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LTC3550EDHC-1#PBF

Description
IC CHARGER BATT DUAL 16-DFN
CategoryPower/power management    The power supply circuit   
File Size333KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3550EDHC-1#PBF Overview

IC CHARGER BATT DUAL 16-DFN

LTC3550EDHC-1#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeDFN
package instructionHVSON,
Contacts16
Manufacturer packaging codeDHC
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesBATTERY CHARGE CONTROLLER
control modeCURRENT-MODE
Maximum input voltage5.5 V
Minimum input voltage2.5 V
Nominal input voltage3.6 V
JESD-30 codeR-PDSO-N16
JESD-609 codee3
length5 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1.3 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency1800 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
FEATURES
LTC3550-1
Dual Input USB/AC Adapter
Li-Ion Battery Charger with
600mA Buck Converter
DESCRIPTIO
The LTC
®
3550-1 is a standalone linear charger with a
600mA monolithic synchronous buck converter. It is
capable of charging a single-cell Li-Ion battery from both
wall adapter and USB inputs. The charger automatically
selects the appropriate power source for charging.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge currents
are programmed with external resistors. The LTC3550-1
terminates the charge cycle when the charge current drops
below the programmed termination threshold after the
final float voltage is reached. With power applied to both
inputs, the LTC3550-1 can be put into shutdown mode
reducing the DCIN supply current to 20μA, the USBIN
supply current to 10μA, and the battery drain current to
less than 2μA.
The synchronous buck converter generates a fixed output
voltage of 1.875V. The switching frequency is internally
set at 1.5MHz, allowing the use of small surface mount
inductors and capacitors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. patents, includng 6522118, 6700364, 6580258, 5481178, 6304066,
6127815, 6498466, 6611131
Charges Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable Up to 950mA from
Wall Adapter Input
High Efficiency 600mA Synchronous DC/DC
Converter
No External MOSFET, Sense Resistor or Blocking
Diode Needed
Thermal Regulation Maximizes Charge Rate Without
Risk of Overheating*
Preset Charge Voltage with ±0.6% Accuracy
Programmable Charge Current Termination
1.5MHz Constant Frequency Operation (Step-Down
Converter)
18μA USB Suspend Current in Shutdown
Independent “Power Present” Status Outputs
Charge Status Output
Automatic Recharge
Available in a Thermally Enhanced, Low Profile
(0.75mm) 16-Lead (5mm x 3mm) DFN Package
APPLICATIO S
Cellular Telephones
TYPICAL APPLICATIO
Complete Charge Cycle (1100mA Battery)
1000
800
600
400
200
0
4.2
4.0
3.8
3.6
3.4
5.0
2.5
0
–2.5
0
0.5
1.0
2.0
1.5
TIME (HR)
2.5
3.0
35501f
3550-1 TA02
Dual Input Battery Charger and DC/DC Converter
LTC3550-1
SW
RUN
DCIN
USBIN
1µF
2k
1%
1µF
1.24k
1%
IUSB
IDC
V
OUT
V
CC
BAT
ITERM
GND
800mA (WALL)
500mA (USB)
4.7µF
2k
1%
2.2µH
C
OUT
10µF
CER
V
OUT
1.875V
600mA
WALL
ADAPTER
USB
PORT
BATTERY
CHARGE
VOLTAGE (V) CURRENT (mA)
+
4.2V
SINGLE-CELL
Li-Ion BATTERY
3550-1 TA01
DCIN
VOLTAGE (V)
U
U
U
CONSTANT VOLTAGE
USBIN = 5V
T
A
= 25°C
R
IDC
= 1.25k
R
IUSB
= 2k
1

LTC3550EDHC-1#PBF Related Products

LTC3550EDHC-1#PBF LTC3550EDHC-1#TRPBF
Description IC CHARGER BATT DUAL 16-DFN IC CHARGER BATT DUAL 16-DFN
Brand Name Linear Technology Linear Technology
Is it Rohs certified? conform to conform to
Maker Linear ( ADI ) Linear ( ADI )
Parts packaging code DFN DFN
package instruction HVSON, HVSON,
Contacts 16 16
Manufacturer packaging code DHC DHC
Reach Compliance Code compliant compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types BATTERY CHARGE CONTROLLER BATTERY CHARGE CONTROLLER
control mode CURRENT-MODE CURRENT-MODE
Maximum input voltage 5.5 V 5.5 V
Minimum input voltage 2.5 V 2.5 V
Nominal input voltage 3.6 V 3.6 V
JESD-30 code R-PDSO-N16 R-PDSO-N16
JESD-609 code e3 e3
length 5 mm 5 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 16 16
Maximum operating temperature 70 °C 70 °C
Maximum output current 1.3 A 1.3 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVSON HVSON
Package shape RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 260
Certification status Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm
surface mount YES YES
Switch configuration BUCK BUCK
Maximum switching frequency 1800 kHz 1800 kHz
technology CMOS CMOS
Temperature level INDUSTRIAL INDUSTRIAL
Terminal surface Matte Tin (Sn) Matte Tin (Sn)
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 30 30
width 3 mm 3 mm
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