1

®

FN9086.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Intellitrip™ is a trademark of Intersil Americas Inc.

Copyright © Intersil Americas Inc. 2002, 2004, All Rights Reserved

ISL6142, ISL6152

Negative Voltage Hot Plug Controller

The ISL6142/52 are 14 pin, negative voltage hot plug controllers

that allow a board to be safely inserted and removed from a live

backplane. Inrush current is limited to a programmable value by

controlling the gate voltage of an external N-channel pass

transistor. The pass transistor is turned off if the input voltage is

less than the Under-Voltage threshold, or greater than the Over-

Voltage threshold. The PWRGD/PWRGD outputs can be used to

directly enable a power module. When the Gate and DRAIN

voltages are both considered good the output is latched in the

active state.

current limit features protect the system against short circuits.

When the Over-Current threshold is exceeded, the output current

is limited for a time-out period before the circuit breaker trips and

shuts down the FET. The time-out period is programmable with an

external capacitor connected to the CT pin. If the fault disappears

before the programmed time-out, normal operation resumes. In

Fault shutdown, with a threshold set at 4 times the Over-Current

trip point. When activated, the GATE is immediately turned off and

then slowly turned back on for a single retry.

monitor feature that presents a scaled version of the load current

Related Literature

• ISL6142/52EVAL1 Board Set, Document AN1000

• ISL6140/50EVAL1 Board Set, Document AN9967

• ISL6140/41EVAL1 Board Set, Document AN1020

• ISL6141/51 Hot Plug Controller, Document FN9079

• ISL6141/51 Hot Plug Controller, Document FN9039

• ISL6116 Hot Plug Controller, Document FN4778

NOTE: See www.intersil.com/hotplug for more information.

Pinout

ISL6142 OR ISL6152 (14 LEAD SOIC)

Typical Application

Features

• Operates from -20V to -80V (-100V Absolute Max Rating)

• Programmable Inrush Current

• Programmable Time-Out

• Programmable Current Limit

• Programmable Over-Voltage Protection

• Programmable Under-Voltage Protection

- 135 mV of hysteresis ~4.7V of hysteresis at the power supply

severe and moderate faults

- Fast shutdown for short circuit faults with a single retry (fault

current > 4X current limit value).

•FAULT pin reports the occurrence of an Over-Current Time-Out

• Disable input controls GATE shutdown and resets Over-Current

fault latch

• Load Current Monitor Function

conversion

• Power Good Control Output

- Output latched “good” when DRAIN and GATE voltage

thresholds are met.

-(PWRGD active low: ISL6142 (L version)

- PWRGD active high: ISL6152 (H version)

• Pb-free available

Applications

• VoIP (Voice over Internet Protocol) Servers

• Telecom systems at -48V

• Negative Power Supply Control

• +24V Wireless Base Station Power

FAULT

OV

10

13

12

4

3

2

CT

PWRGD/PWRGD 1

14

GATE

9 IS+

8 SENSE

UV

5

IS-

6

11 DRAIN

ISL6142/52

Top View

DIS

ISL6142/ISL6152

UV

OV

SENSE GATE

DRAIN

PWRGD

R4

R5

R6

R1

R2

R3 C2

C1

Q1

CL

GND

GND

-48V IN

-48V OUT

RL

LOAD

CT

IS-

IS+

R8

R7

R9

C3

FAULT

DIS

Logic

Supply

R10

R6 = 10K

Ω (1%)

R7 = R8 = 400

Ω (1%)

R9 = 4.99K

Ω (1%)

R10 = 5.1K

Ω (10%)

C1 = 150nF (25V)

C2 = 3.3nF (100V)

C3 = 1500pF (25V)

Q1 = IRF530

CL = 100uF (100V)

R1 = 0.02

Ω (1%)

R2 = 10

Ω (5%)

R3 = 18K

Ω (5%)

R4 = 549K

Ω (1%)

R5 = 6.49K

Ω (1%)

RL = Equivalent load

PWRGD

Data Sheet

July 2004