SP6659_06 datasheet(2/11 Pages) SIPEX

2 / 11 page

Date: 9/25/06 Rev C

SP6659 1.5MHz, 600mA Synchronous Buck Regulator

PIN DESCRIPTION

Input Supply Voltage ......................................................... -0.3V to +6V

RUN, V

FBVoltages .................................................. -0.3V to (VIN + 0.3V)

SW Voltage ............................................................ -0.3V to (V

IN + 0.3V)

P-Channel Switch Source Current (DC) ..................................... 800mA

N-Channel Switch Sink Current (DC) ......................................... 800mA

Peak Switch Sink and Source Current ........................................... 1.3A

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

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

Junction Temperature (Note 1) .................................................. 125 °C

Lead Temperature (Soldering, 10 sec) ....................................... 300 °C

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the

specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

ELECTRICAL CHARACTERISTICS

Note 1: Junction Temperature TJ is calculated from the ambient temperature TA and ower dissipation PD

according to the following formula: TJ = TA + PD X 220°C/W

PIN #

PIN NAME

DESCRIPTION

RUN

Power down control pin. Forcing this pin above 1.5V enables the device. Forcing this

pin below 0.3V shuts down the device.

GND

Ground pin.

Switching node.

Power supply pin

VFB/ V

OUT

Adjustable Version: VFB, Feedback Input Pin. Connect FB to the center point of the

external resistor divider. The feedback threshold voltage is 0.6V.

Fixed Output Version: VOUT, Output Voltage Feedback Pin. An internal resistive

divider drops the output voltage down for comparison to the internal reference voltage.

___________________________ THERMAL

RESISTANCE

Thermal Resistance is specified with approximately 1 square inch of 1 ounce copper.

JA ................................................................207.4 ° C/W

JC ...............................................................110 ° C/W

VIN = VRUN = 3.6V, Io = 0mA, T AMB = -40ºC to +85ºC, typical values at 25ºC unless otherwise noted.

The ♦ denotes the specifications which apply over the full operating temperature range, unless otherwise specified.

PARAMETER

MIN

TYP

MAX

UNITS

Input Voltage Range

2.5

5.5

♦

Input DC Supply Current

Active Mode

300

400

µA

VFB = 0.5V, VIN = VRUN

Shutdown Mode

0.1

µA

VIN = 3.6V, VRUN = 0.0V

0.5880

0.6000

0.6120

TA = +25ºC

0.5865

0.6000

0.6135

0ºC < TA < +85ºC

0.5820

0.6000

0.6180

♦

-40ºC < TA < +85ºC

VFB Input Bias Current

300

VFB = 1.0V

VFB Line Regulation

0.4

%/V

♦

VIN = 2.5V to 5.5V

VFB Load Regulation

0.01

%/mA

♦

ILOAD = 0mA to 600mA

1.455

1.500

1.545

♦

SP6659EK1-1.5, -40ºC < TA < +85ºC

1.746

1.800

1.854

♦

SP6659EK1-1.8, -40ºC < TA < +85ºC

Minimum Output Voltage

0.6

Peak inductor current

0.7

1.0

1.2

VFB = 0.5V, VIN = 2.5V

Oscillator frequency

0.8

1.4

1.8

MHz

♦

Closed Loop, ILOAD = 100mA

P-channel ON resistance

0.4

0.6

Ω

ISW = 100mA

N-channel ON resistance

0.4

0.6

Ω

ISW = -100mA

VIN = 3.6V, VRUN = 0.0V,

Vsw = 0.0V, Vsw = VIN

Run Threshold Voltage

0.2

1.3

♦

Run Leakage Current

±0.01

±1.5

µA

♦

CONDITIONS

Regulated Output Voltage

±1.0

µA

VFB (Feedback Voltage)

SW Leakage Current

±0.01

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