LP78071 Datasheet, PDF (1/16 Pages) Lowpower Semiconductor inc – Programmable Charge Current Up to 1000mA

Preliminary Datasheet
LP78071
1A Charge+ 1.5A Synchronous Boost PMIC
General Description
The LP78071 is a PMIC，which has 1ch Charger and
1ch Synchronous Boost Converter with ESOP-8 and
TDFN10 package.
Its charger is a complete constant-current constant
voltage linear charger for single cell lithium-ion
batteries. Furthermore, the LP78071 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 can be
ISET rammed externally with a single resistor. 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 LP78071 automatically enters a low
current state, dropping the battery drain current to less
than 4µA.
Other features include charge current monitor, 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 3A
Current power MOSFET makes this converter highly
power efficiently. Selectable high switching frequency
allows faster loop response and easy filtering with a
low noise output. The non-inverting input and its error
amplifier is connected to an internal 800mV precision
reference voltage.
Order Information
LP78071
□□ □
F: Pb-Free
Package Type
SP: ESOP-8
QV:TDFN-10
Features
 Charger:
 Programmable Charge Current Up to 1000mA
 No MOSFET, Sense Resistor or Blocking
Diode Required
 Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
 Charges Single Cell Li-Ion Batteries Directly
from USB Port
 8µA Supply Current in Shutdown
 Drainage Charge Current Thermal Regulation
Status Outputs for LED or System Interface
 Boost:
 1.5A Output Current Synchronous Boost
Converter
 600KHz fixed frequency switching
 High Switch On Current: 3A
 Low RDS(ON) Integrated Power Mosfet
 Efficiency is 94%
 Built-in OVP, OTP, OCP, Soft-Star
 Consumption Available in ESOP-8 Package
 RoHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device
LP78071SPF
LP78071QVF
Marking
Package
SP:ESOP-8
QV:TDFN10
Shipping
3K/REEL
Applications
 MID/Pad
 Power Bank
 Smart Phone
 Bluetooth Applications
LP78071 – 00 Version 1.0 Feb.-2014 Email: [e-mail] www.lowpowersemi.com Page 1 of 16