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PDF LTC4066 Data sheet ( Hoja de datos )
| Número de pieza | LTC4066 | |
| Descripción | USB Power Controller and Li-Ion Linear Charger | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC4066 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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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
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LTC4066w/wLwT.DCataS4he0et46U.c6om-1
Input Supply Current
vs Temperature
900
VIN = 5V
800 VBAT = 4.2V
RPROG = 100k
700 RCLPROG = 2k
600
500
400
300
200
100
0
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
4066 G01
Input Current Limit vs
Temperature, HPWP = 5V
525
VIN = 5V
VBAT = 3.7V
515
RPROG = 100k
RCLPROG = 2k
505
495
485
475
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4066 G04
PROG Pin Voltage vs Temperatrue
1.020
VIN = 5V
1.015 RPROG = 100k
1.010
1.005
1.000
0.995
0.990
0.985
0.980
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
4066 G07
Input Supply Current vs
Temperature (Suspend Mode)
60
VIN = 5V
VBAT = 4.2V
50 RPROG = 100k
RCLPROG = 2k
SUSP = 5V
40
30
20
10
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4066 G02
Input Current Limit vs
Temperature, HPWR = 0V
110
VIN = 5V
108 VBAT = 3.7V
106
RPROG = 100k
RCLPROG = 2k
104
102
100
98
96
94
92
90
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
4066 G05
VFLOAT Load Regulation
4.300
4.250
RPROG = 34k
TA = 25°C
4.200
LTC4066
4.150
4.100
LTC4066-1
4.050
4.000
0
250 500 750 1000 1250 1500
IBAT (mA)
4066 G08
Battery Drain Current vs
Temperature (BAT Powers OUT,
No Load)
70
VIN = 0V
60 VBAT = 4.2V
50
40
30
20
10
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
4066 G03
CLPROG Pin Voltage vs
Temperature
1200
1000
VIN = 5V
RCLPROG = 2k
HPWR = 5V
800
600
400
HPWR = 0V
200
0
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
4066 G06
Battery Regulation (Float)
Voltage vs Temperature
4.220
VIN = 5V
4.200
LTC4066
4.180
4.160
4.140
4.120
4.100
LTC4066-1
4.080
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
4066 G09
4066fc
5
5 Page 
LTC4066w/wLwT.DCataS4he0et46U.c6om-1
BLOCK DIAGRAM
CLDIS
10
IIN
1000
CLPROG
22
100k
CURRENT LIMIT DISABLE
2μA
1V +
CL
–
CURRENT CONTROL
DIE
TEMP
VBUS
9
IN
SOFT-START
ILIM
CURRENT LIMIT
IN ILIM CNTL
ENABLE
105°C
1,3,8
OUT
–+
25mV
IDEAL
DIODE
OUT CHARGER
CC/CV REGULATOR
ENABLE
HPWR
13
500mA/100mA
2μA
–+
TA
IN OUT BAT
2,4,5
BAT
BAT
–
CP
+
POL
19
PROG
23
100k
WALL
20
+
1.25V
ACPR
17
–
+
CHG
–
1V
15 VNTC
100k
NTC
14
100k
–
TOOCOLD
+
NTC
–
TOOHOT
+
+
0.1V –
NTC ENABLE
CHARGE CONTROL
SOFT-START2
CHRG
BAT UV
VOLTAGE DETECT
UVLO
NTCERR
CONTROL LOGIC
BAT UV
RECHRG
HOLD
RESET
OSCILLATOR
CLK
COUNTER
STOP
+
– 0.25V
+ 2.9V
BATTERY
UVLO
–
4.1V
+
RECHARGE
(4.0V
LTC4066-1)
–
TIMER
21
CHRG
18
0.1V
|IBAT|
1000
+
EOC
–
2μA 2μA
GND
16
SHDN
SUSP
12 11
ISTAT
24
2k
4066 BD
4066fc
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet LTC4066.PDF ] | |
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