LTC4080
22
4080fc
For more information www.linear.com/LTC4080
LINEAR TECHNOLOGY CORPORATION 2006
LT 0715 REV C • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC4080
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
Battery Chargers
LTC3550
Dual Input USB/AC Adapter Li-Ion Battery Charger
with Adjustable Output 600mA Buck Converter
Synchronous Buck Converter, Efficiency: 93%, Adjustable Output: 600mA,
Charge Current: 950mA Programmable, USB Compatible, Automatic Input Power
Detection and Selection
LTC3550-1
Dual Input USB/AC Adapter Li-Ion Battery Charger
with 600mA Buck Converter
Synchronous Buck Converter, Efficiency: 93%, Output: 1.875V at 600mA,
Charge Current: 950mA Programmable, USB Compatible, Automatic Input Power
Detection and Selection
LTC4053-4.2
USB Compatible Monolithic Li-Ion Battery Charger
Standalone Charger with Programmable Timer, Up to 1.25A Charge Current
LTC4054-4.2 Standalone Linear Li-Ion Battery Charger with
Integrated Pass Transistor in ThinSOT
TM
Thermal Regulation Prevents Overheating, C/10 Termination,
LTC4061 Standalone Li-Ion Charger with Thermistor
Interface
4.2V, ±0.35% Float Voltage, Up to 1A Charge Current, 3mm x 3mm DFN
LTC4061-4.4 Standalone Li-Ion Charger with Thermistor
Interface
4.4V (Max), ±0.4% Float Voltage, Up to 1A Charge Current,
3mm x 3mm DFN
LTC4062 Standalone Linear Li-Ion Battery Charger with
Micropower Comparator
Up to 1A Charge Current, Charges from USB Port, Thermal Regulation 3mm x
3mm DFN
LTC4063 Li-Ion Charger with Linear Regulator Up to 1A Charge Current, 100mA, 125mV LDO, 3mm x 3mm DFN
Power Management
LTC3405/
LTC3405A
300mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 2.7V to 6V, V
OUT
= 0.8V, IQ = 20µA, I
SD
< 1µA, ThinSOT
Package
LTC3406/
LTC3406A
600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.6V, IQ = 20µA, I
SD
< 1µA, ThinSOT
Package
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT
= 0.8V, IQ = 60µA, I
SD
< 1µA, MS
Package
LTC3440 600mA (I
OUT
), 2MHz, Synchronous Buck-Boost
DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT
= 2.5V, IQ = 25µA, I
SD
< 1µA, MS
Package
LTC4411/LTC4412 Low Loss PowerPath
TM
Controller in ThinSOT Automatic Switching Between DC Sources, Load Sharing, Replaces ORing Diodes
LTC4413 Dual Ideal Diode in DFN 2-Channel Ideal Diode ORing, Low Forward On-Resistance, Low Regulated
Forward Voltage, 2.5V ≤ V
IN
≤ 5.5V
Li-Ion Battery Charger with 1.5V Buck Regulator
Buck Efficiency vs Load Current
(V
OUT
= 1.5V)
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
60
80
0.1 10 1001 1000
20
0
100
0
10
100
0.1
0.01
1000
4080 G13
V
BAT
= 3.8V
V
OUT
= 1.5V
L = 10μH
C = 4.7μF
EFFICIENCY
(Burst)
POWER LOSS
(Burst)
EFFICIENCY
(PWM)
POWER
LOSS
(PWM)
D1
500mA
C
BAT
4.7μF
R3
510Ω
R
PROG
806Ω
R2
806k
C
OUT
4.7μF
4080 TA02
C
PL
10pF
R1
715k
LTC4080
V
CC
ACPR
EN_CHRG
MODE
CHRG
BAT
EN_BUCK
SW
FB
PROG
V
OUT
(1.5V/300mA)
L1, 1OμH*
GND
D2
*COILCRAFT LPO1704-103M
R4
510Ω
C
IN
4.7μF
V
CC
(3.75V
to 5.5V)
4.2V
Li-Ion
BATTERY
+
