LTC3557-1 Linear Technology, LTC3557-1 Datasheet - Page 28

• Manufacturer Part Number: LTC3557-1
• Description: USB Power Manager
• Manufacturer: Linear Technology

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RELATED PARTS
PACKAGE DESCRIPTION
LTC3557/LTC3557-1
4.50 ± 0.05
PART NUMBER
Power Management
LTC3455
LTC3456
LTC3555
LTC3559
Battery Chargers
LTC4055
LTC4066
LTC4085
LTC4088
LTC4089/LTC4089-5 USB Power Manager with Ideal Diode Controller and
28
3.10 ± 0.05
2.64 ± 0.05
(4 SIDES)
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
DESCRIPTION
Dual DC/DC Converter with USB Power Management and
Li-Ion Battery Charger
2-Cell Multi-Output DC/DC Converter with USB Power
Manager
Switching USB Power Manager with Li-Ion/Polymer
Charger, Triple Synchronous Buck Converter + LDO
Linear USB Li-Ion/Polymer Battery Charger with Dual
Synchronous Buck Converter
USB Power Controller and Battery Charger
USB Power Controller and Li-Ion Battery Charger with
Low Loss Ideal Diode
USB Power Manager with Ideal Diode Controller and
Li-Ion Charger
High Effi ciency USB Power Manager and Battery Charger Maximizes Available Power from USB Port, Bat-Track, “Instant On”
High Effi ciency Li-Ion Battery Charger
●
FAX: [phone]
0.40 BSC
0.20 ±0.05
0.70 ±0.05
●
PACKAGE
OUTLINE
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
www.linear.com
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT
ON THE TOP AND BOTTOM OF PACKAGE
(Reference LTC DWG # 05-08-1721 Rev A)
28-Lead Plastic QFN (4mm × 4mm)
PIN 1
TOP MARK
(NOTE 6)
4.00 ± 0.10
(4 SIDES)
UF Package
COMMENTS
Effi ciency >96%, Accurate USB Current Limiting (500mA/100mA),
4mm × 4mm 24-Pin QFN Package
Seamless Transition Between 2-Cell Battery, USB and AC Wall Adapter
Input Power Sources, QFN Package
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, 200mΩ Ideal Diode, 4mm × 5mm
28-Pin QFN Package
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
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 200mΩ Ideal Diode, 4mm × 4mm 16-Pin QFN Package
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 50mΩ Ideal Diode, 4mm × 4mm 24-Pin QFN Package
Charges Single Cell Li-Ion Batteries Directly from a USB Port, Thermal
Regulation, 200mΩ Ideal Diode with <50mΩ Option, 4mm × 3mm
14-Pin DFN Package
Operation, 1.5A Max Charge Current, 180mΩ Ideal Diode with <50mΩ
Option, 3.3V/25mA Always On LDO, 4mm × 3mm 14-Pin DFN Package
1.2A Charger, 6V to 36V (40V
Option, 6mm × 3mm 22-Pin DFN Package
0.200 REF
0.00 – 0.05
0.75 ± 0.05
2.64 ± 0.10
(4-SIDES)
R = 0.05
TYP
MAX
BOTTOM VIEW—EXPOSED PAD
R = 0.115
), 200mΩ Ideal Diode with 50mΩ
© LINEAR TECHNOLOGY CORPORATION 2007
TYP
27
28
LT 0607 • PRINTED IN USA
0.40 BSC
0.20 ± 0.05
1
2
(UF28) QFN 0106 REVA
0.40 ± 0.05
PIN 1 NOTCH
R = 0.20 TYP
OR 0.35 × 45°
CHAMFER
35571f