SPI-8001TW Datasheet, PDF (1/10 Pages) Allegro MicroSystems – Dual 1.5 A, DC/DC Step-Down Converter

SwRitecghuinlagtors
SPI-8001TW
Dual 1.5 A, DC/DC Step-Down Converter
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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V_I, V_CC, V_CE . . . . . 21 V
Output Current, I_O . . . . . . . . . . . 1.5 A*
Junction Temperature, T_J . . . . +135°C
Storage Temperature Range,
T_S . . . . . . . . . . . . -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.
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
Always order by complete part number, e.g., SPI-8001TW-TL ,
where “-TL” indicates tape and reel.
Sanken Power Devices
from Allegro MicroSystems