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LTC4160EPDC-1PBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC4160EPDC-1PBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 32 page LTC4160/LTC4160-1 1 41601f TYPICAL APPLICATION DESCRIPTION Switching Power Manager with USB On-The-Go And Overvoltage Protection The LTC®4160/LTC4160-1 are high efficiency power man- agement and Li-Ion/Polymer battery charger ICs. They each include a bidirectional switching PowerPath™ controller with automatic load prioritization, a battery charger, and an ideal diode. The LTC4160/LTC4160-1’s bidirectional switching regulator transfers nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small spaces. These devices feature a precision input current limit for USB compatibility and Bat-Track output control for efficient charging. In addition, the ICs can also generate 5V at 500mA for USB On-The- Go applications. An overvoltage circuit protects the LTC4160/LTC4160-1 from high voltage damage on the USB/wall adapter inputs with an external N-channel MOSFET and a resistor. The LTC4160/LTC4160-1 are available in the ultra-thin (0.55 mm) 20-pin 3mm × 4mm UTQFN surface mount package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and Bat-Track are a trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118, 6404251. Other patents pending. FEATURES APPLICATIONS n Bidirectional Switching Regulator Makes Optimal Use of Limited Power Available from USB Port and also Provides a 5V Output for USB On-The-Go n Overvoltage Protection Guards Against Damage n 180mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Seamlessly Provides Low Loss PowerPath When Input Power is Limited or Unavailable n Instant-On Operation with Discharged Battery n Full Featured Li-Ion/Polymer Battery Charger n Bat-Track™ Adaptive Output Control For Efficient Charging n 1.2A Max Input Current Limit n 1.2A Max Charge Current with Thermal Limiting n Battery Float Voltage: 4.2V (LTC4160), 4.1V (LTC4160-1) n Low Battery Powered Quiescent Current (8μA) n Ultra-Thin (0.55mm) 20-pin 3mm × 4mm QFN Package n Media Players and Personal Navigation Devices n Digital Cameras, PDAs, Smart Phones Battery and VBUS Currents vs Load Current High Efficiency Power Manager/Battery Charger with USB On-The-Go and Overvoltage Protection VBUS USB USB ON-THE-GO 3.3μH 10μF 0.1μF 3.01k 1k 41601 TA01a CLPROG PROG LTC4160/ LTC4160-1 SW VOUT BAT Li-Ion + OVGATE OVSENS OPTIONAL OVERVOLTAGE PROTECTION SYSTEM LOAD 6.2k 10μF LOAD CURRENT (mA) 0 250 500 750 800 41601 TA01c 0 –250 –500 200 400 600 1000 VBUS CURRENT BATTERY CURRENT (CHARGING) VBUS = 5V BAT = 3.8V 5x MODE BATTERY CURRENT (DISCHARGING) USB OTG VBUS Voltage vs VBUS Current VBUS CURRENT (mA) 0 4.5 5.0 5.5 41601 TA01b 4.0 3.5 3.0 200 400 600 100 300 500 700 VBUS = 4.75V VOUT = BAT = 3.8V USB 2.0 SPECIFICATIONS REQUIRE THAT HIGH POWER DEVICES NOT OPERATE IN THIS REGION |
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