Analog Devices Inc./Maxim Integrated

The LTC3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency, bidirectional switching PowerPath™manager with automatic load prioritization, a battery charger, an ideal diode, a controller for an external high voltage switching regulator and three general purpose step-down switching regulators with I2C adjustable output voltages. The internal switching regulators automatically limit input current for USB compatibility and can also generate 5V at 500mA for USB on-the-go applications when powered from the battery. Both the USB and external switching regulator power paths feature Bat-Track optimized charging to provide maximum power to the application from supplies as high as 38V. An overvoltage circuit protects the LTC3576/LTC3576-1 from damage due to high voltage on the VBUSor WALL pins with just two external components. The LTC3576/LTC3576-1 are available in a low profile 38-pin (4mm × 6mm × 0.75mm) QFN package.ApplicationsHDD-Based Media PlayersGPS, PDAs, Digital Cameras, Smart PhonesAutomotive Compatible Portable Electronics

The LTC3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency, bidirectional switching PowerPath™manager with automatic load prioritization, a battery charger, an ideal diode, a controller for an external high voltage switching regulator and three general purpose step-down switching regulators with I2C adjustable output voltages. The internal switching regulators automatically limit input current for USB compatibility and can also generate 5V at 500mA for USB on-the-go applications when powered from the battery. Both the USB and external switching regulator power paths feature Bat-Track optimized charging to provide maximum power to the application from supplies as high as 38V. An overvoltage circuit protects the LTC3576/LTC3576-1 from damage due to high voltage on the VBUSor WALL pins with just two external components. The LTC3576/LTC3576-1 are available in a low profile 38-pin (4mm × 6mm × 0.75mm) QFN package.ApplicationsHDD-Based Media PlayersGPS, PDAs, Digital Cameras, Smart PhonesAutomotive Compatible Portable Electronics

The LTC3577 is a highly integrated power management IC for single cell Li-Ion/Polymer battery applications. It includes a PowerPath manager with automatic load prioritization, a battery charger, an ideal diode, input overvoltage protection and numerous other internal protection features. The LTC3577 is designed to accurately charge from current limited supplies such as USB by automatically reducing charge current such that the sum of the load current and the charge current does not exceed the programmed input current limit (100mA or 500mA modes). The LTC3577 reduces the battery voltage at elevated temperatures to improve safety and reliability. Efficient high current charging from supplies up to 38V is available using the on-chip Bat-Track controller. The LTC3577 also includes a pushbutton input to control the three synchronous step-down switching regulators and system reset. The onboard LED backlight boost circuitry can drive up to 10 series LEDs and includes versatile digital dimming via I2C input. The I2C input also controls two 150mA LDOs as well as other operating modes and status read back. The LTC3577 is available in a low profile 4mm × 7mm × 0.75mm 44-pin QFN package.BatTrackFloat VoltageLTC3577Yes4.2VLTC3577-1Yes4.1VLTC3577-3No4.2VLTC3577-4No4.1VApplicationsPNDs, DMB/DVB-H; Digital/Satellite Radio;Media PlayersPortable Industrial/Medical ProductsUniversal Remotes, Photo ViewersOther USB-Based Handheld Products

The LTC3577 is a highly integrated power management IC for single cell Li-Ion/Polymer battery applications. It includes a PowerPath manager with automatic load prioritization, a battery charger, an ideal diode, input overvoltage protection and numerous other internal protection features. The LTC3577 is designed to accurately charge from current limited supplies such as USB by automatically reducing charge current such that the sum of the load current and the charge current does not exceed the programmed input current limit (100mA or 500mA modes). The LTC3577 reduces the battery voltage at elevated temperatures to improve safety and reliability. Efficient high current charging from supplies up to 38V is available using the on-chip Bat-Track controller. The LTC3577 also includes a pushbutton input to control the three synchronous step-down switching regulators and system reset. The onboard LED backlight boost circuitry can drive up to 10 series LEDs and includes versatile digital dimming via I2C input. The I2C input also controls two 150mA LDOs as well as other operating modes and status read back. The LTC3577 is available in a low profile 4mm × 7mm × 0.75mm 44-pin QFN package.BatTrackFloat VoltageLTC3577Yes4.2VLTC3577-1Yes4.1VLTC3577-3No4.2VLTC3577-4No4.1VApplicationsPNDs, DMB/DVB-H; Digital/Satellite Radio;Media PlayersPortable Industrial/Medical ProductsUniversal Remotes, Photo ViewersOther USB-Based Handheld Products

