The LTC4270/LTC4271 chipset is a 12-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. The LTC4270/LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25Ω sense resistors.Advanced power management features include per-port 12‑bit current monitoring ADCs, DAC-programmable current limit, and versatile fast shut-down of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a 2 second backoff timer. The LTC4270/LTC4271 includes an I2C serial interface operable up to 1MHz.The LTC4270/LTC4271 is available in multiple power grades allowing delivered PD power up to 90W.Applications PoE PSE Switches/Routers PoE PSE Midspans

The LTC4366 surge stopper protects loads from high voltage transients. By controlling the gate of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may remain operational while the overvoltage is dropped across the MOSFET. Placing a resistor in the return line isolates the LTC4366 and allows it to float up with the supply; therefore, the upper limit on the output voltage depends only on the availability of high valued resistors and MOSFET ratings.An adjustable overvoltage timer prevents MOSFET damage during the surge while an additional 9-second timer provides for MOSFET cool down. A shutdown pin reduces the quiescent current to less than 14μA during shutdown. After a fault the LTC4366-1 latches off while the LTC4366-2 will auto-retry.Applications Industrial, Automotive and Avionic Surge Protection High Voltage DC Distribution 28V Vehicle Systems

The LTC5544 is part of a family of high dynamic range, high gain passive downconverting mixers covering the 600MHz to 6GHz frequency range. The LTC5544 is optimized for 4GHz to 6GHz RF applications. The LO frequency must fall within the 4.2GHz to 5.8GHz range for optimum performance. A typical application is a WiMAX receiver with a 5.15GHz to 5.35GHz RF input and low side LO.The LTC5544 is designed for 3.3V operation, however; the IF amplifier can be powered with 5V for the higher P1dB.The LTC5544’s high level of integration minimizes the total solution cost, board space and system-level variation, while providing the highest dynamic range for demanding receiver applications.Applications 5GHz WiMAX/WLAN Receiver 4.9GHz Public Safety Bands 4.9GHz to 6GHz Military Communications Point-to-Point Broadband Communications Radar Systems

The AD8210S is a single-supply, difference amplifier ideal for amplifying small differential voltages in the presence of large common-mode voltages. The operating input common-mode voltage range extends from −2 V to +65 V. The typical supply voltage is 5 V. Excellent ac and dc performance over temperature keep errors in the measurement loop to a minimum. Offset drift and gain drift are guaranteed to a maximum of 8 μV/°C and 20 ppm/°C, respectively.

The AD5592R/AD5592R-1 have eight I/Ox pins (I/O0 to I/O7) that can be independently configured as digital-to-analog converter (DAC) outputs, analog-to-digital converter (ADC) inputs, digital outputs, or digital inputs. When an I/Ox pin is configured as an analog output, it is driven by a 12-bit DAC. The output range of the DAC is 0 V to VREF or 0 V to 2 × VREF. When an I/Ox pin is configured as an analog input, it is connected to a 12-bit ADC via an analog multiplexer. The input range of the ADC is 0 V to VREF or 0 V to 2 × VREF. The ADC has a total throughput rate of 400 kSPS. The I/Ox pins can also be configured as digital, general-purpose input or output (GPIO) pins. The state of the GPIO pins can be set or read back by accessing the GPIO write data register or the GPIO read configuration register, respectively, via a serial peripheral interface (SPI) write or read operation.The AD5592R/AD5592R-1 have an integrated 2.5 V, 20 ppm/°C reference, which is turned off by default, and an integrated temperature indicator, which gives an indication of the die temperature. The temperature value is read back as part of an ADC read sequence.The AD5592R/AD5592R-1 are available in 16-ball, 2 mm × 2 mm WLCSP, 16-lead, 3 mm × 3 mm LFCSP, and 16-lead TSSOP. The AD5592R/AD5592R-1 operate over a temperature range of −40 °C (TA) to +125 °C (TJ).APPLICATIONS Control and monitoring General-purpose analog and digital inputs/outputs

