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| LTC3447_15 Datasheet, PDF (16/16 Pages) Linear Technology – I2C Controllable Buck Regulator | |||
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LTC3447
TYPICAL APPLICATIO
Li-Ion Battery to 1.4V/1V Regulator
Li Ion
BATTERY
20k
CIN
4.7mF
VIN
FB
SW
LTC3447
I2C BUS VCCD
PWREN
PGOOD
RUN
VOUT
10k 10k
VCCD
4.7mF
SDA
SDA
SCL
SCL
GND
EXPOSED PADDLE
TO GROUND
L1
3.3mH
VOUT
=
1.4V AT 500mA IN NORMAL OPERATION
1V AT 200mA IN STBY MODE
COUT
4.7mF
CIN, COUT: TDK C1608X5R0J475MT
L1: SUMIDA CDRH3D16-3R3
3447 TA02
RELATED PARTS
PART NUMBER
LT1761
LT1762
LT1763
LTC1844
LT1962
LT3020
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407
LTC3411
LTC3412
LTC3445
LTC3455
LTC4055
LTC4411/LTC4412
DESCRIPTION
100mA, Low Noise Micropower, LDO
150mA, Low Noise Micropower, LDO
500mA, Low Noise Micropower, LDO
150mA, Very Low Dropout LDO
300mA, Low Noise Micropower, LDO
Low VIN (0.9V) Low VOUT (0.2V) VLDOTM
300mA (IOUT), 1.5MHz Synchronous Step-Down
DC/DC Converter
600mA (IOUT), 1.5MHz Synchronous Step-Down
DC/DC Converter
Dual 600mA, 1.5MHz Synchronous Step-Down
DC/DC Converter
1.25A (IOUT), 4MHz Synchronous Step-Down
DC/DC Converter
2.5A (IOUT), 4MHz Synchronous Step-Down
DC/DC Converter,
600mA, 1.5MHz Synchronous Step-Down DC/DC Converter
with Two LDOs and PowerPathTM Manager
Dual DC/DC Converter with USB Power Manager and
Li-Ion Battery Charger
USB Power Manager and Li-Ion Battery Charger
PowerPath Controllers in ThinSOT
COMMENTS
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, Dropout Voltage = 0.30V,
IQ = 20µA, ISD < 1µA, VOUT = Adj, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V,
3.3V, 5V, ThinSOTTM Package. Low Noise < 20µVRMS(P-P), Stable
with 1µF Ceramic Capacitors
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, Dropout Voltage = 0.30V,
IQ = 25µA, ISD < 1µA, VOUT = Adj, 2.5V, 3V, 3.3V, 5V, MS8
Package. Low Noise < 20µVRMS(P-P)
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, Dropout Voltage = 0.30V,
IQ = 30µA, ISD < 1µA, VOUT = 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V, S8
Package. Low Noise < 20µVRMS(P-P)
VIN: 6.5V to 1.6V, VOUT(MIN) = 1.25V, Dropout Voltage = 0.08V,
IQ = 40µA, ISD < 1µA, VOUT = Adj, 1.5V, 1.8V, 2.5V, 2.8V, 3.3V,
ThinSOT Package. Low Noise < 30µVRMS(P-P), Stable with 1µF
Ceramic Capacitors
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, Dropout Voltage = 0.27V,
IQ = 30µA, ISD < 1µA, VOUT = 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V, MS8
Package. Low Noise < 20µVRMS(P-P)
VIN: 0.9V to 10V, VOUT(MIN) = 0.20V, Dropout Voltage = 0.15V,
IQ = 120µA, ISD < 1µA, VOUT = Adj, DFN Package
VIN: 2.5V to 5.5V, VOUT(MIN) = 0.8V, IQ = 20µA, ISD < 1µA, ThinSOT
Package
VIN: 2.5V to 5.5V, VOUT(MIN) = 0.6V, IQ = 20µA, ISD < 1µA, ThinSOT
Package
VIN: 2.5V to 5.5V, VOUT(MIN) = 0.6V, IQ = 40µA, ISD < 1µA, MS10E,
QFN Packages
VIN: 2.5V to 5.5V, VOUT(MIN) = 0.8V, IQ = 60µA, ISD < 1µA, MS10
Package
VIN: 2.5V to 5.5V, VOUT(MIN) = 0.8V, IQ = 60µA, ISD < 1µA,
TSSOP16E Package
VIN: 2.5V to 5.5V, VOUT = 0.85V to 1.55V, IQ = 27µA, ISD < 1µA,
Two LDOs I2C Interface, Back-Up Battery Management, QFN24
VIN: 3V to 5.5V, Seamless Transition Between Input Sources and
Li-Ion Battery, USB, 5V Wall Adapter, QFN24 Package
Standalone Charger, Automatic Switchover when Input Supply
is Removed
More Efï¬cient than Diode ORing
ThinSOT, VLDO and PowerPath are trademarks of Linear Technology Corporation.
3447f
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 â FAX: (408) 434-0507 â www.linear.com
LT/TP 0505 500 ⢠PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
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