Analog Devices Inc./Maxim Integrated

The MAX20056B is a 6-channel LED driver that integrates a DC-DC switching boost/SEPIC controller and six 120mA current sinks. A current-mode switching DC-DC controller provides the necessary voltage to the strings of HB LEDs.An internal current-mode switching DC-DC controller supports boost, SEPIC, or coupled-inductor buck-boost topologies and operates in a programmable frequency range between 400kHz and 2.2MHz. Current-mode control provides fast response and simplifies loop compensation. An adaptive output-voltage-adjustment scheme minimizes power dissipation in the LED current sinks.An external resistor sets the channel currents to the same value in the range of 20mA to 120mA. The device features logic-controlled pulse-width modulation (PWM) dimming with minimum pulse widths as low as 500ns, and either phase-shifted LED strings or standard dimming control. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple, as well as audible noise. With phase shifting disabled, each current sink is turned on at the same time and allows parallel connection of current sinks for > 120mA per string.ApplicationsAutomotive Central Information DisplaysAutomotive DashboardsAutomotive Head-Up DisplaysAutomotive Navigation Systems

The MAX20057 is an automotive highly integrated triple-output PMIC. It includes two synchronous buck converters and an asynchronous boost controller with 2.1MHz and 400kHz options. The boost controller can be used to provide power to buck converters and keep them in regulation during cold-crank operation down to 2V battery input. Two high-voltage synchronous step-down converters operate 180° out-of-phase. The IC operates with an input voltage supply from 3.5V to 36V and can operate in dropout conditions by running at 95% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions.High switching frequency up to 2.1MHz allows small external components, reduced output ripple, and guarantees no AM band interference. The switching frequency is fixed at 400kHz or 2.1MHz. FSYNC input programmability enables three modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and phase-locked synchronization to an external clock. The spread spectrum option minimizes EMI interference.The IC features the power-OK indicators for buck converters and undervoltage lockout for each power rail. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20057 is specified for operation over the -40°C to +125°C automotive temperature range.Applications● Navigation and Radio Head Units

The MAX20058 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter IC with integrated MOSFETs that operates over a 4.5V to 60V input. The converters can deliver up to 1A current. Output voltage is programmable from 0.8V to 90%VIN. The feedback voltage-regulation accuracy over -40°C to +125°C is ±1.5%.The IC features a peak-current-mode-control architecture and can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.The MAX20058 is available in a 12-pin (3mm x 3mm) side-wettable TDFN package with an exposed pad for thermal heat dissipationApplications14V/24V SystemsTruck Applications

The MAX20059 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter IC with integrated MOSFETs that operates over a 4.5V to 72V input. The converters can deliver up to 1A current. Output voltage is programmable from 0.8V to 90%VIN. The feedback voltage-regulation accuracy over -40°C to +125°C is ±1.5%.The IC features a peak-current-mode-control architecture and can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.The MAX20059 is available in a 12-pin (3mm x 3mm) side-wettable TDFN package with an exposed pad for thermal heat dissipation.Applications48V SystemsMild Hybrid Applications

The MAX20067/MAX20067B are complete TFT bias solution for automotive applications. It includes a current-mode boost converter and two push-pull charge-pump drivers.The IC also includes a gate-shading push-pull level shifter that can be used to improve display uniformity (when needed), and a DAC and VCOM buffer. All blocks on the IC can be used in stand-alone mode or through the I2C interface.Comprehensive control functions are included using the built-in I2C interface, as well as diagnostics and monitoring.The IC is intended to operate with 2.7V to 5.5V supplies.The MAX20067/MAX20067B are available in a 32-pin TQFN package and operates in the -40°C to +105°C temperature range.ApplicationsCentral Information DisplaysInfotainment DisplaysInstrument Clusters

The MAX20069B is a highly integrated TFT power supply and LED backlight driver IC for automotive TFT-LCD applications. The IC integrates one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to four strings of LEDs in the display backlight.The source-driver power supplies consist of a synchronous boost converter and an inverting buck-boost converter that can generate voltages up to +15V and down to -7V. The positive source driver can deliver up to 120mA, while the negative source driver is capable of 100mA. The positive source-driver supply regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP or through I2C. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS(down to a minimum of -7V). The source-driver supplies operate from an input voltage between 2.8V and 5.5V.The gate-driver power supplies consist of regulated charge pumps that generate up to +28V and -21.5V and can deliver up to 3mA each.The IC features a quad-string LED driver that operates from a separate input voltage (VBATT) and can power up to four strings of LEDs with 150mA (max) of current per string. The IC features logic-controlled pulse-width-modulation (PWM) dimming, with minimum pulse widths as low as 500ns with the option of phase shifting the LED strings with respect to each other. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple as well as audible noise. With phase shifting disabled, the current sinks turn on simultaneously and parallel connection of current sinks is possible.The startup and shutdown sequences for all power domains are controlled using one of the seven preset modes, which are selectable through a resistor on the SEQ pin or through the I2C interface.The MAX20069B is available in a 40-pin (6mm x 6mm) TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.Applications• Automotive Central Information Displays• Automotive Dashboards• Automotive Head Up Displays• Automotive Navigation System

