Analog Devices Inc./Maxim Integrated

The MAX17682 is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 10W. The device operates over a wide 4.5V to 42V input voltage range and uses primary-side feedback to regulate the output voltage. It delivers primary peak current up to 3.7A and regulates primary output voltage to within ±1.2% over -40°C to +125°C.The device features peak-current-mode control with pulse-width modulation (PWM) scheme. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired inputvoltage level. An open-drain, active-low RESETB pin provides a delayed power-good signal to the system upon achieving successful regulation of the primary output voltage.The device operates over the -40°C to +125°C industrial temperature range and is available in a compact 20-pin (4mm x 4mm) TQFN package. Simulation models are available.ApplicationsCommunication Hub in Smart MetersFloating Power Supply GenerationIndustrial Process ControlIsolated Power Supplies in Medical Equipment

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17691A/B is a high efficiency No-Opto integrated nMOSFET flyback converter that uses fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during secondary-side rectifier conduction. No secondary- side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.The MAX17691A/B features a low RDSON, 76V, 170mΩ integrated nMOSFET primary switch and is designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17691A only). Softstart limits inrush current at startup. The MAX17691A/B supports external clock synchronization to avoid low-frequency "beats" on the input bus in systems with multiple converters. The device also has programmable frequency dithering for low-EMI, spread-spectrum operation.The MAX17691A/B allows temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17691A is internally compensated for loop stability, while the MAX17691B offers external loop compensation flexibility. The MAX17691A/B has robust hiccup- protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40°C to +125°C.ApplicationsIsolated Power SuppliesPLC I/O ModulesIGBT Gate Drive SuppliesIndustrial and Telecom Applications

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17691A/B is a high efficiency No-Opto integrated nMOSFET flyback converter that uses fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during secondary-side rectifier conduction. No secondary- side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.The MAX17691A/B features a low RDSON, 76V, 170mΩ integrated nMOSFET primary switch and is designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17691A only). Softstart limits inrush current at startup. The MAX17691A/B supports external clock synchronization to avoid low-frequency "beats" on the input bus in systems with multiple converters. The device also has programmable frequency dithering for low-EMI, spread-spectrum operation.The MAX17691A/B allows temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17691A is internally compensated for loop stability, while the MAX17691B offers external loop compensation flexibility. The MAX17691A/B has robust hiccup- protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40°C to +125°C.ApplicationsIsolated Power SuppliesPLC I/O ModulesIGBT Gate Drive SuppliesIndustrial and Telecom Applications

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17692A/B is a high efficiency no-opto integrated nMOSFET flyback converter that uses fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during the secondary-side rectifier conduction. No secondary-side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.The MAX17692A/B features a low RDSON, 76V, 205mΩ integrated nMOSFET primary switch and is designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17692A only). Softstart limits inrush current at startup. The MAX17692A/B supports external clock synchronization to avoid low-frequency "beats" on the input bus in systems with multiple converters. The device also has programmable frequency dithering for low-EMI, spread-spectrum operation.The MAX17692A/B allows temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17692A is internally compensated for loop stability, while the MAX17692B offers external loop compensation flexibility. The MAX17692A/B has robust hiccup- protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40°C to +125°C.ApplicationsIsolated Power SuppliesPLC I/O ModulesIGBT Gate Drive SuppliesIndustrial and Telecom Applications

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17693A/B are high efficiency No-Opto integrated nMOSFET flyback converters that use fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during the secondary-side rectifier conduction. No secondary-side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.The MAX17693A/B feature a low RDSON, 76V, 245mΩ integrated nMOSFET primary switch and are designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17693A only). Soft-start limits inrush current at startup. The MAX17693A/B support external clock synchronization to avoid low-frequency "beats" on the input bus in systems with multiple converters. The devices also have programmable frequency dithering for low-EMI, spread-spectrum operation.The MAX17693A/B allow temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17693A is internally compensated for loop stability, while the MAX17693B offers external loop compensation flexibility. The MAX17693A/B have robust hiccup-protection and thermal protection schemes, and are available in space-saving 12-pin, 3mm x 3mm TDFN packages with a temperature range from -40°C to +125°C.ApplicationsIGBT Gate Drive SuppliesIndustrial and Telecom ApplicationsIsolated Power SuppliesPLC I/O Modules