MAX5910 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – +65V Simple Swapper Hot-Swap Switches

19-1706; Rev 0; 7/01
+65V Simple Swapper Hot-Swap Switches
General Description
The MAX5910/MAX5917 are fully integrated hot-swap
switches for positive supply rails. These devices allow
the safe insertion and removal of circuit cards into live
backplanes or ports without causing glitches on the
backplane power-supply rail. They also monitor various
circuit parameters and disconnect the load if a fault
condition occurs, alerting the host with a logic-level
IFAULT output. The MAX5910/MAX5917 operate over a
+10V to +65V input voltage range. They are designed
to permit hot plugging of an internet appliance such as
an IP phone but are not limited to that application.
During startup, an internal power FET regulates the cur-
rent between the backplane power source and the load
to 280mA for the MAX5910, 567mA for the MAX5917A,
and 420mA for the MAX5917B. After startup, the FET is
fully enhanced to reduce its on-resistance. To ensure
robust operation, the MAX5910/MAX5917 contain built-
in safety features that prevent damage to the internal
FET. They include an enable input, which responds to
positive logic signals (+3.3V or +5V), allowing the host
system to disconnect the load.
The MAX5910/MAX5917 Simple Swapper™ hot-swap ICs
monitor four parameters for fault conditions: undervoltage
lockout (UVLO), power-not-good, zero-current detection,
and thermal shutdown. These devices are available in the
extended temperature range, -40°C to +85°C. The
MAX5910 comes in an 8-pin SO package and the
MAX5917A/B is available in a 16-pin SO package.
Applications
IP Phones
Power-Over-LAN
Power-Over-MDI
Remote Power Distribution
Network Routers
Network Switches
Internet Appliances
Features
o Provides Safe Hot Swap for +10V to +65V Power
Supplies
o IEEE 802.3af Compliant (MAX5917A)
o Startup into 500µF Load (MAX5917A)
o 280mA Current Limit for MAX5910
o 567mA Current Limit for MAX5917A
o 420mA Current Limit for MAX5917B
o Zero-Current Load Detection
o Integrated 2.2Ω Power FET
o Status Output Reports Fault Conditions
o Internal Switch-Protection Circuitry
o Built-In Thermal Shutdown
Ordering Information
PART
MAX5910ESA
MAX5917AESE*
MAX5917BESE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
16 SO
16 SO
*Future product—contact factory for availability.
Typical Operating Circuit
V_IN (+42V)
V_IN
UVLO
MAX5910
MAX5917
V_OUT
IFAULT
ON
OFF
ENABLE
PGOOD
GND
10kΩ +3.3V
L
O
10kΩ
A
D
Pin Configurations appear at end of data sheet.
Simple Swapper is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.