AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Description Features * * * * * * * * * Precision reference voltage AP432 : 1.24V 1% AP432A : 1.24V 0.5% TM Sink current capability: 200mA with PowerDI 5 package Minimum cathode current for regulation: 300A 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 TM Packages: SOT-23. SC-59, PowerDI 5 and DFN under development The AP432 and AP432A are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 2.495V (VREF) up to 36V 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/AP432A 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 2 A X X X Reference Voltage SA SN PB FB Tolerance: Blank : +/- 1% A : +/- 0.5% Device (Note 1) AP432(A)SA AP432(A)SN AP432(A)PB AP432(A)FB 7" Tape and Reel Quantity Part Number Suffix Package Packaging Code SA SN PB FB Packing Package Lead-Free : SOT23 F : Lead-Free Blank : Tube or bulk : SC-59 -7/-13 : Taping G : Green : PowerDITM5 : DFN SOT-23 SC-59 PowerDITM5 DFN 3000/Tape & Reel 3000/Tape & Reel NA 3000/Tape & Reel -7 -7 NA -7 13" Tape and Reel Quantity Part Number Suffix 10,000/Tape & Reel 10,000/Tape & Reel 5000/Tape & Reel 10,000/Tape & Reel -13 -13 -13 -13 Typical Application Circuit VOUT VIN + R1 Cin + Cout DP432 R2 VOUT = (1+R1/R2)VREF Precision Regulator Notes: 1. Suffix "A" denotes AP432A device. 2. 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. DS30748 Rev. 1 - 2 1 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Block Diagram Symbol Cathode (C) REF (R) + Cathode (C) VREF REF (R) Anode (A) Anode (A) Pin Configuration Pin Configuration (Top View) Package Pin Configuration (Top View) Package 3 CATHODE SOT23 DFN ANODE 1 ANODE 1 3 CATHODE 2 REF 2 REF 3 CATHODE PowerDITM5 ANODE 1 DS30748 Rev. 1 - 2 2 REF 2 of 12 www.diodes.com 3 CATHODE SC-59 ANODE 1 2 REF AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Absolute Maximum Ratings Cathode Voltage ...........................................................................................................................................................20V Continuous Cathode Current ....................................................................................................................... -10mA ~ 250mA Reference Input Current Range ..................................................................................................................................... 10mA Operating Temperature Range (AP432).............................................................................................................-20C ~ 85C Lead Temperature................................................................................................................................................... 260C Storage Temperature ................................................................................................................................... -65C ~ 150C Power Dissipation (Notes 3, 4) SOT-23 Package.................................................................................. 300mW SC-59 Package................................................................................................. 400mW PowerDITM5 Package .................................................................................. 900mW DFN Package................................................................................................. 250mW Note 3. Note 4. TJ, max =150C Ratings apply to ambient temperature at 25C Electrical Characteristics (TA=25oC, V+=+5.0V, unless otherwise stated) (Note 5) PARAMETER Reference voltage Deviation of Reference input voltage over temperature (Note 5) 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 TEST CONDITIONS SYMBOL MIN. AP432 VKA = VREF, AP432A I KA = 10mA (Fig.1) VKA = VREF, IKA = 10mA, Ta = Full range (Fig.1) VREF 1.227 1.233 1.240 1.240 1.252 1.246 V VREF 3.0 20 mV VREF -1.4 2.0 mV/V IREF 1.4 3.5 A IREF 0.4 1.2 A IKA(MIN) IKA(OFF) 0.15 0.1 0.3 1.0 mA A Z KA 0.2 0.5 IKA = 10mA (Fig.2) VKA = 20V ~VREF 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 V KA = VREF Frequency 1KHz (Fig.1) Dynamic output impedance TYP. MAX. UNIT VMAX VDEV = VMAX - VMIN VMIN TI DS30748 Rev. 1 - 2 TEMPERATURE 3 of 12 www.diodes.com T2 AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Note 5. 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: VDEV ) 10 6 VREF (25C) .............................................. ( ppm ) = C T2 - T1 ( VREF Where: T2 - T1 = full temperature change. VREF can be positive or negative depending on whether the slope is positive or negative. Note 4. 