Analog Devices Inc./Maxim Integrated

The LTC1863L/LTC1867L are pin compatible, 8-channel 12-/16-bit A/D converters with serial I/O and an internal reference.The 8-channel input multiplexer can be configured for either single-ended or differential inputs and unipolar or bipolar conversions (or combinations thereof). The ADCs convert 0V to 2.5V unipolar inputs or ±1.25V bipolar inputs. The ADCs typically draw only 750µA from a single 2.7V supply. The automatic nap and sleep modes benefit power sensitive applications.The LTC1867L's DC performance is outstanding with a ±3LSB INL specification and 16-bit no missing codes over temperature.Housed in a compact, narrow 16-pin SSOP package, the LTC1863L/LTC1867L can be used in space-sensitive as well as low power applications.APPLICATIONSIndustrial Process ControlHigh Speed Data AcquisitionBattery Operated SystemsMultiplexed Data Acquisition SystemsImaging Systems

The LTC1871-1 is a wide input range, current mode, boost, flyback or SEPIC controller that drives an Nchannel power MOSFET and requires very few external components. It eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency. Higher output voltage applications are possible with the LTC1871-1 by connecting the SENSE pin to a resistor in the source of the power MOSFET.The IC’s operating frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin.The LTC1871-1 differs from the LTC1871 by having a lower pulse skip threshold, making it ideal for applications requiring constant frequency operation at light loads. The lower pulse skip threshold also helps maintain constant frequency operation in applications with a wide input voltage range. For applications requiring primary-to-secondary side isolation, please refer to the LTC1871 datasheet.The LTC1871-1 is available in the 10-lead MSOP package.Vin RangeINTVccFeaturesLTC18712.5V to 36V5.2V-LTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power SuppliesPortable Electronic Equipment

The LTC1871-1 is a wide input range, current mode, boost, flyback or SEPIC controller that drives an Nchannel power MOSFET and requires very few external components. It eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency. Higher output voltage applications are possible with the LTC1871-1 by connecting the SENSE pin to a resistor in the source of the power MOSFET.The IC’s operating frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin.The LTC1871-1 differs from the LTC1871 by having a lower pulse skip threshold, making it ideal for applications requiring constant frequency operation at light loads. The lower pulse skip threshold also helps maintain constant frequency operation in applications with a wide input voltage range. For applications requiring primary-to-secondary side isolation, please refer to the LTC1871 datasheet.The LTC1871-1 is available in the 10-lead MSOP package.Vin RangeINTVccFeaturesLTC18712.5V to 36V5.2V-LTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power SuppliesPortable Electronic Equipment

The LTC1871-7 is a current mode, boost, flyback and SEPIC controller optimized for driving 6V-rated MOSFETs in high voltage applications. The LTC1871-7 works equally well in low or high power applications and requires few components to provide a complete power supply solution. The switching frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 6V and a low shutdown quiescent current of 10µA make the LTC1871-7 well suited for battery-operated systems. For applications requiring constant frequency operation, Burst Mode operation can be defeated using the MODE/SYNC pin. The LTC1871-7 is available in the 10-lead MSOP package.VINRangeINTVCCFeaturesLTC18712.5V to 36V5.2V-LTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power Supplies42V Automotive Systems24V Industrial ControlsIP Phone Power Supplies

LTC1871X is a wide input range, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET. LTC1871X is rated to 175°C junction temperature and is 100% tested at 175°C. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency.The IC’s operating frequency can be set with an external resistor over a 65kHz to 900kHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 2.5V and a low shutdown quiescent current of 10μA make the LTC1871X ideally suited for battery-operated systems.For applications requiring constant frequency operation, Burst Mode operation can be defeated using the MODE/SYNC pin. Higher output voltage boost, SEPIC and flyback applications are possible with the LTC1871X by connecting the SENSE pin to a resistor in the source of the power MOSFET. The LTC1871X is available in the 10-lead MSOP package.VINRangeINTVCCFeaturesLTC18712.5V to 36V5.2VLTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power SuppliesPortable Electronic Equipment

The LTC1872B is a constant frequency current mode step-up DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1872B when the input voltage falls below 2.0V.The LTC1872B provides a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. In shutdown, the device draws a mere 8µA.High constant operating frequency of 550kHz allows the use of a small external inductor. The constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide load current range.The LTC1872B is available in a 6-lead low profile (1mm) ThinSOT package. For a Burst Mode operation enabled version of the LTC1872B, please refer to the LTC1872 data sheet.Burst ModeLTC1872YesLTC1872BNoApplicationsOptical CommunicationsLithium-Ion-Powered ApplicationsCellular TelephonesWireless DevicesPortable ComputersScanners

The LTC1875 is a high efficiency 1.5A monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15µA with no load and drops to <1µA in shutdown. The input supply voltage range of 2.65V to 6V makes the LTC1875 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.The switching frequency is internally set to 550kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC1875 can be externally synchronized from 350kHz to 750kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low.The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with a 0.8V feedback reference voltage. The LTC1875 is available in a 16-lead SSOP package.ApplicationsPortable ComputersPortable InstrumentsWireless Modems