ISL6420BIAZ-TK datasheet(6/20 Pages) INTERSIL

Part #	ISL6420BIAZ-TK

Description	Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

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Manufacturer	INTERSIL [Intersil Corporation]

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6 / 20 page

6

FN6901.0

April 27, 2009

Absolute Maximum Ratings (Note 1)

Thermal Information

Bias Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+30V

BOOT and UGATE Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +36V

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

QFN Package (Notes 2, 3). . . . . . . . . .

47

8.5

QSOP Package (Note 2) . . . . . . . . . . .

90

NA

Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C

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

Ambient Temperature Range. . . . . . . . -40°C to +85°C (for “I” suffix)

Junction Temperature Range. . . . . . . . . . . . . . . . . . -40°C to +125°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.

NOTES:

1. All voltages are with respect to GND.

2.

θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

Tech Brief TB379.

3. For

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

Electrical Specifications

Operating Conditions: VIN = 12V, PVCC shorted with VCC5, TA = +25°C; 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

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VIN SUPPLY

Input Voltage Range

5.6

12

28

V

VIN SUPPLY CURRENT

Shutdown Current (Note 4)

ENSS = GND

-

1.4

-

mA

Operating Current (Notes 4, 5)

-2.0

3.0

mA

VCC5 SUPPLY (Notes 5, 6)

Input Voltage Range

VIN = VCC5 for 5V configuration

4.5

5.0

5.5

V

Output Voltage

VIN = 5.6V to 28V, IL = 3mA to 50mA

4.5

5.0

5.5

V

Maximum Output Current

VIN = 12V

50

-

mA

POWER-ON RESET

Rising VCC5 Threshold

VIN connected to VCC5, 5V input

operation

4.310

4.400

4.475

V

Falling VCC5 Threshold

4.090

4.100

4.250

V

UVLO Threshold Hysteresis

0.16

-

V

PWM CONVERTERS

Maximum Duty Cycle

fSW = 300kHz

90

96

-

%

Minimum Duty Cycle

fSW = 300kHz

-

0

%

FB Pin Bias Current

-80-

nA

Undervoltage Protection

VUV

Fraction of the set point; ~3µs noise filter

75

-

85

%

Overvoltage Protection

VOVP

Fraction of the set point; ~1µs noise filter

112

-

120

%

OSCILLATOR

Free Running Frequency

RT = VCC5, TA = -40°C to +85°C

270

300

330

kHz

Total Variation

TA = -40°C to +85°C, with frequency set

by external resistor at RT

-

±10%

-

%

Frequency Range (Set by RT)

VIN = 12V

100

-

1400

kHz

Ramp Amplitude (Note 7)

ΔVOSC

-1.25-

VP-P

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