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Linear Technology Electronic Components Datasheet

LTC4066EUF Datasheet

USB Power Controller and Li-Ion Linear Charger

No Preview Available !

FEATURES
n Seamless Transition Between Input Power Sources:
Li-Ion Battery, USB and 5V Wall Adapter
n Low Loss (50mΩ) Ideal Diode Path from BAT to OUT
n Programmable Charge Current Detection (CHRG)
n Load Dependent Charging Guarantees USB Input
Current Compliance
n Analog Gas Gauge Function
n Charges Single Cell Li-Ion Batteries Directly from
USB Port
n Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating*
n Selectable 100% or 20% Current Limit
(e.g., 500mA/100mA)
n Termination Timer Adapts to Actual Charge Current
n Preset 4.2V Charge Voltage with 0.8% Accuracy
(4.1V for LTC4066-1)
n NTC Thermistor Input for Temperature Qualified
Charging
n Thin Profile (0.75mm) 24-Lead 4mm × 4mm
QFN Package
n Ultrathin Profile (0.55mm) 24-Lead 4mm × 4mm
UTQFN Package (LTC4066 Only)
APPLICATIONS
n Portable USB Devices
n GPS, Cameras, Broadband Wireless Modems
n Mulitple Input Chargers
LTC4066w/wLwT.DCataS4he0et46U.c6om-1
USB Power Controller and
Li-Ion Linear Charger with
Low Loss Ideal Diode
DESCRIPTION
The LTC®4066/LTC4066-1 are USB power managers and
Li-Ion battery chargers designed to work in portable
battery-powered applications. The parts control the total
current used by the USB peripheral for operation and
battery charging. The total input current can be limited
to 100mA, 500mA or “unlimited” (i.e., above 2A). Battery
charge current is automatically reduced such that the sum
of the load current and the charge current does not exceed
the programmed input current limit.
The LTC4066/LTC4066-1 include a standalone constant-
current/constant-voltage linear charger for single cell
Li-ion batteries. The float voltage applied to the battery
is held to a tight 0.8% tolerance, and charge current
is programmable using an external resistor to ground.
A programmable end-of-charge status output (CHRG)
indicates full charge. BAT pin charge and discharge cur-
rents can be monitored via an analog output (ISTAT). Total
charge time is programmable by an external capacitor to
ground. When the battery drops 100mV below the float
voltage, automatic recharging of the battery occurs. Also
featured is an NTC thermistor input used to monitor bat-
tery temperature while charging.
The LTC4066/LTC4066-1 are available in a 24-pin thin
profile (0.75mm) 4mm × 4mm QFN package. The LTC4066
is also available in a 24-pin ultrathin profile (0.55mm)
4mm × 4mm UTQFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners. *Protected by U.S. Patents including 6522118.
TYPICAL APPLICATION
5V (NOM)
FROM USB
CABLE VBUS
4.7μF
SUSPEND USB POWER
500mA/100mA SELECT
INPUT CURRENT
LIMIT DISABLE
IN
VNTC
NTC
WALL
SHDN
LTC4066
SUSP
HPWR
CLDIS
TIMER PROG CLPROG
OUT
BAT +
CHRG
ACPR
POL
ISTAT
GND
510Ω 510Ω
TO ADC FOR
GAS GAUGE
0.1μF
100k 2k
2k
4066 TA01
TO LDOs,
REGs, ETC
4.7μF
600
500
IIN
400
ILOAD
300
200
IBAT
CHARGING
100
0
–100
0
100 200 300 400 500 600
ILOAD (mA)
IBAT
(IDEAL DIODE)
4066 TA02
4066fc
1


Linear Technology Electronic Components Datasheet

LTC4066EUF Datasheet

USB Power Controller and Li-Ion Linear Charger

No Preview Available !

LTC4066/LTC4066-1
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS (Notes 1 to 6)
Terminal Voltage
t < 1ms and Duty Cycle < 1%
IN, OUT ................................................... –0.3V to 7V
Steady State
IN, OUT, BAT ........................................... –0.3V to 6V
NTC, VNTC, TIMER, PROG,
CLPROG, ISTAT ....................... –0.3V to (VCC + 0.3V)
CHRG, HPWR, SUSP, SHDN,
WALL, ACPR, POL, CLDIS ...................... –0.3V to 6V
Pin Current (DC)
IN (Note 7).......................................................... 2.7A
OUT, BAT (Note 7) .................................................. 5A
Operating Temperature Range................. –40°C to 85°C
Maximum Operating Junction Temperature ......... 125°C
Storage Temperature Range.................. –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT 1
BAT 2
OUT 3
BAT 4
BAT 5
NC 6
24 23 22 21 20 19
18 CHRG
17 ACPR
16 GND
25
15 VNTC
14 NTC
13 HPWR
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm s 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN #) IS GND, MUST BE SOLDERED TO PCB
OUT 1
BAT 2
OUT 3
BAT 4
BAT 5
NC 6
24 23 22 21 20 19
18 CHRG
17 ACPR
16 GND
25
15 VNTC
14 NTC
13 HPWR
7 8 9 10 11 12
PF PACKAGE
24-LEAD (4mm s 4mm) PLASTIC UTQFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN #) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4066EUF#PBF
LTC4066EUF#TRPBF
4066
24-Lead (4mm × 4mm) Plastic QFN
LTC4066EUF-1#PBF
LTC4066EUF-1#TRPBF 40661
24-Lead (4mm × 4mm) Plastic QFN
LTC4066EPF#PBF
LTC4066EPF#TRPBF
4066T
24-Lead (4mm × 4mm) Plastic UTQFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
4066fc
2


Part Number LTC4066EUF
Description USB Power Controller and Li-Ion Linear Charger
Maker Linear
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