SPX431A_06 SIPEX | Alldatasheet

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Technical content

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation Precision Adjustable Shunt Regulator The SPX43 is a three-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431 has thermal stability, wide operating current of 150mA and broad temperature range of 0°C to 150°C, making it suitable for a variety of applications which require a low-cost, high performance solution. SPX431A tolerance of 0.5% is proven to be sufficient to overcome all other errors in the system to virtually eliminate the need for trimming in the power supply manufacturer's assembly line and contribute a significant cost savings. The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors. The SPX431 is available in SOIC-8, SOT-23-3, SOT-23-5, SOT89, and TO-92 packages. SPX431A,B,C

FEATURES

  • Trimmed Bandgap: 0.5%, 1% and 2%
  • Wide Operating Current: 1mA to 150mA
  • Extended Temperature Range: 0°C to 105°C
  • Low Temperature Coefficient: 30 ppm/°C
  • Improved Replacement in Performance for TL43
  • Low Cost Solution
  • Available in Lead Free, RoHS compliant packaging: SOIC, SOT-89, SOT-23-3, SOT-23-5, and TO-92

APPLICATIONS

  • Battery Operated Equipment
  • Adjustable Supplies
  • Switching Power Supplies
  • Error Amplifiers
  • Single Supply Amplifier
  • Monitors/VCRs/TVs
  • Personal Computers

DESCRIPTION

Anode (A) Cathode (K) 2.5V Reference (R) + TyPICAL APPLICATIONS CIRCUIT

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation TyPICAL ThERmAL RESISTANCES PACKAGE ØJA ØJC TyPICAL DERATING SOT-89 107.1°C/W 8°C/W 9.1 mW/°C SOIC-8 124.8°C/W 45°C/W 5.7 mW/°C SOT-23-5 191°C/W 150°C/W 1.7 mW/°C TO-92 131.9°C/W 80°C/W 6.3 mW/°C SOT-23-3 300°C/W 136°C/W 3.3 mW/°C ABSOLUTE mAXImUm RATINGS Continuous Power Dissipation at 25°C Pd NOTE: 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 speci- fication is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. RECOmmENDED CONDITIONS Typical deratings of the thermal resistances are given for ambient temperature >25°. Cathode Voltage VKA VREF to 36 V Cathode Current IK 0 mA PARAmETER SymBOL RATING UNIT

ELECTRICAL ChARACTERISTICS

Electrical characteristics at 25°C Ik = 10mA Vk = Vref, unless otherwise specified. Parameter Symbol Test Conditions Test Circuit SPX431A SPX431B SPX431C Unit min Typ max min Typ max min Typ max Reference Voltage VREF TJ = 0°C to 105°C 2.490 2.469 2.503 2.515 2.536 2.470 2.449 2.495 2.520 2.541 2.445 2.495 2.545 V V Ratio of Change in VREF to Cath- ode Voltage ∆Vref ∆Vk VREF to 10V 10V to 36V 2 -2.7 -.0 -0.4 0.3 -2.7 -2.0 -.0 -0.4 0.3 -2.7 -.0 -0.4 0.3 mV/ V Reference Input Current IREF 2 0.7 4 0.7 4 0.7 4 µA IREF Temp Deviation ∆IREF TJ = 0°C to Min IK for Regulation IK(MIN) 0.4 0.4 0.4 mA Off State Leak- age IK(OFF) VREF = 0V, VKA = 36V 3 0.04 250 0.04 500 0.04 000 nA Dynamic Output Impedance ZKA fZ = 1kHz

Figure 1. Vref VS Temperature.

