Analog Devices Inc./Maxim Integrated

The MAX25252 is a high-efficiency, five-output ASIL B PMIC with three DC-DC converters, and two high-PSRR LDOs, with OV/UV monitoring on all outputs. OUT1 is a 1A high-voltage, synchronous step-down converter operating from power over coax. OUT2 and OUT3 are low voltage synchronous step-down converters and provide a 0.75V to 3.9375V output voltage range. OUT2 and OUT3 can deliver up to 1.7A current respectively for the high-megapixel cameras and high-speed serializers. LDO4 and LDO5 deliver up to 0.4A and 0.9A of current to power the secondary rails of the imager and a serializer. All outputs achieve ±1.5% output accuracy over load, line, and temperature range. Overvoltage and undervoltage for each output are monitored and their statuses are communicated throughRESETand I2C.The device features temperature monitoring with external NTC. The IC accurately measures PCB temperature and flags the temperature warning throughRESET.The device features a 2.1MHz fixed-frequency PWM mode for better noise immunity and load transient response. The 2.1MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions.The I2C programmable output voltages and sequencing increases flexibility for different image sensors and configurations. Other features include soft-start, overcurrent, and overtemperature protections.APPLICATIONSSurround-View CamerasRear-View CamerasSide-View CamerasForward-Looking Cameras

The MAX25256 H-bridge transformer driver provides a simple solution for making isolated power supplies up to 10W. The device drives a transformer’s primary coil with up to 300mA of current from a wide 8V to 36V direct current (DC) supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage.The device features adjustable current limiting, allowing indirect limiting of secondary-side load currents. The current limit of the MAX25256 is set by an external resistor. A active-low FAULT output asserts when the device detects an overtemperature or overcurrent condition. In addition, the device features a low-power mode to reduce the overall supply current to 0.65mA (typ) when the driver is not in use.The device can be operated using the internal oscillator or driven by an external clock to synchronize multiple MAX25256 devices and precisely set the switching frequency. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC flow through the transformer, regardless of which clock source is used.The device is available in a small 10-pin (3mm x 3mm) TDFN package and is specified over the -40°C to +125°C automotive temperature range.ApplicationsDual-Battery SystemsIsolated Gate Driver SuppliesIsolated Supplies for controller area network (CAN), serial peripheral interface (SPI), I2C, etc.Isolated Supplies for Motor Control

The MAX25262/MAX25263 are small, synchronous buck converters with integrated high-side and low-side switches. The device is designed to deliver up to 2A/3A with 3.5V to 65V input voltages while using only 3.5µA quiescent current at no load. The IC comes with a small 20ns minimum on-time capability, which enables the large step-down conversions in a single stage without skipping cycles. A max duty cycle of 98% and low high side FET ON resistance enable a low dropout operation for low input voltage applications.The voltage quality can be monitored by observing the PGOOD signal. The device offers two fixed 5V and 3.3V output voltages. In addition, the device can be configured for 1V to 20V output voltages using an external resistor-divider. The frequency is internally fixed at 2.1MHz, which allows for small external components, reduced output ripple, and guarantees no AM interference. A 400kHz option is also offered to provide the minimum switching losses and maximum efficiency. For high light load efficiency, the IC enters skip mode at light loads when FSYNC is pulled low. A pin selectable forced pulse-width modulation (PWM) mode is also available for the EMI critical applications. The IC comes in a symmetrical flip-chip package that offers superior EMI performance. Further, the pin selectable spread spectrum helps to enhance the EMI performance.ApplicationsAutomotive Instrument ClusterDistributed DC Power SystemsDouble battery automotive systemsNavigation and Radio Head Units

The MAX25262/MAX25263 are small, synchronous buck converters with integrated high-side and low-side switches. The device is designed to deliver up to 2A/3A with 3.5V to 65V input voltages while using only 3.5µA quiescent current at no load. The IC comes with a small 20ns minimum on-time capability, which enables the large step-down conversions in a single stage without skipping cycles. A max duty cycle of 98% and low high side FET ON resistance enable a low dropout operation for low input voltage applications.The voltage quality can be monitored by observing the PGOOD signal. The device offers two fixed 5V and 3.3V output voltages. In addition, the device can be configured for 1V to 20V output voltages using an external resistor-divider. The frequency is internally fixed at 2.1MHz, which allows for small external components, reduced output ripple, and guarantees no AM interference. A 400kHz option is also offered to provide the minimum switching losses and maximum efficiency. For high light load efficiency, the IC enters skip mode at light loads when FSYNC is pulled low. A pin selectable forced pulse-width modulation (PWM) mode is also available for the EMI critical applications. The IC comes in a symmetrical flip-chip package that offers superior EMI performance. Further, the pin selectable spread spectrum helps to enhance the EMI performance.ApplicationsAutomotive Instrument ClusterDistributed DC Power SystemsDouble battery automotive systemsNavigation and Radio Head Units

The MAX20077/MAX25277 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 2.5A (2.0A for the MAX20077ATCC/VY+ variant) with 3.5V to 36V input voltages while using only 3.5μA quiescent current at no load.The device provides an accurate output voltage of ±2% in FPWM mode within the normal 6V to 18V operation input range. With 20ns minimum on-time capability, the converter is capable of large input-to-output conversion ratios. Voltage quality can be monitored by observing the PGOOD signal. The device can operate in dropout by running at 99% duty cycle, making it ideal for automotive and industrial applications. The device offers two fixed 5V and 3.3V output voltages. In addition, the device can be configured for 1V to 10V output voltages using an external resistor-divider. Frequency is internally fixed at 2.1MHz, which allows for small external components and reduced output ripple, and guarantees no AM interference. A 400kHz option is also offered to provide minimum switching losses and maximum efficiency. The device automatically enters skip mode at light loads with ultra-low 3.5μA quiescent current at no load. The device offers pin-enabled spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the modulation frequency.The MAX20077/MAX25277 variants are available in a small (3mm x 3mm), 12-pin, side-wettable TDFN package with an exposed pad, and require very few external components.ApplicationsAutomotiveHigh-Voltage DC-DC ConvertersIndustrial

The MAX253 monolithic oscillator/power-driver is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.ApplicationsBridge Ground DifferentialsHigh Noise-Immunity Communications InterfaceIsolated and/or High-Voltage Power SuppliesIsolated RS-485/RS-232 Power SupplyMedical EquipmentProcess ControlTransformer Driver

The MAX25300A/MAX25300Bare low-noise linear regulators that deliver up to 500mA of output current with only 12μVRMSof output noise from 10Hz to 100kHz. These regulators maintain ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 365μA no-load supply current is independent of dropout voltage.The MAX25300A has nine pin-selectable output voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX25300B has a resistor-adjustable output voltage in the 0.6V to 5.3V range. The MAX25300B also includes an active-high POK output.The MAX25300A/MAX25300B are offered in an 8-pin TDFN package.APPLICATIONSAutomotive ElectronicsAudio SystemsHigh-Resolution Data Acquisition Systems