XRP29300/01/02
3A Low Dropout Voltage Regulator
May 2011
Rev. 2.1.0
GENERAL DESCRIPTION
The XRP29300/01/02 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 XRP29300 is offered in a 3-pin TO-263
package, the XRP29301 is offered in a 5-pin
TO-263 while XRP29302 is offered in a 5-pin
TO-263 and 5-pin TO-220 packages.
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
(XRP29301/02)
•
Power Good Flag
(XRP29301)
•
Lead Free 3-Pin TO-263, 5-pin TO-220
and TO-263 Packages
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP29300 and XRP29302 Application Diagrams
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
XRP29300/01/02
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-220-5 Junction to Ambient ....................... 29.3°C/W
TO-263-3 Junction to Ambient ....................... 31.4°C/W
TO-263-5 Junction to Ambient ....................... 31.2°C/W
TO-220-5, 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 - XRP29302
1.24
1.252
1.228
1.265
1.215
Reference Voltage
1.277
1.203
Adjust Pin Bias Current
Adjust Pin Bias Current
Temperature Coefficient
40
0.1
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
nA/˚C
© 2011 Exar Corporation
2/10
Rev. 2.1.0
XRP29300/01/02
3A Low Dropout Voltage Regulator
Parameter
Min.
Typ.
0.01
220
40
25
60
75
15
0.8
2.4
100
Enable Input Pin
Regulator Output Current in
Shutdown
600
750
1
2
500
95
140
Max.
1
2
300
400
Units
Conditions
Power Good Flag Output – XRP29301
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Enable Input – XRP29301/02
Input Logic Voltage Low (OFF)
Input Logic Voltage High (ON)
V
•
•
•
•
•
•
V
IN
<10V
V
EN
=16V
V
EN
=0.8V
Note 9
µA
mV
mV
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
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.
BLOCK DIAGRAM
Fig. 2: XRP29300/01/02 Block Diagram
© 2011 Exar Corporation
3/10
Rev. 2.1.0
XRP29300/01/02
3A Low Dropout Voltage Regulator
PIN ASSIGNMENT
Fig. 3: XRP29300/01/02 Pin Assignment
ORDERING INFORMATION
Part Number
XRP29300-18ETB3-L
XRP29300-18ETB3TR-L
XRP29300-25ETB3-L
XRP29300-25ETB3TR-L
XRP29300-33ETB3-L
XRP29300-33ETB3TR-L
XRP29300-50ETB3-L
XRP29300-50ETB3TR-L
XRP29301-33ETB5-L
XRP29301-33ETB5TR-L
XRP29301-50ETB5-L
XRP29301-50ETB5TR-L
XRP29302ET-L
XRP29302ETB-L
XRP29302ETBTR-L
Junction
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
Marking
29300-18
YYWW XXX
29300-25
YYWW XXX
29300-33
YYWW XXX
29300-500
YYWW XXX
29301-33
YYWW XXX
29300-50
YYWW XXX
XRP29302E
YYWW X
XRP29302E
YYWW X
Package
3-pin
TO263
3-pin
TO263
3-pin
TO263
3-pin
TO263
5-pin
TO263
5-pin
TO263
5-pin
TO220
5-pin
TO263
Packing
Quantity
Bulk
500/Tape & Reel
Bulk
500/Tape & Reel
Bulk
500/Tape & Reel
Bulk
500/Tape & Reel
Bulk
500/Tape & Reel
Bulk
500/Tape & Reel
Bulk
Bulk
500/Tape & Reel
Note 1
Note 2
1.8V
2.5V
3.3V
5.0V
3.3V
5.0V
Adjustable
Adjustable
Lead Free
Lead Free
Lead Free
Lead Free
Lead Free
Lead Free
Lead Free
Lead Free
“YY” = Year – “WW” = Work Week – “L” = Lead Free Designator – “X” = Lot Number when applicable.
© 2011 Exar Corporation
4/10
Rev. 2.1.0
XRP29300/01/02
3A Low Dropout Voltage Regulator
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at V
IN
= V
OUT
+ 1V, T
J
= T
A
= 25°C, unless otherwise specified.
Fig. 4: Dropout Voltage vs Load Current
Fig. 5: Startup
Fig. 6: Line Regulation
I
OUT
=10mA, V
OUT
=3.3V
Fig. 7: Load Regulation
V
OUT
=3.3V
© 2011 Exar Corporation
5/10
Rev. 2.1.0
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