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RS431 Series
Adjustable Precision Shunt Regulator
RS431 Series Pin Assignment
3 2 3-Lead Plastic SOT-23 Package Code: N Pin 1: Reference Pin 2: Cathode Pin 3: Anode
Description
The RS431 series are three-terminal adjustable regulators with guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications.
1
12
3
3-Lead Plastic TO-92 Package Code: A Pin 1: Reference Pin 2: Anode Pin 3: Cathode
Features
* Programmable Precise Output Voltage from 2.5V to 36V * High Stability under Capacitive Load * Low Temperature Deviation: 4.5mV Typical * Low Dynamic Output Resistance: 0.2 Typical * Sink Current Capacity from 1mA to 100 mA * Low Output Noise * Wide Operating Range of -40 to 125 oC * Low Equivalent Full-range Temperature Coefficient with 20PPM/ oC Typical
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified) Characteristics Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Symbol VKA IK IREF TO-92 --Operating Temperature Range (Max.) Storage Temperature Range Topr Tstg -40~+125 * -65~+150 Value 40 -100~+150 0.05~+10 SOT-23 Power Dissipation PD 370 770 --o o
Unit V mA mA
mW
C C
Operating Conditions
Characteristics Cathode Voltage Cathode Current Range (Continuous) Operating Ambient Temperature Range Symbol VKA IK Min. VREF 1 -40 Max. 36 100 125 Unit V mA
o
C
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Functional Block Diagram & Symbol
Functional Block Diagram Symbol
Cathode
Reference
Anode
Test Circuits
Fig 1. VK=VREF IN IREF IK VREF R2 VREF II VK Fig 2. VK>VREF IN R1 II VK IREF IK IOFF Fig 3. Off-State Current IN VK
Note: VK=VREF (1+R1/R2)+IREFxR1
Electrical Characteristics (TA=25oC unless otherwise specified)
Characteristics Reference Input Voltage (Fig1) 0.4% 0.8% Symbol VREF VREF(dev) VREF / VK IREF IREF(dev) IK(min) IK(off) ZK Test Conditions VK=VREF, IK=10mA VK=VREF, IK=10mA TminTaTmax (-40~+125) IK=10mA, VK=10V to VREF IK=10mA, VK=36V to 10V IK=10mA, R1=10k, R2= IK=10mA, R1=10k, R2=, Ta=-40~+125 oC VK=VREF VK=36V, VREF=0 VK=VREF, f1kHz IK=1 to 100mA Min 2.49 2.48 Typ 2.50 2.50 4.5 1.0 0.5 0.7 0.4 0.4 0.05 0.15 Max 2.51 2.52 16 2.7 2.0 4 1.2 1.0 1.0 0.5 Unit V mV mV/V mV/V uA uA mA uA
Deviation of Reference Input Voltage Over-Temperature (Fig1) Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage (Fig2) Reference Input Current (Fig2) Deviation of Reference Input Current Over Full Temperature Range (Fig2) Minimum Cathode Current for Regulation (Fig1) Off-State Cathode Current (Fig3) Dynamic Output Impedance (Fig1)
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Typical Performance Characteristics
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Typical Performance Characteristics (Continued)
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Typical Performance Characteristics (Continued)
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SOT-23 Dimension
Marking: DIM A B C D G H J K L S V Min. 2.80 1.20 0.89 0.30 1.70 0.013 0.085 0.32 0.85 2.10 0.25 Max. 3.04 1.60 1.30 0.50 2.30 0.10 0.177 0.67 1.15 2.75 0.65
A
L
431
BS
Pb Free Mark
Pb-Free: " " (Note) Normal: None
3
1
2
Note: Pb-free product can distinguish by the green label or the extra description on the right side of the label. Pin Style: 1.Reference 2.Cathode 3.Anode Material: * Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) * Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
V
G
*: Typical, Unit: mm
C D H K J
3-Lead SOT-23 Plastic Surface Mounted Package Package Code: N
TO-92 Dimension
2
Marking:
Pb Free Mark
Pb-Free: " . " (Note) Normal: None
A B
1 2 3
RS 431
A
Date Code
Control Code
3
Note: Green label is used for pb-free packing
C
D
Pin Style: 1.Reference 2.Anode 3.Cathode Material: * Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) * Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
DIM A B C D E F G H I 1 2 3
Min. 4.33 4.33 12.70 0.36 3.36 0.36 -
Max. 4.83 4.83 0.56 *1.27 3.76 0.56 *2.54 *1.27 *5 *2 *2
H I E F
G
*: Typical, Unit: mm
1
3-Lead TO-92 Plastic Package Package Code: A
Ordering Information
Package SOT-23 TO-92 VREF: 2.50.8% RS431BN RS431BA VREF: 2.50.4% RS431AN RS431AA
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Soldering Methods for Orister's Products
1. Storage environment: Temperature=10oC~35oC Humidity=65%15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile
tP TP Ramp-up TL Tsmax Temperature tL Critical Zone TL to TP
Tsmin tS Preheat
Ramp-down
25
t 25oC to Peak Time
Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices.
Sn-Pb Eutectic Assembly <3 C/sec 100oC 150oC 60~120 sec <3oC/sec 183oC 60~150 sec 240 C +0/-5 C 10~30 sec <6oC/sec <6 minutes
o o o
Pb-Free Assembly <3oC/sec 150oC 200oC 60~180 sec <3oC/sec 217oC 60~150 sec 260oC +0/-5oC 20~40 sec <6oC/sec <8 minutes
Peak temperature 245 C 5 C 260 C +0/-5 C
o o o o
Dipping time 5sec 1sec 5sec 1sec
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Important Notice:
* All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of Orister Corporation. * Orister Corporation reserves the right to make changes to its products without notice. * Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems. * Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
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