Circuits
DC/DC Regulation
DDR Memory Termination
Circuits
Power Management
Switching Regulator
DDR Memory/Bus Termination
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Switching Regulator
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–3.3V Negative Converter with 1A Output Current Limit +15V and -8V Boost and Inverting CCD Bias +15V and -8V Low Vin (2.7V to 5V Vin) CCD Bias +24V and -16V LCD Bias ±5A, 2.5V (2-Quadrant) μModule Voltage Regulator 120W, 24V 5A Output Buck-Boost Voltage Regulator 12V Output Converter Accepts 4V to 80V Input (5.5V Minimum to Start) 12V-24Vin to 5Vout @ 1.4A Monolithic Isolated Flyback Converter (No Opto or Third Winding) 12V-24Vin to 5Vout @ 350mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 12V-24Vin to Four Output 12V @ 120mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 12V/5A Output From 4V-38V Automotive Input Supply 12Vin to 5V@25A Using Very Low DCR Current Sense 13V-30Vin to +/-5V @ 500mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 2 AA Cells Provide CCD Positive and Negative Supply and Three White LED Backlight LED Driver 2-Phase, Spread Spectrum, DDR Memory Supplies with Ceramic Output Capacitors 2.5V to 36V Input, 12V/1A Output SEPIC Converter (Automotive 12V Regulator) 2.65V at 1.2A Output Super Cap Charging Circuit from 7.5V to 36V Input 2.7V to 4.2V to -5V at 90mA and 4.6V at 100mA AMOLED Power Supply 20-36Vin to 12Vout @ 16A 2-Phase Low Noise EN55022B Compliant uModule Power Supply 20A Super Capacitor Charger with 5V Regulated Output from 10V to 36V Input 24Vin to 1.2Vout@15A Using Inductor DCR Sensing to Minimize Solution Size and Cost 24Vin to 5Vout @ 0.7A Monolithic Isolated Flyback Converter (No Opto or Third Winding) 24Vin to 5Vout @ 400mA Low Noise Slew Rate Controlled Step-Down Supply 28V Input to 0V to 28V Output SEPIC SuperCap Charger with Input Current Limit 3.3V to 5.5V input (500mA max) charging 4.4mF super cap (3.3V at 800mA) and providing 1.8V at 400mA 3.3V to 50V Low Noise APD Bias Supply With Ultrafast Current Monitor Transient Speed 3.3V to 70V Low Noise APD Bias Power Supply with Fast Current Monitor Response 3.3V/10mA Regulator from a 4mA to 20mA Loop 36V-72Vin to 12Vout @ 2A Output, Isolated Telecom Supply (No Opto or Third Winding) 36VIN, 5.6A Two 2.5V Series Supercapacitor Charger 4.3V to 42Vin 3.3V@5A Step-Down Converter 4.5 - 28Vin to 2.5Vout @ 6A Ultra Low Noise uModule Power Supply 4.5V to 14Vin, 3.3V@25A Vout Switches at 2MHz 4.5V to 38Vin, 1.2/15A, 1.5V/15A Dual Output, 350MHz Step-Down Converter 48Vin to +/-15Vout @ 100mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 48Vin to +/-15Vout @ 50mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 48Vin to 12Vout @ 200mA Monolithic Isolated Flyback Controller (No Opto or Third Winding) 48Vin to 5Vout @ 0.3A Monolithic Isolated Flyback Converter (No Opto or Third Winding) 4V to 18V (Cold Crank) Input to 12V Output 3mm Maximum Height All Ceramic SEPIC 4V-60V (Cold Crank) Input to 5V Output DC/DC Automotive Converter 5 Output Regulator For TFT-LCD Panels: 5V@0.5A, 22V@20mA, -10V@20mA, 3.3V@0.5A, 8V@80mA 5.1V, –10V, 15V Triple Output TFT-LCD Supply 5.1V, 15V, -5V Triple Output TFT-LCD Supply 5V at 6mA for 9.6s Supercapacitor Backup Supply 5V Backup Supply from Supercap Runs Down to VIN = 2V with 250mA Load 5V to ±12V@320mA Dual Supply Boost/Inverting Converter 5V to ±12V@550mA Split Supply at 1.5MHz 5V to ±12V@80mA Split Supply 5V to 50V Low Noise APD Bias Power Supply with Temperature Compensation 5V to 69V Low Noise APD Bias Supply with Soft-Start 5V to 85V Low Noise APD Bias Power Supply 5V, 2A Output from Automotive Input with Continuous Operation from 6V to 45V 5V, 2A Output from Automotive Input with Continuous Operation from 6V to 45V 5Vin to +/- 12Vout @ 40mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) 6-12Vin to ±5V@50mA Split Supply 725V DC Isolated Low Noise μModule Regulator 7V, 50mW OLED Driver from a 2V to 5.5V input 9-24Vin to 1.8Vout @ 1A Low EMI uModule Power Supply 9V-30Vin to +/-5Vout @ 350mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) Automotive 5V Regulator with Cold Crank Capability Automotive 9V - 19.5Vin to 5V at 1A with 60V Transient Protection and 1.7MHz Switching Frequency Basic 2A, 4-Cell Li-Ion Battery Charger with C/10 Termination Bi-Directional Buck-Boost Supercapacitor Backup Supply Buck Regulator with LDO Post Regulation For Low Noise and Ripple Buck-Boost Converter In SuperCap Backup Power Supply CCD Bias Supply (15V, -8V) Complete Power Solution For Portable Cameras DDR Memory Power Supply: 2.5V to 5.5Vin, 0.75V@+/-6A Vtt, 0.75V@10mA Vref, 1MHz External Clock DDR Memory Power Supply: 2.5V to 