status output, PGOOD (MAX5900) or PGOOD
(MAX5901). A built-in thermal shutdown feature is also
included to protect the external MOSFET in case of over-
heating.
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 packages, and
are specified for the extended -40°C to +85°C tempera-
ture range. For specific ordering information see the
Selector Guide at the end of the data sheet.
o Requires No External Sense Resistor
19-1988; Rev 3; 8/03
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.
_________________________Applications
BACKPLANE CIRCUIT CARD
GND
-48V
Telecom Line Cards
Network Routers
Base-Station Line
Cards
FUSE
Typical Operating Circuits
HOT-SWAP CONTROLLER
GND
ON/OFF
V
EE
________________________________________________________________ Maxim Integrated Products
MAX5900
-100V SOT23 Simple Swapper Hot-Swap
PGOOD
DRAIN
GATE
General Description
IRF540NS
Network Switches
Servers
POWER SUPPLY
50W ISOLATED
V
ON/OFF
V
1
1
+
-
JWO50A1
LUCENT
o Wide -9V to -100V Operation
o Requires No External Sense Resistor
o Drives External N-Channel MOSFET
o Limits Inrush Current
o Circuit Breaker Function
o Less than 1mA Quiescent Current
o ON/OFF Input Permits Load Power-Supply
o Adjustable Undervoltage Lockout
o Power-Good Output with 100V Rating
o Latching or Automatic Retry Fault Management
o Thermal Shutdown Helps Protect the External
o Space-Saving 6-Pin SOT23 Package
*For specific part numbers, see Selector Guide at end of data
sheet.
Typical Operating Circuits continued at end of data sheet.
Simple Swapper is a trademark of Maxim Integrated Products, Inc.
MAX5900_ _EUT-T*
MAX5901_ _EUT-T*
TOP VIEW
Control and Sequencing
MOSFET
PART
DRAIN
( ) ARE FOR MAX5901 ONLY.
GATE
V
EE
1
2
3
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
SOT23-6
MAX5900
MAX5901
Pin Configuration
Controllers
6
5
4
ON/OFF
PGOOD (PGOOD)
GND
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
Features
1

Related parts for MAX5901

MAX5901 Summary of contents

Page 1

... 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 packages, and are specified for the extended -40°C to +85°C tempera- ture range. For specific ordering information see the Selector Guide at the end of the data sheet ...

Page 2

SOT23 Simple Swapper Hot-Swap Controllers ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND, unless otherwise noted) DRAIN, PGOOD, PGOOD ............................-120V to +0.3V V EE, ON/OFF to V .........................................................-0.3V to +4V EE GATE to V ......................................................... -0.3V to +12V ...

Page 3

... PGOOD 100V (MAX5900); PGOOD 100V (MAX5901) PGOOD EE Junction temperature = +25°C. Specifications over -40°C to +85°C are guaranteed by characterization. A begins rising. Valid on conditions are: the device is not in undervolt- GS falls. Pulses on ON/OFF less than t GS Typical Operating Characteristics SUPPLY CURRENT vs. TEMPERATURE ...

Page 4

SOT23 Simple Swapper Hot-Swap Controllers (V = -48V, GND = 0, and T = +25°C, unless otherwise noted. See Figure 6 for test circuits GATE DRIVE VOLTAGE vs. INPUT VOLTAGE 11.0 10.5 10.0 9.5 9.0 8.5 8.0 ...

Page 5

... Connection Drain Sense Input for External N-Channel MOSFET. Connect DRAIN as close as possible to the MOSFET’s drain and use wide circuit traces to assure good thermal coupling between the MAX5900/MAX5901 and the MOSFET (aee Layout Guidelines). Gate Drive Output for External N-Channel MOSFET Ground Connection ...

Page 6

... A thermal shutdown feature protects the external MOS- FET by turning it off if the die temperature of the MAX5900/MAX5901 exceeds +125°C. The MAX5900/ MAX5901 must be in good thermal contact with the external MOSFET. See Layout Guidelines in the Applications Information section. A circuit breaker function monitors the voltage across ...

Page 7

... HOT-SWAP CONTROLLER MAX5900 A thermal shutdown feature helps protect the external MAX5901 GND MOSFET. If the die temperature of the MAX5900/ MAX5901 exceeds +125°C, the MOSFET is turned off. ON/OFF For accurate performance, the MAX5900/MAX5901 V EE must be in close thermal contact with the external MOSFET (see Layout Guidelines section) ...

Page 8

... Determining a circuit’s inrush current is necessary to | < UVLO help choose the proper MOSFET. The MAX5900/ MAX5901 regulate the inrush current by means of con- trolling the load voltage slew rate, but inrush current is also a function of load capacitance. Determine inrush current using: , and can EE ...

Page 9

... TURN-ON WAVEFORMS Figure 6. Test Circuits _______________________________________________________________________________________ Good thermal contact between the MAX5900/ MAX5901 and the external MOSFET is essential for the thermal shutdown feature to operate effectively. Place the MAX5900/MAX5901 as close as possible to the drain of the external MOSFET, and use wide circuit board traces for good heat transfer. See Figure 5 for an example board layout ...

Page 10

... MAX5900LCEUT* Latched MAX5901NNEUT* None MAX5901AAEUT* Auto Retry MAX5901ABEUT* Auto Retry MAX5901ACEUT* Auto Retry MAX5901LAEUT* Latched MAX5901LBEUT* Latched MAX5901LCEUT* Latched *Requires special solder temperature profile described in the Absolute Maximum Ratings section. BACKPLANE CIRCUIT CARD GND -48V *MAX5003 IS A 110V PWM CONTROLLER. 10 ______________________________________________________________________________________ ...

Page 11

SOT23 Simple Swapper Hot-Swap (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry ...

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