3

FN6265.1

December 14, 2007

Absolute Maximum Ratings

Thermal Information

Lx to GND, AGND and PGND . . . . . . . . . . . . . . . . . . . . -0.5 to +25V

VDD2, OUT, NEG and POS

to GND, AGND and PGND . . . . . . . . . . . . . . . . . . . . . -0.5 to +25V

VDD1, VGH and VGH_M

to GND, AGND and PGND . . . . . . . . . . . . . . . . . . . . . -0.5 to +32V

Differential Voltage Between POS and NEG . . . . . . . . . . . . . . . ±6V

Voltage Between GND, AGND and PGND . . . . . . . . . . . . . . . ±0.5V

All Other Pins to GND, AGND and PGND . . . . . . . . . . -0.5 to +6.5V

Input, Output, or I/O Voltage . . . . . . . . . . . GND -0.3V to VIN + 0.3V

Recommended Operating Conditions

Input Voltage Range, VS . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V

Boost Output Voltage Range, AVDD . . . . . . . . . . . . . . . . . 8V to 20V

Input Capacitance, CIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22µF

Boost Inductor, L1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3µH to 10µH

LDO Output Capacitance. . . . . . . . . . . . . . . . . . . . . . .2.2µF to 10µF

Output Capacitance, COUT . . . . . . . . . . . . . . . . . . . . . . . . . . 2x22µF

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

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

Thermal Resistance

θ

θ

4x4 QFN Package (Notes 1, 2) . . . . . .

39

2.5

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

Maximum Continuous Junction Temperature . . . . . . . . . . . +125°C

Power Dissipation

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.

θ

Brief TB379.

2. For

θ

Electrical Specifications

Unless Otherwise Noted.

SYMBOL

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

GENERAL

See separate LDO specifications on

page 4

2.7

5.0

5.5

V

when Disabled

ENABLE = 0V

0.2

2

µA

ENABLE = 5V, LX not switching, LDO

not loaded

1mA

UVLO

Undervoltage Lockout Threshold

2.3

2.45

2.6

V

2.2

2.35

2.5

V

Thermal Shutdown Temperature

Temperature Rising

140

°C

Temperature Falling

100

°C

LOGIC INPUT CHARACTERISTICS - ENABLE, VFLK, FREQ, VDPM

Low Voltage Threshold

0.8

V

High Voltage Threshold

2.2

V

Pull-Down Resistor

150

250

400

k

Ω

STEP-UP SWITCHING REGULATOR

Output Voltage Range

VIN*1.25

20

V

ΔA

Load Regulation

50mA < ILOAD < 250mA

0.2

%

ΔA

Line Regulation

0.15

0.25

%/V

Overall Accuracy (Line, Load,

Temperature)

-3

3

%

ISL97646