LTC4367 datasheet(1/6 Pages) LINER

Part #	LTC4367

Description	100V Overvoltage, Undervoltage and Reverse Supply Protection Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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dc2417af

DEMO MANUAL DC2417A

DESCRIPTION

LTC4367

100V Overvoltage, Undervoltage and

Reverse Supply Protection Controller

Demonstration circuit 2417A is intended to demonstrate

the performance of the LTC4367 100V overvoltage (OV),

undervoltage(UV),andreversesupplyprotectioncontroller.

This controller protects circuits from input voltages

that may be too high, too low or negative. It operates

by controlling the gates of two back-to-back connected

N-channel MOSFETs to keep the output in a safe range.

The UV and OV setpoints are configured by the resistive

divider on the UV and OV inputs. Asserting the SHDN pin

disables the MOSFETs and places the LTC4367 in a low

current shutdown state. The FAULT pin asserts when the

controller is in the shutdown mode or when the input

voltage is outside of the UV/OV window. The LTC4367 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

can withstand DC voltages between –40V and 100V and

has an operating range of 2.5V to 60V.

The DC2417A includes the LTC4367, two back-to-back

connected power MOSFETs, three jumpers and three

LEDs to indicate the input and output voltages and the

FAULT pin signal.

The DC2417A is assembled in two options: DC2417A-A,

which is populated with LTC4367, and DC2417A-B, which

uses LTC4367-1.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2417A

Specifications are at TA = 25°C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Voltage Range

Operating Range

Protection Range

2.5

–40

60

100

V

VIN(UVLO)

Input Supply Undervoltage Lockout

VIN Rising

1.8

2.2

2.4

V

IVIN

Input Supply Current; On

Off

SHDN = 2.5V

SHDN = 0V, VIN = VOUT

30

5

90

20

µA

IVIN(R)

Reverse Input Supply Current

VIN = –40V, VOUT = 0V

–1.5

–2

mA

∆VGATE

Gate Drive (GATE – VOUT)

VIN = VOUT = 5.0V, IGATE = 0μA, –1μA

VIN = VOUT = 12V to 34V, IGATE = –1µA

7.2

10

8.7

11

10.8

12.2

V

IGATE(UP)

Gate Pull-Up Current

GATE = 15V, VIN = VOUT = 12V

–20

–35

–50

µA

IGATE(FAST)

Gate Fast Pull-Down Current

GATE = 20V, VIN = VOUT = 12V

30

60

90

mA

IGATE(SLOW)

Gate Slow Pull-Down Current

GATE = 20V, VIN = VOUT = 12V

50

90

160

µA

VUV

UV Input Threshold Voltage

UV Falling

492.5

500

507.5

mV

VOV

OV Input Threshold Voltage

OV Rising

492.5

500

507.5

mV

tGATE(FAST)

Gate Fast Turn-Off Delay

CGATE = 2.2nF, UV or OV Fault

2

4

µs

tFAULT

OV, UV Fault Propagation Delay

Overdrive = 50mV, VIN = VOUT = 12V

1

2

µs

VSHDN

SHDN Input Threshold

SHDN Falling

0,4

0.75

1.2

V

VUV_BOARD

Board UV Range

5.75

5.97

6.17

V

VOV_BOARD

Board OV Range

14.44

14.95

15.47

V

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