The LTC3586-2/LTC3586-3 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency current limited switching PowerPath manager with automatic load prioritization, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buckboost and one boost). Designed specifically for USB applications, the LTC3586-2/LTC3586-3’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications.Unlike linear chargers, the LTC3586-2/LTC3586-3 switching architecture transmits nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small places. The two buck regulators can provide up to 400mA each, the buck-boost can deliver 1A, and the boost delivers at least 800mA.The LTC3586-2/LTC3586-3 are available in a low profile (0.75mm) 38-pin 4mm × 6mm QFN package.OptionsFloat Voltage (V)Fault Pin FunctionalityBoost Overvoltage Threshold (V)Boost Overvoltage HysteresisLTC35864.2VBi-Directional with Latch5.3V300mVLTC3586-14.1VBi-Directional with Latch5.3V300mVLTC3586-24.2VOutput Only, No Latch5.5V100mVLTC3586-34.1VOutput Only, No Latch5.5V100mVApplicationsPortable Medical/Industrial DevicesOther USB-Based Handheld Products

The LTC3586-2/LTC3586-3 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency current limited switching PowerPath manager with automatic load prioritization, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buckboost and one boost). Designed specifically for USB applications, the LTC3586-2/LTC3586-3’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications.Unlike linear chargers, the LTC3586-2/LTC3586-3 switching architecture transmits nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small places. The two buck regulators can provide up to 400mA each, the buck-boost can deliver 1A, and the boost delivers at least 800mA.The LTC3586-2/LTC3586-3 are available in a low profile (0.75mm) 38-pin 4mm × 6mm QFN package.OptionsFloat Voltage (V)Fault Pin FunctionalityBoost Overvoltage Threshold (V)Boost Overvoltage HysteresisLTC35864.2VBi-Directional with Latch5.3V300mVLTC3586-14.1VBi-Directional with Latch5.3V300mVLTC3586-24.2VOutput Only, No Latch5.5V100mVLTC3586-34.1VOutput Only, No Latch5.5V100mVApplicationsPortable Medical/Industrial DevicesOther USB-Based Handheld Products

The LTC3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers. An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output. In regulation, the LTC3588-1 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable with up to 100mA of continuous output current; however, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.Output Voltage (Switcher)UVLOQuiescent CurrentLTC3588-1Selectable 1.8V, 2.5V, 3.3V or 3.6V4.04V(Rising)2.87V(Falling)950nA (No Load)450nA (UVLO)LTC3588-2Selectable 3.45V, 4.1V, 4.5V or 5V16V(Rising)14V(Falling)1,500nA (No Load)830nA (UVLO)ApplicationsPiezoelectric Energy HarvestingElectro-Mechanical Energy HarvestingWireless HVAC SensorsMobile Asset TrackingTire Pressure SensorsBattery Replacement for Industrial SensorsRemote Light SwitchesStandalone Nanopower Buck Regulator

The LTC3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers. An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output. In regulation, the LTC3588-1 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable with up to 100mA of continuous output current; however, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.Output Voltage (Switcher)UVLOQuiescent CurrentLTC3588-1Selectable 1.8V, 2.5V, 3.3V or 3.6V4.04V(Rising)2.87V(Falling)950nA (No Load)450nA (UVLO)LTC3588-2Selectable 3.45V, 4.1V, 4.5V or 5V16V(Rising)14V(Falling)1,500nA (No Load)830nA (UVLO)ApplicationsPiezoelectric Energy HarvestingElectro-Mechanical Energy HarvestingWireless HVAC SensorsMobile Asset TrackingTire Pressure SensorsBattery Replacement for Industrial SensorsRemote Light SwitchesStandalone Nanopower Buck Regulator

The LTC3588-2 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers.An ultralow quiescent current undervoltage lockout (UVLO) mode with a 16V rising threshold enables efficient energy extraction from sources with high open circuit voltages. This energy is transferred from the input capacitor to the output via a high efficiency synchronous buck regulator. The 16V UVLO threshold also allows for input to output current multiplication through the buck regulator. The buck features a sleep state that minimizes both input and output quiescent currents while in regulation.Four output voltages of 3.45V, 4.1V, 4.5V and 5.0V are pin selectable with up to 100mA of continuous output current, and suit Li-Ion and LiFePO4batteries as well as supercapacitors. An input protective shunt set at 20V provides overvoltage protection.Output Voltage (Switcher)UVLOQuiescent CurrentLTC3588-1Selectable 1.8V, 2.5V, 3.3V or 3.6V4.04V(Rising)2.87V(Falling)950nA (No Load)450nA (UVLO)LTC3588-2Selectable 3.45V, 4.1V, 4.5V or 5V16V(Rising)14V(Falling)1,500nA (No Load)830nA (UVLO)ApplicationsPiezoelectric Energy HarvestingElectro-Mechanical Energy HarvestingLow Power Battery ChargingWireless HVAC SensorsMobile Asset TrackingTire Pressure SensorsBattery Replacement for Industrial Sensors