SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
The SI-3033LSA is designed to meet the requirement for increased
integration and reliability in low-voltage, high-current, linear regulator
applications such as personal computers (PCs) and set-top boxes. Each
device incorporates a monolithic low-level reference and control circuit
with a high-current pnp transistor in a power multi-chip module
(PMCM™). Regulated output voltages of 1.8 V or 2.5 V are also
available.
The high-current pass element provides a low dropout voltage with
output current to 1 A. Regulator accuracy of
±2
% and excellent
temperature characteristics are provided. The logic-compatible
ENABLE input gives the designer complete control over power up,
power down, and standby or sleep.
These devices are supplied in a fully molded 8-lead miniature
surface-mount package (tape and reel) with enhanced power-dissipating
qualities. They are rated for continuous operation between -30°C and
+100°C.
Data Sheet
27468.33
IN
INTERNAL
CONNECTION
SUPPLY
ENABLE
1
2
3
4
8
OUT
OUT
GND
GND
IC
VR
V
S
SUB
7
6
5
Dwg. PK-012
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V
I
................................
16 V
Supply Voltage, V
S
............................
16 V
Continuous Output Current, I
O
........
1.0 A*
Logic Input Voltage, V
E
.........................
V
S
Package Power Dissipation,
P
D
........................................
See Graph
Output Junction Temperature,
T
J
............................................
+150
°
C†
Operating Temperature Range,
T
A
...............................
-30
°
C to +100
°
C
Storage Temperature Range,
T
stg
.............................
-30
°
C to +150
°
C
* Output current rating may be limited by duty
cycle, ambient temperature, and heat sinking.
Under any set of conditions, do not exceed the
specified current rating or a junction temperature
of 150˚C.
† Fault conditions that produce excessive
junction temperature will activate the device’s
thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
FEATURES
s
s
s
s
s
s
1 A Output Current
Low Dropout voltage
LSTTL/CMOS-Compatible On/Off Control
Less Than 1
µA
“Sleep” Current
Internal Foldback Overcurrent Limiting
Internal Thermal Shutdown
Surface-Mount Package
Always order by complete part number:
SI-3033LSA-TL
,
where “-TL” indicates tape and reel.
TM
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
