Analog Devices Inc./Maxim Integrated

The LTC4063 is a standalone linear charger for single cell lithium-ion batteries with an adjustable low dropout linear regulator (LDO). The adjustable LDO regulates an output voltage between 1.2V to 4.2V at up to 100mA load current. When the input supply (wall adapter or USB supply) is removed, the LDO regulates the output voltage without interruption. The battery charger and LDO regulator can be enabled individually.No external sense resistor or external blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. Charge termination methods include minimum charge current or maximum time. With power applied, the LTC4063 can be put into shutdown mode to reduce the supply current to 35μA and the battery drain current to less than 2μA.Other features include smart recharge, undervoltage lockout, LDO current limiting and a charge status pin to indicate when the charge cycle has completed.ApplicationsHandheld ComputersPortable MP3 PlayersDigital Cameras

The LTC4064 is a standalone linear charger optimized for prolonging the life of 1-cell Li-ion batteries in battery backup applications. By charging to a float voltage of 4V instead of 4.2V or 4.1V, the LTC4064 decelerates the aging process and capacity degradation when the battery is unused for long periods of time but must be in a ready state.An external capacitor programs a safety timer to terminate the charge cycle while the charge current is set externally with a single resistor. When the input supply is removed, the LTC4064 automatically enters a low current sleep mode, dropping the battery drain current to less than 3µA.Additional safety features designed to maximize battery lifetime and reliability include NTC temperature sensing and low battery charge conditioning (trickle charging).The IC contains an on-chip power MOSFET and eliminates the need for an external sense resistor and blocking diode. The LTC4064 also includes C/10 detection circuitry, AC present logic, and fault detection circuitry.ApplicationsFile Servers, RAID SystemsStorage ProductsLi-Ion Battery Back-Up

The LTC4065L is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its small size and ability to accurately regulate low charge currents make the LTC4065L especially well-suited for portable applications using low capacity rechargeable lithium-ion cells. Furthermore, LTC4065L is specifically designed to work within USB power specifications.TheCHRGpin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications.The LTC4065L-4.1/LTC4065LX-4.1 features a constant-voltage float voltage of 4.1V. This 4.1V version of the standard LTC4065L/LTC4065LX is intended for back-up or high ambient temperature applications. Under these conditions, a reduced float voltage will trade-off initial cell capacity for the benefit of increased capacity retention over the life of the battery. A reduced float voltage also minimizes swelling in prismatic and polymer cells.When the input supply (wall adapter or USB supply) is removed, the LTC4065L automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4065L can be put into shutdown mode, reducing the supply current to less than 20µA.The full-featured LTC4065L also includes automatic recharge, low-battery charge conditioning (trickle charging) and soft-start (to limit inrush current).Float Voltage (V)Charge Current RangePin 5 Is EN or ACPR?Trickle Charge?LTC40654.2V40mA to 750mAENYesLTC4065A4.2V40mA to 750mAACPRYesLTC4065-4.44.4V40mA to 750mAENYesLTC4065L4.2V8mA to 250mAENYesLTC4065LX4.2V8mA to 250mAENNoLTC4065L-4.14.1V8mA to 250mAENYesApplicationsCharger for Li-Ion Coin Cell BatteriesPortable MP3 Players, Wireless HeadsetsBluetooth ApplicationsMultifunction Wristwatches

The LTC4065-4.4 is a complete constant-current/constant-voltage linear charger for high capacity single-cell lithium-ion batteries with a 4.4V float voltage. Its 2mm × 2mm DFN package and low external component count make the LTC4065-4.4 especially well-suited for portable applications. Furthermore, LTC4065-4.4 is specifically designed to work within USB power specifications.TheCHRGpin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications.No external sense resistor or blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates charge current to limit the die temperature during high power operation or high ambient temperature conditions.When the input supply (wall adapter or USB supply) is removed, the LTC4065-4.4 automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4065-4.4 can be put into shutdown mode, reducing the supply current to less than 20µA.The full-featured LTC4065-4.4 also includes automatic recharge, low-battery charge conditioning (trickle charging) and soft-start (to limit inrush current).The LTC4065-4.4 is available in a tiny 6-lead, low profile (0.75mm) 2mm × 2mm DFN package.Float Voltage (V)Charge Current RangePin 5 Is EN or ACPR?Trickle Charge?LTC40654.2V40mA to 750mAENYesLTC4065A4.2V40mA to 750mAACPRYesLTC4065-4.44.4V40mA to 750mAENYesLTC4065L4.2V8mA to 250mAENYesLTC4065LX4.2V8mA to 250mAENNoLTC4065L-4.14.1V8mA to 250mAENYesApplicationsWireless PDAsCellular PhonesPortable Electronics

