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LTC4055EUF-1#PBF

Description
Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.1V 16-Pin QFN EP Tube
CategoryBattery management   
File Size296KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC4055EUF-1#PBF Overview

Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.1V 16-Pin QFN EP Tube

LTC4055EUF-1#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
TypeSwitching Battery Charger Controller
Battery TypeLi-Ion|Li-Pol
Maximum Supply Current (mA)1.6
Minimum Operating Supply Voltage (V)4.35
Maximum Operating Supply Voltage (V)5.5
Output Voltage (V)4.1
Output Current (mA)1250(Max)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count16
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length4
Package Width4
PCB changed16
Lead ShapeNo Lead
LTC4055/LTC4055-1
USB Power Controller
and Li-Ion Charger
FEATURES
n
n
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DESCRIPTION
The LTC
®
4055/LTC4055-1 are USB power manager and
Li-Ion battery chargers designed to work in portable
battery-powered applications. The parts manage and limit
the total current used by the USB peripheral for operation
and battery charging. Depending on the state of the current
select pin (HPWR), total input current can be limited to
either 100mA or 500mA. The voltage drop from the USB
supply or battery to the USB peripheral is typically less than
100mV at 400mA and 20mV at 80mA. Other management
features include: automatic switchover to battery when
input is removed, inrush current limiting, reverse current
blocking, undervoltage lockout and thermal shutdown.
The LTC4055/LTC4055-1 include a complete constant-
current/constant-voltage linear charger for single-cell
Li-ion batteries. The float voltage applied to the battery
is held to a tight 0.8% tolerance, and charge current is
programmable using an external resistor to ground. Fully
discharged cells are automatically trickle charged at 10%
of the programmed current until the cell voltage exceeds
2.8V. Total charge time is programmable by an external
capacitor to ground. When the battery drops 100mV below
the float voltage, automatic recharging of the battery
occurs. Also featured is an NTC thermistor input used to
monitor battery temperature while charging.
The LTC4055/LTC4055-1 are available in a 16-pin low
profile (4mm
×
4mm) QFN package.
n
n
n
n
n
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Charges Single-Cell Li-Ion Batteries Directly from
USB Port
Load Dependent Charging Guarantees USB Input
Current Compliance
Automatic Battery Switchover When Input Supply is
Removed
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating*
Selectable 500mA/100mA Current Limit
Low Loss Full PowerPath
Control with Ideal Diode
Operation (Reverse Current Blocking)
Preset 4.2V Charge Voltage with 0.8% Accuracy
(4.1V for LTC4055-1)
4.1V Float Voltage (LTC4055-1) Improves Battery Life
and High Temperature Safety Margin
USB-Compliant Suspend Mode
Programmable Charge Current and Termination Timer
Soft-Start Limits Inrush Current
NTC Thermistor Input for Temperature Qualified
Charging
Tiny (4mm
×
4mm
×
0.75mm) QFN Package
APPLICATIONS
n
Portable USB Devices: Cameras, MP3 Players, PDAs
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. *Protected by U.S. Patent, including 6522118.
TYPICAL APPLICATION
5V (NOM)
FROM USB
CABLE V
BUS
IN1
10μF
IN2
V
NTC
NTC
WALL
SHDN
SUSPEND USB POWER
500mA/100mA SELECT
SUSP
HPWR
TIMER PROG
0.1μF
CLPROG
97.6k
4055 TA01
Input and Battery Current vs Load Current
R
PROG
= R
CLPROG
= 97.6k
600
OUT
BAT
TO SYSTEM
LOADS
500
400
CURRENT (mA)
I
LOAD
300
200
100
GND
0
–100
I
IN
+
10μF
Li-Ion
CELL
LTC4055
CHRG
ACPR
I
BAT
CHARGING
97.6k
I
BAT
(IDEAL DIODE)
0
100
200
300
400
I
LOAD
(mA)
500
600
4055 TA02
4055fb
1

LTC4055EUF-1#PBF Related Products

LTC4055EUF-1#PBF LTC4055EUF#PBF LTC4055EUF#TR LTC4055EUF#TRPBF LTC4055EUF-1#TRPBF LTC4055EUF
Description Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.1V 16-Pin QFN EP Tube Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.2V 16-Pin QFN EP Tube Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.2V 16-Pin QFN EP T/R Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.2V 16-Pin QFN EP T/R Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.1V 16-Pin QFN EP T/R Switching Battery Charger Controller Li-Ion/Li-Pol 1250mA 4.2V 16-Pin QFN EP
EU restricts the use of certain hazardous substances Compliant Compliant Not Compliant Compliant Compliant Not Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Unconfirmed Active Active Unconfirmed
Type Switching Battery Charger Controller Switching Battery Charger Controller Switching Battery Charger Controller Switching Battery Charger Controller Switching Battery Charger Controller Switching Battery Charger Controller
Battery Type Li-Ion|Li-Pol Li-Ion|Li-Pol Li-Ion|Li-Pol Li-Ion|Li-Pol Li-Ion|Li-Pol Li-Ion|Li-Pol
Maximum Supply Current (mA) 1.6 1.6 1.6 1.6 1.6 1.6
Minimum Operating Supply Voltage (V) 4.35 4.35 4.35 4.35 4.35 4.35
Maximum Operating Supply Voltage (V) 5.5 5.5 5.5 5.5 5.5 5.5
Output Voltage (V) 4.1 4.2 4.2 4.2 4.1 4.2
Output Current (mA) 1250(Max) 1250(Max) 1250(Max) 1250(Max) 1250(Max) 1250(Max)
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended Extended Extended
Pin Count 16 16 16 16 16 16
Standard Package Name QFN QFN QFN QFN QFN QFN
Supplier Package QFN EP QFN EP QFN EP QFN EP QFN EP QFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 4 4 4 4 4 4
Package Width 4 4 4 4 4 4
PCB changed 16 16 16 16 16 16
Lead Shape No Lead No Lead No Lead No Lead No Lead No Lead
HTS - 8542.39.00.01 - 8542.39.00.01 8542.39.00.01 8542.39.00.01
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