SI-8050JD
Step-Down to 5.0 V, 1.5 A, DC/DC 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 or telecommunications equipment, the
SI-8050JD dc/dc step-down (buck) converter offers a constant 125 kHz
switching frequency essential for low EMI noise. The npn switch is
included on the die along with the oscillator, control, and logic circuitry
requiring only four external components for a regulated 5.0 V output at
up to 1.5 A. .
A wide input voltage range and integrated thermal and overcurrent
protection enhance overall system reliability. Reference accuracy and
excellent temperature characteristics are provided. An output-enable
input gives the designer complete control over power up, standby, or
powerdown.
This device is supplied in a 5-lead surface-mount plastic package
(TO-263) with ground tab to provide a low-resistance path for maximum
heat dissipation. A similar device in a flange-mounted (TO-220-style)
high-power package is the SI-8050JF.
FEATURES
■ 7 V to 40 V Input Range
■ 1.5 A Output Current at 5.0 V
■ 2% Output Voltage Tolerance
■ Foldback Current Limiting
■ Constant 125 kHz Switching Frequency
■ 200 µA Maximum Standby Current
■ Soft Start Prevents Supply Voltage Dip
■ RemoteVoltageSensing
■ Exposed Pad for Superior Heat Dissipation
■ ThermalProtection
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VI . . . . . . . . . . . . . 43 V
Output Current, IO . . . . . . . . . . . 1.5 A*
Enable Input Voltage, VOE . . . . . . . . . . . 6 V
Junction Temperature, TJ . . . . +125°C
APPLICATIONS
■ TVs, VCRs, Electronic Games
■ Embedded Core, Memory, or Logic Supplies
■ Printers and Other Office Equipment
■ Industrial Machinery
Storage Temperature Range,
TS . . . . . . . . . . . . -40°C to +125°C
■ TelecommunicationsEquipment
* 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 +125°C.
Always order by complete part number, e.g., SI-8050JD-TL ,
where “-TL” indicates tape and reel.
Sanken Power Devices
from Allegro MicroSystems
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
