ADP5065 Fast Charge Battery Management with Power Path and USB Compatibility

The ADP5065 charger is fully compliant with the USB 2.0, USB 3.0, and USB Battery Charging Specification 1.1 and enables charging via the mini USB VBUS pin from a wall charger, car charger, or USB host port.

The ADP5065 operates from a 4 V to 5.5 V input voltage range but is tolerant of voltages of up to 20 V. This alleviates the concerns about the USB bus spiking during disconnect or connect scenarios.

The ADP5065 also features an internal FET between the dc-to-dc charger output and the battery. This permits battery isolation and, hence, system powering under a dead battery or no battery scenario, which allows for immediate system function on connection to a USB power supply.

Based on the type of USB source, which is detected by an external USB detection chip, the ADP5065 can be set to apply the correct current limit for optimal charging and USB compliance.

The ADP5065 comes in a very small and low profile 20-lead WLCSP (0.5 mm pitch spacing) package.

The overall solution requires only five small, low profile external components consisting of four ceramic capacitors (one of which is the battery filter capacitor), one multilayer inductor. In addition to these components, there is one optional dead battery situation default setting resistor. This configuration enables a very small PCB area to provide an integrated and performance enhancing solution to USB battery charging and power rail provision.

APPLICATIONS

Digital still cameras
Digital video cameras
Single cell Li-Ion portable equipment
PDA, audio, GPS devices
Mobile phones

Features and Benefits

3 MHz switch mode charger
1.25 A charge current from dedicated charger
Up to 680 mA charging current from 500 mA USB Host
Operating input voltage from
4.0 V up to 5.5V
Tolerant input voltage −0.5 V to +20 V (USB VBUS)
Dead battery isolation FET between battery and charger output
Battery thermistor input with automatic charger shutdown for when battery temperature exceeds limits

Compliant with the JEITA Li-Ion battery charging temperature specification
SYS_EN_OK flag to hold off system turn-on until battery is at minimum required level for guaranteed system startup due to minimum battery voltage and/or minimum battery charge level requirements
EOC programming with C/20, C/10 and specific current level selection