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LTC3558EUD#PBF

Description
Linear Battery Charger Li-Ion/Li-Pol 950mA 4.2V 20-Pin QFN EP Tube
CategoryBattery management   
File Size404KB,32 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3558EUD#PBF Overview

Linear Battery Charger Li-Ion/Li-Pol 950mA 4.2V 20-Pin QFN EP Tube

LTC3558EUD#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
TypeLinear Battery Charger
Battery TypeLi-Ion|Li-Pol
Minimum Operating Supply Voltage (V)4.3
Maximum Operating Supply Voltage (V)5.5
Output Voltage (V)4.2
Output Current (mA)950(Max)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count20
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length3
Package Width3
PCB changed20
Lead ShapeNo Lead
LTC3558
Linear USB Battery Charger
with Buck and
Buck-Boost Regulators
FEATURES
Battery Charger
n
Standalone USB Charger
n
Up to 950mA Charge Current Programmable via
Single Resistor
n
HPWR Input Selects 20% or 100% of Programmed
Charge Current
n
NTC Input for Temperature Qualified Charging
n
Internal Timer Termination
n
Bad Battery Detection
Switching Regulators (Buck and Buck-Boost)
n
Up to 400mA Output Current per Regulator
n
2.25MHz Constant-Frequency Operation
n
Power Saving Burst Mode
®
Operation
n
Low Profile, 20-Lead, 3mm
×
3mm QFN Package
DESCRIPTION
The LTC
®
3558 is a USB battery charger with dual high ef-
ficiency switching regulators. The device is ideally suited
to power single-cell Li-Ion/Polymer based handheld ap-
plications needing multiple supply rails.
Battery charge current is programmed via the PROG pin
and the HPWR pin with capability up to 950mA of current
at the BAT pin. The
CHRG
pin allows battery status to be
monitored continuously during the charging process. An
internal timer controls charger termination.
The part includes monolithic synchronous buck and buck-
boost regulators that can provide up to 400mA of output
current each and operate at efficiencies greater than 90%
over the entire Li-Ion/Polymer battery range. The buck-
boost regulator can regulate its programmed output voltage
at its rated deliverable current over the entire Li-Ion range
without drop out, increasing battery runtime.
The LTC3558 is offered in a low profile (0.75mm), thermally
enhanced, 20-lead (3mm
×
3mm) QFN package.
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
n
n
SD/Flash-Based MP3 Players
Low Power Handheld Applications
TYPICAL APPLICATION
USB Charger Plus Buck Regulator and Buck-Boost Regulator
USB (4.3V TO 5.5V)
1μF
1.74k
PROG
NTC
LTC3558
CHRG
SUSP
DIGITAL
CONTROL
HPWR
MODE
EN1
EN2
FB2
105k
EXPOSED
PAD
15k
330pF
V
C2
3558 TA01
Demo Board
V
CC
BAT
PV
IN1
PV
IN2
10μF
+
SINGLE
Li-lon CELL
(2.7V TO 4.2V)
1.2V AT 400mA
SW1
FB1
SWAB2
4.7μH
324k
649k
10pF
10μF
2.2μH
3.3V AT 400mA
SWCD2
V
OUT2
324k
121k
33pF
22μF
10pF
GND
3558f
1

LTC3558EUD#PBF Related Products

LTC3558EUD#PBF LTC3558EUD#TRPBF
Description Linear Battery Charger Li-Ion/Li-Pol 950mA 4.2V 20-Pin QFN EP Tube Linear Battery Charger Li-Ion/Li-Pol 950mA 4.2V 20-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
Type Linear Battery Charger Linear Battery Charger
Battery Type Li-Ion|Li-Pol Li-Ion|Li-Pol
Minimum Operating Supply Voltage (V) 4.3 4.3
Maximum Operating Supply Voltage (V) 5.5 5.5
Output Voltage (V) 4.2 4.2
Output Current (mA) 950(Max) 950(Max)
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Extended Extended
Pin Count 20 20
Standard Package Name QFN QFN
Supplier Package QFN EP QFN EP
Mounting Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max)
Package Length 3 3
Package Width 3 3
PCB changed 20 20
Lead Shape No Lead No Lead
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