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation -2 -1 0 1 2 3 -100 -75 -50 -25 100 125 150 IK - Cathode Current (mA) VKA - Cathode Voltage (V) VKA = VREF Temperature Range: 0°C to 105°C -60 -30 0 30 60 90 120 2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 2.45 TA Ambient Temperature (°C) VREF Reference Voltage (V) VKA = VREF IK = 10mA TyPICAL PERFORmANCE ChARACTERISTICS High Current Operating Characteristics Reference Voltage vs. Ambient Temperature -1.0 0 1.0 2.0 3.0 900 800 700 600 500 400 300 200 100 -100 -200 VKA Cathode Voltage (V) IK Cathode Current (µA) VKA = VREF 0° to 105°C 105°C 25°C -0°C -60 -30 0 30 60 90 120 3.0 2.5 2.0 1.5 1.0 0.5 TA Ambient Temperature (°C) IREF Reference Input Current (µA) R1 = 10kΩ R2 = ∞ IK = 10mA 0 3 6 9 12 15 18 21 24 27 30 -10 -20 -30 -40 -50 VKA Cathode Voltage (V) ∆VREF (mV) 0°C 25°C 75°C 125°CIKA = 10mA Reference Voltage Line Regulation vs, Cathode Volt- age and Tambient Low Current Operating Characteristics Reference Input Current vs. Ambient Temperature f Frequency (Hz) Noise Voltage nV/÷Hz VKA = VREF IK = 10mA TA = 25°C Noise Voltage vs. Frequency

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation TyPICAL PERFORmANCE ChARACTERISTICS (continued) -60 -30 0 30 60 90 120 0.150 0.125 0.100 0.075 0.050 0.025 0.0 TA Free Air Temperature VKA = VREF IK = 1 to 100mA f≤1kHz Low Frequency Dynamic Output Impedance vs. Tambient 10 100 1K 10K 100K 1M 10M START 10.000Hz STOP 50 000 000.000Hz REF LEVEL 60.000dB 0.0deg /DIV 10.000dB 45.000deg MARKER 19 422 MAG (A/R) MARKER 19 422 PHASE (A/R) 611.000Hz -0.125dB 611.000Hz 46.717deg PHASE GAIN 60dB 50dB 40dB 30dB 20dB 10dB 0dB -10dB -20dB -30dB -40dB 215° 180° 135° 90° 45° -45° -90° -135° -180° -215° Small Signal Gain and Phase vs. Frequency; Ik = 0mA, Ta = 25°C IK VIN 9µF 15kΩ 8.25kΩ VOUT GND 230Ω Test Circuit for Gain and Phase Frequency Re- sponse Fz = 100kHz, Ik = 0mA, Ta = 25°C VOUT VIN Test Circuit for Pulse Response Stability Boundry Conditions IK VOUT GND 250Ω 50Ω VIN fp = 100kHz 100 101 102 103 104 105 106 107 100 CL Load Capacitance (pF) IK Cathode Current (mA) A: VKA = VREF B: VKA= 5V at IK=10mA C: VKA=10V at IK=10mA D: VKA=15V at IK=10mA C D B ASTABLE STABLE TA = 25°C

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation TyPICAL PERFORmANCE ChARACTERISTICS (continued) Test Circuit for Stability Dynamic Output Impedance Ta = 25°C, Ik = to 00mA Off-State Leakage Shunt Regulator Vout = (1+R1/R2)Vref 150 W 10kΩ IK CL R 0.01 0.1 100 -50 0 50 100 150 TA Ambient Temperature (°C) IKOFF Cathode Current (nA) VKA = 36V VREF = 0V TA = 25 °C IK =1 to 100mA ZKA - Dynamic Impedance (Ω) f Frequency (Hz) 100 1.0 0.1 0.01 1K 10K 100K 1M 10M 0.1% VIN R3 0.1% VOUT VREF SPX431A,B,C Constant Current, Sink, Isink = Vref/R1 Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters VIN 0.1% ISINK SPX431A,B,C 0.1% 0.1% VOUT SPX431A,B,C Isolated Feedback VOUTRTN R3 sets feedback gain, C1 provides feedback compensation Opto Isolator

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation PACKAGE: 8 PIN NSOIC

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation PACKAGE: 5 PIN SOT-23

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation PACKAGE: 3 PIN SOT-89

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation PACKAGE: 3 PIN TO-92

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation PACKAGE: 3 PIN SOT-23

Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator © 2006 Sipex Corporation Sipex Corporation headquarters and Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600

ORDERING INFORmATION

PART NUmBER ACCURACy OUTPUT vOLTAGE PACKAGE /TR = Tape and Reel TR pack quantity is 3000 for SOT-23-3, 2500 for SOT-23-5, SOT-89 and NSOIC, and 2000 for TO-92 in ammo pack. Available in lead free packaging. To order add “-L” suffix to part number. Example: SPX431AM5/TR = standard; SPX431AM5-L/TR = lead free Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.