The MAX17242/MAX17243 high-efficiency, synchronous step-down DC-DC converters with integrated MOSFETs operates over a 3.5V to 36V input voltage range, and can operate in drop-out condition by running at 99% duty cycle. The converters deliver up to 2A (MAX17242) and3A (MAX17243) output current and generate fixed outputvoltages of 3.3V/5V, along with the ability to program theoutput voltage between 1V to 10V.The devices use a current-mode-control architecture andcan be operated in the pulse-width modulation (PWM)or pulse-frequency modulation (PFM) control schemes.PWM operation provides constant frequency operation atall loads, and is useful in applications sensitive to switchingfrequency. PFM operation disables negative inductorcurrent and additionally skips pulses at light loads forhigh-efficiency operation. The low-resistance, on-chipMOSFETs ensure high efficiency at full load and simplifythe layout.The devices are available in a compact 20-pin (5mm x 5mm)TQFN package with exposed pad. These parts are rated for -40°C to +85°C operation.Design Solution: Online Simulator Validates Buck Converter Output Error Budget Analysis ›ApplicationsDistributed Supply RegulationGeneral-Purpose Point-of-LoadWall Transformer Regulation

The MAX17242/MAX17243 high-efficiency, synchronous step-down DC-DC converters with integrated MOSFETs operates over a 3.5V to 36V input voltage range, and can operate in drop-out condition by running at 99% duty cycle. The converters deliver up to 2A (MAX17242) and3A (MAX17243) output current and generate fixed outputvoltages of 3.3V/5V, along with the ability to program theoutput voltage between 1V to 10V.The devices use a current-mode-control architecture andcan be operated in the pulse-width modulation (PWM)or pulse-frequency modulation (PFM) control schemes.PWM operation provides constant frequency operation atall loads, and is useful in applications sensitive to switchingfrequency. PFM operation disables negative inductorcurrent and additionally skips pulses at light loads forhigh-efficiency operation. The low-resistance, on-chipMOSFETs ensure high efficiency at full load and simplifythe layout.The devices are available in a compact 20-pin (5mm x 5mm)TQFN package with exposed pad. These parts are rated for -40°C to +85°C operation.Design Solution: Online Simulator Validates Buck Converter Output Error Budget Analysis ›ApplicationsDistributed Supply RegulationGeneral-Purpose Point-of-LoadWall Transformer Regulation

The MAX17551 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integratedMOSFETs operates over a 4V to 60V input. The convertercan deliver up to 50mA and generates output voltagesfrom 0.8V up to 0.9 x VIN. The feedback (FB) voltage isaccurate to within ±1.75% over -40°C to +125°C.The MAX17551 uses peak-current-mode control and canbe operated in pulse-width modulation (PWM) or pulse-frequencymodulation (PFM) modes.The device is available in a 10-pin (3mm x 2mm) TDFNand 10-pin (5mm x 3mm) µMAX® packages. Simulationmodels are available.ApplicationsBattery-Powered EquipmentHigh-Voltage LDO ReplacementHVAC and Building ControlIndustrial Sensors and Process Control

The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. The device uses a constant-frequency, peak-current-mode architecture.The two outputs can be configured as independent voltage rails. Input capacitor size is minimized by running the two outputs 180° out-of-phase.The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR forimproved system efficiency. Current foldback or latchoff limits MOSFET power dissipation under short-circuit conditions.The IC provides independent adjustable soft-start/stop for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 7mm × 7mm, 32-pin TQFP, package.ApplicationsComputerized Numerical ControlDistributed DC Power SystemsIndustrial Power SuppliesMotion ControlProgrammable Logic Controllers

The MAX40075/MAX40088 are wideband, low-noise, low-input bias current operational amplifiers offering rail-to-rail outputs and single-supply operation down to 2.7V. They draw 2.2mA of quiescent supply current per amplifier when enabled and have ultra-low distortion (0.0002% THD+N), as well as low input voltage-noise density (4.2nV/) and low input current-noise density (0.5fA/). The low input bias current and low noise together with the wide bandwidth suit transimpedance amplifiers and imaging applications.For power conservation, the MAX40075/MAX40088 offer a low-power shutdown mode that reduces supply current to 0.1µA and places the amplifiers outputs into a high impedance state. These amplifiers have outputs which swing rail-to-rail and their input common-mode voltage range includes ground. The MAX40075 is unity-gain stable with a gain-bandwidth product of 10MHz. The MAX40088 is gain-of-5 stable with a gain-bandwidth product of 42MHz.ApplicationsADC BuffersAutomotive Power TrainDAC Output AmplifiersDigital ScalesLow-Noise Microphone/PreamplifiersMedical InstrumentationStrain Gauges/Sensor AmplifiersTransimpedance Amplifiers

