Datasheet LTC3446 (Analog Devices) - 20

LTC3446
Typical applicaTion
L1 1.8µH VOUT VIN VIN SW 1.8V 2.9V TO 5.5V 22µF 22µF 59k 400mA MAX X7R X7R BUCKFB 47.5k LTC3446 LVIN VOUT PGOOD LVOUT1 1.5V DIGITAL MODESEL 2.2µF 110k 300mA MAX CONTROL ENBUCK X7R ENLDO1 LVFB1 ENLDO2 40.2k 3.3k VOUT ITH LVOUT2 1.2V 1000pF 2.2µF 80.6k 300mA MAX X7R LVFB2 GND 40.2k 3446 TA02 L1: TOKO A960AW-1R8M
relaTeD parTs PART NUMBER DESCRIPTION COMMENTS
LT3023 Dual, 2x100mA, VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 40µA, ISD < 1µA, Low Noise Micropower LDO VOUT = ADJ, DFN, MS Packages, Low Noise < 20µVRMS(P-P), Stable with 1µF Ceramic Capacitors LT3024 Dual, 100mA/500mA, VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 60µA, ISD < 1µA, Low Noise Micropower LDO VOUT = ADJ, DFN, TSSOP Packages, Low Noise < 20µVRMS(P-P), Stable with 1µF Ceramic Capacitors LTC3025 300mA, Micropower VLDO VIN: 0.9V to 5.5V, VOUT(MIN) = 0.4V, 2.7V to 5.5V Bias Voltage Required, Linear Regulator VDO = 45mV, IQ = 50µA, ISD < 1µA, VOUT = ADJ, DFN Packages, Stable with 1µF Ceramic Capacitors LTC3407 Dual Synchronous 600mA 1.5MHz Constant Frequency Current Mode Operation, VIN from 2.5V to Synchronous Step-Down DC/DC Regulator 5.5V, VOUT Down to 0.6V, DFN, MS Packages LTC3407-2 Dual Synchronous 800mA Synchronous 2.25MHz Constant Frequency Current Mode Operation, VIN from 2.5V to Step-Down DC/DC Regulator, 2.25MHz 5.5V, VOUT Down to 0.6V, DFN, MS Packages LTC3445 I2C Controllable Buck Regulator 600mA, 1.5MHz Current Mode Buck Regulator, I2C Programmable VOUT with Two LDOs and and from 0.85V to 1.55V, two 50mA LDOs, Backup Battery Input with Backup Battery Input PowerPath™ Control, QFN Package LTC3555 High Efficiency USB Power Manager Plus Maximizes Available Power from USB Port, Bat-Track™, “Instant On” Operation, Triple Step-Down DC/DC 1.5A Maximum Charge Current, 180mΩ Ideal Diode with <50Ω Option, 3.3V/25mA Always-On LDO, Three Synchronous Buck Regulators (400mA/400mA/1A), 4mm × 5mm QFN28 Package LTC3557 USB Power Manager with Li-Ion/Polymer Complete Multifunction ASSP: Linear Power Manager and Three Buck Regulators, Charger and Triple Synchrounous Charge Current Programmable Up to 1.5A from Wall Adapter Input, Buck Converter Thermal Regulation, Synchronous Buck Efficiency: >95%, ADJ Outputs: 0.8V to 3.6V at 400mA/400mA/600mA, Bat-Track Adaptive Output Control, 200mΩ Ideal Diode, 4mm × 4mm QFN28 Package LTC3559 Linear USB Li-Ion Battery Charger with Charge Current Programmable Up to 950mA, USB Compatible, Dual Synchronous Dual Buck Regulators 400mA Buck Regulators, Efficiency >90%, 3mm × 3mm QFN16 Package LTC3672B-1/ Fixed-Output Monolithic 400mA Buck >90% Efficiency, VIN: 2.9V to 5.5V, IQ = 260µA, LTC3672B-2 Regulator with Dual 150mA LDOs in LTC3672B-1: Buck = 1.8V, LDO1 = 1.2V, LDO2 = 2.8V a 2mm × 2mm DFN LTC3672B-2: Buck = 1.2V, LDO1 = 2.8V, LDO2 = 1.8V Consult LTC Factory for Other Voltage Combinations LTC3700 Step-Down DC/DC Controller with VIN from 2.65V to 9.8V, Constant Frequency 550kHz Operation LDO Regulator 3446ff 20 Linear Technology Corporation LT 0511 REV F • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2006 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts