May 2014
Rev. 2.0.2
Exar Corporation
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
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TYPICAL APPLICATION DIAGRAM
Fig. 1: SPX3819 Application Circuit
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 ..................................................... θJA (SOT23-5) ...............................................191°C/W θJA (NSOIC-8) ............................................ 128.4°C/W θJA (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 θJA , 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 )/θJA , 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
Min. Typ. Max. Units Conditions
Output Voltage Tolerance -1 +1 %
PPPD298-2 +2 • Output Voltage Temperature Coefficient
57 ppm/°C
Line Regulation 0.04 0.1 %/V
V IN = V OUT +1 to 16V and V EN ≤ 6V 0.2 • V IN = V EN = V OUT +1 ≤ 8V
0.2 V IN = V EN = V OUT +1 ≤16V T A = 25°C to 85°C Load Regulation
0.05 0.4 % I L = 0.1mA to 500mA Dropout Voltage (V IN -V OUT ) 2
10 60 mV
I L = 100µA 80 • 125 175 I L = 50mA 250 • 180 350 I L = 150mA 450 • 340 550 I L = 500mA 700 • Quiescent Current (I GND ) 0.05 3 µA
V ENABLE ≤ 0.4V 8 • V ENABLE = 0.25V Ground Pin Current (I GND )
90 150 µA
I L = 100µA 190 • 250 650 I L = 50mA 900 • 1.0 2.0 mA I L = 150mA 2.5 • 6.5 25.0 I L = 500mA 30.0 • Ripple Rejection (PSRR) 70 dB
Parameter
Min. Typ. Max. Units
Conditions
Current Limit (I LIMIT )
800 mA
V OUT =0V 950 • Output Noise (e NO )
300 µV RMS I L = 10mA, C L = 1.0µF, C IN = 1µF, (10Hz – 100kHz)
40 µV RMS I L = 10mA, C L = 1.0µF, C BYP = 1µF, C IN = 1µF, (10Hz – 100kHz) Input Voltage Level Logic Low (V IL )
0.4 V OFF Input Voltage Level Logic High (V IH )
2 V ON
ENABLE Input Current
0.01 2 µA
VIL ≤ 0.4V VIH ≥ 2.0V
3
20
Note 2: Not applicable to output voltage 2V or less.
PIN ASSIGNMENT
Fig. 2: SPX3819 Pin Assignment
PIN DESCRIPTION
Name Pin #
nSOIC
Pin # DFN Pin # SOT-23 Description
VIN 2 3 1 Supply Input GND 5, 6, 7, 8
7 2 Ground
VOUT 3 5 5 Regulator Output
EN 1 1 3 Enable(input). CMOS compatible control input. Logic high – enable; logic low or open = shutdown
ADJ/BYP 4 8 4 Adjust(input). Feedback input. Connect to resistive voltage-divider network NC
-
2, 4, 6
-
No Connect
ORDERING INFORMATION
Part Number Temperature
Range Marking Package Packing Quantity Note 1 Note 2
SPX3819M5-L -40°C≤T J ≤+125°C G1WW SOT-23-5 Bulk
Halogen free SPX3819M5-L/TR 2.5K/Tape & Reel
SPX3819M5-L-1-2 -40°C≤T J ≤+125°C A4WW SOT-23-5 Bulk
国内域名Halogen free SPX3819M5-L-1-2/TR 2.5K/Tape & Reel
SPX3819M5-L-1-5 -40°C≤T J ≤+125°C W3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-1-5/TR 2.5K/Tape & Reel
SPX3819M5-L-1-8 -40°C≤T J ≤+125°C G3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-1-8/TR 2.5K/Tape & Reel
SPX3819M5-L-2-5 -40°C≤T J ≤+125°C H3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-2-5/TR 2.5K/Tape & Reel
SPX3819M5-L-3-0 -40°C≤T J ≤+125°C J3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-3-0/TR 2.5K/Tape & Reel
SPX3819M5-L-3-3 -40°C≤T J ≤+125°C L3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-3-3/TR 2.5K/Tape & Reel
SPX3819M5-L-5-0 -40°C≤T J ≤+125°C M3WW SOT-23-5 Bulk
Halogen free SPX3819M5-L-5-0/TR 2.5K/Tape & Reel
SPX3819R2-L -40°C≤T J ≤+125°C
L0L YWW XX DFN-8
Bulk
Halogen free
SPX3819R2-L/TR 3.0K/Tape & Reel
SPX3819R2-L-1-2 -40°C≤T J ≤+125°C M0L YWW XX DFN-8 Bulk
Halogen free
SPX3819R2-L-1-2/TR 3.0K/Tape & Reel
SPX3819R2-L-1-8 -40°C≤T J ≤+125°C N0L YWW XX DFN-8
Bulk
Halogen free
SPX3819R2-L-1-8/TR 3.0K/Tape & Reel
SPX3819S-L -40°C≤T J ≤+125°C SPX3819 YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L/TR 2.5K/Tape & Reel
SPX3819S-L-1-2 -40°C≤T J ≤+125°C SPX3819 12YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L-1-2/TR 2.5K/Tape & Reel
SPX3819S-L-1-5 -40°C≤T J ≤+125°C SPX3819 15YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L-1-5/TR 2.5K/Tape & Reel
科学学与
科学技术管理SPX3819S-L-1-8 -40°C≤T J ≤+125°C SPX3819 18YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L-1-8/TR 2.5K/Tape & Reel
SPX3819S-L-2-5 -40°C≤T J ≤+125°C SPX3819 25YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L-2-5/TR 2.5K/Tape & Reel
SPX3819S-L-3-3 -40°C≤T J ≤+125°C SPX3819 33YYWWL XXX NSOIC-8 Bulk
Halogen free
SPX3819S-L-3-3/TR 2.5K/Tape & Reel
波士顿矩阵法SPX3819S-L-5-0 -40°C≤T J ≤+125°C SPX3819 50YYWWL XXX
NSOIC-8 Bulk
Halogen free
SPX3819S-L-5-0/TR
2.5K/Tape & Reel
“YY” = Year – “WW” = Work Week – “X” = Lot Number; when applicable.
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 3: Ground Current vs Load Current
Fig. 4: Ground Current vs Input Voltage
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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
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