CL2431 CALOGIC | Alldatasheet

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Technical content

FEATURES

  • • Temperature-Compensated: 30ppm/oC
  • • Trimmed 0.5% Bandgap Reference
  • • Internal Amplifier with 100mA Capability
  • • Temperature Range: Extended to 0 to 105oC
  • • Low Frequency Dynamic Output Impedance: < 150mΩ
  • • Low Output Noise
  • • SOT-23 Replacement for TL431

DESCRIPTION

ORDERING INFORMATION

Part Package Tolerance Temperature Range CL2431VS SOT-23 1.0% 0 to +105 oC CL2431AVS SOT-23 0.5% 0 to +105 oC CL2431IVS SOT-23 1.0% -40 to +85 oC CL2431IAVS SOT-23 0.5% -40 to +85 oC CORPORATION CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 PIN CONFIGURATION (Top View) The CL2431 is a three terminal adjustable voltage reference designed to act as an open-loop error amplifier with a 2.5V temperature compensated reference. Operating as a low temperature coefficient zener which is programmable from V REF to 18V with two external resistors while providing a wide operating current range of 1.0mA to 100mA with a typical dynamic impedance of 0.15Ω . As a shunt regulator the device can be used as either a positive or negative voltage reference. Active output circuitry provides a very sharp turn-on characteristic, making the CL2431 an excellent replacement for low-voltage zener diodes in many applications, including on-board regulation and adjustable power supplies. 1J-22 CATHODE REFERENCE SOT-23 (VS) ANODE

SYMBOL PARAMETER RATING UNITS VKA Cathode-Anode Reverse Breakdown 18 V IAK Anode-Cathode Forward Current 1 A IKA Operating Cathode Current 100 mA IREF Reference Input Current 1 mA PD Continuous Power Dissipation at 25oC SOT-23 200 mW TJ Junction Temperature 150 oC TSTG Storage Temperature –65 to 150 oC TL Lead Temperature, Soldering 10 Seconds 300 oC 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 SYMBOL PARAMETER RATING UNIT VKA Cathode Voltage V REF to 18 V IK Cathode Current 10 mA TYPICAL THERMAL RESISTANCES PACKAGE θJA θJC TYPICAL DERATING SOT-23 575 oC/W 150 oC/W 1.7mW/ oC CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 1G-36ANODE (A) CATHODE (K) 2.5V REFERENCE (R) + FUNCTIONAL BLOCK DIAGRAM

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 TEMPERATURE (˚C) 0.019 mV/˚C 0.001 %/˚C 7.6 ppm/˚C 0.22000 000 mV ppm 1J-28 15 30 45 60 75 90 105 –10 ΔV REF ΔT

  • TC in mV/oC = ΔVREF (mV ) ΔTA
  • TC in %/oC = ΔVREF VREF at 25oC x 100 ΔTA
  • TC in ppm/oC = ΔVREF VREF at 25oC x 106 ΔTA *CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) TEST CIRCUITS INV KAV KI 1G-38 REFI REF= V REFI INV KAV REF(V ) KI 1G-39 INV KAV K(OFF)I 1G-40 TEST CIRCUIT 1 TEST CIRCUIT 2 TEST CIRCUIT 3

ELECTRICAL CHARACTERISTICS

Electrical characteristics are guaranteed over full junction temperature range (0 to 105oC). Ambient temperature must be derated based on power dissipation and package thermal characteristics. The conditions are: VKA = VREF and IK = 10mA unless otherwise stated. SYMBOL PARAMETER MIN TYP MAX UNIT CIRCUIT TEST CONDITION VREF Reference Voltage 2.490 2.500 2.515 V 1 T A = 25oC, 0.5% CL2431A 2.470 2.500 2.520 V 1 TA = 25 oC, 1.0% CL2431 TC ΔVREF with Temp.* 0.6 0.2 mV/ oC1 ΔVREF Δ VK Ratio of Change in VREF to Cathode Voltage –2.7 –1.01 mV/V 2 VREF to 10V –2 –0.4 0.3 10V to 18V IREF Reference Input Current 0.7 4 µA2 ΔIREF IREF Temp Deviation 0.4 1.2 µA 2 Over Temp. IK(MIN) Min IK for Regulation 0.4 1 mA 1 IK(OFF) Off State Leakage 0.04 250 nA 3 V REF = 0V, VKA = 18V ZKA Dynamic Output Impedance 0.15 0.5 Ω 1f ≤ 1kHz, IK = 1 to 100mA

