The LTC3290 is a high voltage boost charge pump with a wide 4.5V to 55V input voltage range that can deliver up to 50mA of output current.When the VSET pin is grounded, the LTC3290 operates as a standard boost charge pump, boosting the VOUT output to a maximum of the sum of the VIN and VAUX input supplies. An external resistor divider can be used on the VOUT, FB and GND pins to set the output voltage to any value between 1V and VIN + VAUX with hysteretic Burst?Mode operation.Alternatively, the device can be configured in a VIN tracking mode, in which the VOUT pin regulates at a fixed offset above the VIN pin. The offset voltage is programmed with external resistors, one from the VOUT to the VSET pin and the other from the FB pin to GND. The maximum output voltage is limited to VIN + VAUX.The LTC3290 is available in a thermally enhanced 10-pin MSOP package.Applications High Efficiency General Purpose High Voltage Boost Supplies? High Side N-FET Driver Industrial/Automotive Power Switching? VIN Tracking Supply

The LTC3890-3 is a high performance dual step-down switching regulator DC/DC controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase.The 50?A no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP? compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. A wide 4V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries.Independent TRACK/SS pins for each controller ramp the output voltages during start-up. Current mode control limits the inductor current during short-circuit conditions. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous conduction mode at light loads.For versions with different and/or additional features, see the LTC3890 family summary, Table 1, in the Pin Functions section of this data sheet. LTC3890 LTC3890-1 LTC3890-2 LTC3890-3 Adjustable Current Limit Yes No Yes No CLKOUT/PHASMD for Multiphase Operation Yes No Yes No Number of PGood Outputs 2 1 2 1 OVP ? Bottom Gate Crowbar Yes Yes No No Current Limit Foldback Yes Yes No No Light Load Operation when Synced to External Clock Forced Continuous Forced Continuous Pulse Skipping Pulse Skipping SENSE Pins Common Mode Range Common Mode < 0.5V Requires VFB < 0.65V Common Mode < 0.5V Requires VFB < 0.65V Not Dependant on VFB. Easy to make a non-synchronous Boost or SEPIC Not Dependant on VFB. Easy to make a non-synchronous Boost or SEPIC Package 5X5 QFN-32 SSOP-28 5X5 QFN-32 SSOP-28 Applications Automotive Always-On Systems Battery Operated Digital Devices Distributed DC Power Systems

Demonstration circuit 1852A is a combined step-up and step-down DC/DC converter, using the LTC3536 monolithic synchronous buck-boost regulator in the MSOP package. The DC1852A has wide input voltage range of 1.8V to 5.5V and is capable of delivering up to 1A of output current. The output voltage of the DC1852A can be set as low as 1.8V and can go as high as 5.5V. DC1852A supports two operation modes: fixed-frequency pulse-width modulation (PWM) and Burst Mode® operation.

The LTC3838 is a dual, PolyPhase? synchronous step-down DC/DC switching regulator controller. Two independent channels drive all N-channel power MOSFETs. The controlled on-time, valley current mode control architecture allows for fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load current. Its load-release transient detection feature significantly reduces overshoot at low output voltages.Differential output voltage sensing, along with a precision internal reference, offers an accurate ?0.67% output regulation on Channel 1, even if the remote output ground deviates from local ground by ?500mV. The second channel can either provide an independent ?1% output, or together with the first channel of this controller, serve as one of the PolyPhase channels for a single-output voltage.The switching frequency can be programmed from 200kHz to 2MHz with an external resistor, and can be synchronized to an external clock. Very low tON and tOFF times allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up and multiple safety features are provided.See below for a comparison of LTC3838, LTC3838-1 and LTC3838-2. Part Number Description LTC3838 ? ?0.67% Differential Output Voltage Accuracy Over Temperature on Channel 1, ?1% Output Regulation on Channel 2, Separate Per Channel 30mV to 100mV Current Sense Range Controls LTC3838-1 ? ?0.67% Differential Output Voltage Accuracy Over Temperature on Both Channel 1 and Channel 2, Single Pin 30mV/60mV Current Sense Range Controls LTC3838-2 ?0.67% Differential Output Voltage Accuracy With Internal Reference on Channel 1, ?4mV Differential with External Reference Voltage on Channel 2, Fixed 30mV Current Sense Range Applications Distributed Power Systems Point-of-Load Converters Computing Systems Data Communication Systems