The MAX44267 precision, low-noise, low-drift dual operational amplifier offers true-zero output that allows the output to cross zero maximizing the dynamic range of an ADC and increasing resolution. In addition, the input common-mode range extends from +13.5V down to -12V. The MAX44267 integrates charge-pump circuitry that generates the negative voltage rail in conjunction with external capacitors. This allows the amplifier to operate from a single +4.5V to +15V power supply, but it is as effective as a normal dual-rail ±4.5V to ±15V amplifier. The architecture eliminates the need for a negative power-supply rail, saving system cost and size.The MAX44267 is unity-gain stable with a gain-bandwidth product of 5MHz. The device features low offset voltage of 50µV (max), drift of 0.4µV/°C (max), and 200nVP-P noise from 0.1Hz to 10Hz. The low offset and noise specifications and wide input common-mode range make the device ideal for sensor transmitters and interfaces. Varying the external charge pump capacitors enables the charge-pump noise to be minimized.The MAX44267 is part of a family of signal chain ICs including amplifiers, multiplexers and ADCs. These ICs eliminate the need for a negative supply to the multiplexer, amplifier and ADC, saving space and cost. See the Typical Application Circuit and Table 1 for more information.The MAX44267 is available in a 14-pin TSSOP package and is specified over the -40°C to +125°C operating temperature range.ApplicationsAnalog Level Shifting/ConditioningBridge SensorsPLC Analog I/O ModulesPressure SensorsSensor Interfaces

The Himalaya series of voltage regulator ICs and powermodules enable cooler, smaller, and simpler power-supplysolutions. The MAXM17532 is a high-efficiency,synchronous, step-down DC-DC power module with integratedcontroller, MOSFETs, compensation components,and inductor that operates over a wide input-voltagerange. The module operates from 4V to 42V input anddelivers up to 100mA output current over a programmableoutput voltage from 0.9V to 5.5V. The module significantlyreduces design complexity, manufacturing risks and offersa true “plug and play” power supply solution, reducing thetime-to-market.The MAXM17532 employs peak-current-mode controlarchitecture. To reduce input inrush current, the deviceoffers a soft-start feature including the default soft-starttime of 5.1ms.The MAXM17532 is available in a low profile, compact10-pin 2.6mm x 3mm x 1.5mm uSLIC™ package.Design Solution: Pack More Power Than Ever in Your Small Sensor ›Sample now!Watch video ›Download white paper ›Also see: Himalaya uSLIC Power ModulesApplications4mA to 20mA Current-Loop Powered SensorsBattery-Powered EquipmentHVAC and Building ControlIndustrial Sensors and EncodersLDO Replacement

The MAX148/MAX149 10-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidthtrack/hold, and serial interface with high conversion speed and low power consumption. They operate from a single +2.7V to +5.25V supply, and sample to 133ksps. Both devices’ analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.The 4-wire serial interface connects directly to SPI/QSPI™ and MICROWIRE™ devices without external logic. A serial-strobe output allows direct connection to TMS320-family digital signal processors. The MAX148/MAX149 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.The MAX149 has an internal 2.5V reference, while the MAX148 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range.These devices provide a hard-wired active-low SHDN pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX148/MAX149, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates.The MAX148/MAX149 are available in 20-pin PDIP and 20-pin SSOP packages.For 4-channel versions of these devices, see the MAX1248/MAX1249 data sheet.ApplicationsBattery-Powered InstrumentsData AcquisitionMedical InstrumentsPen DigitizersPortable Data LoggingProcess Control

The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch WLCSP pack-ages and utilizes the smallest footprint solution to meet a variety of portable applications.

The MAX17498A/MAX17498B/MAX17498C devices are current-mode fixed-frequency flyback/boost converters with a minimum number of external components. They contain all the control circuitry required to design wide input voltage isolated and nonisolated power supplies. The MAX17498A has its rising/falling undervoltage lockout (UVLO) thresholds optimized for universal offline (85V AC to 265V AC) applications, while the MAX17498B/MAX17498C support UVLO thresholds suitable to low-voltage DC-DC applications.The switching frequency of the MAX17498A/MAX17498C is 250kHz, while that of the MAX17498B is 500kHz. These frequencies allow the use of tiny magnetic and filter components, resulting in compact, cost-effective power supplies. An EN/UVLO input allows the user to start the power supply precisely at the desired input voltage, while also functioning as an on/off pin. The OVI pin enables implementation of an input overvoltage-protection scheme that ensures that the converter shuts down when the DC input voltage exceeds the desired maximum value.The devices incorporate a flexible error amplifier and an accurate reference voltage (REF) to enable the end user to regulate both positive and negative outputs. Programmable current limit allows proper sizing and protection of the primary switching FET. The devices support a maximum duty cycle greater than 92% and provide programmable slope compensation to allow optimization of control loop performance. The devices provide an open-drain PGOOD pin that serves as a power-good indicator and enters the high-impedance state to indicate that the flyback/boost converter is in regulation. An SS pin allows programmable soft-start time for the flyback/boost converter. Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation under overcurrent and overtemperature fault conditions. The devices are available in a space-saving, 16-pin (3mm x 3mm) TQFN package with 0.5mm lead spacing.ApplicationsFront-End AC/DC Power Supplies for Industrial Applications (Isolated and Nonisolated)Telecom Power SuppliesWide Input Range DC Input Flyback/Boost Industrial Power Supplies