OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC3550EDHC-1#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LTC3550-1
1
35501f
TIME (HR)
0
CHARGE
CURRENT (mA)
BATTERY
VOLTAGE (V)
DCIN
VOLTAGE (V)
4.2
200
0
400
800
600
1000
1.5 2.5
3550-1 TA02
3.6
3.4
5.0
4.0
3.8
2.5
0
–2.5
0.5 1.0 2.0 3.0
CONSTANT VOLTAGE
USBIN = 5V
T
A
= 25°C
R
IDC
= 1.25k
R
IUSB
= 2k
Dual Input USB/AC Adapter
Li-Ion Battery Charger with
600mA Buck Converter
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 fl oat voltage is fi xed 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
fi nal fl oat 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 fi xed output
voltage of 1.875V. The switching frequency is internally
set at 1.5MHz, allowing the use of small surface mount
inductors and capacitors.
■
Cellular Telephones
■
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 Effi ciency 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 Profi le
(0.75mm) 16-Lead (5mm x 3mm) DFN Package
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, 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
Complete Charge Cycle (1100mA Battery)
Dual Input Battery Charger and DC/DC Converter
1.24k
1%
2k
1%
WALL
ADAPTER
USB
PORT
1µF
1µF
3550-1 TA01
4.7µF
LTC3550-1
RUN
DCIN
USBIN
IUSB
IDC
SW
V
OUT
V
CC
BAT
GND
C
OUT
10µF
CER
ITERM
+
2.2µH
4.2V
SINGLE-CELL
Li-Ion BATTERY
V
OUT
1.875V
600mA
2k
1%
800mA (WALL)
500mA (USB)
LTC3550-1
2
35501f
DCIN, USBIN .............................................. –0.3V to 10V
ENABLE,
⎯
C
⎯
H
⎯
R
⎯
G,
⎯
P
⎯
W
⎯
R, USBPWR ............... –0.3V to 10V
BAT, IDC, IUSB, ITERM ................................ –0.3V to 7V
V
CC
............................................................... –0.3V to 6V
RUN, V
OUT
..................................................–0.3V to V
CC
SW (DC) ........................................–0.3V to (V
CC
+ 0.3V)
DCIN Pin Current (Note 2) ..........................................1A
USBIN Pin Current (Note 2) .................................700mA
BAT Pin Current (Note 2) ............................................1A
P-Channel SW Source Current (DC) .....................800mA
N-Channel SW Source Current (DC) ....................800mA
Peak SW Sink and Source Current ...........................1.3A
Operating Temperature Range (Note 3) ... –40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................... –65°C to 125°C
(Note 1)
The
● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DCIN
= 5V, V
USBIN
= 5V, V
CC
= 3.6V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DCIN
Wall Adapter Input Supply Voltage
●
4.3 8 V
V
USBIN
USB Port Input Supply Voltage
●
4.3 8 V
V
CC
Buck Regulator Input Supply Voltage
●
2.5 5.5 V
V
ENABLE
ENABLE Input Threshold Voltage
0.4 0.7 1.0 V
R
ENABLE
ENABLE Pulldown Resistance
1.2 2 5 MΩ
V
RUN
RUN Threshold Voltage
●
0.3 1 1.5 V
I
RUN
RUN Leakage Current
●
±0.01 ±1 µA
V
⎯
C
⎯
H
⎯
R
⎯
G
⎯
C
⎯
H
⎯
R
⎯
G Output Low Voltage I
⎯
C
⎯
H
⎯
R
⎯
G
= 5mA 0.35 0.6 V
V
⎯
P
⎯
W
⎯
R
⎯
P
⎯
W
⎯
R Output Low Voltage I
⎯
P
⎯
W
⎯
R
= 5mA 0.35 0.6 V
V
USBPWR
USBPWR Output Low Voltage I
USBPWR
= 200µA 0.35 0.6 V
V
UVDC
DCIN Undervoltage Lockout Voltage From Low to High
Hysteresis
4.0 4.15
200
4.3 V
mV
V
UVUSB
USBIN Undervoltage Lockout Voltage From Low to High
