(ZTL431 / ZTL432) Cost effective adjustable precision shunt regulator

ZTL431, ZTL432 Cost effective adjustable precision shunt regulator Description The ZTL431 and ZTL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 20 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. The ZTL432 has the same electrical specifications as the ZTL431 but has a different pin out in SOT23 (F-suffix) and SOT23F (FF-suffix). Both variants are available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively. These are functionally equivalent to the TL431/ TL432 except for maximum operation voltage, and have an ambient temperature range of -40 to 125°C as standard. Features • • www.DataSheet4U.com Applications • • • • Opto-coupler linearization Linear regulators Improved zener Variable reference Temperature range ................ -40 to 125°C Reference voltage tolerance at 25°C • • 0.5% ..................................... B grade 1% ......................................... A grade • • • • Low output noise 0.2 typical output impedance Sink current capability ...... 1mA to 100mA Adjustable output voltage ...... VREF to 20V Pin connections ZTL431_F SOT23 ZTL431_FF SOT23F (top view) ZTL432_F SOT23 ZTL432_FF SOT23F (top view) ZTL431_H6 SC70-6 (top view) Cathode 1 3 Anode Ref 2 Ref 1 3 Anode Cathode 2 Cathode 1 *2 REF 3 6 Anode 5* 4 NC Issue 9 - June 2007 © Zetex Semiconductors plc 2007 1 www.zetex.com ZTL431, ZTL432 Ordering information Tol. Order code ZTL431ACSTZ ZTL431AE5TA ZTL431AFFTA 1% ZTL431AFTA ZTL431AH6TA ZTL432AFFTA ZTL432AFTA ZTL431BCSTZ ZTL431BE5TA ZTL431BFFTA 0.5% ZTL431BFTA ZTL431BH6TA ZTL432BFFTA ZTL432BFTA Pack TO92 SOT23-5 SOT23F SOT23 SC70-6 SOT23F SOT23 TO92 SOT23-5 SOT23F SOT23 SC70-6 SOT23F SOT23 Part mark ZTL431A 31A 31A 31A 31A 32A 32A ZTL431B 31B 31B 31B 31B 32B 32B Status* Last time buy Preview* Active Active Active Active Active Last time buy Preview * Reel Size Concertina 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm Concertina 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm Tape width (mm) N/A 8 8 8 8 8 8 N/A 8 8 8 8 8 8 Quantity per reel 1500 3000 3000 3000 3000 3000 3000 1500 3000 3000 3000 3000 3000 3000 Preview* Active Preview* Active Active NOTES: * For availability of pre-production status devices contact your local Zetex representative Absolute maximum ratings Cathode voltage (VKA) .............................................................. 20V Continuous cathode current (IKA) ........................................ 150mA Reference input current range (IREF)..................... -50 µA to 10mA Operating junction temperature ................................. -40 to 150°C Storage temperature ................................................... -55 to 150°C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. Package thermal data Package TO92 SOT23 SOT23F SOT23-5 SOT89 JA PDIS TA =25°C, TJ = 150°C 780mW 330mW 900mW 500mW 1000mW 160°C/W 380°C/W 138°C/W 250°C/W 125°C/W Issue 9 - June 2007 © Zetex Semiconductors plc 2007 2 www.zetex.com ZTL431, ZTL432 