ISL6121LIB Intersil, ISL6121LIB Datasheet

ISL6121LIB

Manufacturer Part Number

ISL6121LIB

Description

IC CTRLR POWER SUPPLY SGL 8-SOIC

Manufacturer

Intersil

Datasheet

1.ISL6121HIBZA.pdf (11 pages)

Specifications of ISL6121LIB

Applications

Single Supply/Current Limiting Controller

Voltage - Supply

2.5 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current - Supply

Voltage - Input

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Single Supply Integrated Current Limiting

Controller

The ISL6121 is a single supply Overcurrent (OC) fault

protection IC for 2.5V to 5V applications where 2A current

limiting is desired. This device features internal current

monitoring and limiting along with a 50mΩ integrated power

switch and a current limited time out to latch-off feature for

system protection. The time to latch-off is independent of

device temperature, and magnitude of OC.

Each ISL6121 incorporates in a 8 lead SOIC package a

50mΩ N-channel MOSFET power switch for power control.

The switch is driven by a constant current source giving a

controlled ramp up of the output voltage. This provides a soft

start turn-on eliminating bus voltage drooping caused by in-

rush current while charging heavy load capacitances.

(Enable high (ISL6121H) and enable low (ISL6121L) options

are) available with a fault reporting output compatible with 3V

and 5V logic level signals allowing for external control and

monitoring.

The Under Voltage (UVLO) lockout feature prevents turn-on

of the output unless the correct ENABLE signal and VIN >

2.5V are both present. During initial turn-on the ISL6121

design prevents a fault from being presented by blanking the

fault signal, unlike other vendor devices needing additional

external circuitry to accomplish this. Rising and falling

output is a current-limited voltage ramp so that both the

inrush current and voltage slew rate are limited,

independent of load. This reduces supply droop due to

surge and eliminates the need for external EMI filters.

During operation once an OC condition is detected the

output is current limited to 2A to allow for a transient

condition to pass. If still in current limit after the current limit

period has elapsed the output is latched off and the fault is

reported by pulling the FAULT low. The FAULT signal is

latched low until reset by the enable signal being deasserted

at which time the FAULT signal will clear.

See Figure 1 for typical application configuration

FIGURE 1. ISL6121 TYPICAL APPLICATION

GND

VIN

FAULT

OUT

Data Sheet

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

1-888-INTERSIL or 321-724-7143

Features

• 0.05Ω Integrated Power N-channel MOSFET Switch

• Accurate Current Sensing and Limiting

• 12ms Timed Fault Latch-Off, No thermal Dependency

• 2.5V to 5.5V Operating Range

• Under Voltage Lockout

• Disabled Output Internally Pulled Low

• Controlled Turn On/Off Ramp Times

• Fault Output Signal

• Logic Level Enable High Inputs (ISL6121H) or Enable Low

• Logic Level Compatible Enable Input and Fault Output

• Pb-Free Available (RoHS Compliant)

Applications

• Fibre Channel

• Industrial Power Control

• Hot Plug

Ordering Information

NOTE: Intersil Pb-free products employ special Pb-free material sets;

molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and compatible with

both SnPb and Pb-free soldering operations. Intersil Pb-free products

are MSL classified at Pb-free peak reflow temperatures that meet or

exceed the Pb-free requirements of IPC/JEDEC J STD-020C.

ISL6121HIB

ISL6121HIBZA

(See Note)

ISL6121HIB-T

ISL6121HIBZA-T

(See Note)

ISL6121LIB

ISL6121LIBZA

(See Note)

ISL6121LIB-T

ISL6121LIBZA-T

(See Note)

ISL6121HEVAL1

November 12, 2004

Inputs (ISL6121L)

NUMBER

PART

Evaluation Platform

TEMP. RANGE

Intersil and Design is a trademark of Intersil Americas Inc.

-40 to 85

(Pb-free)

-40 to 85

(°C)

8 Ld SOIC

(Pb-free)

8 Ld SOIC Tape and Reel

8 Ld SOIC

(Pb-free)

8 Ld SOIC Tape and Reel

(Pb-free)

PACKAGE

ISL6121

FN9004.2

M8.15

DWG. #

PKG.

Related parts for ISL6121LIB

ISL6121LIB Summary of contents

Page 1

... Note) ISL6121HIB-T ISL6121HIBZA-T (See Note) ISL6121LIB ISL6121LIBZA . (See Note) ISL6121LIB-T ISL6121LIBZA (See Note) ISL6121HEVAL1 NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate C L termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Simplified Block Diagram GND VIN VIN EN Pin Descriptions PIN # SYMBOL FUNCTION 1 GND IC GND Reference 2, 3 VIN Chip Bias, Controlled Supply Input, Undervoltage Lock-Out 4 ENABLE / Enable / Enable Not Input ENABLE 5 FAULT Over ...

Page 3

Absolute Maximum Ratings Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0V EN, FAULT ...

Page 4

Introduction The ISL6121 is a single channel Overcurrent (OC) fault protection IC for the +2.5V to +5V environment. Each ISL6121 incorporates in a single 8 lead SOIC package a 50mΩ N channel MOSFET power switch for power control. See Figure ...

Page 5

Typical Performance Curves ON ENABLE OFF FAULT LATCH-OFF SET VOUT OVER CURRENT IOUT 12ms CURRENT REGULATION PERIOD FIGURE 2. OPERATIONAL WAVEFORMS ENABLE CL = 0.1µF, 10µ 100µF L VOUT (1V/DIV.) FIGURE 4. VOUT SOFT START vs CLOAD 2400 ...

Page 6

Typical Performance Curves 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 FAULT CURRENT (A) FIGURE 8. CR SETTLING TIME vs FAULT CURRENT C = 10µ 0.1µF L VOUT (1V/DIV.) FIGURE ...

Page 7

Using the ISL6121EVAL1 Platform General and Biasing Information The ISL6121EVAL1 platform, Figure 17, allows evaluation of the ISL6121 power supply control IC and comparison against a suitably sized (1.85A hold current rating) PPTC component. The evaluation platform is biased and ...

Page 8

PPTC OC RESPONSE TIME ISL6121 VOUT VOUT (1V/DIV.) FIGURE 16. ISL6121 vs PPTC WITH EXTENDED 1.6Ω LOAD C1 1 OUT VIN 2 VIN OUT C4 ISL6121H 3 VIN OUT R10 4 EN FAULT_OUT R11 FIGURE 17. ...

Page 9

... Electrolytic, Radial Lead 0805, SMD LEDs Red Raychem, RUSB185 or Equivalent 100µF 16V Electrolytic, Radial Lead Intersil, ITF86110DK8T, 7.5A, 30V, 0.025Ω Dual N-Channel MOSFETs 47Ω, 0805 1.2KΩ, 0805, R10 Not Populated FN9004.2 November 12, 2004 ...

Page 10

Implementing Autoreset on the ISL6121 Hot Swap Controller. Abstract In applications where the cost, complexity or requirement for a system controller is avoided and an autonomous power control function is desired, a device that can monitor and protect against excessive ...

Page 11

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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