TYPICAL PERFORMANCE CURVES CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 100 0.01 –60 1P-43 OFF STATE LEAKAGE –30 0 30 60 90 120 0.1 CURRENT (nA) VKA = 18V VREF = 0V – AMBIENT TEMPERATURE (˚C)TA – OFF STATE CATHODEIZ off 150 –100 –2 3 1G-42 HIGH CURRENT OPERATING CHARACTERISTICS –25 –50 –75 125 100 210–1 – CATHODE VOLTAGE (V)VKA TEMPERATURE RANGE: –55 to 125˚C VKA = VREF – CATHODE CURRENT (mA)IK 2.46 –60 1J-29 TEMPERATURE COEFFICIENT AS A FUNCTION OF TRIM VALUE –30 2.47 2.48 2.49 2.50 2.51 2.52 2.53 0 3 06 09 0 1 2 0 VREF – REFERENCE VOLTAGE (V) VKA = VREF IK = 10mA VREF = 2.500V AT 25˚C – AMBIENT TEMPERATURE (˚C)TA 2.45 VKA – CATHODE VOLTAGE (V) – CATHODE CURRENT ( µA)IK 900 –200 –1.0 3.0 1G-41 LOW CURRENT OPERATING CHARACTERISTICS 1.00 2.0 –100 800 700 600 500 400 300 200 100 125˚C –55˚C 25˚C V= V REFKA TEMPERATURE RANGE: –55 to 125˚C –50 1J-30 REFERENCE VOLTAGE LINE REGULATION 369 1 2 1 5 1 8 –10 –20 –30 –40 VOLTAGE (mV) – CHANGE IN REFERENCEVREF – CATHODE VOLTAGE (V)VKA 25˚C 75˚C 125˚C IK = 10mA TEMPERATURE RANGE: –55 to 125˚C –55˚C 0˚C 3.0 –60 1G-45 REFERENCE INPUT CURRENT –30 0 3 06 09 0 1 2 0 2.5 2.0 1.5 1.0 0.5 CURRENT ( µA) – REFERENCE INPUTIREF TA – AMBIENT TEMPERATURE (˚C) R1 = 10kΩ R2 = ∞ IK = 10mA

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 TYPICAL PERFORMANCE CURVES (continued) 1G-47 NOISE VOLTAGE 100k f – FREQUENCY (Hz) 10k1k100 NOISE VOLTAGE nV/ Hz VKA = VREF = 10mA TA = 25˚C IK 0.150 0.0 –60 1G-48 LOW FREQUENCY DYNAMIC OUTPUT IMPEDANCE –30 0 3 06 09 0 1 2 0 0.125 0.100 0.075 0.050 0.025 – DYNAMIC IMPEDANCE ( Ω )Z KA VKA = VREF = 1 TO 100mA f ≤ 1kHz IKA – FREE AIR TEMPERATURETA 100 0.01 1G-49 DYNAMIC OUTPUT IMPEDANCE 10M f – FREQUENCY (Hz) 1M100k10k 1.0 0.1 – DYNAMIC IMPEDANCE ( Ω )ZKA TA = 25˚C = 1 TO 100mAIK 1J-31 SMALL SIGNAL VOLTAGE GAIN vs FREQUENCY 10M f – FREQUENCY (Hz) 1M100k10k GAIN (dB) – SMALL SIGNAL VOLTAGEA V IK = 10mA TEMPERATURE RANGE: –55 to 125˚C 1H-01 KI 230Ω GND OUT 15k 8.25k 9µF

TA = 25˚C A C D – CATHODE CURRENT (mA)IK B A: VKA = VREF B: VKA = 5V AT IK = 10mA C: VKA = 10V AT IK = 10mA D: VKA = 15V AT IK = 10mA STABILITY REGION – LOAD CAPACITANCE (pF)C L 1H-02 PULSE RESPONSE t – TIME (µs) INPUT AND OUTPUT VOLTAGES (V) 12123456789 1 0 1 1 INPUT OUTPUT 1H-03 GND OUT 220ΩINPUT MONITOR 50Ω fP = 100kHz 1H-05 KI LC 150Ω 10k TYPICAL PERFORMANCE CURVES (continued) CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025