LP4069-01 Oct.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8
Preliminary Datasheet LP4069
800mA Single Chip Li-Ion and Li-Polymer Charger
General Description
The LP4069 is a complete constant-current/ constant
voltage linear charger for single cell lithium-ion battery.
Its SOT23-6/TDFN-8 package and low external
component count make the LP4069 ideally suited for
portable applications. No external sense resistor is
needed, and no blocking diode is required due to the
internal 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 ISET
programmed externally with a single resistor.
The LP4069 automatically terminates the charge cycle
when the charge current drops to 1/10 setting current
value after the final float voltage is reached.
When the input supply is removed, the LP4069
automatically enters a low current state, dropping the
battery drain current to less than 1µA.
Other features include charge current monitor, under
voltage lockout, automatic recharge and a status pin.
Order Information
LP4069
F: Pb-Free
Package Type
B6: SOT23-6
QV: TDFN-8
Features
Input Voltage up to 28V
Input Over Voltage Protection：7V
Short-circuit protection
Programmable Charge Current up to 800mA
1µA Battery Reverse Current
Protection of Reverse Connection of Battery
No MOSFET, Sense Resistor or Blocking Diode
Required
Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
SOT23-6/TDFN-8（2*2mm） Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Portable Media Players/Game
Power Bank
Bluetooth Applications
PDA/MID
Marking Information
Device
Marking
Package
Shipping
LP4069B6F
LP4069
YWX
SOT23-6
3K/REEL
LP4069QVF
LP4069
YWX
TDFN-8
4K/REEL
Marking indication:
Y:Production year W:Production week X: Series Number
LP4069-01 Oct.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8
Preliminary Datasheet LP4069
Functional Pin Description
Package Type
LP4069B6F
LP4069QVF
Pin
Configurations
1
3
6
4
CHRG
ISET
SOT23-6
TOP VIEW
2
GND
BAT
VIN
5
FULL
VIN
FULL
CHRG
BAT
ISET
NC
1
2
3
Exposed
Pad
EN
4
8
7
6
5
GND
Pin Description
NAME
Pin
DESCRIPTION
SOT23-6
TDFN-8
CHRG
1
3
Open-Drain Charge Status Output. When the battery is charging, the CHRG
pin is pulled low by an internal NMOS. When the charge cycle is completed,
the pin could be pulled High by an external pull high resistor.
GND
2
5
GND is the connection to system ground.
BAT
3
8
BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is
needed for stability when there is no battery attached. When a battery is
attached, only a 1uF ceramic capacitor is required.
VIN
4
1
VIN is the input power source. Connect to a wall adapter.
FULL
5
2
Open-Drain Charge Status Output. When the battery is charging, the FULL pin could
be pulled High by an external pull high resistor. When the charge cycle is completed,
the pin is pulled Low by an internal N-channel MOSFET.
ISET
6
7
Charge Current Program. The charge current is programmed by connecting
a 1% resistor(R
ISET
) to ground.
EN
4
Charge Enable Input (active low).
NC
6
No Connector.