Hysteresis
3.8 3.95
200
4.1 V
mV
ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
DCIN
BAT
IDC
USBPWR
ENABLE
RUN
SW
GND
USBIN
IUSB
ITERM
PWR
CHRG
V
OUT
V
CC
GND
TOP VIEW
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 40°C (Note 4)
EXPOSED PAD IS GROUND (PIN 17)
MUST BE SOLDERED TO PCB
ORDER PART NUMBER PART MARKING
LTC3550EDHC-1 35501
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
LTC3550-1
3
35501f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
ASD-DC
V
DCIN
– V
BAT
Lockout Threshold Voltage V
DCIN
from Low to High, V
BAT
= 4.2V
V
DCIN
from High to Low, V
BAT
= 4.2V
140
20
180
50
220
80
mV
mV
V
ASD-USB
V
USBIN
– V
BAT
Lockout Threshold
Voltage
V
USBIN
from Low to High, V
BAT
= 4.2V
V
USBIN
from High to Low, V
BAT
= 4.2V
140
20
180
50
220
80
mV
mV
Battery Charger
I
DCIN
DCIN Supply Current
Charge Mode (Note 5)
Standby Mode
Shutdown Mode
R
IDC
= 10k
Charge Terminated
ENABLE = 5V
●
●
250
50
20
800
100
40
µA
µA
µA
I
USBIN
USBIN Supply Current
Charge Mode (Note 6)
Standby Mode
Shutdown Mode
Shutdown Mode
R
IUSB
= 10k, V
DCIN
= 0V
Charge Terminated
V
DCIN
= 0V, ENABLE = 0V
V
DCIN
> V
USBIN
●
●
250
50
18
10
800
100
36
20
µA
µA
µA
µA
V
FLOAT
Regulated Output (Float) Voltage I
BAT
= 1mA
I
BAT
= 1mA, 0°C < T
A
< 85°C
4.175
4.158
4.2
4.2
4.225
4.242
V
V
I
BAT
BAT Pin Current
Constant-Current Mode
Constant-Current Mode
Constant-Current Mode
Standby Mode
Shutdown Mode
Sleep Mode
R
IDC
= 1.25k
R
IUSB
= 2.1k
R
IDC
= 10k or R
IUSB
= 10k
Charge Terminated
Charger Disabled
DCIN
= 0V, USBIN
= 0V
●
●
●
760
450
93
800
476
100
–3
–1
±1
840
500
107
–6
–2
±2
mA
mA
mA
µA
µA
µA
V
IDC
IDC Pin Regulated Voltage Constant-Current Mode 0.95 1.0 1.05 V
V
IUSB
IUSB Pin Regulated Voltage Constant-Current Mode 0.95 1.0 1.05 V
I
TERMINATE
Charge Current Termination Threshold R
ITERM
= 1k
R
ITERM
= 2k
R
ITERM
= 10k
R
ITERM
= 20k
●
●
●
●
90
45
8.5
4
100
50
10
5
110
55
11.5
6
mA
mA
mA
mA
ΔV
RECHRG
Recharge Battery Threshold Voltage V
FLOAT
– V
RECHRG
, 0°C < T
A
< 85°C 65 100 135 mV
t
RECHRG
Recharge Comparator Filter Time V
BAT
from High to Low 3 6 9 ms
t
TERMINATE
Termination Comparator Filter Time I
BAT
Drops Below Termination Threshold 0.8 1.5 2.2 ms
t
SS
Soft-Start Time I
BAT
= 10% to 90% Full-Scale 175 250 325 µs
R
ON-DC
Power FET On-Resistance (Between
DCIN and BAT)
400 mΩ
R
ON-USB
Power FET On-Resistance (Between
USBIN and BAT)
550 mΩ
T
LIM
Junction Temperature in Constant-
Temperature Mode
105 °C
Switching Regulator
V
OUT
Regulated Output Voltage I
OUT
= 100mA
●
1.819 1.875 1.931 V
ΔV
OUT
Output Voltage Line Regulation
●
0.04 0.4 %/V
I
PK
Peak Inductor Current V
CC
= 3V, V
OUT
= 1.7V 0.75 1 1.25 A
V
LOADREG
Output Voltage Load Regulation 0.5 %
I
S
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
(Note 7)
V
OUT
= 1.7V, I
LOAD
= 0A
V
OUT
= 1.94V, I
LOAD
= 0A
V
RUN
= 0V, V
CC
= 5.5V
300
20
0.1
400
35
1
µA
µA
µA
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DCIN
= 5V, V
USBIN
= 5V, V
CC
= 3.6V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC3550EDHC-1#PBF

Mfr. #:
Buy LTC3550EDHC-1#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Dual Input USB/AC Adapter Li-Ion Battery Charger w/ 600mA Buck Converter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet