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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Features
* Precision reference voltage AP432 : 1.24V 1% AP432A : 1.24V 0.5% Sink current capability: 200mA Minimum cathode current for regulation: 150A o Equivalent full-range temp coefficient: 30 ppm/ C Fast turn-on response Low dynamic output impedance: 0.2 Programmable output voltage to 20V Low output noise Packages: SOT23, SOT23R, SOT25, SC59 (W package code), SC59 (R package code), SOP-8L and TO92-3L SOT23, SOT23R, SOP-8L and SC59: Available in "Green" Molding Compound (No Br, Sb) (Note 1) Lead Free Finish/ RoHS Compliant for Lead Free and "Green" Products (Note 2)
General Description
The AP432/432A are 3-terminal adjustable precision shunt regulators with guaranteed stable temperature over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 1.24\/ (VREF) up to 20V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.2. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for Zener diodes in many applications. The precise +/- 1% reference voltage tolerance of the AP432/432A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it.
* * * * * * * * * *
Ordering Information
A P 4 3 2X X X X
Reference Voltage Tolerance: Blank : +/- 1% A : +/- 0.5%
Package Blank : V : SA : : W : R Q : SR : SOP-8L TO92-3L SOT23 SC59 SC59 SOT25 SOT23R
Lead-Free L : Lead Free G : Green (Note 1)
Packing -B : Bulk -7/-13 : Taping -A : Ammo Box (Note 3)
Note:
1. SOT23, SOT23R are "Green" products only. 2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device (Note 4)
AP432(A)SA AP432(A)SR
Lead-free
7" Tape and Reel 13" Tape and Reel Ammo Box Package Packaging Part Number Part Number Part Number Code (Note 5) Quantity Quantity Quantity Suffix Suffix Suffix
SA SR Q W R SOT23 SOT23R SOT25 SC59 SC59 SOP-8L V TO92-3L 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel NA NA -7 -7 -7 -7 -7 NA NA NA NA NA NA NA 2500/Tape & Reel NA NA NA NA NA NA -13 NA NA NA NA NA NA NA 2000/Box NA NA NA NA NA NA -A
AP432(A)Q AP432(A)W AP432(A)R AP432(A) AP432(A)V
Lead-free
Notes:
3. Ammo Box is for TO92-3 Spread Lead. 4. Suffix "A" denotes AP432A device. 5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
AP432/AP432A Rev. 6
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MARCH 2007
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Pin Assignment
Package
Pin Configuration (Top View) NC 1 2 4 CATHODE 3 REF
Package
Pin Configuration (Top View) CATHODE
1 2 3 4 8 7 6 5
REF ANODE ANODE NC
5
ANODE SOP-8L
SOT25
NC
ANODE ANODE NC
SC-59 ( Package Code-W)
3 ANODE 1 2
REF SOT23 CATHODE ANODE 1
3
REF
2
CATHODE
3 SC-59 ( Package Code-R) 3 ANODE 1 2 REF CATHODE SOT23R ANODE 1 2
CATHODE
REF
3 Cathode 2 Anode 1 REF
AP432/AP432A Rev. 6
+ +
TO92-3L
+
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Application Circuit
VIN
V OUT
+
C in A P 432
R1
+
C out
R2
V O U T = (1+ R 1/R 2)VREF P recision R egulator
Block Diagram
REF (R) + Cathode (C) Anode (A)
Cathode (C) Anode (A)
3 of 12 MARCH 2007
VREF
Symbol
REF (R)
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Absolute Maximum Ratings