Recommended operating conditions VKA IKA TA Cathode voltage Cathode current Operating ambient temperature range Min Vref 1 -40 Max 20 100 125 Units V mA °C Electrical characteristics Electrical characteristics over recommended operating conditions, TA = 25°C, unless otherwise stated. Symbol Parameter VREF Reference voltage VDEV Conditions VKA = VREF IKA = 10mA ZTL43_A ZTL43_B TA = 0 to 70° TA = -40 to 85°C TA = -40 to 125°C VKA = VREF to 10 IKA = 10mA VKA = 10V to 20V Min. 2.475 2.487 Typ. 2.5 2.5 6 14 14 -1.4 -1.0 Max. 2.525 2.513 16 34 34 -2.7 -2.0 mV/V mV Units V Deviation of reference voltage over full VKA = VREF temperature range IKA = 10 mA Ratio of change in reference voltage to the change in cathode voltage Reference input current ΔVREF ΔVKA IREF IKA = 10mA, R1 = 10k R2 = OC TA = 0 to 70°C TA = -40 to 85°C TA = -40 to 125°C 2 0.8 0.8 0.8 0.4 0.1 0.2 4 1.2 2.5 2.5 0.6 0.5 0.5 µA ΔIREF IKA = 10mA IREF deviation over full R1 = 10k temperature range R2 = OC µA IKA(MIN) Minimum cathode VKA = VREF current for regulation IKA(OFF) Off state current VKA = 20V, VREF = 0V Dynamic output VKA = VREF, f = 0Hz RZ impedance mA µA Issue 9 - June 2007 © Zetex Semiconductors plc 2007 3 www.zetex.com ZTL431, ZTL432 Typical characteristics IKA = 10mA VREF = VKA 125 Issue 9 - June 2007 © Zetex Semiconductors plc 2007 4 www.zetex.com ZTL431, ZTL432 Typical characteristics VKA IKA IKA VKA VKA VKA IKA VREF < VKA < 20, IKA = 10mA, TA = 25°C Issue 9 - June 2007 © Zetex Semiconductors plc 2007 5 www.zetex.com ZTL431, ZTL432 Application cicuits V+ R1 VREF VREF VOUT V+ R1 VOUT R2 R2 VOUT VREF VOUT VREF Shunt regulator Higher current shunt regulator V+ ZSR*** V+ In Out Common R1 0.01 F VREF R1 R2 VOUT(MIN) = VREF + VREG VOUT VREF VOUT VREF VOUT VREF R2 VOUT 30 Output control of a three terminal fixed regulator Series regulator V+ V+ R1 R1 Output Input VTH = 2.5V VON~ 2V VOFF = V+ R2a R2b VREF VREF Output VREF VREF Single supply comparator with temperature compensated threshold Over voltage / under voltage protection circuit Issue 9 - June 2007 © Zetex Semiconductors plc 2007 6 www.zetex.com ZTL431, ZTL432 DC test circuits IL VKA IL VKA VKA IKA IREF IREF IKA IKA(OFF) VREF VREF Figure 1 Test circuit for VKA = VREF Figure 2 Test circuit for VKA > VREF Figure 3 Test circuit for off state current Notes Deviation of reference input voltage, Vdev, is defined as the maximum variation of the reference input voltage over the full temperature range. The average temperature coefficient of the reference input voltage, Vref is defined as: V DEV × 1, 000, 000 V REF ( ppm°C ) = -----------------------------------------------V REF ( T1 – T2 ) ΔV z R z = --------ΔI z The dynamic output impedance, Rz, is defined as: When the device is programmed with two external resistors, R1 and R2, (fig 2), the dynamic output impedance of the overall circuit, R'z, is defined as: R' z = R z ⎛ 1 + R1⎞ -----⎝ R2⎠ Stability boundary The ZTL431 and ZTL432 are stable with a range of capacitive loads. A zone of instability exists as