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PDF SI-3120KM Data sheet ( Hoja de datos )
| Número de pieza | SI-3120KM | |
| Descripción | 1A Low Dripout 12V Regulator | |
| Fabricantes | Allegro Microsystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SI-3120KM (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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wLwRinewgeua.rlDatoarstaSheet4Uw.co.mDatSaSI1 -Ah,3eLo1ew-t2D4ro0UpoK.uct, o1M2mV RegulatorABSOLUTEMAXIMUMRATINGS
wInput Voltage, VI . . . . . . . . . . . . . 35 V
w omOutput Current, IO . . . . . . . . . . . . . 1 A*
.cEnable Input Voltage, VE . . . . . . . . . VI
t4UJunction Temperature, TJ . . . . +125°C
eStorage Temperature Range,
heTS . . . . . . . . . . . . -30°C to +125°C
S* Output current rating is limited by input
tavoltage, duty cycle, and ambient tempera-
ature. Under any set of conditions, do not
www.Dexceed a junction temperature of +125°C.
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 IO = 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.
Sanken Power Devices
from Allegro MicroSystems
1 page  
LRinegeuarlators
SI-3120KM
1 A, Low-Dropout,
12 V Regulator
TYPICAL CHARACTERISTICS (cont.)
(VI = 14 V, TA = 25°C)
Overvoltage Protection
GND Pin Current
APPLICATIONS INFORMATION
Input Capacitor (CI, ≥22 µF). This is necessary either
when the input line includes inductance or when the wiring
is long.
Output Capacitor (CO, ≥47 µF). This device is not
designed for a use with a very low ESR output capacitor
such as a ceramic capacitor. Output oscillation may occur
with that kind of capacitor. The recommended ESR is
0.2~2 Ω at TA = 25°C.
Reverse-Bias Protection Diode (D1). Diode D1
provides reverse-bias protection between the input and
output. Sanken type SFPL-52 is recommended.
ENABLE Input. The ENABLE (control) input features
an internal pull-down resistor. Leaving this input open
causes the output to turn off.
Parallel Operation. Parallel operation to increase load
current is not permitted.
Increased Output Voltage. The output voltage (VO)
may be increased by inserting a resistor (REXT) between
SENSE and OUTPUT. The current flowing into SENSE is
typically 90 µA ±30%. To minimize the effect of ISENSE
and temperature on REXT, it is recommended that a 24 kΩ
resistor be added between SENSE and GND to increase the
current in REXT. The value of REXT is then
REXT = (VO – 12) × 106/600
www.allegromicro.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet SI-3120KM.PDF ] | |
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