The MAX20069B is a highly integrated TFT power supply and LED backlight driver IC for automotive TFT-LCD applications. The IC integrates one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to four strings of LEDs in the display backlight.The source-driver power supplies consist of a synchronous boost converter and an inverting buck-boost converter that can generate voltages up to +15V and down to -7V. The positive source driver can deliver up to 120mA, while the negative source driver is capable of 100mA. The positive source-driver supply regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP or through I2C. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS(down to a minimum of -7V). The source-driver supplies operate from an input voltage between 2.8V and 5.5V.The gate-driver power supplies consist of regulated charge pumps that generate up to +28V and -21.5V and can deliver up to 3mA each.The IC features a quad-string LED driver that operates from a separate input voltage (VBATT) and can power up to four strings of LEDs with 150mA (max) of current per string. The IC features logic-controlled pulse-width-modulation (PWM) dimming, with minimum pulse widths as low as 500ns with the option of phase shifting the LED strings with respect to each other. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple as well as audible noise. With phase shifting disabled, the current sinks turn on simultaneously and parallel connection of current sinks is possible.The startup and shutdown sequences for all power domains are controlled using one of the seven preset modes, which are selectable through a resistor on the SEQ pin or through the I2C interface.The MAX20069B is available in a 40-pin (6mm x 6mm) TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.Applications• Automotive Central Information Displays• Automotive Dashboards• Automotive Head Up Displays• Automotive Navigation System

The MAX20069C is a highly integrated TFT power supply and LED backlight driver IC for automotive TFT-LCD applications. The IC integrates one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to four strings of LEDs in the display backlight.The source-driver power supplies consist of a synchronous boost converter and an inverting buck-boost converter that can generate voltages up to +18V and down to -7V. The positive source driver can deliver up to 120mA, while the negative source driver is capable of 100mA. The positive source-driver supply-regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP or through I2C. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS(down to a minimum of -7V). The source-driver supplies operate from an input voltage between 2.8V and 5.5V.The gate-driver power supplies consist of regulated charge pumps that generate from +28V to -21.5V and can deliver up to 3mA each.The IC features a quad-string LED driver that operates from a separate input voltage (VBATT) and can power up to four strings of LEDs with 150mA (max) of current per string. The IC features logic-controlled pulse-width-modulation (PWM) dimming, with minimum pulse widths as low as 500ns with the option of phase shifting the LED strings with respect to one another. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple, as well as audible noise. With phase shifting disabled, the current sinks turn on simultaneously and parallel connection of current sinks is possible.The startup and shutdown sequences for all power domains are controlled using one of the seven preset modes, which are selectable through a resistor on the SEQ pin or through the I2C interface.The MAX20069C is available in a 40-pin (6mm x 6mm) TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.ApplicationsAutomotive Central Information DisplaysAutomotive DashboardsAutomotive Head Up DisplaysAutomotive Navigation System

The MAX20070/MAX20070B are highly integrated power supplies and LED backlight drivers for automotive TFT-LCD applications. The devices integrate one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to two strings of LEDs in the display backlight.The source-driver power supplies consist of a boost converter and an inverting buck-boost converter that can generate voltages up to +15V and -15V. Both source-driver power supplies can deliver up to 100mA. The positive source-driver supply regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP. Connecting the FBP pin to ground sets the regulation voltage (VPOS) to +6.5V. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOSwithin ±50mV. The source-driver supplies use an input voltage from 2.7V to 5.5V to generate the output voltages.The gate-driver power supplies consist of regulated charge pumps that generate up to +22V and -22V and can deliver up to 3mA each. The regulation voltage (VGVDD) on the positive charge pump is set by a resistor-divider on FBPG; the regulation voltage (VGVEE) on the negative charge pump is set by a resistor-divider on FBNG.The ICs feature a dual-string LED driver that operates off a separate input voltage (VBATT) and can power up to two strings of LEDs with 160mA (max) of current per string.The startup and shutdown sequences for all power domains is controlled using one of the seven preset modes that are selectable through a resistor on SEQ.The MAX20070/MAX20070B are available in a 32-pin, 5mm × 5mm TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.ApplicationsAutomotive Central Information DisplaysAutomotive DashboardsAutomotive Head-Up DisplaysAutomotive Navigation System