ISL97656 datasheet(2/8 Pages) INTERSIL

2 / 8 page

FN6439.4

April 2, 2010

Absolute Maximum Ratings (TA = +25°C)

Thermal Information

LX to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26V

IN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V

COMP, FB, EN, SS, FREQ to GND . . . . . . . . . . . -0.3V to (IN +0.3V)

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

10 Ld 3x3 TDFN Package (Notes 1, 2)

Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°C

Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +135°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

ΝΟΤΕΣ:

θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

2. For

θJC, the “case temp” location is the center of the exposed metal pad on the package underside.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests

are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA

Electrical Specifications

VIN = 3V, VOUT = 12V, IOUT = 0mA, FREQ = GND, TA = -40°C to +85°C, unless otherwise specified.

Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature

limits established by characterization and are not production tested.

PARAMETER

DESCRIPTION

CONDITIONS

MIN

TYP

MAX

UNIT

IQ1

Quiescent Current - Shutdown

EN = 0V

0.1

µA

IQ2

Quiescent Current - Not Switching

EN = IN, FB = 1.3V

0.7

IQ3

Quiescent Current - Switching

EN = IN, FB = 1.0V

VFB

Feedback Voltage

1.22

1.24

1.26

IB-FB

Feedback Input Bias Current

0.01

0.5

µA

Input Voltage Range

2.3

6.0

DMAX - 640kHz Maximum Duty Cycle

FREQ = 0V

DMAX - 1.2MHz Maximum Duty Cycle

FREQ = IN

ILIM

Current Limit - Max Peak Input Current

3.8

4.0

5.1

IEN

Shutdown Input Bias Current

EN = 0V

0.01

0.5

µA

rDS(ON)

Switch ON Resistance

IN = 2.7V, ILX = 1A

0.12

ILX-LEAK

Switch Leakage Current

VSW = 27V

0.01

µA

ΔVOUT/ΔVIN

Line Regulation

2.3V < VIN < 5.5V, VOUT = 12V

0.2

ΔVOUT/ΔIOUT Load Regulation

VIN = 3.3V, VOUT = 12V, IO = 30mA to 200mA

0.3

FOSC1

Switching Frequency Accuracy

FREQ = 0V

500

640

740

kHz

FOSC2

Switching Frequency Accuracy

FREQ = IN

1000

1220

1500

kHz

VIL

EN, FREQ Input Low Level

0.5

VIH

EN, FREQ Input High Level

1.5

Error Amp Tranconductance

ΔI = 5µA

130

250

1µ/

IN-ON

IN UVLO On Threshold

2.00

2.38

2.57

HYS

IN UVLO hysteresis

ISS

Soft-Start Charge Current

2.5

4.5

7.5

µA

OTP

Over-Temperature Protection

150

°C

ISL97656

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