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LTC4067EDE Datasheet(PDF) 1 Page - Linear Technology

Part # LTC4067EDE
Description  USB Power Manager with OVP and Li-Ion/Polymer Charger
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4067EDE Datasheet(HTML) 1 Page - Linear Technology

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LTC4067
1
4067f
USB Power Manager
with OVP and
Li-Ion/Polymer Charger
The LTC®4067 is a USB power management and Li-Ion/
Polymer battery charger designed for portable battery
powered applications. The part controls total current used
by the USB peripheral for operation and battery charging.
The total input current may be left unregulated, or it may
be limited to 20% or 100% of the programmed value up
to 1.5A (typically 500mA). Battery charge current is au-
tomatically reduced such that the sum of the load current
and the charge current does not exceed the programmed
input current.
With the addition of an external P-channel MOSFET the
LTC4067 can withstand voltages up to 13V.
The LTC4067 includes a complete constant current/con-
stant voltage linear charger for single cell Li-Ion batteries.
The float voltage applied to the battery is held to a tight
0.4% tolerance, and charge current is programmed using
an external resistor to ground. An end-of-charge status
output, ⎯C⎯H⎯R⎯G, indicates full charge. Also featured is an
NTC thermistor input used to monitor battery temperature
while charging.
The LTC4067 is available in a 12-lead low profile 4mm ×
3mm DFN package.
Programmable Input Current Limit:
Single Resistor at CLPROG Pin to Set and Monitor
Input Current
Battery Charger/Ideal Diode/Controller:
13V Overvoltage Protection
Full Featured Battery Charger with 4.2V Float
Up to 1.25A Programmable Charge Current
Thermal Regulation Maximizes Charge Current
Without Risk of Overheating
Internal 2 Hour Termination Timer from Onset of
Voltage Mode Charging
Automatic Load Switchover to Battery Power with
Internal Ideal Diode and Drive Output for Optional
External MOSFET
NTC Thermistor Input
Bad Battery Time-Out Detection
4mm × 3mm 12-Lead DFN Package
FEATURES
DESCRIPTIO
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Automatic Battery Charging/Load Switchover
Backup Battery Charger
Uninterrupted Supplies
APPLICATIO S
2k
10
μF
LTC4067
OVI
OUT
OVP
1-CELL
Li-Ion
ILOAD
2k
IN
BAT
ILIM0
PROG
ILIM1
CLPROG
GND
WALL
OR
USB
10
μF
10nF
1
μF
4067 TA01
CHRG
ILIM0 ILIM1 IIN(MAX)
L
L
H
H
H
L
H
L
O (SUSPEND)
200V/RCLPROG
1000V/RCLPROG
FIXED (2A)
4067 TA01b
1ms/DIV
VOVP
5V/DIV
VOUT
5V/DIV
IIN
500mA/DIV
VOVI
5V/DIV
5V TO 12V
VBAT = 4.2V
OVP Response to Ramp Input at OVI


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