LP28303ASPF

Preliminary Datasheet LP28303A 2.5A Synchronous Buck Li-ion Charger General Description Features The LP28303A is a 2.5A Li-Ion battery charger. It  Input voltage range 4.5V~5.5V utilizes a 600KHz synchronous buck  Dynamic input current allocation for maximum converter topology to reduce power dissipation during charging. charging rate Low power dissipation and internal MOSFET allow a  2.5A Maximum Charge Current physically small charger that can be embedded in a  No External MOSFETs and Blocking Diode wide range of handheld applications. The LP28303A includes complete charge termination circuitry, automatic recharge and ±1% 4.2V float voltage. Battery charge current, charge timeout Required  Efficiency up to 90%  Constant-Current/Constant-Voltage with Thermal Regulation to Maximize Charge and Rate Without Risk of Overheating end-of-charge indication parameters are set with external components. Additional features include Optional Battery Temperature Monitoring Before  and During Charge Automatic Sleep Mode for shorted cell detection; temperature qualified charging Low-Power and overvoltage protection. The LP28303A is available in a low profile ESOP8&TDFN-10 and package. Operation  Over Current Protection  Consumption Available in ESOP8 & TDFN-10 3*3mm Order Information RoHS Compliant and 100% Lead (Pb)-Free  LP28303A F: Pb-Free Package Type SP: ESOP-8 QV: TDFN-10 Typical Application Circuit VIN CIN 22uF LED1 R2 2KΩ LED2 1 2 3 R4 10KΩ VIN SW CHRG CS FULL BAT NTC AGND VBAT 6 5 L 4.7uH RCS 25mΩ CBAT 22uF 4 7 PGND 9  Portable Media Players  Cellular and Smart mobile phone  PDA/DSC  Handheld Battery-Powered Devices  Handheld Computers  Charging Docks and Cradles Apr.-2017 R1 2KΩ R3 10KΩ Applications LP28303A-00 8 Marking Information Device Marking Package Shipping LP28303ASPF LPS ESOP8 4K/REEL LP28303AQVF LP28303A TDFN10 5K/REEL YWX Marking indication: Y:Production year W:Production week X: Series Number Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8 Preliminary Datasheet LP28303A Functional Pin Description ESOP8 Package Type Pin Configurations CHRG 1 FULL 2 9(PAD) PGND TDFN-10 8 VIN 7 AGND NTC 3 6 SW VBAT 4 5 CS AGND 1 10 SW PGND 2 9 SW VIN 3 8 CS CHRG 4 7 BAT FULL 5 6 NTC PGND TDFN-10 TOP VIEW ESOP-8 (Top View) Pin Description Pin No. ESOP8 TDFN-10 4 1 5 2 Name CHRG FULL 6 3 Description Open-Drain charge status output. When the battery is charging, this pin is pulled low by an internal N-channel MOSFET. Open-Drain charge status output. When charging is complete, this pin is pulled low by an internal N-channel MOSFET. Negative Temperature Coefficient Thermistor Input. This pin senses the NTC temperature of the battery pack and stops the charger when the temperature is out of range. Connect to GND for disabling this function. 4 7 VBAT 5 8 CS Current Sense pin. 6 9/10 SW Switch pin. Connect to external inductor. 7 1 AGND 8 9(PAD) LP28303A-00 3 2 VIN PGND Apr.-2017 Battery pin. Analog (signal) Ground Positive Supply Voltage Input. Decouple with a 10µF or larger surface mounted ceramic capacitor. Power Ground. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8 Preliminary Datasheet LP28303A Absolute Maximum Ratings Note 1  VIN pin to GND ------------------------------------------------------------------------------------------------------------ 7V  VBAT pin to GND ---------------------------------------------------------------------------------------------------------- 7V  Other pin to GND ---------------------------------------------------------------------------------------------------------- 7V  Maximum Junction Temperature ---------------------------------------------------------------------------------- 150℃  Operating Ambient Temperature Range (TA) -------------------------------------------------------- -20℃ to 85℃  Maximum Soldering Temperature (at leads, 10 sec) --------------------------------------------------------- 260℃ Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Thermal Information  Maximum Power Dissipation (ESOP8, PD, TA=25℃) ----------------------------------------------------------- 2W  Thermal Resistance (ESOP8, θJA) ----------------------------------------------------------------------------- 50℃/W Recommended Operating Conditions  Ambient Temperature Range --------------------------------------------------------------------------- -20℃ to 85℃ ESD Susceptibility  HBM(Human Body Mode) --------------------------------------------------------------------------------------------- 2KV  MM(Machine Mode) --------------------------------------------------------------------------------------------------- 200V LP28303A-00 Apr.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 8 Preliminary Datasheet LP28303A Electrical Characteristics (The specifications which apply over the full operating temperature range, otherwise specifications are at TA=25℃, VIN = 5V, unless otherwise noted.) Symbol Parameter VIN Adapter/USB Voltage Range ICC Input Supply Current VFLOAT Regulated Output (Float) Voltage VCS IBAT Current Sense Reference Voltage (For CS to BAT) BAT Pin Current Condition Min Typ 4.5 Standby Mode Max Units 5.5 V 0.1 (Charge Terminated) 4.158 4.2 mA 4.242 V VTRIKL