SI-3120KM Datasheet, PDF (1/9 Pages) Allegro MicroSystems – 1 A, Low-Dropout, 12 V Regulator

LRinegeuarlators
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V_I . . . . . . . . . . . . . 35 V
Output Current, I_O . . . . . . . . . . . . . 1 A*
Enable Input Voltage, V_E . . . . . . . . . V_I
Junction Temperature, T_J . . . . +125°C
Storage Temperature Range,
T_S . . . . . . . . . . . . -30°C to +125°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 +125°C.
SI-3120KM
1 A, Low-Dropout, 12 V Regulator
Designed to meet the high-current requirements in industrial and
consumer applications; embedded core, memory, or logic supplies; TVs,
VCRs, and office equipment, the SI-3120KM voltage regulator offers
the reduced dropout voltage and low quiescent current essential for
improved efficiency. This device delivers a regulated output at up to
1 A. Integrated thermal and overcurrent protection enhance overall
system reliability. Devices with other output voltages are also available.
Quiescent current does not increase significantly as the dropout
voltage is approached, an ideal feature in standby/resume power systems
where data integrity is crucial. Regulator accuracy and excellent
temperature characteristics are provided by a bandgap reference. An
LS-TTL/CMOS-compatible input gives the designer complete control
over power up, standby, or power down. A pnp pass element provides a
dropout voltage of less than 600 mV at 1 A of load current. Low output
voltages eliminate the need for expensive PWM buck converters. The
low dropout voltage permits more efficient regulation before output
regulation is lost.
This device is supplied in a 5-lead TO-252 style surface-mount
plastic package with ground tab to provide a low-resistance path for
maximum heat dissipation.
FEATURES
■ 1 A Output Current at 12 V
■ 0.6 V Maximum Dropout Voltage at I_O = 1 A
■ Fast Transient Response
■ 1 µA Maximum Standby Current
■ Remote Voltage Sensing
■ Foldback Current Limiting
■ Overvoltage Protection
■ Ground Tab for Superior Heat Dissipation
■ Thermal Protection
APPLICATIONS
■ TVs, VCRs, Electronic Games
■ Embedded Core, Memory, or Logic Supplies
■ Printers and Other Office Equipment
■ Industrial Machinery
■ Secondary-Side Stabilization of Multi-Output SMPS
Always order by complete part number, e.g., SI-3120KM-TL ,
where “-TL” indicates tape and reel.
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