The MAX16970/MAX16971 provide high-ESD and short-circuit protection for the low-voltage internal USB data and USB power line in automotive radio, navigation, connectivity, and USB hub applications. The devices support both Hi-Speed USB (480Mbps) and full-speed USB (12Mbps) operation. In addition, the devices also include integrated circuitry to enable fast-charging for consumer devices adhering to either the Apple method or the Hi-Speed USB host-charger port-detection protocol and support USB On-The-Go (OTG). The short-circuit protection features include short-to-battery on the protected HVBUS, HVD+, and HVD- outputs, as well as short-to-HVBUS on the protected HVD+ and HVD- outputs. The devices are capable of a short-to-battery condition of up to +18V. Short-to-GND and overcurrent protection are also provided on the HVBUS output to protect the internal BUS power rail from overcurrent faults. Each device features high-ESD protection to ±15kV Air Gap method and ±8kV Contact method on all protected HVBUS, HVD+, and HVD- outputs. Each device features two low 4.0Ω on-resistance Hi-Speed USB switches, a current-limited low-voltage 31mΩ BUS switch, and provides an integrated high-voltage external power-switch controller. The BUS switch can start up into large capacitive noncompliant USB loads. The devices also feature an enable input, a fault output, integrated Apple iPhone®/iPad® fast-charging termination resistors, and an integrated host-charger port-detection circuit adhering to the USB 2.0 battery charging specification version 1.2. The devices are available in 16-pin QSOP and 16-pin (4mm × 4mm) TQFN packages and operate over the -40°C to +105°C temperature range. The MAX16970GEEA/V+ and MAX16971GEEA/V+ are drop-in compatible with MAX16969DGEE/V+ and MAX16969BGEE/V+, respectively. ApplicationsAutomotive ConnectivityAutomotive Radio and NavigationTelematicsUSB Hub

The MAX17232/MAX17233 offers dual synchronous step-down DC-DC controllers with integrated MOSFETs. They operates over a 3.5V to 36V input voltage range with 42V input transient protection, and can operate in dropout condition by running at 95% duty cycle. The controllers can generate fixed output voltages of 3.3V/5V, along with the capability to program the output voltage between 1V to 10V.These devices use a current-mode-control architecture.The devices can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.The devices are available in a 28-pin TQFN-EP package with exposed pad, and are specified for operation over -40°C to +85°C.ApplicationsDistributed Supply RegulationGeneral-Purpose Point-of-LoadWall Transformer Regulation

The MAX17290/MAX17292 high-efficiency, synchronous step-up DC-DC controllers operate over a 4.5V to 36V input voltage range with 42V input transient protection. The input operating range can be extended to as low as 2.5V in Bootstrapped mode. The MAX17290 and MAX17292 use a constant-frequency, pulse-width modulating (PWM), peak current-mode control architecture. There are multiple versions of the devices offering one or more of the following functions: a synchronization output (SYNCO) for 180° out-of-phase operation, an overvoltage protection function using a separate input pin (OVP), and a reference input pin (REFIN) to allow on-the-fly output voltage adjustment. The MAX17290 and MAX17292 operate in different frequency ranges. All versions can be synchronized to an external master clock using the FSET/SYNC input. The devices are available in a compact 12-pin (3mm x 3mm) TQFN and 10-pin μMAX packages. Both packages have exposed pads. -40°C to +85°C Operation.ApplicationsDistributed Supply RegulationGeneral-Purpose Point-of-LoadOffline Power SuppliesTelecom Hardware

The Olympus series of ICs are the industry’s smallest and robust integrated system protection solutions. TheMAX17523/MAX17523A adjustable overvoltage and overcurrent protection device is ideal for protecting systems against positive and negative input voltage faults up to ±40V, and feature low 190mΩ (typ) RON integrated FETs.The adjustable overvoltage range in MAX17523 is between 6V and 36V, while the adjustable undervoltage range is between 4.5V and 24V. The adjustable overvoltage range in MAX17523A is between 6V and 36V, while the adjustableundervoltage range is between 4.2V and 24V. The overvoltage-lockout (OVLO) and undervoltage-lockout (UVLO)thresholds are set using optional external resistors. The factory preset internal OVLO threshold is 33V (typ), and thepreset internal UVLO threshold is 19V (typ).The MAX17523/MAX17523A also feature programmable current-limit protection up to 1A. The device can be set for autoretry, latch-off, or continuous fault response when an overcurrent event occurs. Once current reaches the threshold, the MAX17523/MAX17523A turn off after 21ms (typ) blanking time, and stay off during the retry period when set to autoretry mode. The devices latch off after the blanking time when set to latch-off mode. The devices limit the current continuously when set to continuous mode. The MAX17523/MAX17523A also feature reverse current and thermal shutdown protection. The MAX17523 and MAX17523A are available in a small, 16-pin (3mm x 3mm) TQFN package. The MAX17523 operates over the -40°C to +125°C extended temperature range.ApplicationsCondition MonitoringFactory SensorsProcess AnalyticsProcess InstrumentationSensor SystemsWeighing and Batching Systems

The MAX17532 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integratedMOSFETs operates over a 4V to 42V input. The convertercan deliver up to 100mA 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 MAX17532 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 (3mm x 3mm) µMAX® packages. Simulationmodels are available.

The MAX17532 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integratedMOSFETs operates over a 4V to 42V input. The convertercan deliver up to 100mA 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 MAX17532 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 (3mm x 3mm) µMAX® packages. Simulationmodels are available.

The MAX17541G high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integrated MOSFETsoperates over 4.5V to 42V input. The converter candeliver up to 500mA and generates output voltages from0.9V up to 0.92 x VIN. The feedback (FB) voltage is accurateto within ±1.7% over -40°C to +125°C.The MAX17541G uses peak-current-mode control withpulse-width modulation (PWM) and operates with fixed600kHz switching frequency at any load. The deviceis available in a 10-pin (3mm × 2mm) TDFN package.Simulation models are available.ApplicationsBase Station, VOIP, TelecomBattery-Powered EquipmentGeneral-Purpose Point of LoadHome TheatreHVAC and Building ControlIndustrial Process Control

The MAX17543 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integrated MOSFETsoperates over a 4.5V to 42V input. The converter candeliver up to 2.5A and generates output voltages from0.9V up to 0.9 x VIN. The feedback (FB) voltage isaccurate to within ±1.1% over -40°C to +125°C.The MAX17543 uses peak current-mode control. Thedevice can be operated in the pulse-width modulation(PWM), pulse-frequency modulation (PFM), ordiscontinuous conduction mode (DCM) control schemes.The device is available in a 20-pin (4mm × 4mm) TQFNpackage. Simulation models are available.ApplicationsBase Station Power SupplyDistributed Supply RegulationGeneral-Purpose Point-of-LoadHigh-Voltage Single-Board SystemsIndustrial Power Supplies

The MAX17544 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integrated MOSFETsoperates over 4.5V to 42V input. The converter can deliverup to 3.5A and generates output voltages from 0.9V up to0.9 x VIN. The feedback (FB) voltage is accurate to within±1.1% over -40°C to +125°C.The MAX17544 uses peak-current-mode control. Thedevice can be operated in pulse-width modulation (PWM),pulse-frequency modulation (PFM), or discontinuousconduction mode (DCM) control schemes.The device is available in a 20-pin (5mm x 5mm) TQFNpackage. Simulation models are available.ApplicationsBase Station Power SupplyDistributed Supply RegulationGeneral-Purpose Point-of-LoadHigh-Voltage Single-Board SystemsIndustrial Power Supplies

The MAX17545 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integrated MOSFETsoperates over 4.5V to 42V input. The converter can deliverup to 1.7A and generates output voltages from 0.9V up to0.9 x VIN. The feedback (FB) voltage is accurate to within±1.1% over -40°C to +125°C.The MAX17545 uses peak-current-mode control. Thedevice can be operated in pulse-width modulation (PWM),pulse-frequency modulation (PFM), or discontinuousconduction mode (DCM) control schemes.The device is available in a 20-pin (4mm × 4mm) TQFNpackage. Simulation models are available.ApplicationsBase Station Power SupplyDistributed Supply RegulationGeneral-Purpose Point-of-LoadHigh-Voltage Single-Board SystemsIndustrial Power Supplies

