SPX29300/01/02
3A Low Dropout Voltage Regulator
December 2016
Rev. 2.2.0
GENERAL DESCRIPTION
The SPX29300/01/02 are 3A, highly accurate
voltage regulators with a low dropout voltage of
600mV (typical) at 3A.
These regulators are specifically designed for
low voltage applications that require a low
dropout voltage and a fast transient response.
They are fully fault protected against over-
current, reverse battery, and positive and
negative voltage transients. On-Chip trimming
adjusts the reference voltage to 1% initial
accuracy.
The SPX29300 is offered in a 3-pin TO-263
package, the SPX29301 and SPX29302 are
offered in a 5-pin TO-263 package.
APPLICATIONS
•
Adjustable Power Supplies
•
Constant Current Regulators
•
Audio and Video/Graphic Cards
•
Battery Chargers
FEATURES
•
3A Guaranteed Output Current
•
Low Dropout Voltage of 600mV @ 3A
•
Adjustable Output down to 1.25V
•
1% Output Accuracy
•
Tight Load and Line Regulation
•
Fast Transient Response
•
Reverse Battery Protection
•
Zero Current Shutdown
(SPX29301/02)
•
Power Good Flag
(SPX29301)
•
Lead Free 3-Pin TO-263 and 5-pin TO-
263 Packages
TYPICAL APPLICATION DIAGRAM
Fig. 1: SPX29300 and SPX29302 Application Diagrams
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
SPX29300/01/02
3A Low Dropout Voltage Regulator
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum rating
conditions for extended periods of time may affect
reliability.
Input Voltage V
IN1
................................................... 20V
Storage Temperature .............................. -65°C to 150°C
Lead Temperature (Soldering, 5 sec) ..................... 260°C
ESD Rating (HBM - Human Body Model) ..........................
All pins except EN ................................................. 2kV
En pin ................................................................. 1kV
OPERATING RATINGS
Input Voltage Range V
IN
........................................... 16V
Junction Temperature Range ....................-40°C to 125°C
Thermal Resistance ......................................................
TO-263-3 Junction to Ambient ........................31.4°C/W
TO-263-5 Junction to Ambient ........................31.2°C/W
TO-263-3, TO-263-5 Junction to Case ................. 3°C/W
Note 1: Maximum positive supply voltage of 20V must be
of limited duration (<100ms) and duty cycle of less than
1%. The maximum continuous supply voltage is 16V.
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T
J
= T
A
= 25°C only; limits applying over the
full Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25°C, and are provided for
reference purposes only. Unless otherwise indicated, V
IN
= V
OUT
+ 1V and I
OUT
=10mA, C
IN
= 6.8µF, C
OUT
= 10µF, T
A
= 25°C.
Parameter
Fixed Voltage Versions
Output Voltage, 1.8V Version
Output Voltage, 2.5V Version
Output Voltage, 3.3V Version
Output Voltage, 5.0V Version
All Voltage Versions
Line Regulation
Load Regulation
ΔV/ΔT
Dropout Voltage
Except 1.8V Version (note 3)
Ground Current (note 5)
Ground Pin Current at Dropout
Current Limit
Output Noise Voltage
Reference Voltage
Temperature Coefficient
3.0
0.06
0.2
20
120
380
600
30
40
0.9
4.5
400
260
20
800
60
mA
mA
A
µV
RMS
ppm/˚C
0.5
1
100
300
mV
•
•
%
%
ppm/˚C
•
•
I
OUT
=10mA, (V
OUT
+1V)≤V
IN
≤16V
V
IN
=V
OUT
+ 1V, 10mA≤I
OUT
≤I
FL
(note 2)
V
OUT
Temp Coefficient (note 6)
I
OUT
=100mA
I
OUT
=1.5A
I
OUT
=3A
I
OUT
=1.5A
I
OUT
=3A
V
IN
= 0.5V less than specified V
OUT
I
OUT
=10mA
V
OUT
=0V (note 4)
10Hz-100KHz, I
OUT
=100mA, C
OUT
=10µF
10Hz-100KHz, I
OUT
=100mA, C
OUT
=33µF
Note 7
1.782
1.764
2.475
2.450
3.267
3.234
4.950
4.900
1.800
1.800
2.500
2.500
3.300
3.300
5.000
5.000
1.818
1.836
2.525
2.550
3.333
3.366
5.050
5.100
V
V
V
V
I
OUT
=10mA
•
•
•
•
10mA≤I
OUT
≤3A, 2.8V≤V
IN
≤16V
I
OUT
=10mA
10mA≤I
OUT
≤3A, 3.5V≤V
IN
≤16V
I
OUT
=10mA
10mA≤I
OUT
≤3A, 4.3V≤V
IN
≤16V
I
OUT
=10mA
10mA≤I
OUT
≤3A, 6.0V≤V
IN
≤16V
Min.
