Preliminary Datasheet
LP78092
1A Charge And
Dual Channel Ultra-Fast CMOS LDO Regulator
General Description
The LP78092 is a PMIC，which has 1ch Charger and
2ch LDO with TQFN16 package.
Its charger is a complete constant-current constant
voltage linear charger for single cell lithium-ion
batteries. 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 LP78092 automatically enters a low
current state, dropping the battery drain current to less
than 8µA.
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.
The LP78092 contains a dual channel, low noise, and
low dropout regulator sourcing up to 600mA at each
channel. The range of output voltage is from 0.81V to
Vin by operating from 2.5V to 6.5V input.
LP78092 offers 2% accuracy, extremely low dropout
voltage (280mV @ 400mA), and extremely low ground
current, only 75μA per LDO. The shutdown current is
near zero current which is suitable for battery-power
devices. Other features include current limiting, over
temperature, output short circuit protection.
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 Leakage Current in Shutdown
Drainage Charge Current Thermal Regulation
Status Outputs for LED or System Interface
LDO:
Wide Operating Voltage Ranges : 2.5V to 6.0V
Low-Noise for RF Applications
High PSRR: -68dB at 1kHz
No Noise Bypass Capacitor Required
Dual LDO Outputs (280mV/400mA)
Ultra-low Quiescent Current 75uA
Built-in Short-Circuit Protection
Consumption Available in TQFN-16 Package
RoHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device
Marking
Package
QV:TQFN16
Shipping
3K/REEL
Order Information
LP78092
□ □
□
F: Pb-Free
Package Type
QV:TQFN-16
LP78092QVF
Applications
MID/Pad
Power Bank
Smart Phone
Bluetooth Applications
LP78092 – 00
Version 1.0
Feb.-2014
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 10
Preliminary Datasheet
LP78092
Functional Pin Description
Pack ag e Typ e
Pin C o n f i g u rat i o n s
CE CHRG STDBY BAT
15
13
16
14
SET
FB1
1
2
GND
3
4
5
6
7
8
12 BVIN
11 BVIN
10 FB2
9 EN2
TQFN-16
EN1
GND
LVIN1 LOUT1 LVIN2 LOUT2
TOP VIEW
Pin Description
PIN No.
PIN
DESCRIPTION
Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is pro-
1
SET
grammed by connecting a 1% resistor(R
PROG
)to ground. When charging in constant-current mode, this
pin servos to 2V. In all modes, the voltage on this pin can be used to measure the charge current
using the following formula.LP78092: Iset=1000/R
PROG
.
2
3
4
5
6
7
8
9
10
11,12
13
14
15
16
FB1
EN1
GND
LVIN1
LOUT1
LVIN2
LOUT2
EN2
FB2
BVIN
BAT
STDBY
CHRG
CE
Feedback pin for channel 1 LDO. The reference voltage is 0.8V.
Enable pin for channel 1 LDO. Active high.
Ground pin.
Power supply for channel 1 LDO.
Output pin of Channel 1 LDO.
Power supply for channel 2 LDO.
Output pin of Channel 2 LDO.
Enable pin for channel 2 LDO. Active high.
Feedback pin for channel 2 LDO. The reference voltage is 0.8V.
BVIN is the input power source for charger. Connect to a wall adapter.
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 0.1µF ceramic capacitor is required.
Open-Drain Complete Status Output. When the battery is charging, the STAT pin is pulled high by an
internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled Low.
Open-Drain Charge Status Output. When the battery is charging, the STAT pin is pulled low by an
internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled High.
Enable charger pin. Active high.
LP78092 – 00
Version 1.0
Feb.-2014
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 2 of 10
Preliminary Datasheet
LP78092
Absolute Maximum Ratings
Input Voltage to GND (LVIN1/2，BVIN) ------------------------------------------------------------------------ -0.3V to 6.5V
VOUT1/2 ------------------------------------------------------------------------------------------------------------------ -0.3V to 6V
BAT, SET, STAT, EN, CE ----------------------------------------------------------------------------------- -0.3V to VIN+0.3V
BAT Short-Circuit Duration -------------------------------------------------------------------------------------------- Continuous
BAT Pin Current ------------------------------------------------------------------------------------------------------------ 1200mA
Maximum Junction Temperature -------------------------------------------------------------------------------------------- 125°C
Operating Junction Temperature Range (T
J
) ------------------------------------------------------------------ -40℃ to 85°C
Maximum Soldering Temperature (at leads, 10 sec) ------------------------------------------------------------------- 260°C
Thermal Information
Maximum Power Dissipation (P
D
,T
A
<40°C) ------------------------------------------------------------------------------ 1.5W
Thermal Resistance (J
A
) ---------------------------------------------------------------------------------------------------- 68℃/W
LP78092 – 00
Version 1.0
Feb.-2014
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 5 of 10
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