SI-3033ZD Datasheet, PDF (1/9 Pages) Allegro MicroSystems – High-Current, Low-Dropout, 3.3 V Regulator

LRinegeuarlators
SI-3033ZD
High-Current, Low-Dropout, 3.3 V Regulator
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V_I . . . . . . . . . . . . . 10 V
Output Current, I_O . . . . . . . . . . . . . 3 A*
Enable Input Voltage, V_E . . . . . . . . 6 V
Junction Temperature, T_J . . . . +125°C
Storage Temperature Range,
T_S . . . . . . . . . . . . -40°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.
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-3033ZD voltage regulator offers the
reduced dropout voltage and low quiescent current essential for im-
proved efficiency. This device delivers a regulated output at up to 3 A.
Integrated thermal and overcurrent protection enhance overall system
reliability. Devices with an adjustable 1.2 ~ 5 V output or a 2.5 V fixed
output 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 3 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 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-3025ZF.
FEATURES
■ 3 A Output Current at 3.3 V
■ 0.6 V Maximum Dropout Voltage at I_O = 3 A
■ 1 µA Maximum Standby Current
■ Remote Voltage Sensing
■ Foldback Current Limiting
■ 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-3033ZD-TL ,
where “-TL” indicates tape and reel.
Sanken Power Devices
from Allegro MicroSystems