MIC79050-4.2YS Microchip

MIC79050 Simple Lithium-Ion Battery Charger Features General Description High-Accuracy Charge Voltage: 0.75% over The MIC79050 is a simple single-cell lithium-ion battery 5C to + 60C (Li-ion charging temperature charger. It includes an on-chip pass transistor for high range) precision charging. Featuring ultra-high precision (0.75% over the Li-ion battery charging temperature Zero Off-Mode Current range) and zero off-mode current, the MIC79050 10 A Reverse Leakage provides a very simple, cost effective solution for Ultra-Low 380 mV Dropout at 500 mA charging lithium-ion battery. Wide Input Voltage Range Other features of the MIC79050 include current-limit Logic-Controlled Enable Input (8-Lead Devices and thermal shutdown protection. In the event the input Only) voltage to the charger is disconnected, the MIC79050 Thermal Shutdown and Current-Limit Protection also provides minimal reverse-current and Power MSOP-8, Power SOIC-8, and SOT-223 reversed-battery protection. Packages The MIC79050 is a fixed 4.2V device and comes in the Pulse Charging Capability thermally-enhanced MSOP-8, SOIC-8, and SOT-223 packages. The 8-lead versions also come equipped Applications with enable and feedback inputs. All versions are Li-Ion Battery Charger specified over the temperature range of 40C to Cellular Phones +125C. Palmtop Computers PDAs Self-Charging Battery Packs Package Types MIC79050 MIC79050 3-Lead SOT-223 (S) 8-Lead SOIC/MSOP (M/MM) GND EN GND 1 8 TAB IN GND 2 7 BAT 3 6 GND FB 4 5 GND 132 IN GND BAT 2017 Microchip Technology Inc. DS20005771A-page 1MIC79050 Typical Application Circuits Simplest Battery Charging Pulse-Charging Solution Application MIC79050-4.2YS Regulated or MIC79050-4.2YMM 4.2V 0.75% over Temp 4.2V 0.75% Regulated or unregulated IN BAT IN BAT unregulated Li-Ion wall adapter wall adapter Li-Ion EN FB Cell Cell External PWM* GND GND *See Applications Information Functional Block Diagrams 3-Lead Version V IN BAT V IN Bandgap Ref. Current Limit Thermal Shutdown MIC79050-4.2YS GND 8-Lead Version V IN BAT V IN FB Bandgap Ref. V REF EN Current Limit Thermal Shutdown MIC79050-4.2YM/YMM GND DS20005771A-page 2 2017 Microchip Technology Inc.