1.24V ADJUSTABLE PRECISION SHUNT REGULATORS

www.DataSheet4U.com MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS Description The GM432's are low-voltage three-terminal adjustable precision shunt regulators with specified thermal stability over their full temperature range. Output voltage can be set to any value from Vref (1.24V) to 16V by using two external resistors. Their active output circuitry provides a very unique turn-on characteristic, making them excellent replacements for zener diodes in many applications such as onboard regulation and adjustable power supplies. In a wide range of home applications, these versatile darlings are ideal voltage references for 3.0V to 3.3V switching power suppies. With operational cathode current as low as 80µA, batteries keep on going. Whatever your application is, the GM432's offer the optimum combination of performance, reliability, and economy. Features Low-voltage operation, down to 1.24V 0.5%, 1% or 2% reference voltage tolerance Adjustable output voltage, VO = Vref to 16V Sink Current Capability 80µA to 100mA Low dynamic output impedance, 0.05W typical Wide temperature range, 0° to +70°C Pin-to-pin replacement for TLV431, SC431L Available in SOT-23, SOT-25, SOT-89, TO-92 and SOP-8 Application Switching power supplies Linear regulators Adjustable supplies Instrumentation Battery-operated computers, PDA's portable devices Monitors, TV's, camcorders Computer disk drives LOGIC SYMBOL BLOCK DIAGRAM (POSITIVE LOGIC) CATHODE REFERENCE REFERENCE + ANODE CATHODE V ref = 1.24V ANODE www.gammamicro.com GM432 V0.11 1 _ MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS MARKING INFORMATION & PIN CONFIGURATIONS (TOP VIEW) SOT-25(SOT-23-5) ANODE 5 SOT-23 REF 4 TO-92 GM 432G AYWW 2 Anode 3 XXXYW 1 2 3 1 XXXYW NC NC CATHODE REF Cathode 1. REF 2. Anode 3. Cathode 1 2 3 SOP-8 SOT-89 ANODE REF ANODE NC 8 7 6 5 GM432G AYWW REF 1 2 3 CATHODE GM432G AYWW 1 2 3 4 CATHODE ANODE NC ANODE XXX = Marking Code G** = Grade A = Assembly Location Y = Year WW, W= Weekly ANODE ORDERING INFORMATION Ordering Number Precision Device code GM432AT92B GM432AT92RL GM432AST23R GM432AST25R GM432AS8R GM432AST89R GM432BT92B GM432BT92RL GM432BST23R GM432BST25R GM432BS8R GM432BST89R GM432CT92B GM432CT92RL GM432CST23R GM432CST25R 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 1% 1% 1% 1% 1% 1% 2% 2% 2% 2% 2% 2% MAA MAA MAA MAA MAA MAA MAB MAB MAB MAB MAB MAB MAC MAC MAC MAC MAC MAC C C B B Grade A A Package TO-92 TO-92 SOT-23 SOT-25 SOP-8 SOT-89 TO-92 TO-92 SOT-23 SOT-25 SOP-8 SOT-89 TO-92 TO-92 SOT-23 SOT-25 SOP-8 SOT-89 Shipping 1,000 Units/ ESD Bag 2,000 Units/ Ammo Pack(Tape) 3,000 Units/Tape &Reel 3,000 Units/Tape &Reel 2,500 Units /Tape & Reel 1,000 Units / Tape & Reel 1,000 Units/ ESD Bag 2,000 Units/ Ammo Pack(Tape) 3,000 Units /Tape &Reel 3,000 Units /Tape &Reel 2,500 Units /Tape & Reel 1,000 Units / Tape & Reel 1,000 Units/ ESD Bag 2,000 Units/ Ammo Pack(Tape) 3,000 Units /Tape &Reel 3,000 Units /Tape &Reel 2,500 Units /Tape & Reel 1,000 Units / Tape & Reel GM432 2 GM432CS8R GM432CST89R * For detail Ordering