Designed to meet high-current requirements at high efficiency in

industrial and consumer applications; embedded core, memory, or logic

supplies; TVs, VCRs, and office equipment, the SPI-8001TW dc/dc

step-down (buck) converter offers a constant 250 kHz switching fre-

quency essential for small external components. The n-channel high-

current FET is included on the die along with the oscillator, control, and

logic circuitry.

A wide input voltage range and integrated thermal and overcurrent

protection enhance overall system reliability. Reference accuracy and

excellent temperature characteristics are provided. A chip-enable input

gives the designer complete control over power up, standby, or power

down. A similar device, with increased input and output voltage ratings,

is the SPI-8002TW.

This device is supplied in a 16-lead surface-mount plastic SOIC

with exposed pad to provide a low-resistance path for maximum power

dissipation, low junction temperature, and improved reliability.

FEATURES

To 20 V Input Range

Adjustable 1 V to 16 V Output Range

1% Output Voltage Tolerance

To 1.5 A Output Current

Foldback Current Limiting

Constant 250 kHz Switching Frequency

1.0 μA Maximum Standby Current

1.0 V Feedback Reference Voltage

Soft Start Avoids Supply Voltage Dip

Remote Voltage Sensing

Exposed Pad for Superior Heat Dissipation

Thermal Protection

APPLICATIONS

TVs, VCRs, Electronic Games

Embedded Core, Memory, or Logic Supplies

Printers and Other Office Equipment

Industrial Machinery

Dual 1.5 A, DC/DC Step-Down Converter

Always order by complete part number, e.g., SPI-8001TW-TL ,

where “-TL” indicates tape and reel.

ABSOLUTE MAXIMUM RATINGS

Input Voltage, V

21 V

Output Current, I

1.5 A*

Junction Temperature, T

+135°C

Storage Temperature Range,

T

-40°C to +135°C

* Output current rating is limited by input

voltage, duty cycle, and ambient tempera-

ture. Under any set of conditions, do not

exceed a junction temperature of +135°C.

SPI-8001TW

Sanken Power Devices

from Allegro MicroSystems

Switching

Regulators