demonstrated in the typical characteristic graph on page 5. The graph shows typical conditions. To ensure reliable stability a capacitor of 4.7nF or greater is recommended between anode and cathode. Issue 9 - June 2007 © Zetex Semiconductors plc 2007 7 www.zetex.com ZTL431, ZTL432 Pin connections - preview and last time buy status devices ZTL431_Z SOT89 (top view) ZTL431_E5 SOT23-5 (top view) ZTL431_C TO92 (underside view) Cathode Anode N/C 1 *2 Cathode 3 5 Anode v Pre iew Anode Ref v Pre iew 4 Ref me t t2iy Gnd as L bu Vref 3 Vz 1 * Pin 2 should be left floating or connected to pin 5 Issue 9 - June 2007 © Zetex Semiconductors plc 2007 8 www.zetex.com ZTL431, ZTL432 Packaging details - SOT23 E Dim. Millimeters A A1 e Inches Max. 0.044 - Dim. e1 E E1 L L1 - Millimeters Min. 2.10 1.20 0.25 0.45 1.90 NOM 2.64 1.40 0.62 0.62 - Inches Max. 0.075 NOM 0.083 0.104 0.047 0.055 0.018 0.024 0.018 0.024 - Min. Max. Min. 1.12 Max. Max. 0.01 0.10 0.0004 0.004 0.30 0.50 0.012 0.020 0.085 0.120 0.003 0.008 2.80 3.04 0.110 0.120 0.95 NOM 0.0375 NOM b e1 b 3 leads C D e L1 E1 D Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches A A1 L c Packaging details - SOT23-5 Dim. A A1 A2 b C D E E1 e e1 L a° 0.10 0° Millimeters Min. 0.90 0.00 0.90 0.20 0.09 2.70 2.20 1.30 0.95 REF 1.90 REF 0.60 30° 0° Max. 1.45 0.15 1.30 0.50 0.26 3.10 3.20 1.80 Min. 0.0354 0.00 0.0354 0.0078 0.0035 0.1062 0.0866 0.0511 Inches Max. 0.0570 0.0059 0.0511 0.0196 0.0102 0.1220 0.1181 0.0708 0.0374 REF 0.0748 REF 0.0039 0.0236 30° Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 9 - June 2007 © Zetex Semiconductors plc 2007 9 www.zetex.com ZTL431, ZTL432 Package details - TO92 Dim. A b C Millimeters Min. 4.32 0.36 2.50 3.30 4.88 2.44 12.70 2.16 1.14 0.41 4.45 4° Max. 4.95 0.51 3.50 3.94 5.88 2.94 15.49 2.41 1.52 0.56 4.95 6° Min. 0.170 0.014 0.099 0.130 0.192 0.096 0.500 0.085 0.045 0.016 0.175 4° Inches Max. 0.195 0.020 0.138 0.155 0.232 0.116 0.610 0.095 0.060 0.022 0.195 6° C E e e1 L R S1 W D *° Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 9 - June 2007 © Zetex Semiconductors plc 2007 10 www.zetex.com ZTL431, ZTL432 Package details - SC70-6 Dim. Millimeters Min. A A1 A2 b C D 0.80 0.80 0.15 0.08 Max. 0.10 0.30 Inches Min. Max. Dim Millimeters Inches . Min. Max. Max. Max. E e L 2.10 BSC 1.25 0.65 BSC 1.30 BSC 0.26 0° 8° 0.0826 BSC 0.0255 BSC 0.0511 BSC 0° 8° 1.35 0.0492 0.0531 1.10 0.0315 0.0433 1.00 0.0315 0.0394 0.25 0.0031 0.0098 0.0787 BSC 0.0039 E1 0.006 0.0118 e1 0.46 0.0102 0.0181 2.00 BSC Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Package details SOT23F D b b L1 L c e1 e Dim. Millimeters A A1 A2 b c Inches Max. Dim. Millimeters Min. E 2.30 1.50 1.10 0.48 0.39 0.05 0° - Inches Max. Min. Max. Min. 0.10 Max. Max. 0.80 1.00 0.031 0.0394 2.50 0.0906 0.0984 1.70 0.0590 0.0669 1.26 0.0433 0.0496 0.68 0.0189 0.0268 0.41 0.0153 0.0161 0.15 0.0019 0.0059 12° 0° 12° - 0.00 0.0043 E1 L R O - E1 E 0.06 0.16 0.0024 0.0006 E2 0.39 0.41 0.0153 0.0161 2.80 3.00 0.1102 0.1181 0.95 ref 1.90 ref 0.0374 ref 0.7480 re