2

Date: 07/20/05

SP6659 1.5MHz, 600mA Synchronous Buck Regulator

© Copyright 2005 Sipex Corporation

PIN DESCRIPTION

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

RUN, V

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

P-Channel Switch Source Current ............................................. 800mA

N-Channel Switch Sink Current .................................................. 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

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

PIN #

PIN NAME

DESCRIPTION

1

RUN

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

pin below 0.3V shuts down the device.

2

GND

Ground pin.

3SW

Switching node.

4V

IN

Power supply pin

OUT

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

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

Vin=Vrun=3.6V, Io=0mA, Tamb= -40ºC to +85ºC, typical values at 25ºC unless otherwise noted.

Parameter

Min

Typ

Max

Units

Conditions

Input Voltage Range

2.5

5.5

V

Input DC Supply Current

Active Mode

300

400

µA

Vfb = 0.5V, Vin = Vrun

Shutdown Mode

0.1

1

µA

Vin = 3.6V, Vrun = ZeroV

0.5880

0.6000

0.6120

Ta=+25ºC

0.5865

0.6000

0.6135

V

0ºC<Ta<+85ºC

0.5820

0.6000

0.6180

-40ºC < Ta < +85ºC

Vfb Input Bias Current

85

300

nA

Vfb = 1.0V

Vfb Line Regulation

-1

0.4

1

%/V

Vin = 2.5V to 5.5V

Vfb Load Regulation

-0.1

0.01

0.1

%/mA

ILoad = 0mA to 600mA

Regulated Output Voltage

1.455

1.500

1.545

V

SP6659EK1-1.5, -40ºC < Ta < +85ºC

1.746

1.800

1.854

V

SP6659EK1-1.8, -40ºC < Ta < +85ºC

Minimum Output Voltage

0.6

V

Peak inductor current

0.7

1.15

1.5

A

Vfb = 0.5V

Oscillator frequency

0.8

1.4

1.8

mHz

Closed Loop, ILoad=100mA

P-channel ON resistance

0.4

0.6

Ω

N-channel ON resistance

0.4

0.6

Ω

Vrun=ZeroV, Vin = 3.6V

Vsw=ZeroV, Vsw = Vin

Run Threshold Voltage

0.2

1

1.3

V

Run Leakage Current

±0.01

±1.5

µA

±1.0

µA

Vfb (Feedback Voltage)

SW Leakage Current

±0.01