Datasheet

LTC3557/LTC3557-1
28
35571fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0808 REV C • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
Power Management
LTC3455 Dual DC/DC Converter with USB Power Management and
Li-Ion Battery Charger
Effi ciency >96%, Accurate USB Current Limiting (500mA/100mA),
4mm × 4mm 24-Pin QFN Package
LTC3456 2-Cell Multi-Output DC/DC Converter with USB Power
Manager
Seamless Transition Between 2-Cell Battery, USB and AC Wall Adapter
Input Power Sources, QFN Package
LTC3555 Switching USB Power Manager with Li-Ion/Polymer
Charger, Triple Synchronous Buck Converter + LDO
Complete Multifunction PMIC: Switch Mode Power Manager and Three
Buck Regulators + LDO, Charge Current Programmable up to 1.5A from
Wall Adapter Input, Thermal Regulation Synchronous Buck Converters
Effi ciency: >95%, ADJ Outputs: 0.8V to 3.6V at 400mA/400mA/1A
Bat-Track Adaptive Output Control, 200m Ideal Diode, 4mm × 5mm
28-Pin QFN Package
LTC3559 Linear USB Li-Ion/Polymer Battery Charger with Dual
Synchronous Buck Converter
Adjustable Synchronous Buck Converters, Effi ciency: >90%, Outputs:
Down to 0.8V at 400mA for each, Charge Current Programmable up to
950mA, USB Compatible, 3mm × 3mm 16-Pin QFN Package
Battery Chargers
LTC4055 USB Power Controller and Battery Charger Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 200m Ideal Diode, 4mm × 4mm 16-Pin QFN Package
LTC4066 USB Power Controller and Li-Ion Battery Charger with
Low Loss Ideal Diode
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 50m Ideal Diode, 4mm × 4mm 24-Pin QFN Package
LTC4085 USB Power Manager with Ideal Diode Controller and
Li-Ion Charger
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 200m Ideal Diode with <50m Option, 4mm × 3mm
14-Pin DFN Package
LTC4088 High Effi ciency USB Power Manager and Battery Charger Maximizes Available Power from USB Port, Bat-Track, “Instant On”
Operation, 1.5A Max Charge Current, 180m Ideal Diode with <50m
Option, 3.3V/25mA Always On LDO, 4mm × 3mm 14-Pin DFN Package
LTC4089/LTC4089-5 USB Power Manager with Ideal Diode Controller and
High Effi ciency Li-Ion Battery Charger
1.2A Charger, 6V to 36V (40V
MAX
), 200m Ideal Diode with 50m
Option, 6mm × 3mm 22-Pin DFN Package
RELATED PARTS
4.00 p 0.10
(4 SIDES)
S NOT A JEDEC PACKAGE OUTLINE
N
OT TO SCALE
S
IONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
0.40 p 0.05
2827
1
2
BOTTOM VIEW—EXPOSED PAD
2.64 p 0.10
(4-SIDES)
0.75 p 0.05
R = 0.115
TYP
0.20 p 0.05
0.40 BSC
0.200 REF
0.00 – 0.05
(UF28) QFN 0106 REVA
DED SOLDER PAD PITCH AND DIMENSIONS
R MASK TO AREAS THAT ARE NOT SOLDERED
0.70 p0.05
0.20 p0.05
0.40 BSC
PACKAGE
OUTLINE
PIN 1 NOTCH
R = 0.20 TYP
OR 0.35 s 45o
CHAMFER
R = 0.05
TYP
PACKAGE DESCRIPTION
UF Package
28-Lead Plastic QFN (4mm × 4mm)
(Reference LTC DWG # 05-08-1721 Rev A)