Typ.
Max.
Units
Conditions
Reference Voltage and Adjustable Pin - SPX29302
1.24
1.252
1.228
1.265
1.215
Reference Voltage
1.277
1.203
Adjust Pin Bias Current
40
80
120
V
•
V
REF
≤V
OUT
≤(V
IN
-1), 2.3V≤V
IN
≤16V
10mA≤I
L
≤I
FL
, T
J
<T
JMAX
•
nA
© 2016 Exar Corporation
2/10
Rev. 2.2.0
SPX29300/01/02
3A Low Dropout Voltage Regulator
Parameter
Adjust Pin Bias Current
Temperature Coefficient
Min.
Typ.
0.1
0.01
220
Max.
Units
nA/˚C
Conditions
Power Good Flag Output – SPX29301
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Enable Input – SPX29301/02
Input Logic Voltage Low (OFF)
Input Logic Voltage High (ON)
Enable Input Pin
Regulator Output Current in
Shutdown
2.4
100
600
750
1
2
500
0.8
V
•
•
•
•
•
•
V
IN
<10V
V
EN
=16V
V
EN
=0.8V
Note 9
40
25
1
2
300
400
µA
mV
mV
95
140
15
mV
mV
•
•
•
•
V
OH
=16V
Device set for 5V, V
IN
=4.5V, I
OL
=250µA
Device set for 5V, Note 8
Device set for 5V, Note 8
Device set for 5V, Note 8
60
75
µA
10
µA
Note 2: Full load current (I
FL
) is defined as 3.0A.
Note 3: Dropout voltage is defined (V
IN
-V
OUT
) when the output voltage drops to 99% of its nominal value.
Note 4: V
IN
=V
OUT
(nom)+1V. Use pulse-testing procedures to minimize temperature rise.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load
current to the ground current.
Note 6: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature
range
Note 7: Thermal regulation is defined as the change in output voltage at time T after a change in power dissipation is applied,
excluding load/line regulation effects. Specifications for a 200mA load pulse as V
IN
=20V (a 4W pulse) for t=10ms.
Note 8: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference
voltage measured 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain
= V
OUT
/V
REF
= (R1 + R2)/R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low
when the output drops by 95mVx 5V/ 1.240V = 383mV. Threshold remain constant as a percent of
V
OUT
as V
OUT
is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
Note 9: V
EN
≤ 0.8V and V
IN
≤ 16V, V
OUT
= 0.
© 2016 Exar Corporation
3/10
Rev. 2.2.0
SPX29300/01/02
3A Low Dropout Voltage Regulator
BLOCK DIAGRAM
Fig. 2: SPX29300/01/02 Block Diagram
PIN ASSIGNMENT
Fig. 3: SPX29300/01/02 Pin Assignment
© 2016 Exar Corporation
4/10
Rev. 2.2.0
SPX29300/01/02
3A Low Dropout Voltage Regulator
ORDERING INFORMATION
Part Number
SPX29300T-L-1-8/TR
SPX29300T-L-2-5/TR
SPX29300T-L-3-3
SPX29300T-L-3-3/TR
SPX29300T-L-5-0/TR
SPX29301T5-L-3-3/TR
SPX29301T5-L-5-0/TR
SPX29302T5-L
SPX29302T5-L/TR
Operating
Temperature Range
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
-40°C≤T
J
≤+125°C
Lead-Free
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Package
3-pin TO263
3-pin TO263
3-pin TO263
3-pin TO263
3-pin TO263
5-pin TO263
5-pin TO263
5-pin TO263
5-pin TO263
Packing Method
500/Tape & Reel
500/Tape & Reel
Bulk
500/Tape & Reel
500/Tape & Reel
500/Tape & Reel
500/Tape & Reel
Bulk
500/Tape & Reel
“YY” = Year – “WW” = Work Week – “L” = Lead Free Designator – “X” = Lot Number
Notes:
1. Refer to
http://www.exar.com/SPX29300
for most up-to-date Ordering Information.
2. Visit
http://www.exar.com
for additional information on Environmental Rating.
© 2016 Exar Corporation
5/10
Rev. 2.2.0
