500mA Low-Noise LDO Voltage Regulator
500mA Low-Noise LDO Voltage Regulator
August 2016
Rev. 2.0.3
GENERAL DESCRIPTION
The SPX3819 is a positive voltage regulator
with a low dropout voltage and low noise
output. In addition, this device offers a very low
ground current of 800μA at 100mA output. The
SPX3819 has an initial tolerance of less than
1% max and a logic compatible ON/OFF
switched
input.
When
disabled,
power
consumption drops to nearly zero. Other key
features include reverse battery protection,
current limit, and thermal shutdown. The
SPX3819 includes a reference bypass pin for
optimal low noise output performance. With its
very low output temperature coefficient, this
device also makes a superior low power voltage
reference.
The SPX3819 is an excellent choice for use in
battery-powered applications such as cordless
telephones, radio control systems, and portable
computers. It is available in several fixed
output voltage options or with an adjustable
output voltage.
This device is offered in 8 pin NSOIC, 8 pin DFN
and 5-pin SOT-23 packages.
APPLICATIONS
•
Portable Consumer Equipment
•
Portable Instrumentation
•
Industrial Equipment
•
SMPS Post Regulators
FEATURES
•
Low Noise: 40μV Possible
•
High Accuracy: 1%
•
Reverse Battery Protection
•
Low Dropout: 340mV at Full Load
•
Low Quiescent Current: 90μA
•
Zero Off-Mode Current
•
Fixed & Adjustable Output Voltages:
−
1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V & 5.0V
Fixed Output Voltages
−
≥1.235V Adjustable Output Voltages
•
Available in RoHS Compliant, Lead Free
Packages:
−
5-pin SOT-23, 8-pin SOIC and 8-pin DFN
TYPICAL APPLICATION DIAGRAM
Fig. 1: SPX3819 Application Circuit
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
SPX3819
500mA Low-Noise LDO 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.
V
IN
, EN ..................................................... -20V to +20V
Storage Temperature .............................. -65°C to 150°C
Junction Temperature .......................................... 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 5 sec) ..................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
OPERATING RATINGS
Input Voltage Range V
IN
................................ 2.5V to 16V
Enable Pin EN ............................................... 0.0V to V
IN
Junction Temperature Range ................. -40°C to +125°C
Thermal Resistance
1
.....................................................
θ
JA
(SOT23-5)...............................................191°C/W
θ
JA
(NSOIC-8)............................................ 128.4°C/W
θ
JA
(DFN-8) ................................................... 59°C/W
Note 1: The maximum allowable power dissipation is a
function of maximum operating junction temperature,
T
J(max)
the junction to ambient thermal resistance, and the
ambient θ
JA
, and the ambient temperature T
A
. The
maximum allowable power dissipation at any ambient
temperature is given: P
D(max)
= (T
J(max)
-T
A
)/θ
JA
, exceeding
the maximum allowable power limit will result in excessive
die temperature; thus, the regulator will go into thermal
shutdown
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T
J
= 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 (V
IN
= V
OUT
+ 1.2V for 1.2V option), I
L
= 100µA, C
L
=
1µF, V
EN
≥ 2.5V, T
A
= T
J
= 25°C.
Parameter
Output Voltage Tolerance
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
0.05
10
125
Dropout Voltage (V
IN
-V
OUT
)
2
Min.
-1
-2
Typ.
Max.
+1
+2
Units
%
ppm/°C
•
Conditions
57
0.04
0.1
0.2
0.2
0.4
60
80
175
250
350
450
550
700
3
8
150
190
650
900
2.0
2.5
25.0
30.0
%/V
%
•
V
IN
= V
OUT
+1 to 16V and V
EN
≤ 6V
V
IN
= V
EN
= V
OUT
+1 ≤ 8V
V
IN
= V
EN
= V
OUT
+1 ≤16V
T
A
= 25°C to 85°C
I
L
= 0.1mA to 500mA
I
L
= 100µA
I
L
= 50mA
I
L
= 150mA
I
L
= 500mA
V
ENABLE
≤ 0.4V
V
ENABLE
= 0.25V
I
L
= 100µA
I
L
= 50mA
I
L
= 150mA
I
L
= 500mA
•
mV
•
•
•
µA
•
•
•
mA
dB
•
•
180
340
Quiescent Current (I
GND
)
0.05
90
250
µA
Ground Pin Current (I
GND
)
1.0
6.5
Ripple Rejection (PSRR)
70
© 2013-2016 Exar Corporation
2/12
Rev. 2.0.3
SPX3819
500mA Low-Noise LDO Voltage Regulator
Parameter
Current Limit (I
LIMIT
)
Min.
Typ.
800
950
300
Output Noise (e
NO
)
40
Input Voltage Level Logic Low
(V
IL
)
Input Voltage Level Logic High
(V
IH
)
ENABLE Input Current
2
0.01
3
2
20
0.4
µV
RMS
V
V
µA
Max.
Units
mA
µV
RMS
•
V
OUT
=0V
I
L
= 10mA, C
L
= 1.0µF, C
IN
= 1µF,
(10Hz – 100kHz)
I
L
= 10mA, C
L
= 1.0µF, C
BYP
= 1µF,
C
IN
= 1µF, (10Hz – 100kHz)
OFF
ON
VIL ≤ 0.4V
VIH ≥ 2.0V
Conditions
Note 2: Not applicable to output voltage 2V or less.
PIN ASSIGNMENT
Fig. 2: SPX3819 Pin Assignment
PIN DESCRIPTION
Name
VIN
GND
VOUT
EN
ADJ/BYP
NC
Pin #
Pin #
DFN
3
7
5
1
8
2, 4, 6
Pin #
SOT-23
1
2
5
3
4
-
Supply Input
Ground
Regulator Output
Enable(input). CMOS compatible control input. Logic high – enable;
logic low or open = shutdown
Adjust(input). Feedback input. Connect to resistive voltage-divider
network
No Connect
nSOIC
2
5, 6, 7, 8
3
1
4
-
Description
© 2013-2016 Exar Corporation
3/12
Rev. 2.0.3
SPX3819
500mA Low-Noise LDO Voltage Regulator
ORDERING INFORMATION
Part Number
SPX3819M5-L
SPX3819M5-L/TR
SPX3819M5-L-1-2
SPX3819M5-L-1-2/TR
SPX3819M5-L-1-5
SPX3819M5-L-1-5/TR
SPX3819M5-L-1-8
SPX3819M5-L-1-8/TR
SPX3819M5-L-2-5
SPX3819M5-L-2-5/TR
SPX3819M5-L-3-0
SPX3819M5-L-3-0/TR
SPX3819M5-L-3-3
SPX3819M5-L-3-3/TR
SPX3819M5-L-5-0
SPX3819M5-L-5-0/TR
SPX3819R2-L
SPX3819R2-L/TR
SPX3819R2-L-1-2
SPX3819R2-L-1-2/TR
SPX3819R2-L-1-8
SPX3819R2-L-1-8/TR
SPX3819S-L
SPX3819S-L/TR
SPX3819S-L-1-2
SPX3819S-L-1-2/TR
SPX3819S-L-1-5
SPX3819S-L-1-5/TR
SPX3819S-L-1-8
SPX3819S-L-1-8/TR
SPX3819S-L-2-5
SPX3819S-L-2-5/TR
SPX3819S-L-3-3
SPX3819S-L-3-3/TR
SPX3819S-L-5-0
SPX3819S-L-5-0/TR
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
-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
Marking
G1WW
A4WW
W3WW
G3WW
H3WW
J3WW
L3WW
M3WW
L0L
YWW
XX
M0L
YWW
XX
N0L
YWW
XX
SPX3819
YYWWL
XXX
SPX3819
12YYWWL
XXX
SPX3819
15YYWWL
XXX
SPX3819
18YYWWL
XXX
SPX3819
25YYWWL
XXX
SPX3819
33YYWWL
XXX
SPX3819
50YYWWL
XXX
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
DFN-8
DFN-8
DFN-8
NSOIC-8
NSOIC-8
NSOIC-8
NSOIC-8
NSOIC-8
NSOIC-8
NSOIC-8
Packaging
Method
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Bulk
Tape & Reel
Note 1
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Halogen free
Note 2
Refer to
www.exar.com/SPX3819
for most up-to-date Ordering Information
© 2013-2016 Exar Corporation
4/12
Rev. 2.0.3
SPX3819
500mA Low-Noise LDO Voltage Regulator
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 3: Ground Current vs Load Current
Fig. 4: Ground Current vs Input Voltage
Fig. 5 Ground Current vs Load Current in Dropout
Fig. 6 Output Voltage vs Input Voltage
Fig. 7 Dropout Voltage vs Load Current
Fig. 8 Output Voltage vs Load Current
© 2013-2016 Exar Corporation
5/12
Rev. 2.0.3
