Supervisory Circuits LTC1536 - Precision Triple Supply Monitor for PCI Applications

Power Management IC Development Tools LT4320IDD-1 3-Phase Ideal Diode Bridge R

Switching Voltage Regulators LTC3824 - High Voltage Step-Down Controller With 40- A Quiescent Current

The MAX696/MAX697 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX696/MAX697 significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components.The MAX696 and MAX697 are supplied in 16-pin packages and perform six functions:A reset output during power-up, power-down, and brownout conditions. The threshold for this 'lowline' reset is adjustable by an external voltage-divider.A reset pulse if the optional watchdog timer has not been toggled within a specified time.Individual outputs for low-line and watchdog fault conditions.The reset time may be left at its default value of 50ms, or may be varied with an external capacitor or clock pulses.A separate 1.3V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than VCC.The MAX696 also has battery-backup switching for CMOS RAM, CMOS microprocessor, or other low-power logic.The MAX697 lacks battery-backup switching, but has write-protection pins (active-low CE IN and active-low CE OUT) for CMOS RAM or EPROM. In addition, it consumes less than 250 microamperes.ApplicationsComputersControllersCritical µP Power MonitoringIntelligent Instruments

The MAX1044 and ICL7660 are monolithic, CMOS switched-capacitor voltage converters that invert, double, divide, or multiply a positive input voltage. They are pin compatible with the industry-standard ICL7660 and LTC1044. Operation is guaranteed from 1.5V to 10V with no external diode over the full temperature range. They deliver 10mA with a 0.5V output drop. The MAX1044 has a BOOST pin that raises the oscillator frequency above the audio band and reduces external capacitor size requirements.The MAX1044/ICL7660 combine low quiescent current and high efficiency. Oscillator control circuitry and four power MOSFET switches are included on-chip. Applications include generating a -5V supply from a +5V logic supply to power analog circuitry. For applications requiring more power, the MAX660 delivers up to 100mA with a voltage drop of less than 0.65V.Applications-5V Supply from +5V Logic SupplyData AcquisitionEIA/TIA-232E and EIA/TIA-562 Power SuppliesHandheld Instruments (PDAs, Palmtops)Op-Amp Power SuppliesPanel MetersPersonal Communications EquipmentPortable Telephones

The ADMC401 is a single-chip DSP-based controller, suitable for high performance control of ac induction motors (ACIM), permanent magnet synchronous motors (PMSM), brushless dc motors (BDCM) and switched reluctance (SR) motors in industrial applications. The ADMC401 integrates a 26 MIPS, fixed-point DSP core with a complete set of motor control peripherals that permits fast motor control in a highly integrated environment.The DSP core of the ADMC401 is the ADSP-2171 which is completely code compatible with the ADSP-21xx DSP family (as well as other members of the integrated motor controllers of the ADMC3xx family) and combines three computational units, data address generators and a program sequencer. The computational units comprise an ALU, a multiplier/accumulator (MAC) and a barrel shifter. The DSP core also adds instructions for bit manipulation, squaring (x2), biased rounding and global interrupt masking. In addition, two flexible double-buffered, bidirectional synchronous serial ports are included in the ADMC401.The ADMC401 provides 2K × 24-bit internal program memory RAM, 2K × 24-bit internal program memory ROM and 1K × 16-bit internal data memory RAM. The program and data memory RAM can be boot loaded through the serial port from either a serial E2PROM, through a UART connection (either from external host microprocessor or from the Motion Control Debugger) or via a synchronous serial interface from a host microprocessor. Alternatively, the internal program and data memory RAM may be booted from an external device across the address and data buses. The program memory ROM includes a monitor that adds software debugging features through the serial port.Additionally, the ADMC401 device adds significant external memory and peripheral expansion capabilities by making available the full address and data bus of the DSP core. This feature permits expansion of both external program and data memory and means that the DSP core can address up to 14K × 24 bits of external program memory and up to 13K × 16 bits of external data memory.The ADMC401 contains a number of special purpose, motor control peripherals. The first is a high performance, 8-channel, 12-bit ADC system with dual channel simultaneous sampling ability across 4 pair of inputs. An internal precision voltage reference is also available as part of the ADC system. In addition, a three-phase, 16-bit, center-based PWM generation unit can be used to produce high-accuracy PWM signals with minimal processor overhead. The ADMC401 also contains a flexible incremental encoder interface unit for position sensor feedback; two adjustable-frequency auxiliary PWM outputs, 12 lines of digital I/O; a 2-channel event capture system; a 16-bit watchdog timer; two 16-bit interval timers (one of which can be linked to the encoder interface unit) and an interrupt controller that manages all peripheral interrupts. Finally, the ADMC401 contains an integrated power-on-reset (POR) circuit that can be used to generate the required reset signal for the device on power-on.

Non-Isolated PoL Module DC DC Converter 1 Output 0.6 ~ 5V - - 6A 4.5V - 28V Input

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 devices are high precision, low power, low noise voltage references featuring ±0.02% B, C, and D grade maximum initial error, excellent temperature stability, and low output noise.This family of voltage references uses an innovative core topology to achieve high accuracy while offering industry-leading temperature stability and noise performance. The low, thermally induced output voltage hysteresis and low long-term output voltage drift of the devices also improve system accuracy overtime and temperature variations.A maximum operating current of 950 μA and a maximum low dropout voltage of 300 mV allow the devices to function very well in portable equipment.The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 series of references are each provided in an 8-lead SOIC and are available in a wide range of output voltages, all of which are specified over the extended industrial temperature range of −40°C to +125°C.APPLICATIONSPrecision data acquisition systemsHigh resolution data convertersHigh precision measurement devicesIndustrial instrumentationMedical devicesAutomotive battery monitoring

The ADuM5010 is an integrated, isolated DC/DC converter.Based on the Analog Devices, Inc., iCoupler® technology, theDC/DC converter provides regulated, isolated power, adjustablebetween 3.15 V and 5.25 V. Input supply voltages can range fromslightly below the required output to significantly higher.The iCoupler chip-scale transformer technology is used for isolated logic signals and for the magnetic components of the DC/DC converter. The result is a small form factor, total isolation solution.APPLICATIONS Power supply startup bias and gate drives Isolated sensor interfaces Industrial PLCs

The LTC6803 is a 2nd generation, complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6803 can measure up to 12 series connected battery cells or supercapacitors. Many LTC6803 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6803-2/LTC6803-4 has an individually addressable serial interface, allowing up to 16 LTC6803-2/LTC6803-4 devices to interface to one control processor and operate simultaneously. Each cell input has an associated MOSFET switch for discharging overcharged cells. The LTC6803-2 connects the bottom of the stack to V– internally. It is pin compatible with the LTC6802-2, providing a drop-in upgrade. The LTC6803-4 separates the bottom of the stack from V–, improving cell 1 measurement accuracy.The LTC6803 provides a standby mode to reduce supply current to 12μA. Furthermore, the LTC6803 can be powered from an isolated supply, providing a technique to reduce battery stack current draw to zero.The related LTC6803-1 and LTC6803-3 offer a serial interface that allows the serial ports of multiple LTC6803-1 or LTC6803-3 devices to be daisy chained without optocouplers or isolators. SPI Interface Isolated V– LTC6802 Pin Compatible LTC6803-1 Daisy Chain No Yes LTC6803-2 Addressable No Yes LTC6803-3 Daisy Chain Yes No LTC6803-4 Addressable Yes No Applications Electric and Hybrid Electric Vehicles High Power Portable Equipment Backup Battery Systems Electric Bicycles, Motorcycles, Scooters