Number identification, please see last page. **Grade A: indicates Precision of 0.5%, B: indicates Precision of 1%, C: indicates Precision of 2% MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS ABSOLUTE MAXIMUM RATINGS (over free-air temperature range except as noted) PARAMETER Cathode Voltage (1) Continuous cathode current Reference input current range Power dissipation at TA = 25°C SOT-23 SOP-8 TO-92 Package thermal impedance SOT-23 SOT-25 TO-92 SOP-8 (2, 3) SYMBOL VKA IK Iref PD VALUE 20 100 3 UNIT V mA mA 0.37 0.49 0.95 W q JA 336 256 132 97 0 to + 70 260 °C/W Operating ambient temperature range Lead temperature (soldering) 10 seconds TA TLEAD °C °C These are stress ratings only. Functional operation of the device at these or any conditions beyond the "recommended operating conditions" is not implied. Exposure to absolute maximum rated conditions may affect device reliability. NOTES: 1. Voltage values are with respect to the anode except as noted. 2. Maximum power dissipation is a function of TJ(max), qJA and TA. Maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) - TA)/ qJA. 3. Package thermal impedance is calculated per JESD 51. RECOMMENDED OPERATING CONDITIONS PARAMETER Cathode Voltage Cathode Current SYMBOL VKA IK MINIMUM Vref 80µA MAXIMUM 16 100 UNIT V mA GM432 3 MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted) GM432A (0.5%) GM432A (0.5%) PARAMETER Reference input Voltage Vref temp deviation Ratio of change in Vref to change in VKA Reference input current Deviation of reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance Vref CONDITION VKA = Vref, IK = 10 mA, TA = 25°C (1) VKA=Vref,IK=10 mA,TA= 0 to +70°C (1) MIN 1.234 1.222 TYP 1.240 MAX 1.246 1.258 25 UNIT V mV mV/V Vdev VKA = Vref, IK = 10 mA (1) DVref DVKA Iref IK = 10mA, DVKA = 16V to Vref IK = 10mA, R1 = 10KW, R2 = (2) 10 - 2.7 -1.0 0.15 0.1 0.5 0.4 mA mA Iref(dev) IK = 10mA, R1 = 10KW, R2 = TA = full range IK(min) V = V KA ref (1) (2) 20 0.125 (3) 80 0.150 0.150 0.15 mA IK(off) VKA = 6V, Vref = 0V (3) VKA = 16V, Vref = 0V mA W 0.135 0.05 | ZKA | f 1kHz,VKA=Vref, IK=100mA to 100mA (1) GM432B (1.0%) PARAMETER Reference input Voltage Vref temp deviation Ratio of change in Vref to change in VKA Reference input current Deviation of reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance NOTES: (1) See test circuit 1 on page 4. (2) See test circuit 2 on page 4. (3) See test circuit 3 on page 4. CONDITION Vref VKA = Vref, IK = 10 mA, TA = 25°C (1) (1) MIN 1.228 1.215 TYP 1.240 MAX 1.252 1.258 UNIT V mV mV/V VKA=Vref,IK=10 mA,TA= 0 to +70°C Vdev VKA = Vref, IK = 10 mA (1) DVref DVKA Iref IK = 10mA, DVKA = 16V to Vref IK = 10mA, R1 = 10KW, R2 = (2) 10 - 2.7 -1.0 0.15 0.1 25 0.5 0.4 mA mA Iref(dev) IK = 10mA, R1 = 10KW, R2 = TA = full range IK(min) V = V (1) KA ref VKA = 6V, Vref = 0V (3) VKA = 16V, Vref = 0V (3) (2) 20 0.125 0.135 0.05 80 0.150 0.150 0.15 mA IK(off) mA W | ZKA | f 1kHz,VKA=Vref, IK=100mA to 100mA (1) GM432 4 MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted) GM432C (2.0%) PARAMETER Reference input Voltage Vref temp deviation Ratio