General Description
The MIC79050 is a simple single-cell lithium-ion battery
charger. It includes an on-chip pass transistor for high
precision charging. Featuring ultra-high precision
(±0.75% over the Li-ion battery charging temperature
range) and “zero” off-mode current, the MIC79050
provides a very simple, cost effective solution for
charging lithium-ion battery.
Other features of the MIC79050 include current-limit
and thermal shutdown protection. In the event the input
voltage to the charger is disconnected, the MIC79050
also provides minimal reverse-current and
reversed-battery protection.
The MIC79050 is a fixed 4.2V device and comes in the
thermally-enhanced MSOP-8, SOIC-8, and SOT-223
packages. The 8-lead versions also come equipped
with enable and feedback inputs. All versions are
specified over the temperature range of –40°C to+125°C.

Features
• High-Accuracy Charge Voltage: ±0.75% over
–5°C to + 60°C (Li-ion charging temperature range)
• Zero Off-Mode Current
• 10 μA Reverse Leakage
• Ultra-Low 380 mV Dropout at 500 mA
• Wide Input Voltage Range
• Logic-Controlled Enable Input (8-Lead Devices Only)
• Thermal Shutdown and Current-Limit Protection
• Power MSOP-8, Power SOIC-8, and SOT-223 Packages
• Pulse Charging Capability

Applications
• Li-Ion Battery Charger
• Cellular Phones
• Palmtop Computers
• PDAs
• Self-Charging Battery Packs