LTC4065LEDC#TRMPBF Linear Technology, LTC4065LEDC#TRMPBF Datasheet

IC CHARGER LI-ION 6-DFN

LTC4065LEDC#TRMPBF

Manufacturer Part Number
LTC4065LEDC#TRMPBF
Description
IC CHARGER LI-ION 6-DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4065LEDC#TRMPBF

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
3.75 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
6-WFDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6522118, 6700364.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Charge Current Programmable up to 250mA with
5% Accuracy
Complete Linear Charger in 2mm × × × × × 2mm DFN
Package
C/10 Charge Current Detection Output
Timer Termination
No External MOSFET, Sense Resistor or Blocking
Diode Required
Preset 4.2V Float Voltage with 0.6% Accuracy
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating
Charge Current Monitor Output for Gas Gauging
Automatic Recharge
Charges Single Cell Li-Ion Batteries Directly from
USB Port
20µA Supply Current in Shutdown Mode
Soft-Start Limits Inrush Current
Available Without Trickle Charge (LTC4065LX)
Tiny 6-Lead (2mm × 2mm) DFN Package
Multifunction Wristwatches
4.3V TO 5.5V
Charger for Li-Ion Coin Cell Batteries
Portable MP3 Players, Wireless Headsets
Bluetooth Applications
V
1µF
IN
C1
Standalone Li-Ion Battery Charger
R1
510Ω
U
V
CHRG
EN
CC
LTC4065L
PROG
GND
BAT
U
100mA
R3
2k
+
4065L TA01
4.2V
Li-Ion
BATTERY
Battery Charger in 2 × 2 DFN
DESCRIPTIO
The LTC
voltage linear charger for single-cell lithium-ion batteries.
Its small size and ability to accurately regulate low charge
currents make the LTC4065L especially well-suited for
portable applications using low capacity rechargeable
lithium-ion cells. Furthermore, LTC4065L is specifically
designed to work within USB power specifications.
The CHRG pin indicates when charge current has dropped
to ten percent of its programmed value (C/10). An internal
timer terminates charging according to battery manufac-
turer specifications.
No external sense resistor or blocking diode is required
due to the internal MOSFET architecture. Thermal feed-
back regulates charge current to limit the die temperature
during high power operation or high ambient temperature
conditions.
When the input supply (wall adapter or USB supply) is
removed, the LTC4065L automatically enters a low cur-
rent state, dropping battery drain current to less than 1µA.
With power applied, LTC4065L can be put into shutdown
mode, reducing the supply current to less than 20µA.
The full-featured LTC4065L also includes automatic re-
charge, low-battery charge conditioning (trickle charging)
and soft-start (to limit inrush current).
The LTC4065L is available in a tiny 6-lead, low profile
(0.75mm) 2mm × 2mm DFN package.
Standalone 250mA Li-Ion
®
4065L is a complete constant-current/constant-
Complete Charge Cycle (180mAh Battery)
110
100
50
40
90
80
70
60
30
20
10
0
0
CONSTANT
CURRENT
LTC4065L/LTC4065LX
0.5
V
R
CC
PROG
U
= 5V
1
= 2k
1.5
TIME (HOURS)
2
2.5
TERMINATION
3
CHRG
TRANSITION
CHARGE
CONSTANT
VOLTAGE
3.5
4065 TA02
4
4.5
4.3
4.1
3.9
3.7
3.5
3.3
4065lxfa
1

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LTC4065LEDC#TRMPBF Summary of contents

Page 1

... Portable MP3 Players, Wireless Headsets ■ Bluetooth Applications ■ Multifunction Wristwatches , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118, 6700364. U TYPICAL APPLICATIO Standalone Li-Ion Battery Charger ...

Page 2

LTC4065L/LTC4065LX ABSOLUTE AXI U RATI GS (Note < 1ms and Duty Cycle < 1% ................. – 0. Steady State ........................................... – 0. BAT, CHRG ................................................. –0. EN, ...

Page 3

ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are 5V 3.8V unless otherwise specified. (Note 2) CC BAT EN SYMBOL PARAMETER t Soft-Start Time ...

Page 4

LTC4065L/LTC4065LX W U TYPICAL PERFOR A CE CHARACTERISTICS Battery Regulation (Float) Voltage vs Battery Charge Current 4. 25°C 4. 800Ω PROG 4.22 4.21 4.20 4.19 4.18 4.17 4.16 50 100 200 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Lockout Threshold Voltage vs Temperature 4.00 3.75 RISE 3.50 3.25 FALL 3.00 2.75 2.50 – 100 –25 TEMPERATURE (°C) 4065L G16 EN Pin Current 4 ...

Page 6

LTC4065L/LTC4065LX CTIO S GND (Pin 1): Ground. CHRG (Pin 2): Open-Drain Charge Status Output. The charge status indicator pin has three states: pull-down, pulse at 2Hz and high impedance state. This output can be used ...

Page 7

W SI PLIFIED BLOCK DIAGRA + T DIE TA – 115° SHUTDOWN ENB – 0.82V REF 1.2V PROG 0. – C/10 R4 0.1V CHRG R5 2 – 2.9V LOBAT + BAT TRICKLE ...

Page 8

LTC4065L/LTC4065LX U OPERATIO The LTC4065L is a linear battery charger designed prima- rily for charging single cell lithium-ion batteries. Featuring an internal P-channel power MOSFET, the charger uses a constant-current/constant-voltage charge algorithm with programmable current. Charge current can be programmed ...

Page 9

U OPERATIO Undervoltage Lockout (UVLO) An internal undervoltage lockout circuit monitors the input voltage and keeps the charger in undervoltage lockout rises above 3.6V and approximately 80mV above until V CC the BAT pin voltage. The 3.6V UVLO circuit has ...

Page 10

LTC4065L/LTC4065LX U OPERATIO Charge Current Soft-Start and Soft-Stop The LTC4065L includes a soft-start circuit to minimize the inrush current at the start of a charge cycle. When a charge cycle is initiated, the charge current ramps from zero to the ...

Page 11

U OPERATIO POWER IS EN > SHUTDOWN ON THRESHOLD? SHUTDOWN MODE CHRG HIGH IMPEDANCE TRICKLE CHARGE MODE* 1/10 FULL CHARGE CURRENT CHRG STRONG PULL-DOWN 1/4 CHARGE CYCLE (1.125 HOURS) DEFECTIVE BATTERY IS V < 2.9V? BAT BAD BATTERY MODE NO ...

Page 12

LTC4065L/LTC4065LX U U APPLICATIO S I FOR ATIO Undervoltage Charge Current Limiting (UVCL) The LTC4065L includes undervoltage charge (∆V current limiting that prevents full charge current until the input supply voltage reaches approximately 200mV above the battery voltage. This feature ...

Page 13

U U APPLICATIO S I FOR ATIO In constant-current mode, the PROG pin is in the feedback loop, not the battery. Because of the additional pole created by the PROG pin capacitance, capacitance on this pin must be kept to ...

Page 14

LTC4065L/LTC4065LX U U APPLICATIO S I FOR ATIO Example: Consider an LTC4065L operating from a 5.5V wall adapter providing 250mA Li-Ion battery. The ambient temperature above which the LTC4065L will begin to reduce the 250mA charge current ...

Page 15

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 6-Lead Plastic DFN (2mm × ...

Page 16

... Synchronous Buck-Boost OUT DC/DC Converter TM LTC4411/LTC4412 Low Loss PowerPath LTC4413 Dual Ideal Diode in DFN ThinSOT and PowerPath are trademarks of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● COMMENTS TM Simple ThinSOT Charger, No Blocking Diode, No Sense Resistor Needed Low Current Version of LTC1734, 50mA ≤ ...

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