of change in Vref to change in VKA Reference input current Deviation of reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance NOTES: (1) See test circuit 1. (2) See test circuit 2. (3) See test circuit 3. CONDITION Vref Vdev DVref DVKA Iref VKA = Vref, IK = 10 mA, TA = 25°C VKA = Vref, IK = 10 mA (1) IK = 10mA, DVKA = 16V to Vref IK = 10mA, R1 = 10KW, R2 = (2) (1) (1) MIN 1.215 1.200 TYP 1.240 MAX 1.265 1.280 UNIT V mV mV/V VKA=Vref,IK=10 mA,TA= 0 to +70°C 10 - 2.7 -1.0 0.15 0.1 35 0.5 0.4 mA mA I = 10mA, R1 = 10KW, R2 = Iref(dev) K TA = full range IK(min) VKA = Vref (1) VKA = 6V, Vref = 0V VKA = 16V, Vref = 0V (3) (3) (2) 20 0.125 0.135 0.05 80 0.150 0.150 0.15 mA IK(off) mA W | ZKA | f 1kHz,VKA=Vref, IK=100mA to 100mA (1) TEST CIRCUITS VIN VKA VIN VKA lref R1 V ref R2 Vref lref Vref VIN VKA lk(off) lk Test Circuit 1 V KA = V ref Test Circuit 2 V KA > V ref Test Circuit 3 Off-State GM432 5 MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS TYPICAL APPLICATIONS GM432A, GM432B Vin R1 Vout Vin R1 Vout R2 R2 R1 Vout=( 1+ R2 ) Vref R1 ) Vref R2 Vout=( 1+ Figure 1. Shunt Regulator Figure 2. High Current Shunt Regulator Vin GM 7805 In Out Common Vin Vout R1 R1 Vout R2 R1 )Vref R2 R2 Vout=(1+ Vout=(1+ Vout(min) = Vref+ 5.0V R1 ) Vref R2 2.0V Figure 3. Output Control for a Three Terminal Fixed Regulator Vout(min) = Vref+ Vbe Figure 4. Series Pass Regulator Vin RCL Iout Vin Vout Isink V Isink= ref RS Iout= Vref RCL RS Figure 5. Constant Current Source Figure 6. Constant Current Sink Vin R1 Vout Vin R1 Vout GM432 R2 R2 Vout(trip)=(1 + R1 ) Vref R2 Vout(trip)=(1 + R1 ) Vref R2 Figure 7. TRIAC Crowbar Figure 8. SRC Crowbar 6 MICROELECTRONICS A A Power Management GM432 1.24V ADJUSTABLE PRECISION SHUNT REGULATORS Notes: 1. Set VOUT according to the following equation: VOUT = VREF ( 1 + R1 )+ IREF R1 R2 TYPICAL APPLICATION CIRCUIT V IN R V OUT R1 V REF R2 GM432 2. Choose the value for R as follows: The maximum limit for R should be such that the cathode current, IK, is greater than the minimum operating current (80µA) at VIN(MIN)* The minimum limit for R should be such that the cathode current, IK, does not exceed 100mA under all load conditions, and the instantaneous turn-on value for IK does not exceed 150 mA. Both of the following conditions must be met: Rmin VIN(max) 150mA (to limit instantaneous turn-on IK) GND Rmin VIN(max)-VOUT IOUT(min)+100mA (to limit IK under normal operating conditions) Typical Performance Characteristics 15 I K Cathode Current (mA) 200 V KA =V REF T A =25°C I K Cathode current (mA) 175 150 125 100 75 50 25 0 -25 -50 -1 10 5 0 -5 -10 -2 V KA =V REF T A =25 C I min -1 0 0.5 1 1.5 -0.5 0 0.5 1 1.5 V KA Cathode Voltage (V) Cathode Voltage (V) Figure 9. Cathode Current vs. Cathode Voltage 250 I K =10 mA IREG, Reference Input Current (nA) Figure 10. Cathode Current vs. Cathode Voltage 1.2440 I K =10 mA IREG, Reference Voltage - V R1=10KW R2= Open 200 150 100 50 0 0 1.2420 1.2400 1.2380 1.2360 1.2340 0 10 20 30 40 50 60 70 10 20 30 40 50 60 70 T J , Junction Temperature - C T J , Junction Temperature - C Figure 11. Ref.