The MAX17550 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integratedMOSFETs operates over a 4V to 60V input. The convertercan deliver up to 25mA 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 MAX17550 uses peak-current-mode control. Thedevice can be operated in pulse-width modulation (PWM)or pulse-frequency modulation (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 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 MAX17558 is a dual-output, synchronous step-downcontroller that drives nMOSFETs.The device features a peak-current-mode, constant-frequencyarchitecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase,independent 10A power supplies or as a dual-phase,single-output 20A power supply. The device alsoprovides the ability to run two controllers 180° out-ofphaseto reduce the power loss and noise due to theinput-capacitor ESR.The IC supports current sensing using either an externalcurrent-sense resistor for accuracy or an inductor DCRfor improved system efficiency. Current foldback limitsMOSFET power dissipation under short-circuit conditions.The IC provides independent adjustable soft-start foreach output and can start up monotonically into aprebiased output. The IC can be configured in eitherPWM or DCM modes of operation, depending on whetherconstant-frequency operation or light-load efficiency isdesired.The IC operates over the -40°C to +125°C temperaturerange and is available in a lead(Pb)-free, 32-pin TQFN,5mm x 5mm package with an exposed pad.ApplicationsComputerized Numerical ControlDistributed DC Power SystemsIndustrial Power SuppliesMotion ControlProgrammable Logic Controllers

The MAX17558 is a dual-output, synchronous step-downcontroller that drives nMOSFETs.The device features a peak-current-mode, constant-frequencyarchitecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase,independent 10A power supplies or as a dual-phase,single-output 20A power supply. The device alsoprovides the ability to run two controllers 180° out-ofphaseto reduce the power loss and noise due to theinput-capacitor ESR.The IC supports current sensing using either an externalcurrent-sense resistor for accuracy or an inductor DCRfor improved system efficiency. Current foldback limitsMOSFET power dissipation under short-circuit conditions.The IC provides independent adjustable soft-start foreach output and can start up monotonically into aprebiased output. The IC can be configured in eitherPWM or DCM modes of operation, depending on whetherconstant-frequency operation or light-load efficiency isdesired.The IC operates over the -40°C to +125°C temperaturerange and is available in a lead(Pb)-free, 32-pin TQFN,5mm x 5mm package with an exposed pad.ApplicationsComputerized Numerical ControlDistributed DC Power SystemsIndustrial Power SuppliesMotion ControlProgrammable Logic Controllers

The MAX17561/MAX17562/MAX17563 adjustable overvoltage and overcurrent-protection devices are ideal to protect systems against positive and negative input voltage faults up to ±40V and feature low 100mΩ (typ) RON FETs.The adjustable overvoltage protection range is between 6V and 36V, while the adjustable undervoltage protection range is between 4.5V and 24V. The overvoltage-lockout (OVLO) and undervoltage-lockout (UVLO) thresholds are set using optional external resistors. The factory-preset internal OVLO threshold is 33V (typ) and the preset internal UVLO threshold is 19.2V (typ).The ICs also feature programmable current-limit protection up to 4.2A. Once current reaches the threshold, the MAX17561 turns off after the 20.7ms (typ) blanking time and stays off during the retry period. The MAX17562 latches off after the blanking time, and the MAX17563 limits the current continuously. In addition, these devices feature reverse current and thermal-shutdown protection.The ICs are available in a small 14-pin TSSOP (5mm x 6.5mm) package and are specified over the extended -40°C to +125°C temperature range.How to Add Overvoltage and Overcurrent Protection Using the MAX17561—Part 1How to Add Overvoltage and Overcurrent Protection Using the MAX17561—Part 2ApplicationsBattery-Powered ApplicationsConsumer ElectronicsIndustrial EquipmentMarine Equipment