Symbol Vcv ICC IREF TOP TST Parameter Cathode Voltage Continuous Cathode Current Reference Input Current Operating Temperature Storage Temperature SOT23(R) SOT25 Power Dissipation SC59 (Notes 6, 7) SOP-8L TO92-3L Rating +20 -10 to +250 10 -20 to +85 -65 to +150 250 250 400 600 780 Unit V mA mA o C o C mW mW mW mW mW
PD
Note: 6. TJ, max =150C 7. Ratings apply to ambient temperature at 25C
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Electrical Characteristics
Parameter Reference Voltage Deviation of Reference Input Voltage over Temperature (Note 8) Ratio of the Change in Reference Voltage to the Change in Cathode Voltage Reference Input Current Deviation of Reference Input Current over Temperature Minimum Cathode Current for Regulation Off-state Current Dynamic Output Impedance (Note 9)
( TA = 25oC, V+ = +5.0V, unless otherwise stated )
Test conditions AP432 VKA = Vref, I KA = 10mA (Fig.1) AP432A VKA = VREF , IKA = 10mA , Ta = full range (Fig.1) IKA = 10mA (Fig.2) VKA = 20 ~VREF
Symbol VREF VREF
Min. 1.227 1.233
Typ. 1.24 3.0 -1.4 1.4 0.4 0.15 0.1 0.2
Max. 1.252 1.246 20 -2.0 3.5 1.2 0.3 1.0 0.5
Unit V mV mV/V A A mA A
VREF V
KA
R1 = 10K,R2 = IKA= 10mA (Fig.2) R1 = 10K,R2 = IKA = 10mA Ta = Full range (Fig.2) VKA = VREF (Fig.1) VKA = 20V , VREF = 0V (Fig.3) V KA = VREF Frequency 1KHz (Fig.1)
IREF IREF IKA(min) IKA(off)
Z KA
VMAX VDEV = VMAX - VMIN VMIN
TI
Note:
Temperature
T2
8. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full temperature range. The average temperature coefficient of the reference input voltage VREF is defined as:
VREF
Where:
VDEV ) 10 6 VREF (25C) .............................................. ( ppm ) = C T2 - T1 (
T2 - T1 = full temperature change. VREF can be positive or negative depending on whether the slope is positive or negative. Note: 9. The dynamic output impedance, RZ, is defined as:
Z KA =
V KA IKA
When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall circuit, is defined as:
Z KA =
'
v Z KA i
(1 +
R1 ) R2
AP432/AP432A Rev. 6
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MARCH 2007
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Test Circuits
Input
IN
IN
VKA IKA R1 VREF IREF VREF
IKA VKA
VKA
R2
IZ(OFF)
Note:VKA=VREF(1+R1/R2)+IREFxR1
Fig 1. Test Circuit for VKA= VREF
Fig 2. Test Circuit for VKA > VREF
Fig 3. Test Circuit for Off-State Current
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
Small-Signal Voltage Amplification vs Frequency
60
AV-Small Signal Voltage Amplification (dB)
50 40 30 20 10 0 1K 10K
IKA=10mA TA=25oC 15K 9F
Output IKA 232
+ 8.25K -
Test Circuit for Voltage Amplification
f-Frequency-Hz
100K
1M
10M
Reference Impedance vs Frequency
100
ZKA Reference Impedance ()
I KA=10mA o TA =25 C
10
50 +
1
0.1 1K 10K 100K 1M 10M
f-Frequency-Hz
150 I KA CL
STABILITY BOUNDARY CONDITIONS
100 90 80 IKA-Cathode Current-mA 70 60 50 40 30 20 10 0 0.001 0.01 0.1 1 CL-Load Capacitance-F 10
CL R2
A VKA=Vref B VKA=5V C VKA=10V D VKA=15V B
TA=25oC
Stable
Stable A
C
Test Circuit for Curve A
D
R1=10K
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial VKA and I KA conditions with CL =0.V BATT and CL were then adjusted to determine the ranges of stability.
