900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC4001 Datasheet

2A Synchronous Buck Li-Ion Charger

No Preview Available !

LTC4001
2A Synchronous
Buck Li-Ion Charger
FEATURES
Low Power Dissipation
2A Maximum Charge Current
No External MOSFETs, Sense Resistor or Blocking
Diode Required
Remote Sensing at Battery Terminals
Programmable Charge Termination Timer
Preset 4.2V Float Voltage with ±0.5% Accuracy
www.DaPtraoSghreaemt4mU.caobmle Charge Current Detection/Termination
Automatic Recharge
Thermistor Input for Temperature Qualified Charging
Compatible with Current Limited Wall Adapters
Low Profile 16-Lead (4mm × 4mm) QFN Package
U
APPLICATIO S
Handheld Battery-Powered Devices
Handheld Computers
Charging Docks and Cradles
Digital Cameras
Smart Phones
DESCRIPTIO
The LTC®4001 is a 2A Li-Ion battery charger intended for
5V wall adapters. It utilizes a 1.5MHz synchronous buck
converter topology to reduce power dissipation during
charging. Low power dissipation, an internal MOSFET and
sense resistor allow a physically small charger that can be
embedded in a wide range of handheld applications. The
LTC4001 includes complete charge termination circuitry,
automatic recharge and a ±1% 4.2V float voltage. Input
short-circuit protection is included so no blocking diode is
required.
Battery charge current, charge timeout and end-of-charge
indication parameters are set with external components.
Additional features include shorted cell detection, tempera-
ture qualified charging and overvoltage protection. The
LTC4001 is available in a low profile (0.75mm) 16-lead
(4mm × 4mm) QFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
2A Single Cell Li-Ion Battery Charger
1.5µH
VIN
4.5V TO 5.5V
10µF
VINSENSE
PVIN
SW
SENSE
BATSENS
BAT
PGND
CHRG
LTC4001
NTC
FAULT
EN
PROG IDET TIMER
SS GNDSENS
274
0.22µF
0.1µF
+
10µF
4.2V
Li-Ion
4001 TA01a
Power Loss vs VBAT
Charging (PWM Mode)
1.25
1.00
0.75
0.50
0.25
VIN = 5V
2A CHARGER
0
3 3.25
3.5
3.75
VBAT (V)
4 4.25
4001 TA01b
4001f
1


Linear Technology Electronic Components Datasheet

LTC4001 Datasheet

2A Synchronous Buck Li-Ion Charger

No Preview Available !

LTC4001
ABSOLUTE AXI U RATI GS
(Note 1)
PVIN, VINSENSE
t < 1ms, DC < 1% .................................... –0.3V to 7V
Steady State ............................................ –0.3V to 6V
SW, SENSE, BAT, BATSENS, SS, FAULT, CHRG, EN,
NTC, PROG, IDET, TIMER Voltage .............. – 0.3V to 6V
Operating Temperature Range (Note 3) .. – 40°C to 85°C
Operating Junction Temperature
(Note 5) ............................................... – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 125°C
www.DataSheet4U.com
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
16 15 14 13
BAT 1
12 PROG
SENSE 2
11 NTC
17
PGND 3
10 FAULT
GNDSENS 4
9 VINSENSE
5678
UF PACKAGE
16-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER UF PART MARKING
LTC4001EUF
4001
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 specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 5V, VEN = 0V, RPROG = 549, RIDET = 549, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VIN Supply Voltage
IIN
(Note 2)
PVIN Connected to VINSENSE, PROG and IDET
Pins Open, Charger On
4 5.5
2
VFLOAT VBAT Regulated Float Voltage
Shutdown, EN = VIN
Measured from BATSENS to GNDSENS
50
4.158 4.2 4.242
4.179 4.2 4.221
IBAT
ITRIKL
VTRIKL
VUVL
VUVL
VASD
fOSC
D
Current Mode Charge Current
Trickle Charge Current
Trickle Charge Threshold
VIN Undervoltage Lockout Voltage
VIN Undervoltage Lockout Hysteresis
Automatic Shutdown Threshold
Voltage
Oscillator Frequency
RPROG = 549, VBAT = 3.5V
RPROG = 1.10k, VBAT = 3.5V
Shutdown, EN = VIN
VBAT = 2V
VBAT Rising
VBAT Falling
VIN Rising, Measured from VINSENSE to GNDSENS
Measured from VINSENSE to GNDSENS
VINSENSE – VBATSENS Rising (Turn-On), VBATSENSE = 4V
VINSENSE – VBATSENS Falling (Turn-Off), VBATSENSE = 4V
Maximum Duty Factor
1.8 2 2.2
0.9 1 1.1
±5
35 50 65
3.05 3.1 3.20
2.85 3.0 3.05
2.7 2.82
100
200 250 300
15 30 60
1.3 1.5 1.7
100
RPFET
RNFET
RDS(ON) of P-Channel MOSFET
RDS(ON) of N-Channel MOSFET
Measured from PVIN to SW
Measured from SW to PGND
127
121
2
UNITS
V
mA
µA
V
V
A
A
µA
mA
V
V
V
mV
mV
mV
MHz
%
m
m
4001f


Part Number LTC4001
Description 2A Synchronous Buck Li-Ion Charger
Maker Linear Technology
Total Page 20 Pages
PDF Download

LTC4001 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 LTC4000 High Voltage High Current Controller
Linear Technology
2 LTC4001 2A Synchronous Buck Li-Ion Charger
Linear Technology
3 LTC4001-1 2A Synchronous Buck Li-Ion Charger
Linear Technology
4 LTC4002 Standalone Li-Ion Switch Mode Battery Charger
Linear Technology
5 LTC4002-4.2 Standalone Li-Ion Switch Mode Battery Charger
Linear Technology
6 LTC4006 Standalone Li-Ion Battery Charger
Linear Technology
7 LTC4007 Standalone Li Battery Charger
Linear Technology
8 LTC4007-1 Li-Ion Battery Charger
Linear Technology
9 LTC4008 Multi-Chemistry Battery Charger
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy