SPX3819T [SIPEX]
500 mA, Low-Noise LDO Voltage Regulator; 500毫安，低噪声LDO稳压器
| 型号： | SPX3819T |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | 500 mA, Low-Noise LDO Voltage Regulator |
| 文件： | 总12页 (文件大小：138K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SPX3819
500mA, Low-Noise LDOVoltage Regulator
FEATURES
■ Low Noise: 40µV Possible
■ High Accuracy: 1%
■ Reverse Battery Protection
EN
1
2
ADJ/BYP
GND
NC
SPX3819 78
■ Low Dropout: 340mV at Full Load
■ Low Quiescent Current: 90µA
■ Zero Off-Mode Current
NC
8 Pin DFN
■ Fixed Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V,
VIN
6
3
4
3.1V, 3.3V, 5.0V
■ 5 Pin SOT-23, 8 Pin nSOIC and 8 pin 2X3 DFN
VOUT
5
NC
Packages.
APPLICATIONS
■ Battery Powered Systems
■ Cordless Phones
Now Available in Lead Free Packaging
■ Radio Control Systems
■ Portable/Palm Top/Notebook Computers
■ Portable Consumer Equipment
■ Portable Instrumentation
■ Bar Code Scanners
■ SMPS Post Regulators
DESCRIPTION
The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output. In addition,
thisdeviceoffersaverylowgroundcurrentof800µAat100mAoutput.TheSPX3819hasaninitialtolerance
of less than 1% max and a logic compatible ON/OFF switched input. When disabled power consumption
drop 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 voltages 1.2V, 1.5V, 1.8V,
2.5V, 3.0V, 3.1V, 3.3V, 5.0V or with an adjustable output. This device is offered in 8 pin nSOIC, 8 pin DFN
and 5-pin SOT-23 packages.
TYPICAL APPLICATION CIRCUIT
VIN
1
VOUT
5
+
2
SPX3819
GND
EN
+
3
4
BYP
(Opt.)
ENABLE may be tied directly to V
IN
TOP View
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Power Dissipation ...................................................... Internally Limited
Lead Temp. (Soldering, 5 Seconds) ........................................... 260°C
Operating Junction Temperature Range ................... -40°C to +125°C
Input Supply Voltage ........................................................ -20V to +20V
Enable Input Voltage ........................................................ -20V to +20V
RECOMMENDED OPERATIONG CONDITIONS
Input Voltage ................................................................... +2.5V to+16V
Operating Junction Temperature Range ................... -40°C to +125°C
Enable Input Voltage .............................................................. 0V to VIN
ELECTRICAL CHARACTERISTICS
TJ=25°C, VOUT + 1V, for 1.2V Option VIN=VOUT + 1.2V IL=100µA, CL=1µF, and VENABLE ≥ 2.4V. The
♦ denotes the
specifications which apply over full operating temperature range -40°C to +85°C, unless otherwise specified.
PARAMETER
MIN
TYP
MAX
UNITS
♦
♦
CONDITIONS
Output Voltage Tolerance
-1
-2
+1
+2
%
Output Voltage Temperature Coef.
Line Regulation
57
0.04
0.05
10
ppm/°C
%/V
%
0.1
0.4
VIN=VOUT + 1V to 16V
IL = 0.1mA to 500mA
IL = 100µA
Load Regulation
Dropout Voltage
(VIN-VO)(Note 2)
60
80
mV
♦
♦
♦
♦
♦
♦
♦
♦
♦
125
180
340
0.05
90
175
250
mV
mV
mV
µA
IL = 50mA
IL = 150mA
IL = 500mA
350
450
550
700
Quiescent Current (IGND
)
3
8
V
V
ENABLE ≤ 0.4V
ENABLE ≤ 0.25V
Ground Pin Current (IGND
)
150
190
µA
IL = 100µA
IL = 50mA
IL = 150mA
IL = 500mA
250
1.0
650
900
µA
2.0
2.5
mA
mA
6.5
25.0
30.0
Ripple Rejection (PSRR)
Current Limit (ILIMIT
70
dB
)
800
mA
VOUT = 0V
950
♦
Output Noise (eNO
)
300
40
µVRMS
µVRMS
IL=10mA, CL=1.0µF, CIN=1µF,
(10Hz-100kHz)
IL=10mA, CL=10µF, CBYP =1µF,
CIN =1µF, (10Hz-100kHz)
Input Voltage Level Logic Low (VIL)
Input Voltage Level Logic High (VIH
ENABLE Input Current
0.4
V
V
OFF
ON
)
2
0.01
3
2
20
µA
VIL ≤ 0.4V
IH ≥ 2.0V
V
Thermal Resistance (Note 1)
220
180
°C/W
°C/W
♦
♦
SOT-23-5 / Junction to Ambient
SO-8 / Junction to Ambient
NOTES
Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ(max) the junction to ambient thermal
resistance, and the ambient θJA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is
given: PD(max) = (TJ(max)-TA)/θJA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will
go into thermal shutdown. The θJA of the SPX3819 is 220°C/W mounted on a PC board.
Note 2: Not applicable to output voltage 2V or less.
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
160
150
140
130
120
110
100
3.3V Device
V
IN= 4.3V
CL = 1.0µF
90
80
70
60
3.3V Device
CL= 1.0µF
IL = 100µA
0
100
200
300
400
500
4
6
8
10
12
14
16
I
(mA)
V
IN
(V)
L
Ground Current vs Input Voltage
Ground Current vs Load Current
14.0
3.350
3.345
3.340
3.335
3.330
3.325
3.320
3.315
3.310
3.305
3.300
3.295
3.290
3.3V Device
V
= 4.3V
IN
L
12.0
10.0
8.0
C
= 1.0µF
6.0
3.3V Device
CL= 1.0µF
IL = 100µA
4.0
2.0
0.0
4
6
8
10
12
14
16
0
100
200
300
400
500
V
IN
(V)
I
(mA)
L
Output Voltage vs Input Voltage
Ground Current vs Load Current in Dropout
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
3.316
350
300
250
200
150
100
50
3.314
3.3V Device
3.3V Device
VIN= 4.3V
CL = 1.0µF
V
= 3.2V
IN
L
C
= 1.0µF
3.312
3.310
3.308
3.306
3.304
3.302
3.300
0
0
100
200
300
400
500
0
100
200
300
400
500
I
(mA)
I
L
(mA)
L
Output Voltage vs Load Current
Dropout Voltage vs Load Current
130
120
110
100
90
360
340
320
300
280
260
240
220
200
3.3V Device
V
= 4.3µF
3.3V Device
IN
C = 1.0µF
VIN = 4.3
L
CL= 1.0µF
L = 50mA
I
L
= 100µA
I
80
70
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Ground Current vs Temperature with 50mA Load
Ground Current vs Temperature with 100µA Load
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
14.0
8.0
7.5
7.0
6.5
6.0
3.3V Device
V = 4.3µF
IN
3.3V Device
C = 1.0µF
13.5
13.0
12.5
12.0
11.5
11.0
10.5
L
V
= 4.3µF
I = 500mA
L
IN
C = 1.0µF
L
I
L
= 500mA
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Ground Current vs Temperature in Dropout
Ground Current vs Temperature with 500mA Load
3.400
3.380
1.30
3.3V Device
C = 1.0µF
L
I
= 100µA
3.3V Device
L
1.25
1.20
1.15
1.10
1.05
1.00
VIN= 4.3µF
CL= 1.0µF
IL = 500mA
3.360
3.340
3.320
3.300
2.280
2.260
2.240
2.220
2.200
-40
-20
0
20
40
60
80
100
120
4
6
8
10
(V)
12
14
16
Temperature (°C)
V
IN
Output Voltage vs Temperature
ENABLE Voltage, ON threshold, vs Input Voltage
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
5
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
350
Cin = 1uFT,
Cout = 1uFT
Cin = 1uFT,
300
250
200
150
100
Cout = 2.2uFT
Cin = 1uFT
Cout = 10uFT
50
0
1
10
100
1000
10000 100000 1000000
Bypass Cap (pF)
Line Transient Response for 3.3V Device
Output Noise vs Bypass Capacitor Value IL = 10mA,
10Hz - 100kHz
Load Transient Response for 3.3V Device
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
6
APPLICATION INFORMATION
The SPX3819 requires an output capacitor for
device stability. Its value depends upon the
application circuit. In general, linear regulator
stability decreases with higher output currents.
In applications where the SPX3819 is putting
out less current, a lower output capacitance may
be sufficient. For example, a regulator sourcing
only 10mA, requires approximately half the
capacitance as the same regulator sourcing
150mA.
The SPX3819 start-up speed is inversely pro-
portional to the size of the BYP capacitor. Ap-
plications requiring a slow ramp-up of the out-
put voltage should use a larger CBYP. However,
if a rapid turn-on is necessary, the BYP capaci-
tor can be omitted.
The SPX3819’s internal reference is available
through the BYP pin.
Benchtestingisthebestmethodfordetermining
the proper type and value of the capacitor since
the high frequency characteristics of electro-
lytic capacitors vary widely, depending on type
and manufacturer. A high quality 2.2µF alumi-
num electrolytic capacitor works in most appli-
cation circuits, but the same stability often can
be obtained with a 1µF tantalum electrolytic.
Figure 1 represents a SPX3819 standard appli-
cation circuit. The EN (enable) pin is pulled
high (>2.0V) to enable the regulator.
To disable the regulator, EN < 0.4V.
The SPX3819 in Figure 2 illustrates a typical
adjustable output voltage configuration. Two
resistors (R1 and R2) set the output voltage. The
output voltage is calculated using the formula:
With the SPX3819 adjustable version, the mini-
mumvalueofoutputcapacitanceisafunctionof
the output voltage. The value decreases with
higher output voltages, since closed loop gain is
increased.
VOUT = 1.235V x [ 1 + R1/R2]
R2 must be > 10 kΩ and for best results, R2
shouldbebetween22kΩand47kΩ. Acapacitor
placed between Adj and ground will provide
improved noise performance.
Typical Applications Circuits
A 10nF capacitor on BYP pin will significantly
reduce output noise but it may be left uncon-
nected if the output noise is not a major concern.
VIN
1
VOUT
5
VOUT
VIN
1
5
+
+
R1
R2
2
2
SPX3819
SOT-23
SPX3819
GND
EN
+
GND
EN
+
3
4
ADJ
3
4
BYP
(Opt.)
BYP
(Opt.)
Hi-ON
Lo-OFF
ENABLE may be tied directly to V
IN
TOP View
TOP View
Figure 2. Typical Adjustable Output Voltage Configuration
Figure 1. Standard Application Circuit
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
7
PACKAGE: PIN DESCRIPTION
Pin #
nSOIC
Pin #
DFN
Pin #
SOT-3
Pin Name
Description
2
5-8
3
3
7
5
1
1
2
5
3
VIN
GND
VOUT
EN
Supply Input
Ground
Regulator Output
1
Enable(input). CMOS compatible
control input. Logic high = enable;
logic low or open = shutdown
4
-
8
4
-
ADJ/BYP Adjust(input). Feedback input.
Connect to resistive voltage-divider
network
4, 6
NC
No Connect
PACKAGE: PINOUTS
EN
1
2
ADJ/BYP
GND
NC
SPX3819 78
1
GND
GND
8
7
6
5
EN
SPX3819
NC
V
IN
2
3
4
8 Pin DFN
VIN
6
3
4
V
GND
GND
8 Pin nSOIC
OUT
VOUT
5
NC
ADJ/BYP
V
OUT
ADJ/BYP
5
4
SPX3819
5 Pin SOT-23
1
IN
2
GND
3
EN
V
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
8
PACKAGE: 8 PIN SOIC
D
e
E/2
E1
E
E1/2
SEE VIEW C
1
b
INDEX AREA
(D/2 X E1/2)
Ø1
A
TOP VIEW
Gauge Plane
L2
Ø
Ø1
Seating Plane
L
L1
VIEW C
A2
A
SEATING PLANE
A1
SIDE VIEW
b
WITH PLATING
DIMENSIONS
Minimum/Maximum
(mm)
8 Pin NSOIC
(JEDEC MS-012,
AA - VARIATION)
COMMON HEIGHT DIMENSION
SYMBOL
MIN NOM MAX
c
1.75
0.25
1.65
0.51
0.25
-
-
-
-
-
A
1.35
A1
A2
b
0.10
1.25
0.31
c
0.17
BASE METAL
D
E
E1
e
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
CONTACT AREA
L
-
0.40
1.27
L1
L2
1.04 REF
0.25 BSC
-
-
0º
5º
8º
15º
Ø
Ø1
PACKAGE:
8 PIN NSOIC
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
9
PACKAGE: 8 PIN DFN
Top View
Bottom View
D
D2
D/2
1
2
E/2
E
E2
K
L
b
e
Pin 1 identifier to be located within this shaded area.
Terminal #1 Index Area (D/2 * E/2)
2x3 8 Pin DFN
JEDEC mo-229C
(VCED-2) Variation
Dimensions in (mm)
Side View
MIN
0.80
0
Symbol
NOM MAX
0.90
0.02
0.20
1.00
0.05
-
A
A
A1
A1
A3
A3
b
-
0.18
0.25 0.30
2.00 BSC
D
D2
e
1.50
-
-
1.75
-
0.50
E
3.00 BSC
-
1.60
1.90
E2
0.20
0.30
-
K
L
-
0.50
0.40
2x3 8 Pin DFN
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
10
PACKAGE: 5 PIN SOT-23
D
e1
N
N/2
+1
H
E/2
E1/2
B
B
E
E1
SEE VIEW C
1
e
2
N/2
Ø1
b
Gauge Plane
L2
5 PIN SOT-23
JEDEC MO-178
(AA) Variation
Dimensions in (mm)
Seating Plane
4X Ø1
L
Ø
L1
MIN NOM MAX
VIEW C
A
-
-
1.45
0.15
0
-
A1
A2
0.90 1.15 1.30
A2
A
b
c
0.30
0.08
-
0.50
0.22
-
A1
SIDE VIEW
D
e
2.90 BSC
0.95 BSC
1.90 BSC
b
e1
E
WITH PLATING
2.80 BSC
1.60 BSC
0.45
E1
0.30
0.60
L
c
L1
L2
0.60 REF
0.25 BSC
4º
BASE METAL
Ø
0º
5º
8º
Ø1
10º
15º
5 PIN SOT-23
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
11
ORDERING INFORMATION
PART NUMBERS
TOP MARK
PACKAGE TYPE
SPX3819S-1.8........ .................................................3819S18YYWW............................................8 Pin nSOIC
SPX3819S-1.8/TR.....................................................3819S18YYWW......................... .. ..............8 Pin nSOIC
SPX3819S-2.5 ......... ...............................................3819S25YYWW ......................................... 8 Pin nSOIC
SPX3819S-2.5/TR ....................................................3819S25YYWW ......................................... 8 Pin nSOIC
SPX3819S-3.0........... ..............................................3819S30YYWW ......................................... 8 Pin nSOIC
SPX3819S-3.0/TR.....................................................3819S30YYWW ......................................... 8 Pin nSOIC
SPX3819S-3.3............. ............................................3819S33YYWW ......................................... 8 Pin nSOIC
SPX3819S-3.3/TR.....................................................3819S33YYWW ......................................... 8 Pin nSOIC
SPX3819S-5.0............... ....................................... ..3819S50YYWW ......................................... 8 Pin nSOIC
SPX3819S-5.0/TR.................................................. ..3819S50YYWW ......................................... 8 Pin nSOIC
SPX3819S....................... ........................................3819SYYWW.................................................8 Pin nSOIC
SPX3819S/TR................ ..........................................3819SYYWW.................................................8 Pin nSOIC
SPX3819R2-1.2.........................................................3819S12YWW.............................. .. ..............8 Pin DFN
SPX3819R2-1.2/TR..... ............................................3819S12YWW.............................. .. ..............8 Pin DFN
SPX3819M5...............................................................G1WW ..................................................... 5 Pin SOT-23
SPX3819M5/TR.........................................................G1WW ..................................................... 5 Pin SOT-23
SPX3819M5-1.2........................................................ TBD ........................................................ 5 Pin SOT-23
SPX3819M5-1.2/TR............................................. .... TBD ........................................................ 5 Pin SOT-23
SPX3819M5-1.5...........................................................TBD ....................................................... 5 Pin SOT-23
SPX3819M5-1.5/TR................................................ ....TBD ....................................................... 5 Pin SOT-23
SPX3819M5-1.8..................................................... ..G3WW ..................................................... 5 Pin SOT-23
SPX3819M5-1.8/TR...................................................G3WW ..................................................... 5 Pin SOT-23
SPX3819M5-2.5 ........................................................H3WW ..................................................... 5 Pin SOT-23
SPX3819M5-2.5/TR ..................................................H3WW ..................................................... 5 Pin SOT-23
SPX3819M5-3.0........................................................J3WW ..................................................
SPX3819M5-3.0/TR..................................................J3WW ..................................................
5 Pin SOT-23
5 Pin SOT-23
SPX3819M5-3.1........................................................K3WW ...................................................... 5 Pin SOT-23
SPX3819M5-3.1/TR..................................................K3WW ...................................................... 5 Pin SOT-23
SPX3819M5-3.3.........................................................L3WW...................................................... 5 Pin SOT-23
SPX3819M5-3.3/TR................. ..................................L3WW ..................................................... 5 Pin SOT-23
SPX3819M5-5.0.........................................................M3WW..................................................... 5 Pin SOT-23
SPX3819M5-5.0/TR...................................................M3WW ..................................................... 5 Pin SOT-23
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX3819M5-5.0/TR = standard; SPX3819M5-L-5.0/TR = lead free
/TR = Tape and Reel
Pack quantity is 2500 for SOT-23 or NSOIC and 3000 for DFN .
Sipex Corporation
Corporation
Headquarters and
Sales Office
233 South Hillview Drive
ANALOG EXCELLENCE
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of
the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of
others.
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
12
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