CYT5016
Description
Features
CYT5016 is a complete constant-current &
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Programmable Charge Current Up to 800mA.
No MOSFET, Sense Resistor or Blocking
Diode Required.
constant voltage linear charger for single cell
lithium-ion batteries. Its SOT package and low
external component count make CYT5016 ideally
suited for portable applications. Furthermore, the
CYT5016 is specifically designed to work within USB
power specification. At the same time, CYT5016
can also be used in the standalone lithium-ion
battery charger.
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Constant-Current/Constant-Voltage Operation
with Thermal Protection to Maximize Charge
Rate without Risk of Overheating.
Charges Single Cell Li-Ion Batteries Directly
from USB Port.
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No external sense resistor is needed, and no
blocking diode is required due to the internal
Preset 4.2V Charge Voltage with ±1%
Accuracy.
MOSFET architecture.
Thermal feedback
regulates the charge current to limit the die
temperature during high power operation or high
ambient temperature. The charge voltage is fixed
at 4.2V, and the charge current can be programmed
externally with a single resistor. The CYT5016
automatically terminates the charge cycle when the
charge current drops to 1/10th the programmed
value after the final float voltage is reached.
When the input supply (wall adapter or USB
supply) is removed, the CYT5016 automatically
enters a low current stage, dropping the battery
drain current to less than 2uA. The CYT5016 can
be put into shutdown mode, reducing the supply
current to 25uA.
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25uA Supply Current in Shutdown.
2.9V Trickle Charge Threshold
Available Without Trickle Charge.
Soft-Start Limits Inrush Current.
Available in 5-Lead SOT-23 Package.
Application
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Cellular Telephones, PDA’s, MP3 Players.
Charging Docks and Cradles
Bluetooth Applications
Other features include charge current monitor,
undervoltage lockout, automatic recharge and a
status pin to indicate charge termination and the
presence of an input voltage.
Application Diagram
Pin Configuration
Preliminary and all contents are subject to change without prior notice
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