LP78073 Datasheet, PDF (1/9 Pages) Lowpower Semiconductor inc – Fixed Charge Current 700mA

Preliminary Datasheet
LP78073
700mA Charge + 1A Synchronous Boost PMIC
General Description
The LP78073 is a PMIC，which has 1ch Charger and
1ch Synchronous Boost Converter with ESOP-8
package.
Its charger is a complete constant-current constant
voltage linear charger for single cell lithium-ion
batteries. Furthermore, the LP78073 is specifically
designed to work within USB power specifications. 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 is fixed
to 700mA. The charger automatically terminates the
charge cycle when the charge current drops to 1/10th
the ISET rammed value after the final float voltage is
reached. When the input supply (wall adapter or USB
supply) is removed, the LP78073 automatically enters
a low current state, dropping the battery drain current
to less than 180µA.
Other features include charge current monitor, short
current protection, under voltage lockout, automatic
recharge and a status pin to indicate charge
termination and the presence of an input voltage.
Boost converter is Synchronous current mode boost
DC-DC converter. Its PWM circuitry with built-in 2A
Current power MOSFET makes this converter highly
power efficiently. The non-inverting input and its error
amplifier is connected to an internal 1000mV precision
reference voltage.
Order Information
LP78073 □ □ □
F: Pb-Free
Package Type
SP: ESOP-8
Features
 Charger:
 Fixed Charge Current 700mA
 No MOSFET, Sense Resistor or Blocking
Diode Required
 Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
 Boost:
 1.0A Output Current Synchronous Boost
Converter at VIN=3V
 900KHz fixed frequency switching
 High Switch On Current: 2A
 Low RDS(ON) Integrated Power Mosfet
 Efficiency is 96%
 Built-in OVP, OTP, OCP, Soft-Star
 Low Standby Current Less Than 180uA
 Few External Component Reduce Cost
 Consumption Available in ESOP-8 Package
 RoHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device
Marking Package Shipping
LP78073SPF
SP: ESOP-8 3K/REEL
Applications
 MID/Pad
 Power Bank
 Smart Phone
 Bluetooth Applications
LP78073 – 00 Version 1.0 Feb.-2014 Email: [e-mail] www.lowpowersemi.com Page 1 of 9