ISL6436LIB Intersil, ISL6436LIB Datasheet

ISL6436LIB

Manufacturer Part Number

ISL6436LIB

Description

IC CTRLR PS USB DUAL PORT 8-SOIC

Manufacturer

Intersil

Datasheet

1.ISL6436LIB.pdf (12 pages)

Specifications of ISL6436LIB

Controller Type

USB 2.0 Controller

Voltage - Supply

2.5 V ~ 5.5 V

Current - Supply

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

Interface

Current page: 1 of 12
Download datasheet (903Kb)

USB Dual Port Power Supply Controller

The ISL6436 is a USB dual port power controller, fully

independent overcurrent (OC) fault protection IC.

Operational over the +2.5V to +5.5V range, this device

features internal current monitoring, accurate current

limiting, integrated power switches and current limited

delay to latch-off for system protection.

The ISL6436 current sense and limiting circuitry sets the

current limit to a nominal 1A, making this device well suited for

the USB port power management application. The ISL6436

provides OC fault notification, accurate current limiting and a

consistent timed latch-off thus isolating and protecting the

voltage bus in the presence of an OC event or short circuit. The

12ms time to latch-off is independent of the adjoining switch’s

electrical or thermal condition and the OC response time is

inversely related to the OC magnitude.

Each ISL6436 incorporates in a single 8 lead SOIC

package two 80m

for power control. Each 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 inrush current while charging

heavy load capacitances. Independent enabling inputs and

fault reporting outputs for each channel are compatible with

3V and 5V logic to allow external control and monitoring.

The ISL6436 undervoltage lockout feature prevents turn-on

of the outputs unless the correct ENABLE state and VIN >

2.5V are present. During initial turn-on the ISL6436

prevents fault reporting by blanking the fault signal. Rising

and falling outputs are current limited voltage ramps 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

appropriate output is current limited for 12ms to allow

transient conditions to pass. If still in current limit after the

current limit period has elapsed, the output is then latched

off and the fault is reported by pulling the corresponding

FAULT low. The FAULT signal is latched low until reset by

the ENABLE signal being de-asserted at which time the

FAULT signal will clear.

N-channel MOSFET power switches

Data Sheet

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

1-888-INTERSIL or 321-724-7143

Features

• 80m Integrated Power N-channel MOSFET Switches

• Accurate Current Sensing and 1A Current Limiting

• 12ms Fault Delay to Latch-Off, No Thermal Dependency

• 2.5V to 5.5V Operating Range

• Disabled Output Internally Pulled Low

• Undervoltage Lockout

• Controlled Turn-on Ramp Time

• Channel Independent Fault Output Signals

• Compatible with 3.3V and 5V Logic Families

• Channel Independent Logic Level Enable High Inputs

Applications

• USB Port Power Management

• Electronic Circuit Limiting and Breaker

Ordering Information

Pinout

ISL6436LIB

ISL6436LIB-T

ISL6436HIB

ISL6436HIB-T

ISL6436EVAL1

ISL6436USBEVAL1 USB Dual Port Evaluation Platform

(ISL6436H) or Enable Low Inputs (ISL6436L)

PART NUMBER

ENABLE_2

ENABLE_1

August 2001

GND

VIN

Evaluation Platform

Intersil and Design is a trademark of Intersil Americas Inc.

-40 to 85 8 Lead SOIC

-40 to 85 8 Lead SOIC Tape and Reel

-40 to 85 8 Lead SOIC

-40 to 85 8 Lead SOIC Tape and Reel

RANGE

TEMP.

(

ISL6436 (SOIC)

TOP VIEW

PACKAGE

File Number

ISL6436

FAULT_2

FAULT_1

OUT_1

OUT_2

M8.15

PKG. NO.

9023

Related parts for ISL6436LIB

ISL6436LIB Summary of contents

Page 1

... Electronic Circuit Limiting and Breaker Ordering Information TEMP. RANGE o PART NUMBER ( C) ISL6436LIB - Lead SOIC ISL6436LIB-T - Lead SOIC Tape and Reel ISL6436HIB - Lead SOIC ISL6436HIB-T - Lead SOIC Tape and Reel ISL6436EVAL1 Evaluation Platform ISL6436USBEVAL1 USB Dual Port Evaluation Platform Pinout ISL6436 (SOIC) ...

Page 2

Typical Application: Dual USB Port Power Simplified Block Diagram GND VIN EN_1 EN_2 ENABLE_1 FAULT_1 +5V VIN ISL6436L FAULT_2 ENABLE_2 D+ D- CHANNEL 1 ...

Page 3

Pin Descriptions PIN NO. DESIGNATOR FUNCTION 1 GND IC Reference 2 VIN Chip bias, Controlled Supply Input, Undervoltage lock-out 3, 4 ENABLE_1 Channel Enable / ENABLE_1,2 Enable Not Inputs 5, 8 FAULT_2, 1 Channel 2, 1 Over Current ...

Page 4

Absolute Maximum Ratings Supply Voltage (VIN to GND 6.0V EN, FAULT . . . ...

Page 5

UV Lock Out The ISL6436 undervoltage lockout feature prevents functionality of the device unless the correct ENABLE state and VIN > 2.5V are present. Soft Start A constant 500nA current source ramps up the switch’s gate causing a voltage follower ...

Page 6

Typical Performance Curves 120 110 100 VIN = 2. VIN = 3. -40 -30 -20 - TEMPERATURE ( FIGURE 2. SWITCH ON RESISTANCE AT ...

Page 7

Typical Performance Curves ENABLE 100 0 VOUT VOLTAGE (1V/DIV.) FIGURE 8. SLOW TURN -OFF vs C FAULT VOUT (1V/ DIV.) FIGURE 10. ISL6436L TURN-ON INTO 1.5A OCS ...

Page 8

Typical Performance Curves PPTC ISL6436 0.012s VOUT (1V/ DIV.) FIGURE 14. ISL6436 vs PPTC PLUGGED ONTO 1.5A LOAD ENABLE ISL6436 COMP IC VOUT (1V/ DIV.) FIGURE 16. COMPARATIVE TURN-ON WAVEFORMS (Continued) TIME (10ms/DIV.) VOUT (1V/DIV.) FIGURE ...

Page 9

Using the ISL6436EVAL1 Platform General and Biasing Information The ISL6436EVAL1 platform, Figure 19, allows evaluation of the ISL6436 dual power supply control IC and comparison against a suitably sized PPTC component. The evaluation platform is biased and monitored through numerous ...

Page 10

... SW1 R10 Intersil, ISL6436LIB 3.3V Aux HotPlug Controller YAGEO, 10 YAGEO, 5 5%, 5W, 5W-5-ND 470 , 0805 0.1 F, 0805 10 F 16V Electrolytic, Radial Lead 0805, SMD LEDs Red Raychem, Poly Switch, RXE075 or Equivalent Intersil, ITF86110DK8T, 7.5A, 30V, 0.025 , Dual N-channel, Logic Level Power MOSFET ...

Page 11

... Dual Stacked USB Type A Connector Pull-Up Resistors 11 C1 FAULT_OUT 1 VIN 2 R1 ISL6436 FAULT_OUT FIGURE 20. ISL6436USBEVAL BOARD TABLE 4. COMPONENT DESCRIPTION Intersil, ISL6436L 5V USB HotPlug Controller 0.1 F, 0805 100 F 16V Electrolytic, Radial Lead 220nH, 0805 (OPTIONAL FOR IMPLEMENTATION) ASSMANN, AU-Y1008 or Equivalent 1.2 k, 0805 8 OUT 7 OUT ...

Page 12

... 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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