5.5Vin, 1.25V@+/-6A Vtt, 1.25V@10mA Vref, 2.25MHz DDR Memory Power Supply: 3.3Vin, 0.9V@+/-3A Vtt (with 1.8V external reference) DDR Memory Power Supply: 3.3Vin, 0.9V@+/-3A Vtt, 1.8V@3A Vddq, 0.9V@10mA Vref DDR Memory Power Supply: 3.3Vin, 1.5V@+/-3A Vtt (2.5V external reference) DDR Memory Power Supply: 3.6V to 15Vin, 1.8V@3A Vddq, 0.9V@+/-3A Vtt, 0.9V@10mA Vref DDR Memory Power Supply: 3.6V to 15Vin, VTT Powered from VDDQ DDR Memory Power Supply: 4V to 24Vin, 1.25V@+/-10A Vtt (2.5V external reference) DDR Memory Power Supply: 5V to 28Vin, 1.5V@+/-10A Vtt (3V external reference) DDR Memory Power Supply: 5Vin, 1.25V@+/-6A Vtt (2.5V external reference) DDR3 1.5V VDDQ/20A 0.75VTT/±10A 4.5V to 14V Input Driver For CCD Imager and an OLED Display Panel With Soft Start Dual Output (+12V@20mA, -20V@10mA) Converter Dual Output ±32V@5mA Converter Dual Super Cap Charging Circuit from 12V with Balance Voltage Charging Control Circuit Energy Harvesting Converter Operates from a Variety of Weak Sources Four Output (-6.5V@500uA, 20V@500uA, 10V@2mA, 5 LED) Supply For Color LCD Displays High Efficiency Wide Input (Cold Crank) Range Dual 5V/8.5V Converter Industrial 12V 1MHz Regulator with Custom Input Undervoltage Lockout Thresholds LCD Bias (+5V, -7.5V, +12.5V) Plus 8 LED Power Supply Li-Ion CCD Bias Supply (15V, -8V) Li-Ion Powered Driver For 6 White LEDs and OLED Display Li-Ion Powered Driver For 6 White LEDs and OLED With Output Disconnect Li-Ion Powered Supply for CCD Imager and Five White Backlight LEDs Li-Ion to +5V@25mA, +16V@1mA, –13V@1mA TFT LCD Power Supply + 10 White LEDs Li-Ion to 10 White LEDs and LCD Bias (+/-8V) with Output Disconnect Li-Ion to 8 White LEDs and +/-15V TFT LCD Bias Supply Li-Ion to Six White LEDs and OLED/LCD Bias Li-Ion to Two White LEDs and OLED/LCD Bias Low Noise Low Ripple Triple Output Supply Providing 1V, 8A and 1.8V, 5A and 1.5V, 3A LTM4620 Dual 13A Regulator OLED Driver: 7V@350mA, -7V@250mA Peak Power Tracking Buck Solar Charger Maximizes Efficiency Piezoelectric Energy Harvester and 1.2V Secondary Rail Programmable Switching 1.5A Current Source Quad Output TFT-LCD Power Supply: 12.2V@500mA, 3.3V@2A, 35V@30mA, -5.5V@50mA Royer Topology Achieves 100μVp-p Noise at 250V Output Single Supercap Charger from 3.3V Input to 2.5V Output Single Supercapacitor Charger from 1.8V to 5.5V Input to 5V Output (1000mA Max Input Current) Six Output DC/DC μModule Regulator From 3V to 72V Input Solar Powered Converter Extends Battery Life in Low Power 3V Primary Battery Applications Solar Powered Converter with MPPC Charges Storage Capacitor Solar-Powered 2.2V Supply and 1.8V LDO with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage Solar-Powered 2.2V Supply with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage Stacked Supercap Charger from 2.5V to 5V Input to 4.5V Output Stacked Supercapacitor Charger from 1.8V to 5.5V Input to 5V Output (1000mA Max Input Current) SuperCap Backup Power Supercap Charger Plus a 5V at 4A DC/DC Buck Converter from 5.5V to 30V Input Supercap Powered Backup Supply Supercap-Based Power Ride-Through Circuit Maximizes Run Time Using an Energy Scavenging Scheme Supercapacitor Energy Storage System for Data Backup TFT Bias (5V@40mA, 10V@2mA, -10V@2mA) and White LED Backlight Supply From Single Li-Ion Cell TFT-LCD Bias Generator: 10V, 24V, -6V Output TFT-LCD Bias Generator: 12V, 20V, -6V Output Triple Output Power Supply (5V, 15V, -10V) for LCD Displays Two Farad, 5V SuperCap charger from a 3.3V input Ultralow-EMI, 96W, Step-Down μModule Regulator— EN55022 Class B Certified in a 15mm x 15mm Footprint Universal Input 48W PFC Application USB-GSM application with 5V USB input (500mA max) charging a 4.4mF super cap (3.4V at 800mA) and providing 1.8V at 400mA USB, FireWire, Automotive and Unregulated Wall Adapter to Regulated 5V VFD (Vacuum Fluorescent Display) and Filament Power Supply VFD (Vacuum Fluorescent Display) and Filament Power Supply VFD (Vacuum Fluorescent Display) Flyback Power Supply Wide Input Range, 3.3V SEPIC Converter Can Operate from 3V to 36V (Cold Crank)
DDR Memory Power Supply: 3.3Vin, 0.9V@+/-3A Vtt (with 1.8V external reference)
Many DDR termination applications require the bus termination voltage to be stepped down from a higher system voltage while tracking one-half of a reference voltage. This option is allowable in most systems since a reference voltage is typically available. This circuit shows a solution for a 3.3V to 0.9V, ±3A termination supply with a 1.8V external reference. Stepping down from a higher system voltage has the advantage of reducing the resistive losses due to the internal power switches, thus improving efficiency.