MAX16126 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX16126

Load-Dump/Reverse-Voltage Protection Circuits

Maxim Integrated 

MAX16126/MAX16127

Load-Dump/Reverse-Voltage Protection Circuits

Pin Description

PIN

NAME

FUNCTION

1

SHDN

Shutdown Input. Drive SHDN low to force GATE and FLAG low and turn off the external n-channel

MOSFETs. Connect a 100kI resistor from SHDN to IN for normal operation.

2

TERM

Voltage-Divider Termination Output. TERM is internally connected to IN. TERM is high impedance when

SHDN is low, forcing the current to zero in the resistive-divider connected to TERM.

3

N.C. No Connection. Not internally connected.

4

UVSET

Undervoltage Threshold Adjustment Input. Connect UVSET to the external resistive voltage-divider

network to adjust the desired input undervoltage threshold. Connect the resistive divider to TERM.

Overvoltage Threshold Adjustment Input. Connect OVSET to an external resistive voltage-divider

5

OVSET

network to adjust the desired overvoltage disable or overvoltage limit threshold. Connect the

resistive divider to TERM for overvoltage switch-mode applications or to OUT for overvoltage limiting

applications.

6

GND Ground

7

I.C. Internally Connected. Connect to GND.

FLAG Output. During startup, FLAG is low as long as VOUT is lower than 90% of VIN and after that

8

FLAG it is high impedance. It asserts low during shutdown mode, an overvoltage, thermal shutdown, or

undervoltage fault or when VOUT falls below 90% of VIN.

9

OUT

Output Voltage-Sense Input. Connect OUT to the load with a 100I series resistor. Bypass with a

minimum 10FF capacitor to GND.

Source Input. Connect SRC to the common source connection of the external MOSFETs. When the

10

SRC MOSFETs are turned off, this connection is clamped to GND. An external zener diode between SRC

and GATE protects the gates of the external MOSFETs.

Gate-Driver Output. Connect GATE to the gates of the external n-channel MOSFETs. GATE is the

11

GATE charge-pump output during normal operation. GATE is quickly pulled low during a fault condition or

when SHDN is pulled low.

12

IN

Positive Supply Input Voltage. Connect IN to the positive side of the input voltage. Bypass IN with a

0.1FF ceramic capacitor to GND.

—

EP

Exposed Pad. Can be connected to GND or left unconnected.

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