MAX5976AETE+ Maxim Integrated Products, MAX5976AETE+ Datasheet - Page 8

• Manufacturer Part Number: MAX5976AETE+
• Description: Hot Swap & Power Distribution 2.7-18V Hot-Swap Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX5976AETE+

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.7V to 18V, 7A, Hot-Swap Solution
The devices feature an open-drain, power-good output
that asserts after 16ms (typ), indicating that OUT has
reached (0.9 x V
The devices include a linear regulator that outputs
2.6V at REG. REG provides power to the internal circuit
blocks of the ICs and must not be loaded externally. REG
requires a 1FF capacitor to ground for proper operation.
FAULT is an open-drain output that pulls low when a cur-
rent limit or an overtemperature fault shutdown occurs.
FAULT remains low until the next startup cycle. FAULT is
capable of sinking up to 5mA when asserted.
The devices enter a thermal shutdown mode in the event
of overheating caused by excessive power dissipation
or high ambient temperature. When the junction tem-
perature exceeds T
protection circuitry turns off the internal power MOSFET.
The devices recover from thermal shutdown mode once
the junction temperature drops by 20NC (typ).
The devices feature an independent ON/OFF control
(ON1) for the internal MOSFET. The devices operate
with a 2.7V to 18V input voltage range and has a default
2.5V (typ) undervoltage lockout threshold. The internal
MOSFET remains off as long as V
< V
grammable using a resistive divider between ON1 and
GND (Figure 1). When V
exceeds the 1.21V (typ) threshold, the gate of the inter-
nal MOSFET enhances to 5V, with respect to V
8
ON1_TH
Setting the Undervoltage Threshold
. The undervoltage lockout threshold is pro-
Applications Information
IN
) voltage.
J
Fault Status Output (FAULT)
= +150NC (typ), the internal thermal
IN
is greater than 2.7V and V
Thermal Protection
Power-Good Delay
IN
< 2.5V and/or V
IN
and the
REG
ON1
ON1
devices' internal switch goes into normal operation.
the following equation to calculate the resistors values for
the desired undervoltage threshold:
where V
and V
from V
V
V
internal MOSFET turns off, disconnecting the load from
the input.
An external resistor from CB to ground sets the current
limit for the devices. Use the following formula to set the
current limit:
PROCESS: BiCMOS
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
ON1
ON1
16 TQFN-EP
PACKAGE
TYPE
ON1
falls 100mV (V
must remain above its 1.21V (typ) threshold. If
IN
IN
to ON1. During normal operating conditions,
is 1.21V. R1 and R2 create a resistive divider
is the desired turn-on voltage for the output
I
LIMIT
PACKAGE
R1
T1655+3
CODE
(A)
=
ON1_HYS




=
V
Package Information
ON1_TH



Setting the Current Limit
0.175A
V
1000
IN
Chip Information
) below the threshold, the
Ω
OUTLINE
21-0140
- 1



NO.
×




×
R
R2
CB
( )
Ω
PATTERN NO.
90-0073
LAND
Use