Datasheet
MAX5976A/MAX5976B
2.7V to 18V, 7A, Hot-Swap Solution
5
Pin Description
Pin Configuration
PIN NAME FUNCTION
1 GND Ground
2–5 IN
Supply Voltage Input. IN is connected to the drain of the internal 24mI MOSFET. Bypass IN with
1FF capacitor to ground. Add a transient voltage suppressor diode from IN to GND for output
short-circuit protection.
6 FAULT
Fault Status Output. FAULT is an open-drain, active-low output. FAULT asserts low when an over-
current or overtemperature condition triggers a shutdown.
7 PG
Power-Good Output. PG is an open-drain, active-high output. PG pulls low until the internal power
MOSFET is fully enhanced.
8–11 OUT Load Connection Point. Source of the internal power MOSFET.
12 PRESDET
Active-Low Present-Detect Logic Input. Pulling PRESDET to GND enables the output if ON2 is low
and ON1 is high.
13 ON2
Active-Low Enable Logic Input. Pulling ON2 to GND enables the output if PRESDET is low and
ON1 is high.
14 CB Current-Limit Threshold Set. Connect a resistor from CB to GND to set the circuit-breaker threshold.
15 REG
Internal Regulator Output. Bypass to ground with a 1FF capacitor. Do not power external circuitry
using the REG output.
16 ON1
Active-High Enable Comparator Input. Pulling ON1 high enables the output if PRESDET and
ON2 are held low. ON1 also sets the undervoltage threshold. See the Setting the Undervoltage
Threshold section.
— EP
Exposed Pad. EP is internally grounded. Connect externally to ground plane for effective heat dis-
sipation. Do not use as the only ground connection.
15
16
14
13
6
5
7
IN
IN
GND
EP*
*CONNECT EP TO GND.
OUT
OUT
PRESDET
1 2
CB
4
12 11 9
REG
ON1
OUT
PG
FAULT
IN
MA5976A
MA5976B
IN OUT
3
10
ON2
TQFN
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