CAT102 ONSEMI | Alldatasheet
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Technical content
Characteristics subject to change without notice Precision, Adjustable Shunt Regulator (600 mV Reference)
FEATURES
600 mV low voltage reference ±6 mV initial accuracy High PSRR: 45 dB at 300 kHz Better line regulation: 1 mV (VIN from 2.2 V to 18 V) Low supply current: 90 µA Open drain output Directly drives optocouplers Industrial temperature range of -40ºC to 85ºC RoHS-compliant 5-lead TSOT23 package APPLICATION SMPS control loop Low temperature coefficient voltage reference Power management Replaces zener diodes Isolated DC-to-DC converters Network, telecom and cellular base station Adjustable voltage reference
DESCRIPTION
The CAT102 is a low-voltage reference and amplifier. Designed for the control loop of low-voltage power supplies, the reference voltage has been designed for 600 mV. Over a temperature from -40°C to 85°C, the reference voltage is within 8 mV of the nominal 600mV. In addition, the error amplifier output and the supply voltage pin (IN) are on separate pins. Power supply rejection is a high 45 dB at 300 kHz. The output, OUT, can sink 20 mA at a maximum saturation voltage of 250 mV. When combined with an optocoupler, the CAT102 can be used as an error amplifier that controls the feedback loop in isolated low-output voltage switching power supplies. For Ordering Information details, see page 7. FUNCTIONAL DIAGRAM PIN CONFIGURATION TSOT-23 5L Top View FB 1 1 5 8 IN GND 2 2 OUT 4 3 4 5 NC PIN DESCRIPTION Pin Name Function FB Inverting input to error amplifier GND Ground OUT Output of error amplifier. Source & sink current capability is 20 mA. NC No connection IN Positive supply OUT FB IN VREF 600mV Error Amplifier GND
Characteristics subject to change without notice ABSOLUTE MAXIMUM RATINGS (1) Parameters Ratings Units VIN Voltage 20 V OUT Voltage 20 V FB Voltage 20 V VIN, OUT, FB Current 50 mA Operating Junction Temperature (10 seconds) 150 ºC Lead Soldering Temperature (10 seconds) 260 ºC Storage Temperature Range -65 to +150 ºC
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over the full operating temperature range of -40°C to +85°C unless otherwise specified. Ambient temperat ure must be de-rated based upon power dissipation and package thermal characteristics.1 Unless otherwise stated, test conditions are VIN = 3 V, FB = OUT, IOUT = 1 mA. Symbol Parameter Conditions Min Typ Max Units VIN Supply Voltage Range 2.2 18 V IIN Quiescent Supply Current V OUT =1 V 90 500 µA TJ = 25ºC 594 600 606 VFB FB Threshold Reference Voltage -40ºC < TJ < 85ºC 592 608 mV Line Regulation VIN = 2.2 V to VIN =18 V VOUT = 0.6 V 0.5 1 mV Load Regulation IOUT = 1 mA to 10 mA VOUT = 0.6 V 3 8 mV IFB FB Input Current -500 500 nA PSRR (3) Reference Power Supply Rejection Frequency = 300 kHz 35 65 dB AV Error Amplifier Open Loop Gain I OUT = 2 mA, VOUT = 1 V 60 80 dB BW (3) Unity Gain Frequency I OUT = 2 mA, VOUT = 1 V 1 2 MHz VOUT Output Saturation voltage I OUT = 20 mA, VFB = HIGH 130 250 mV TRANSC (3) Output Transconductance I OUT = 1 mA to 20 mA 2.5 mA/mV ILEAK Output Leakage Current V OUT = 16 V, VFB = 0 0.5 2 µA IOUT(MAX) Maximum Output Current V OUT = 0.3 V 20 mA Notes: (1) These are stress ratings only and functi onal operation is not implied. Exposure to absolute maximum ra tings for prolongued tim e periods may affect device reliability. All voltages are with respect to ground. (2) Thermal Characteristics ( ΘJA) of TSOT-23 5-lead: 255°C/W (3) This parameter is controlled by design and verifi ed during product evaluation. It is not production tested.
Characteristics subject to change without notice TYPICAL PERFORMANCE CHARACTERISTICS 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 2 6 10 14 18 1 5 10 15 20 Supply Voltage (V) Load Current (mA) Load RegulationLine Regulation (at 1mA) -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 0.1 1 10 100 1000 10000 100000 Power-Supply Rejection Ratio vs. Frequency )zH(ycneuqerF Output Voltage Change (mV) PSRR (dB) Output Voltage Change (mV) Supply current vs. Input Voltage 0 5 10 15 20 Input Voltage (V) Supply Current (µA) -10 110 0.01 0.1 1 10 100 1000 10000 Frequency (kHz) Gain vs. Frequency Gain (dB) Reference Voltage 570 580 590 600 610 620 630 -40 0 40 80 120 Junction Temperature (ºC) Reference Voltage (mV)
Figure 2. Opto-Feedback Application Circuit
Characteristics subject to change without notice θ E1 E e b D c A TOP VIEW SIDE VIEW END VIEW L SYMBOL MIN NOM MAX A1 . 0 0 A1 0.01 0.05 0.10 A2 0.80 0.87 0.90 b0 . 3 0 0 . 4 5 c 0.12 0.15 0.20 D 2.90 BSC E 2.80 BSC E1 1.60 BSC e0 . 9 5 T Y P L 0.30 0.40 0.50 L1 0.60 REF L2 0.25 BSC θ 0º 8º PACKAGE OUTLINE DRAWING TSOT-23 5-Lead (TD) (1) Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-193.
Characteristics subject to change without notice EXAMPLE OF ORDERING INFORMATION 1 ORDERING PART NUMBER CAT102TDI-G Notes: (1) All packages are RoHS-comp liant (Lead-free, Halogen-free) (2) The device used in the above example is a CAT102TDI-GT3 (TSOT-23, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/Reel) Prefix Device # Suffix CAT 102 TD I - G T3 Company ID Package TD: TSOT-23 Temperature Range I = Industrial (-40°C to 85°C) Product Number 102 Tape & Reel T: Tape & Reel 3: 3,000/Reel Lead Finish G: NiPdAu (PPF)
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REVISION HISTORY
Date Rev. Description 29-Jan-07 M Added Ordering Information 16-Jun-07 N Changed package from SOT-23 to TSOT-23 Updated Features Updated Functional Diagram Updated Electrical Characteristics Updated Typical Performance Characteristics Changed termination from SnPb to NiPdAu Added MD- to document Number 19-Nov-08 O Change logo and fine print to ON Semiconductor 05-Feb-09 P Updated Electrical Characteristics Table