The LTM4681 is a quad 31.25A or single 125A stepdown??Module? (power module) DC/DC regulator featuring?remote configurability and telemetry-monitoring?of power management parameters over PMBus. The?LTM4681 is comprised of digitally programmable analog?control loops, precision mixed-signal circuitry, EEPROM,?power MOSFETs, inductors and supporting components.The LTM4681?s 2-wire serial interface allows outputs?to be margined, tuned and ramped up and down at programmable?slew rates with sequencing delay times. True input current sense, output currents and voltages, output?power, temperatures, uptime and peak values are readable. Custom configuration of the EEPROM contents is not?required. At start-up, output voltages, switching frequency,?and channel phase angle assignments can be set by pinstrapping?resistors. The LTpowerPlay? GUI and DC1613?USB-to-PMBus converter and demo kits are available.?The LTM4681 is offered in a 15mm ? 22mm ? 8.17mm?BGA package available with SnPb or RoHS compliant?terminal finish.APPLICATIONS Multi-Rail Processor Power, Configurable Core Power

DC1819A: Demo Board for the LTC4415 Dual 4A Ideal Diodes with Adjustable Current Limit,

Demonstration circuit 1471 is a monolithic step-down DC/DC switching regulator featuring the LT3990. The switching frequency is adjustable up to 2.2MHz. The demo circuit is designed for 5V, 350mA output from a 6.5V to 62V input. The wide input range of the LT3990 allows a variety of input sources including automotive batteries and 24V industrial supplies. Low ripple Burst Mode increases the efficiency at the light load while keeping the output ripple below 5mV in a typical application. The part is in shutdown when the EN pin is low and active when the pin is high. The threshold of the EN pin is accurate at 1V when VIN is above 4.2V. Adding a resistor divider from VIN to EN can program the LT3990 to regulate the output only when VIN is above a desired voltage. The catch diode and boost diode are integrated to reduce the components count and solution size. The circuit consumes only 2.5μA of quiescent current.

The LT8710 is a synchronous PWM DC/DC controller with a rail-to-rail output current monitor and control. The LT8710 is ideal for many types of power supply topologies and can be easily configured for boost, SEPIC, inverting, or flyback configurations.The LT8710?s rail-to-rail output current monitor and control allows the part to be configured in current limited applications such as battery charging. The FLAG pin can be used as a power good indication or C/10 indication allowing for accurate bulk and float battery voltages.The LT8710?s switching frequency range can be set between 100kHz and 750kHz using an external resistor or synchronized to an external clock.The LT8710 also features innovative EN/FBIN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function. The pin is also used for input voltage regulation to avoid collapsing a high impedance input supply. Additional features such as frequency foldback and soft-start are integrated. The LT8710 is available in a 20-lead TSSOP package.Applications High Power Local Power Supply Wide Input Voltage Range SEPIC/Inverting Lead Acid Battery Charger Automotive Engine Control Unit (ECU) Power Solar Panel Power Converter

Demo Circuit 1467 is a high efficiency, high frequency step-down converter, incorporating the LTC3614 monolithic synchronous regulator. The DC1467A has an input voltage range of 2.25V to 5.5V, and is capable of delivering up to 4A of output current. The output voltage of the DC1467A can be set as low as 0.6V, the reference voltage of the LTC3614. The operating frequency range of the DC1467A is either set to a fixed 2.25 MHz by connecting the frequency pin to SVin, set by an external resistor, or synchronized to an external clock, with a range up to 4 MHz. At low load currents, the DC1467A can operate in either noise sensitive applications, due to the capability of the LTC3614 to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3614 also has Burst-Mode capability. The Burst Mode clamp can be set externally.

The LTC3406B is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages of 1.5V and 1.8V. Supply current with no load is 300?A and drops to <1?A in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406B ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications.Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3406B is available in a low profile (1mm) ThinSOT package. Refer to LTC3406 for applications that require Burst Mode? operation. VOUT FSW Features LTC3406 Adj. 1.5MHz Burst Mode LTC3406-1.2 1.2V 1.5MHz Burst Mode LTC3406-1.5 1.5V 1.5MHz Burst Mode LTC3406-1.8 1.8V 1.5MHz Burst Mode LTC3406B Adj 1.5MHz Burst Mode Disabled LTC3406B-1.2 1.2V 1.5MHz Burst Mode Disabled LTC3406B-2 Adj. 2.25MHz Burst Mode Disabled LTC3406A Adj. 1.5MHz Low Ripple Burst Mode LTC3406AB Adj. 1.5MHz Burst Mode Disabled LTC3406AB-2 Adj. 2.25MHz Burst Mode Disabled Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems Digital Still Cameras MP3 Players Portable Instruments