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 Test Circuits Input IN VKA IKA IKA VKA R1 VREF IN R2 VKA IREF VREF IZ(OFF) Note:VKA=VREF(1+R1/R2)+IREFxR1 Fig 1. Test Circuit for VKA= VREF DS30748 Rev. 1 - 2 Fig 2. Test circuit for VKA>VREF 4 of 12 www.diodes.com Fig 3. Test Circuit for off-state Current AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics Cathode current Vs Cathode Voltage Cathode current (uA) Vs Cathode Voltage 600 VKA =Vref Ta=25oC 0 -100 0.5 -0.5 1.5 Cathode Voltage (v) -1.5 200 0 -200 -1 2.5 Reference Voltage Vs Free-Air Temperature -0.5 0 0.5 1.5 1 Cathode Voltage(v) 2 2.5 Reference input current Vs free Temperature Reference input current (uA) 2500 Reference Voltage(mV) VKA =Vref Ta=25oC 400 Cathode current (uA) Cathode current(mA) 100 2495 2490 2485 2 1.8 R1=10K IKA=10mA 1.6 1.4 1.2 2480 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Free-Air Temperature ( oC) 1 -50 -25 0 25 50 75 Free-Air Temperature (oC) 100 125 Change in Reference Voltage (mv) Change in Reference Voltage vs Cathode Voltage 0 -2 IKA=10mA Ta=25oC -4 -6 -8 -10 -12 0 5 DS30748 Rev. 1 - 2 10 15 20 Cathode Voltage (V) 25 30 5 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued) SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY IKA=10mA TA=25oC 50 Output IKA 15K 40 + 9F 30 232 + - AV-Small Signal Voltage Amplification (dB) 60 - 8.25K GND 20 TEST CIRCUIT FOR VOLTAGE AMPLIFICATION 10 0 1K 10K 100K f-Frequency-Hz 1M 10M REFERENCE IMPEDANCE vs. FREQUENCY ZKA Reference Impedance ( ) 100 I KA=10mA o TA =25 C 1K Output I KA 10 50 + GND 1 1 TEST CIRCUIT FOR REFERENCE IMPEDANCE 0.1 1K 10K 100K 1M 10M f-Frequency-Hz DS30748 Rev. 1 - 2 6 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR PULSE RESPONSE 6 TA=25oC Input Input and Output Voltage-V 5 220 4 Pulse Generator f=100kHz 3 Output 50 Output GND 2 TEST CIRCUIT FOR PULSE RESPONSE 1 0 -1 0 1 2 3 4 5 6 7 t-Time-S 150 STABILITY BOUNDARY CONDITIONS 100 90 IKA-Cathode Current-mA 80 TA=25oC A VKA=Vref I KA B VKA=5V C VKA=10V D VKA=15V CL B 50 - VBATT Stable 70 60 + C Stable TEST CIRCUIT FOR CURVE A A 40 30 D I KA 20 10 CL 0 0.001 R2 0.01 0.1 1 C L-Load Capacitance-F 10 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 V KA and I KA conditions with C L =0.V BATT and CL were then adjusted to determine the ranges of stability. DS30748 Rev. 1 - 2 150 R1=10K 7 of 12 www.diodes.com + - VBATT TEST CIRCUIT FOR CURVE B, C, AND D AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Application Examples VIN V IN R CL R R1B R1A ON R2A R2B I OUT V IN + OFF LED on when Low Limit < V < High Limit IN (1+R1B/R2B) Low Limit V REF (1+R1A/R2A) High Limit V Delay = RC x ln ( VIN V -V IN ) I OUT = V REF / RCL REF REF Fig. 5 Delay Timer Fig. 4 Voltage Monitor V IN I OUT Fig. 6 Current Limiter or Current Source V IN V OUT V IN R1 R1 R2 R2 RS LIMIT V OUT = (1 + R1/R2) x VREF I OUT = V REF / RS Fig. 7 Constant-Current Sink V OUT PUSE Fig. 8 Higher-Current Shunt Regulator (1 + R1/R2) x VREF Fig. 9 Crow Bar VIN R1A R1B + R2A R2B Low Limit High Limit Output ON when Low Limit <VIN < High Limit V BE V REF (1 + R1B/R2B) +VBE V REF (1 + R1A/R2A) Fig.10 Over-Voltage / Under-Voltage Protection Circuit DS30748 Rev. 1 - 2 8 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Package Diagrams (All Dimensions in mm) (2) SOT-23 (1) PowerDITM5 6.40/ 6.60 1.20/1.40 0.33/0.43 TOP VIEW 5.30/5.45 0.45/0.60 0.80/ 0.99 G 0.89/ 1.03 2.80/3.00 0.903/ 1.10 1.84 NOM 0.50/ 0.65 2.30/2.50 1.70/ 1.88 0.50/ 0.65 0.37/0.51 1.05/ 1.15 3.90/ 4.05 0.33/0.43 0.80/ 0.99 0.085/0.180 0.013/ 0.10 0.45/0.61 3.90/4.05 3.05 NOM 0/8 1.70/1.88 0.75/0.95 3.55 NOM 6.40/6.60 0.80/0.99 1.84 NOM 1.20/1.50 0.50/0.65 0.80/0.99 (3) DFN1006-3 (4) SC-59 0.35/0.50 0.55/0.65 Typ 0.60 0.95/1.05 Typ 1.00 0.10/0.20 Typ 0.15 0.45/0.55 Typ 0.50 TOP VIEW 1.50/ 1.70 0/0.05 Typ 0.03 0.95/1.05 Typ 1.00 2.70/ 3.00 0.35 1.90 0.20/0.30 Typ 0.25 0.20/0.30 Typ 0.25 2.90/3.10 Typ 0.40 1.00/ 1.30 0.013/0.10 0.10/0.20 0.95 0.35/0.55 0/8 DS30748 Rev. 1 - 2 9 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR Marking Information (1) SOT-23/SC-59 XX X YM (Top View) Marking Code Date Code Y : Year M : Month (1~D) X : Blank : Lead Free G : Green (2) PowerDITM5 ( Top view ) AP432 X Logo Date code YWW X Y : Year WW: Nth w eek Lead Free Blank : Lead Free G : Green DS30748 Rev. 1 - 2 10 of 12 www.diodes.com Accuracy Blank : 2 . 495 1 % A : 2 . 495 0 . 5 % AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR (3) DFN ( Top view ) XX Marking Code Lead Free Blank : Lead Free Green : Underlined First code Date Code Key Year 2006 2007 2008 2009 2010 Code T U V W X Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec Code 1 2 3 4 5 6 7 8 9 O N D Marking Code Table Notes: Device Package Marking Code Date Code AP432FB AP432AFB AP432SA AP432ASA AP432SN AP432ASN AP432APB AP432APB DFN DFN SOT-23 SOT-23 SC-59 SC-59 PowerDITM5 PowerDITM5 D3 D4 D3 D4 D3 D4 AP432 AP432A YM YM YM YM YWW YWW 6. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf. PowerDI is a trademark of Diodes Incorporated. DS30748 Rev. 1 - 2 11 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated AP432/AP432A ADJUSTABLE PRECISION SHUNT REGULATOR DS30748 Rev. 1 - 2 12 of 12 www.diodes.com AP432/AP432A (c) Diodes Incorporated