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LTC4055EUF#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LTC4055/LTC4055-1
22
4055fb
TYPICAL APPLICATIONS
USB Hosting Application: The LTC4055/LTC4055-1’s
IN1 and IN2 are Set Hi-Z by Pulling the SUSP Pin
Above 1.2V
In applications where the power is required to go back
out on to the USB V
BUS
the LTC4055/LTC4055-1 can be
confi gured to turn off its input power path, IN1 and IN2.
Forcing the SUSP input pin above 1.2V does this. Figure 6
shows the application circuit. The wall adapter or the battery
can still provide power to OUT, which in turn can provide
power to V
BUS
when commanded from the USB controller.
The ability to charge the battery is enabled when the wall
adapter is present.
+
IN1
IN2
WALL
SUSP
V
NTC
NTC
OUT
Li-Ion
CELL
500mA/100mA SELECT
SHUTDOWN
10μF
1μF
TIMER PROG
LTC4055
CLPROG GND
4055 F06
TO LDOs,
REGs, ETC
BAT
CHRG
ACPR
HPWR
SHDN
C
TIMER
0.1μF
R
PROG
100k
5V (NOM)
FROM USB
CABLE V
BUS
5V WALL
ADAPTER INPUT
R
CLPROG
105k
R1
34.8k
R2
10k
USB
CONTROLLER
R3
100k
NTC
100k
DC/DC
CONVERTER
EN
V
IN
V
OUT
Figure 6. USB Hosting Application
LTC4055/LTC4055-1
23
4055fb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
UF Package
16-Lead Plastic QFN (4mm × 4mm)
(Reference LTC DWG # 05-08-1692)
4.00 ± 0.10
(4 SIDES)
NOTE:
1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WGGC)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS 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
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)
0.55 ± 0.20
1615
1
2
BOTTOM VIEW—EXPOSED PAD
2.15 ± 0.10
(4-SIDES)
0.75 ± 0.05
R = 0.115
TYP
0.30 ± 0.05
0.65 BSC
0.200 REF
0.00 – 0.05
(UF16) QFN 1004
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.72 ±0.05
0.30 ±0.05
0.65 BSC
2.15 ± 0.05
(4 SIDES)
2.90 ± 0.05
4.35 ± 0.05
PACKAGE OUTLINE
PIN 1 NOTCH R = 0.20 TYP
OR 0.35 × 45° CHAMFER
LTC4055/LTC4055-1
24
4055fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2004
LT 1108 REV B • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
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LTC4097 USB/Wall Adapter Standalone Li-Ion/Polymer Battery Charger
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LTC4413 Dual Monolithic Ideal Diodes
3mm × 3mm DFN Package, Low Loss Replacement for ORing Diodes
Power Management
LTC4066/
LTC4066-1
USB Power Controller and Battery Charger “Instant On” Operation, 50mΩ Ideal Diode, 4.1V Float Voltage
(LTC4066-1), 4mm × 4mm QFN24 Package
LTC4085/
LTC4085-1
USB Power Manager with Ideal Diode Controller and Li-Ion
Charger
“Instant On” Operation, 200mΩ Ideal Diode with <50mΩ Option,
4.1V Float Voltage (LTC4085-1), 4mm × 3mm DFN14 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, 180mΩ Ideal Diode with <50mΩ
Option, 3.3V/25mA Always-On LDO, 4mm × 3mm DFN14 Package
LTC4088-1/
LTC4088-2
High Effi ciency USB Power Manager and Battery Charger with
Regulated Output Voltage
Maximizes Available Power from USB Port, Bat-Track, “Instant On”
Operation, 1.5A Max Charge Current, 180mΩ Ideal Diode with <50mΩ
Option, Automatic Charge Current Reduction Maintains 3.6V V
OUT
, No
3.3V LDO, 4mm × 3mm DFN14 Package
LTC4089/
LTC4089-5/
LTC4089-1
USB Power Manager with Ideal Diode Controller and High
Voltage High Effi ciency Li-Ion Battery Charger
High Effi ciency 1.2A Charger from 6V to 36V (40V Max) Input, 200mΩ
Ideal Diode with <50mΩ Option, 6mm × 3mm DFN22, Bat-Track Adaptive
Output Control (LTC4089), Fixed 5V Output (LTC4089-5), 4.1V Float
Voltage (LTC4089-1)
LTC4090/
LTC4090-5
USB Power Manager with Ideal Diode Controller and High
Voltage High Effi ciency Li-Ion Battery Charger
High Effi ciency 1.2A Charger from 6V to 38V (60V Max) Input (2A
Available to Load). 200mΩ Ideal Diode with <50mΩ Option, 6mm × 3mm
DFN22, Bat-Track Adaptive Output Control (LTC4089), Fixed 5V Output
(LTC4089-5)
Bat-Track is a trademark of Linear Technology Corporation.
CLPROG
LTC4055
GND PROG TIMER
IN1 OUT BAT IN2
R5 10k
432
5
LTC4411
4
1
2
3
1
NTC
4055 TA03
+Li-Ion
SYSTEM LOAD
OUTPUT
USB CURRENT 100mA-500mA
ADAPTER CURRENT 700mA
9
R2
105k
C2
0.1μF
10 11 12
NTC
VNTC
CHRG
ACPR
WALL
SHDN
SUSP
HPWR
EXPOSED PAD
16
15
14
13
5
6
7
8
17
R9
10k
R10
35.8k
ADAPTER
4.5V TO 5.5V
USB
4.35V TO 5.5V
R3
68.1k
V
IN
GND
CTL
V
OUT
STAT
C5
1μF
C3
10μF
C1
10μF
Adapter Diode Replaced with LTC4411 “Ideal Diode” for Improved Effi ciency
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC4055EUF#PBF

Mfr. #:
Buy LTC4055EUF#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management USB Pwr Cntr & Li-Ion Lin Chr
Lifecycle:
New from this manufacturer.
Delivery:
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