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AX432 Series
Adjustable Shunt Regulator
AX432 Series Pin Assignment
3-Lead Plastic SOT-23 Package Code: N Pin 1: Reference Pin 2: Cathode Pin 3: Anode 3-Lead Plastic SOT-89 Package Code: M Pin 1: Reference Pin 2: Anode Pin 3: Cathode 3-Lead Plastic TO-92 Package Code: A Pin 1: Reference Pin 2: Anode Pin 3: Cathode
3 2
Description
The AX432 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 1.24 or 1.25 volts) and 30 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
1
2
3
Features
* Programmable output voltage * Temperature coefficient is 50ppm/oC typical * Temperature compensated for operation over full temperature range * Low output noise voltage * Fast turn on response
1
2 12
3 3
Ordering Information
Package SOT-23 SOT-89 TO-92 VREF 1.24V2% AX432AN AX432AM AX432AA VREF 1.24V1% AX432BN AX432BM AX432BA VREF 1.24V0.5% AX432CN AX432CM AX432CA VREF 1.25V2% AX432DN AX432DM AX432DA VREF 1.25V1% AX432EN AX432EM AX432EA VREF 1.25V0.5% AX432FN AX432FM AX432FA
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified) Characteristics Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Operating Temperature Range Junction Temperature Storage Temperature Range Symbol VKA IK IREF PD Topr TJ Tstg Value 30 50 0.05~+10 SOT-23 280 SOT-89 770 TO-92 770 0~+70 150 -65~+150 Unit V mA mA mW C C o C
o o
Operating Conditions
Characteristics Cathode Voltage Cathode Current Range (Continuous) Symbol VKA IK Min. VREF 1 Typ. 10 Max. 30 Unit V mA
AVANTICS - AX432 Series
Specification No.: 050308-FE0002
Page No. : 2/7
Functional Block Diagram & Symbol
Functional Block Diagram Symbol
Cathode
Reference VREF
+
-
Cathode
Reference
Anode
Anode
Test Circuits
Fig 1. VK=VREF VIN IREF IK VREF R2 VREF II VK Fig 2. VK>VREF VIN R1 II VK IREF IK IOFF Fig 3. Off-State Current VIN VK
Note: VK=VREF(1+R1/R2)+IREFxR1
Electrical Characteristics (TA=25oC unless otherwise specified)
Characteristics AX432AN/AM/AA AX432BN/BM/BA AX432CA/CM/CA Reference Input (Fig1) Voltage AX432DN/DM/DA AX432EN/EM/EA AX432FN/FM/FA Deviation of Reference Input Voltage OverTemperature (Fig1) Symbol Test Conditions Min 1.215 1.228 1.234 1.225 1.238 1.244 Typ 1.24 1.24 1.24 1.25 1.25 1.25 4 -1.4 -1 1 0.4 0.4 0.1 Max 1.265 1.252 1.246 1.275 1.262 1.256 17 -2.7 -2 4 1.2 1 1 Unit
VREF
VK=VREF, IK=10mA
V
VREF(dev)
Ratio of Change in Reference Input Voltage to VREF / the Change in Cathode Voltage (Fig2) VK 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) IREF IREF(dev) IK(min) IK(off)
VK=VREF, IK=10mA TminTaTmax IK=10mA, VK=10V to VREF IK=10mA, VK=30V to 10V IK=10mA, R1=10k, R2= IK=10mA, R1=10k, R2=, Ta=Full Range VK=VREF VK=30V, VREF=0
mV mV/V mV/V uA uA mA uA
AVANTICS - AX432 Series
Specification No.: 050308-FE0002
Page No. : 3/7
Characteristics Curve
Cathode Current & Cathode Voltage
20 15
Change in Reference Input Voltage & Cathode Voltage
0 Change in Reference Input Voltage (mV) -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 0 10 20 Cathode Voltage (V) 30 40
10 Cathode Current (mA) 5 0 -5 -10 -15 -20 -25 -1 -0.5 0 0.5 Cathode Voltage (V) 1 1.5 VK=VREF, Ta=25 C Test Circuit (Fig1)