Test Circuit for Curve B, C, and D
AP432/AP432A Rev. 6
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1K
+ -
+
GND
Output I KA
GND
Test Circuit for Reference Impedance
VBATT
I KA 150
+ -
VBATT
MARCH 2007
(c) Diodes Incorporated
AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Application Examples
V IN
VIN R CL R R1A R1B V IN I OUT
ON R2A R2B OFF
+
LED on when Low Limit < V < High Limit IN (1+R1B/R2B) Low Limit V REF (1+R1A/R2A) High Limit V
REF
Delay = RC x ln (
VIN V -V
IN
)
I OUT = V REF / RCL
REF
Fig. 4 Voltage Monitor
V IN I OUT
Fig. 5 Delay Timer
Fig. 6 Current Limiter or Current Source
V IN
V OUT
VIN
PUSE R1
V OUT
R1
RS
R2
R2
I OUT = V REF / RS
V OUT = (1 + R1/R2) x VREF
LIMIT
(1 + R1/R2) x VREF
Fig. 7 Constant-Current Sink
Fig. 8 Higher-Current Shunt Regulator
Fig. 9 Crow Bar
VIN R1A R1B Output ON when Low Limit +
R2A
R2B
VBE
Low Limit High Limit
V REF (1 + R1B/R2B) +VBE V REF (1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Information
(1) SOT23(R) /SOT25/SC59
(Top View) XX Y M X Y : Year M : Month (A~L) X : L : Lead Free G :Green
Marking Code
SOT23(R) /SOT25/SC59
(2) SOP-8L
(Top view)
8 5
Logo Part Number
AP432 X YY WW X
1 4
Accuracy Blank: 1.24 1% A: 1.24 0.5% L : Lead-Free Package G : Green WW : Nth week YY : Year
SOP-8L
(3) TO92-3
(Top View) Accuracy Blank: 1.24 + 1% A: 1.24 + 0.5% AP432 X Y WW X X TO92-3L L : Lead Free Y : Year WW :Nth week X : Internal code
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Information
(Continued)
Marking Code Table Device
AP432SA AP432ASA AP432SR AP432ASR AP432Q AP432AQ AP432W AP432AW AP432R AP432AR
Package (Note 10)
SOT23 SOT23 SOT23R SOT23R SOT25 SOT25 SC59 SC59 SC59 SC59
Marking Code
D3 D4 D7 D8 B7 B8 B3 B4 B5 B6
Date Code
YM YM YM YM YM YM YM YM YM YM
Note: 10. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP432/AP432A Rev. 6
10 of 12
MARCH 2007
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Information
( All Dimensions in mm )
(1) SOT25
(2) SC59
0.35/0.50
1.50/1.70 Typ 1.60
TOP VIEW
2.70/3.00 Typ 2.80
1.50/ 1.70
TOP VIEW
2.70/ 3.00
2.90/3.10 Typ 3.00 1.00/1.30 Typ 1.10 0.013/0.10 Typ 0.05 0.10/0.20 Typ 0.15
1.90 2.90/3.10 1.00/ 1.30 0.013/0.10 0.10/0.20
Typ Typ 0.95 0.55
0.35/0.55 Typ 0.40
0.95
0.35/0.55 0/8
(3) SOT23(R)
(4) SOP-8L
0.37/0.51
8
5 5.90/6.10 Typ 6.00 4
1.20/1.40 2.30/2.50
1
TOP VIEW
0.45/0.60
0.89/ 1.03 1.80/2.00 2.80/3.00 0.903/ 1.10 0.085/0.180
9
0.30/0.50 Typ 0.40
(A ll s i de )
3.80/3.90 Typ 3.85 0.35
4
0.013/ 0.10
1.40/1.50 Typ 1.45
R
0/8
0.60/0.70 Typ 0.65 0.15/0.25 Typ 0.20
0.60/ 0 Typ .80 0. 70
45
3
0.45/0.61
1 0.
1.27
0.08/0.25 Typ 0.15 4.85/4.95 Typ 4.90
3.85/3.95 Typ 3.90
AP432/AP432A Rev. 6
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AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Information
(5) TO92-3L for Ammo pack
(Continued) ( All Dimensions in mm )
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AP432/AP432A Rev. 6
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MARCH 2007
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