28V Dual Tracking Bipolar Supply with Outputs from ±5V to ±25V

The LTC3260 is a low noise dual polarity output power supply that includes an inverting charge pump with both positive and negative LDO regulators. The charge pump operates over a wide 4.5V to 32V input range and can deliver up to 100mA of output current. Each LDO regulator can provide up to 50mA of output current. The negative LDO post regulator is powered from the charge pump output. The LDO output voltages can be adjusted using external resistor dividers.

Low Noise ±12V Power Supply from a Single-Ended 15V Input Supply

The LTC3260 is a low noise dual polarity output power supply that includes an inverting charge pump with both positive and negative LDO regulators. The charge pump operates over a wide 4.5V to 32V input range and can deliver up to 100mA of output current. Each LDO regulator can provide up to 50mA of output current. The negative LDO post regulator is powered from the charge pump output. The LDO output voltages can be adjusted using external resistor dividers.

±5A, 2.5V (2-Quadrant) μModule Voltage Regulator

The LTM8052 is a 36VIN, 5A, 2-quadrant constant-voltage, constant-current (CVCC) step-down μModule® regulator. Included in the package are the switching controller, power switches, inductor and support components. Operating over an input voltage range of 6V to 36V, the LTM8052 supports an output voltage range of 1.2V to 24V. The LTM8052 is able to sink or source current to maintain voltage regulation up to the positive and negative current limits.

725V DC Isolated Low Noise μModule Regulator

The LTM8047 is an isolated flyback μModule DC/DC converter. The LTM8047 has an isolation rating of 725VDC. Included in the package are the switching controller, power switches, transformer, and all support components. Operating over an input voltage range of 3.1V to 32V, the LTM8047 supports an output voltage range of 2.5V to 12V, set by a single resistor.

Industrial 12V 1MHz Regulator with Custom Input Undervoltage Lockout Thresholds

The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter. Its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications. A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below or even equal to the output voltage and ensures seamless transitions between operational modes.

3.1V - 30Vin to Isolated 5V@300mA

Designing with the LTM8047 and LTM8048 is easy. This circuit shows a complete LTM8048-based isolated power supply, requiring only the addition of capacitors for input, output, and biasing, and a resistor to set the output voltage.

48V to 10.8V at 10A Buck Converter Charger for 3-Series LiFePO4 Battery Pack

Building a complete charging system with the LTC4000 and a DC/DC converter is nearly as easy as using a dedicated charger IC. Figure 5 shows the LTC4000 controlling an LT3845A buck converter in a charger designed for a 3S LiFePO4 battery pack (3S refers to three cells in a series configuration). The LT3845A buck converter is chosen here for its simplicity and high, 60V input voltage capability.

12Vin to 5V@25A Using Very Low DCR Current Sense

The LTC3866 is especially well suited to low voltage, high current supplies because of a unique architecture that enhances the signal-to-noise ratio of the current sense circuit. This allows it to operate with the small sense signals produced by very low DCR, 1mΩ or less, inductors, which are used to improve power efficiency in high current supplies. The improved SNR minimizes jitter due to the switching noise, which could corrupt the signal. The LTC3866 can sense a DCR value as low as 0.2mΩ with careful PCB layout.

4.5V to 14Vin, 3.3V@25A Vout Switches at 2MHz

A 2MHz, 3.3V/25A step-down converter. The LTC3838/LTC3839 can operate at switching frequencies above the AM radio band (fSW > 1.8MHz). The high switching frequency permits the use of inductors of very small footprint, so that the entire circuit can fit within a 0.9in2 area with both sides populated. The peak efficiency is 95%, and full load efficiency well above 90% at 25A, even at a frequency of 2MHz.

4.5V to 38Vin, 1.2/15A, 1.5V/15A Dual Output, 350MHz Step-Down Converter

4.5V to 38V input, 1.2/15A, 1.5V/15A dual output, 350MHz step-down converter. With the output sensed directly through a resistor divider network, the remote sensing scheme in Channel 1 mimics the traditional feedback used in Channel 2. This novel remote sensing scheme eliminates the diff amp output pin required in other parts.

15–58VIN to 33.3V 3A LED Automotive Headlight Driver with Up to 98.5% Efficiency

Airplanes and big trucks with 24V batteries need powerful,
efficient and robust headlights and spotlights. This circuit shows a 33.3V, 3A (nine Luminus SSR-90 LEDs) buck-boost LED driver that runs from 15V to 58V input with up to 98.5% efficiency. The 4-switch synchronous topology drives high power LEDs with minimal switch power loss (and minimal temperature rise).

36VIN, 5.6A Two 2.5V Series Supercapacitor Charger

The LTM8026 is a 36VIN, 5A constant-voltage, constant current (CVCC) step-down μModule regulator. Included in the package are the switching controller, power switches, inductor and support components. Operating over an input voltage range of 6V to 36V, the LTM8026 supports an output voltage range of 1.2V to 24V. CVCC operation allows the LTM8026 to accurately regulate its output current up to 5A over the entire output range. The output current can be set by a control voltage, a single resistor or a thermistor. Only resistors to set the output voltage and frequency and the bulk input and output filter capacitors are needed to finish the design.

6-12Vin to ±5V@50mA Split Supply

An easy-to-implement split-voltage power supply using the LTC3388 yields a low quiescent current, high efficiency solution for powering low current analog circuits that need a virtual ground output. The output voltage of each device is digitally programmable to four output voltages from 1.2V to 5.0V and will support a load current up to 50mA. Each regulator requires only four external capacitors and one inductor, covering minimal board real estate.

Dual Output ±32V@5mA Converter

The LT1945 is a dual micropower DC/DC converter in a 10-pin MSOP package. Each converter is designed with a 350mA current limit and an input voltage range of 1.2V to 15V, making the LT1945 ideal for a wide variety of applications. Both converters feature a quiescent current of only 20μA at no load, which further reduces to 0.5μA in shutdown. A current limited, fi xed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current.

5V to ±12V@320mA Dual Supply Boost/Inverting Converter

The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifi ers that can sense to ground providing boost and inverting capability. The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint. The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost and low profi le inductors and capacitors.