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PDF MAX5910 Data sheet ( Hoja de datos )
| Número de pieza | MAX5910 | |
| Descripción | +65V Simple Swapper Hot-Swap Switches | |
| Fabricantes | Maxim Integrated | |
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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
VIN (+42V)
VIN
UVLO
MAX5910
MAX5917
VOUT
IFAULT
ON
OFF
ENABLE
PGOOD
GND
10kΩ +3.3V
10kΩ
L
O
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.
1 page  
+65V Simple Swapper Hot-Swap Switches
Typical Operating Characteristics (continued)
(VIN = +42V, GND = 0, UVLO = open circuit, VENABLE = 3.3V, RL = 1.8kΩ, TA = +25°C, unless otherwise noted).
MAX5910 TURN-OFF WAVEFORMS
(RL = 1.8kΩ, CL = 47µF)
MAX5910 toc07
A
0
B
0
C
0
A: ENABLE, 5V/div
B: VOUT, 20V/div
C: PGOOD, 5V/div
20ms/div
MAX5910 ZERO-CURRENT RESPONSE
MAX5910 toc08
A
0
B
0
C
0
A: IOUT, 100mA/div
B: IFAULT, 5V/div
C: VOUT, 20V/div
2ms/div
MAX5910 OVER-CURRENT RESPONSE
MAX5910 toc09
A
0
B
0
C
0
40ms/div
A: IOUT, 200mA/div
B: IFAULT, 5V/div
C: VOUT, 20V/div (SHORTED TO GND)
MAX5917B TURN-ON WAVEFORMS
(RL = 1.8kΩ, CL = 0)
MAX5910 toc10
A
0
B
0
C
0
A: ENABLE, 5V/div
B: VOUT, 20V/div
C: PGOOD, 5V/div
2ms/div
MAX5917B TURN-OFF WAVEFORMS
(RL = 1.8kΩ, CL = 0)
MAX5910 toc11
A
0
B
0
C
0
A: ENABLE, 5V/div
B: VOUT, 20V/div
C: PGOOD, 5V/div
2ms/div
MAX5917B TURN-ON WAVEFORMS
(RL = 1Ω, CL = 47µF)
MAX5910 toc12
A
0
B
0
C
0
A: ENABLE, 5V/div
B: VOUT, 20V/div
C: PGOOD, 5V/div
2ms/div
_______________________________________________________________________________________ 5
5 Page 
+65V Simple Swapper Hot-Swap Switches
Chip Information
TRANSISTOR COUNT: 1003
PROCESS: SG3ISO
Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX5910.PDF ] | |
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