AS431

AS431 ALPHA | Alldatasheet

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SN Excellence in Analog Power Products AS431C Precision Adjustable Shunt Regulator FEATURES APPLICATIONS « Low Temperature Coeffecient 30 ppm/°C ¢ Switching Power Supplies ¢ Offered in TO-92 ¢ Error Amplifiers ¢ Improved Replacement in Performance for TL431 ¢ Single Supply Amplifier « Low Cost Solution ¢ = Monitors / VCR / TV © Personal Computers PRODUCT DESCRIPTION The ALPHA Semiconductor AS431C is a 3-Terminal Adjustable Shunt Voltage Regulator providing a highly accurate bandgap reference. AS431C acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The AS431C thermal stability, wide operating current (150mA) and temperature range (105°C) makes it suitable for all variety of applications that are looking for a low cost solution with high performance. The output voltage may be adjusted to any value between Varr and 36V with 2 external resistors. The AS431C is operating in full industrial temperature range of 0°C to 105°C. The AS431C is available in TO-92 and SOT-89 packages. PIN CONFIGURATION TO-92 (N) SOT-89 (M1) ALPHA uu u REF CATHODE T 20 ANODE REF ANODE CATHODE Bottom View Front View CATHODE (K)

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|_Number Range pe AS431CN 0°C to 105°C TO-92 REFERENCE AS431CM1 0°C to 105°C SOT-89 ®) ft i. ANODE (A) Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev.11/1698 @™ 9026403 OO00L%2 3b5 mm a eeeaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaasaacacacsaasssaaasl

Parameter | __Symbol_| Rating | Units Cathode-Anode Reverse Breakdown Vv Anode-Cathode Forward Current A Operating Cathode Current mA Reference Input Current [oi mA ‘Continuous Power Dissipation at 25°C |” | gs | TO-92 775 mW 8L SOIC 750 mW SOT-89 1000 mW Junction Temperature °C Storage Temperature °C Lead Temperature (Soldering 10 sec.) °C ‘Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. RECOMMENDED CONDITIONS TYPICAL THERMAL RESISTANCE Parameter Symbol Rating Unit Package Type O54 O5c Typical Derating Cathode Voltage Via Var to 20 Vv TO-92 160°C/W 80°C/W 6.3 mW/°C SOT-89 110°C/W__8°C/W 9.1. mW/?C Cathode Current Ik 10 mA ELECTRICAL CHARACTERISTICS at 25°C_I, @ 10mMA_Vi=Veer, unless otherwise specified. Min Typ Max Sai [iiveesey ren2 | | oe [os | AVK 10V to36V_TC=2 -2 -0.4 0.3 [Reference Input Curent ee TC=2 To Ts [Txcr Temp Deviation | Ales [Over Temp. TC=2 | | oa [2 [pA | [Min Ix forRegulation Tn PTC=E To mA recite em Pe Via = 36V_TC=3 [ Dynamic Output Impedance Za C= ts 0s fo TC = Test Cireuit Alpha Semiconductor Inc. 1031 Serpentine Lane, Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev.11/1698 @@ 9026403 OO00LS3 cTl a /rrrrrrrrreemeaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaaaaaaaaaaaaaaaaaaaaasaaaaaaaacaasaaasaaaaassaaaamsaamsaasmcammmaammmmaaalll

*CALCULATING AVERAGE TEMPERATURE COEFFICEINT (TC) FT 2 & x é 05 0 — | as etcinmvec = —S¥xne@¥) | AT, = > Ay, 10 —— EE ) x 100 5000 + 0s : @TCinmvrc = (Serve) * AV pce Rea) x 10° eTCin ppm*c = (wate) 1% 0 is 390 4 6 1 90 105 AT, a 0.07 mv/ec 0.003 %/°C 27 ppm/*C TEST CIRCUITS Vin Vea= Veer Vin View Vin View Wer) R 1640 1638 1639 TEST CIRCUIT TEST CIRCUIT TEST CIRCUIT For Vaa= Vuer For Via > Vaer For Trove Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 11/1698 @™ 9026403 OO00b94 135 ee

TYPICAL PERFORMANCE CURVES ‘Low Current Operating Characteristics High Current Operating Characteristics » | | | se LETT og eH z/ |] ) ] | tt eft Pitty yt fg ee ef TTT tr Tt Tl Py ee 2 See ey ee te ae * ft tt tai ot LATE TT TTT] = --ae »LUET TTT TTT wt] i tt Pt wi LET ETT TTT Vxcq~ Cathode Voltage (V) Figure 3 Figure2 Off State Leakage Reference Voltage vs. Ambient Temperature “ASCE ee TT SOAASAASAAHAAEAAY/ OOO OMOTERUAARUORNEEED g A — PTL] ELIT T TET ETT gw LLL SSO PLU A eee TET TT | oe PTT PRN i HEH 2 oa 7 ee LL) eT el nuse==ascnnnnannnnn een DERAAEAAAAAAAAALADL Pi peer iT tty Ere wu UOTE ET o » 8 » @ we o ™-» oe ww ww we

1 Ambient Temperate (°C) 1 Ambient Temperature (°C)

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TYPICAL PERFORMANCE CURVES Reference Input Current Reference Voltage Line Regulation 2s we -10 SSS LTT g LLESS88J 1 ETE RE RNENN a 2 INe NN PUTT = LESS i z aH LLL TLS ° Figure 7 ‘T, - Ambient Temperature (°C) ‘Figure 6 Noise Voltage ‘Low Frequency Dynamic Output Impedance PTL NLT 1) WELLE EET et J ae Ee CAT et Peet tt td § om LLY A FE 4 iN 4 PLU LLL AR » ons Try] LTE ET LLL PUT TE UT I tert ° Figure 9 f-Prequeney (1) Figure 8 Alpha Semiconductor Inc, 1031 Serpentine Lane, Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev1hese ma 9026403 COOObS6 TOO mm

TYPICAL PERFORMANCE CURVES Dynamic Output Impedance es ree HE ty a a a a et [it Ti ttt Yi PLE TT A ae aS 7, ELT Ti we et TAT Ty i a a a Petty tty tt LL TT f- Frequency (Hz) Figure 10 Small Signal Voltage Gain vs. Frequency SNM corral LINE ALIN a POTICIN oP Bo TN PT TE IN =

10 IN -

LULL LL_LUN 1 ‘ Toe 1x 1M tom 1- Frequency (Hz) Figure 11 Alpha Semiconductor Inc, 1031 Serpentine Lane. Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 nae @™§ 9026403 OO0Ob97 947 me

TYPICAL PERFORMANCE CURVES pono = pp H | aascoaseeny SO AESRREREE CG PEELE oe Figure 12 ~~~ Alpha Semiconductor Inc. 1031 Serpentine Lane, Pleasanton, CA 94566 Tel: (925) 417-1391 Fax: (025) 417-1390 M™@ 9026403 0000654 443 me