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