o
Reference Input Voltage & Temperature
1.248 1.246 Reference Input Voltage (V) 1.244 1.242 1.24 1.238 1.236 1.234 -20 0 20 40 60 o Temperature ( C) 80 100 120 VK=VREF, IK=10mA Test Circuit (Fig1) 300 200 100 0 -100 -200 -300 -400 -1
Cathode Current & Cathode Voltage
Cathode Current (uA)
VK=VREF, Ta=25 C Test Circuit (Fig1)
o
-0.5
0 0.5 Cathode Voltage (V)
1
1.5
Small Signal Voltage Amplification & Frequency
60 50 Voltage Amplification (dB) 40 30
Vout
20 10 0 -10 100
+ 10uF
6.8K
Ik
180
4.3K
5V GND
1000
10000 100000 Frequency (Hz)
1000000
10000000
AVANTICS - AX432 Series
Specification No.: 050308-FE0002
Page No. : 4/7
Typical Application
Fig 4. Shunt Regulator Fig 5. High Current Shunt Regulator
Vcc R1
Vout
Vcc R1
Vout
R2
R2
Vout=(1+R1/R2)VREF
Vout=(1+R1/R2)VREF
Fig 6. Output Control of a Three-Terminal Fixed Regulator
AX7805
Fig 7. Series Pass Regulator
Vcc
IN
OUT COMMON
Vout R1
Vcc R1
Vout
R2
R2
Vout=(1+R1/R2)VREF; Vout(min)=VREF+5V
Vout=(1+R1/R2)VREF; Vout(min)=VREF+VBE
Fig 8. Current Limiter or Current Source
Fig 9. Constant Current Sink
Vcc
Vcc RCL Iout
Isink
Rs
Iout=VREF/RCL
AVANTICS - AX432 Series
Isink=VREF/RS
Specification No.: 050308-FE0002
Page No. : 5/7
SOT-89 Dimension
C H
Marking:
Date Code AX4 3 2 Control Code Pb Free Mark
Pb-Free: " . " (Note) Normal: None
B
D 1 E G A 2 3 I
Note: Green label is used for pb-free packing 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
F
J
DIM A B C D E F G H I
Min. 4.40 4.05 1.50 2.40 0.36 *1.50 *3.00 1.40 0.35
Max. 4.60 4.25 1.70 2.60 0.51 1.60 0.41
*: Typical, Unit: mm
3-Lead SOT-89 Plastic Surface Mounted Package AVANTICS Package Code: M
TO-92 Dimension
A B
1 2 3
2
Marking:
Pb Free Mark
Pb-Free: " . " (Note) Normal: None
AX 432
A
3
Date Code
Control Code
C
Note: Green label is used for pb-free packing
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 AVANTICS Package Code: A
AVANTICS - AX432 Series
Specification No.: 050308-FE0002
Page No. : 6/7
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
432
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 AVANTICS Package Code: N
Important Notice:
* All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of AVANTIC. * AVANTICS reserves the right to make changes to its products without notice. * AVANTICS semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. * AVANTICS assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office:
* AVANTICS Microelectronics Corp: No. 255, Cai Lun Rd. Zhangjiang Technology Industrial Park Pudong, Shanghai, China Tel: 86-021-58955599 Fax: 86-021-58558038
AVANTICS - AX432 Series
Specification No.: 050308-FE0002
Page No. : 7/7
Soldering Methods for AVANTICS'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
o
Pb-Free Assembly <3oC/sec
100oC 150oC 60~120 sec
150oC 200oC 60~180 sec
<3oC/sec
<3oC/sec
183oC 60~150 sec 240 C +0/-5 C 10~30 sec <6oC/sec <6 minutes
o o
217oC 60~150 sec 260oC +0/-5oC 20~40 sec <6oC/sec <8 minutes
Peak temperature 245oC 5oC 260 C +0/-5 C
o o
Dipping time 5sec 1sec 5sec 1sec
AVANTICS - AX432 Series
Specification No.: 050308-FE0002

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