SPI-8001TW-TL ALLEGRO [Allegro MicroSystems], SPI-8001TW-TL Datasheet

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SPI-8001TW-TL

Manufacturer Part Number
SPI-8001TW-TL
Description
Dual 1.5 A, DC/DC Step-Down Converter
Manufacturer
ALLEGRO [Allegro MicroSystems]
Datasheet
Input Voltage, V
Output Current, I
Junction Temperature, T
Storage Temperature Range,
* Output current rating is limited by input
ABSOLUTE MAXIMUM RATINGS
voltage, duty cycle, and ambient tempera-
ture. Under any set of conditions, do not
exceed a junction temperature of +135°C.
T
S
. . . . . . . . . . . . -40°C to +135°C
I
, V
O
. . . . . . . . . . . 1.5 A*
CC
, V
CE
J
. . . . +135°C
. . . . .
21 V
Dual 1.5 A, DC/DC Step-Down Converter
SPI-8001TW
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.
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.
with exposed pad to provide a low-resistance path for maximum power
dissipation, low junction temperature, and improved reliability.
FEATURES
APPLICATIONS
Always order by complete part number, e.g., SPI-8001TW-TL ,
where “-TL” indicates tape and reel.
from Allegro MicroSystems
Sanken Power Devices
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
TVs, VCRs, Electronic Games
Embedded Core, Memory, or Logic Supplies
Printers and Other Office Equipment
Industrial Machinery
Designed to meet high-current requirements at high efficiency in
A wide input voltage range and integrated thermal and overcurrent
This device is supplied in a 16-lead surface-mount plastic SOIC

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SPI-8001TW-TL Summary of contents

Page 1

... Exposed Pad for Superior Heat Dissipation Thermal Protection 21 V 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 ...

Page 2

... SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter Allowable Package Power Dissipation 2 FUNCTIONAL BLOCK DIAGRAM Recommended Operating Conditions DC Input Voltage Input Voltage Output Current Output Voltage, V Operating Junction Temp. *The recommended maximum value when the output value is more than 2 V, derated linearly when the output † ...

Page 3

... open CCQ CE V CEH V CEL Converter turn-off voltage SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter = 15 V (unless otherwise noted). Min. Typ. 0.996 1.006 1.016 — ±0.1 1.6 — — 0.5 A, — 83 — 250 = — ...

Page 4

... SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter Efficiency Load Regulation 4 TYPICAL CHARACTERISTICS (T = 25°C) A Low-Voltage Behavior 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 Efficiency Load Regulation ...

Page 5

... Overcurrent Protection Soft-Start Current www.allegromicro.com TYPICAL CHARACTERISTICS (cont 25°C) A Temperature Stability SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter Overcurrent Protection Chip Enable Control Voltage 5 ...

Page 6

... Catch Diodes (D1 and D2). Diode D1 and D2 must be Schottky diodes. Other diode types will result in increased forward voltage spikes, reverse current flow, increased IC power dissipation during the off period, and possible destruction of the IC. Choke Coils (L1 and L2). If the winding resistance of the choke coil is too high, the circuit efficiency will de- crease ...

Page 7

... Overcurrent Protection. The SPI-8000TW series has a built-in fold-back type overcurrent protection circuit, which limits the output current at a start-up mode. It thus cannot be used in applications that require current at the start-up mode such as: (1) constant-current load, (2) power supply with positive and negative outputs to ...

Page 8

... SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter Lead Temperature (T ) Measured at L Terminal Product Weight: Approx. 0.859 g 8 Dimensions in Millimeters Recommended Land Pattern 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 View A ...

Page 9

... Tape and Reel Dimensions in Millimeters www.allegromicro.com SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter EI17EI 9 ...

Page 10

... SPI-8001TW Dual 1.5 A, DC/DC Step-Down Converter The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc. Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products ...

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