The LTC4065L is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its small size and ability to accurately regulate low charge currents make the LTC4065L especially well-suited for portable applications using low capacity rechargeable lithium-ion cells. Furthermore, LTC4065L is specifically designed to work within USB power specifications.TheCHRGpin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications.The LTC4065L-4.1/LTC4065LX-4.1 features a constant-voltage float voltage of 4.1V. This 4.1V version of the standard LTC4065L/LTC4065LX is intended for back-up or high ambient temperature applications. Under these conditions, a reduced float voltage will trade-off initial cell capacity for the benefit of increased capacity retention over the life of the battery. A reduced float voltage also minimizes swelling in prismatic and polymer cells.When the input supply (wall adapter or USB supply) is removed, the LTC4065L automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4065L can be put into shutdown mode, reducing the supply current to less than 20µA.The full-featured LTC4065L also includes automatic recharge, low-battery charge conditioning (trickle charging) and soft-start (to limit inrush current).Float Voltage (V)Charge Current RangePin 5 Is EN or ACPR?Trickle Charge?LTC40654.2V40mA to 750mAENYesLTC4065A4.2V40mA to 750mAACPRYesLTC4065-4.44.4V40mA to 750mAENYesLTC4065L4.2V8mA to 250mAENYesLTC4065LX4.2V8mA to 250mAENNoLTC4065L-4.14.1V8mA to 250mAENYesApplicationsCharger for Li-Ion Coin Cell BatteriesPortable MP3 Players, Wireless HeadsetsBluetooth ApplicationsMultifunction Wristwatches

The LTC4066/LTC4066-1 are USB power managers and Li-Ion battery chargers designed to work in portable battery-powered applications. The parts control the total current used by the USB peripheral for operation and battery charging. The total input current can be limited to 100mA, 500mA or "unlimited" (i.e., above 2A). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit.The LTC4066/LTC4066-1 include a standalone constant-current / constant-voltage linear charger for single cell Li-ion batteries. The float voltage applied to the battery is held to a tight 0.8% tolerance, and charge current is programmable using an external resistor to ground. A programmable end-of-charge status output (CHRG) indicates full charge. BAT pin charge and discharge currents can be monitored via an analog output (ISTAT). Total charge time is programmable by an external capacitor to ground. When the battery drops 100mV below the float voltage, automatic recharging of the battery occurs. Also featured is an NTC thermistor input used to monitor battery temperature while charging.The LTC4066/LTC4066-1 are available in a 24-pin thin profile (0.75mm) 4mm x 4mm QFN package. The LTC4066 is also available in a 24-pin ultrathin profile (0.55mm) 4mm x 4mm UTQFN package.ApplicationsPortable USB DevicesGPS, Cameras, Broadband Wireless ModemsMulitple Input Chargers

The LTC4067 is a USB power management and Li-Ion/ Polymer battery charger designed for portable battery powered applications. The part controls total current used by the USB peripheral for operation and battery charging. The total input current may be left unregulated, or it may be limited to 20% or 100% of the programmed value up to 1.5A (typically 500mA). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current.With the addition of an external P-channel MOSFET the LTC4067 can withstand voltages up to 13V.The LTC4067 includes a complete constant current/constant voltage linear charger for single cell Li-Ion batteries. The float voltage applied to the battery is held to a tight 0.4% tolerance, and charge current is programmed using an external resistor to ground. An end-of-charge status output,CHRG, indicates full charge. Also featured is an NTC thermistor input used to monitor battery temperature while charging.The LTC4067 is available in a 12-lead low profile 4mm × 3mm DFN package.ApplicationsAutomatic Battery Charging/Load SwitchoverBackup Battery ChargerUninterrupted Supplies

The LTC4069-4.4 is a complete constant-current/constant-voltage linear charger for high capacity single-cell lithium-ion batteries with a 4.4V float voltage. The 2mm × 2mm DFN package and low external component count make the LTC4069-4.4 especially well-suited for portable applications. Furthermore, LTC4069-4.4 is specifically designed to work within USB power specifications.TheCHRGpin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications.No external sense resistor or blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates charge current to limit the die temperature during high power operation or high ambient temperature conditions.When the input supply (wall adapter or USB supply) is removed, the LTC4069-4.4 automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4069-4.4 can be put into shutdown mode, reducing the supply current to less than 20µA.The LTC4069-4.4 also includes automatic recharge, lowbattery charge conditioning (trickle charging), soft-start (to limit inrush current) and an NTC thermistor input used to monitor battery temperature.The LTC4069-4.4 is available in a tiny 6-lead, low profile (0.75mm) 2mm × 2mm DFN package.Float VoltageLTC40694.2VLTC4069-4.44.4VApplicationsWireless PDAsCellular PhonesPortable Electronics