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