MAX5917BESE+ Maxim Integrated Products, MAX5917BESE+ Datasheet - Page 8

• Manufacturer Part Number: MAX5917BESE+
• Description: IC HOT-SWAP SWITCH 65V 16-SOIC
• Manufacturer: Maxim Integrated Products
• Series: Simple Swapper™r
• Type: Hot-Swap Switchr

Specifications of MAX5917BESE+

• Applications: IP Phones, Power over LAN, Network Routers and Switches
• Internal Switch(s): Yes
• Current Limit: 420mA
• Voltage - Supply: 10 V ~ 65 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

+65V Simple Swapper Hot-Swap Switches
The MAX5910/MAX5917 are fully integrated hot-swap
switches for positive power-supply rails. The devices
allow safe insertion and removal of circuit cards into
live backplanes or ports without causing glitches on the
backplane power-supply rail. During startup these
devices act as current regulators using their on-board
FET to limit the amount of current drawn by the load to
280mA for MAX5910, 567mA for MAX5917A, and
420mA for MAX5917B. If the required load current
exceeds that current limit, the internal switch behaves
like a constant current source.
The MAX5910/MAX5917 monitor the input voltage, the
output voltage, the output current, and the die tempera-
ture. They assert IFAULT and PGOOD accordingly if
they detect an error condition.
A zero-current load detection feature activates if the
load current drops below IF
MAX5910/MAX5917 also include an ENABLE input
allowing the host system to turn the FET on or off.
8
MAX5910
_______________________________________________________________________________________
1
2
3
4
5
6
7
8
PIN
1, 6, 8, 9, 15, 16
MAX5917A/B
4, 5, 12, 13
10
11
14
2
3
7
Detailed Description
TH
for over 12ms. The
ENABLE
PGOOD
IFAULT
NAME
UVLO
V
GND
N.C.
V
OUT
IN
Undervoltage Lockout Input. Leave UVLO open circuit for the default
setting of 26.5V. Alternatively, UVLO can be connected to a resistive-
divider to set a desired lockout voltage. See the Changing the
Undervoltage Lockout Setting section.
Voltage Input Terminal. Bypass V
improve noise immunity.
No Connection. Not internally connected.
3.3V Logic Input (TTL compatible), Active-High. Turns the internal FET
on or off. Drive ENABLE high to enable V
disable V
Open-Drain Logic Output, Active-High. PGOOD signals that the output
is within specification. When the output is less than 70% of the input, the
PGOOD signal is pulled low. Connect a 10k pullup resistor (R) to 3.3V.
Open-Drain Logic Output, Active-Low. IFAULT is asserted when the
output current falls below the IF
is off. Connect a 10k
Ground
Voltage Output Terminal
OUT
When power is first applied with ENABLE high, or when
ENABLE is asserted, the MAX5910/MAX5917A/
MAX5917B limit the current to the load to 280mA/
567mA/420mA. PGOOD is asserted high 12ms after the
output voltage exceeds the power-good threshold.
PGOOD is pulled low if V
A zero-current load detection feature activates if the
load current drops below IF
MAX5910/MAX5917 flag the zero-current condition but
do not disconnect the load. IFAULT is deasserted
whenever the load current exceeds the IF
zero-current detection threshold.
If V
which the UVLO fault occurs, the internal FET is turned
off and IFAULT and PGOOD are pulled low. The default
UVLO voltage is 26.5V, but it can be adjusted using an
external resistive-divider (see the Changing the
Undervoltage Lockout Setting section).
.
IN
UVLO, where UVLO is the desired voltage at
pullup resistor (R) to 3.3V.
FUNCTION
TH
Undervoltage Lockout Fault
IN
nominal threshold or when the switch
to GND with a 0.1µF capacitor to
Zero-Current Load Fault
OUT
OUT
Normal Operation
TH
is less than 70% V
. Drive ENABLE low to
for more than 12ms. The
Pin Description
TH
Startup
+ IF
IN
.
HYS