MAX5900ABETT+T Maxim Integrated Products, MAX5900ABETT+T Datasheet - Page 5

• Manufacturer Part Number: MAX5900ABETT+T
• Description: IC HOT-SWAP CONTROLLER 6-TDFN-EP
• Manufacturer: Maxim Integrated Products
• Series: Simple Swapper™r
• Type: Hot-Swap Controllerr

Specifications of MAX5900ABETT+T

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: -9 V ~ -100 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-WDFN exposed pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX5900/MAX5901 are integrated hot-swap con-
troller ICs contained in 6-pin SOT23/TDFN packages.
They allow a board to be safely hot plugged into a live
backplane without causing a glitch on the power-sup-
ply rail. They are well suited for -48V telecom power
systems, allowing a cost-effective, simple, and com-
pact design. The MAX5900/MAX5901 operate from -9V
to -100V to cover the standard telecom voltage range,
and to serve more generalized applications. These
devices require only an external n-channel power MOS-
FET to provide hot-swap control. Figure 1 shows a
functional diagram of the MAX5900/MAX5901.
The MAX5900/MAX5901 control an external n-channel
power MOSFET placed in the negative power-supply
pathway. When power is first applied, the MAX5900/
MAX5901 keep the MOSFET turned off. The MAX5900/
MAX5901 hold the MOSFET off indefinitely if ON/OFF is
held low, if the supply voltage is below the undervolt-
age lockout level, or if the die temperature exceeds
+125°C. If none of these conditions exist for 300ms
(typ), the MAX5900/MAX5901 begin to gradually turn
on the MOSFET. During this turn-on phase, the
MAX5900/MAX5901 slowly enhance the MOSFET,
MAX5900
—
—
1
2
3
4
5
6
PIN
MAX5901
_______________________________________________________________________________________
—
—
1
2
3
4
5
6
Detailed Description
-100V, SOT23/TDFN, Simple Swapper
PGOOD
PGOOD
ON/OFF
DRAIN
NAME
GATE
GND
V
EP
EE
Negative Supply Voltage Input and External n-Channel MOSFET Source
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 (see the
Layout Guidelines section).
Gate Drive Output for External n-Channel MOSFET
Ground Connection.
Power-Good Output. PGOOD is an n-channel, open-drain, active-low output,
referenced to V
Power-Good Output. PGOOD is an n-channel, open-drain, active-high output,
referenced to V
ON/OFF Control Input. ON/OFF is referenced to V
or leave unconnected to enable the device. Drive ON/OFF below 1V to disable
the device. ON/OFF is also used to adjust the UVLO threshold. See the Under-
voltage Lockout section in the Applications Information. Internally clamped to
nominally 3V through a 1kΩ resistor (see Figure 1).
Exposed Pad (TDFN only). Connect to V
EE
EE
.
.
Figure 1. Functional Diagram
ON/OFF
GND
Hot-Swap Controllers
V
EE
*RELATIVE TOLERANCE ±1%, ABSOLUTE TOLERANCE ±20% TYPICAL.
( ) ARE FOR THE MAX5901 ONLY.
828kΩ*
34.5kΩ*
V
EE
FUNCTION
1kΩ*
EE
.
3V
GATE
CONTROL
MAX5900
MAX5901
EE
LOGIC
. Drive ON/OFF above 1.38V
DRAIN
Pin Description
466kΩ*
V
EE
N
PGOOD
(PGOOD)
5