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LTC4095EDC#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4095
1
4095fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Standalone USB
Li-Ion/Polymer Battery
Charger in 2mm × 2mm DFN
The LTC
®
4095 is a complete constant-current/constant-
voltage linear charger for single-cell lithium-ion/polymer
batteries. Its small 2mm × 2mm DFN package and low
external component count make the LTC4095 especially
well-suited for portable USB power applications.
Up to 950mA of charge current may be programmed via a
single resistor from the PROG pin to ground. The HPWR
pin allows the charge current to be set at 20% or 100% of
its full-scale programmed value. An internal safety timer
terminates charge current. The fi nal fl oat voltage is preset
to 4.2V and held to a tight 0.5% tolerance. Also featured
is an NTC thermistor input to monitor battery temperature
while charging, a C/10 current detection output, automatic
recharge, bad-battery detection and low-battery trickle
charge. A thermal feedback loop regulates the charge
current to limit the die temperature during high power
operation or high ambient thermal conditions.
The LTC4095 is available in a tiny, low profi le (0.75mm)
8-lead 2mm × 2mm DFN package.
■
Full-Featured Standalone USB Li-Ion/Polymer
Battery Charger
■
100mA to 950mA Programmable Charge Current
■
C/10 Charge Current Detection Output
■
Internal Safety Timer Termination
■
NTC Thermistor Input for Temperature Qualifi ed
Charging
■
Preset 4.2V Float Voltage with 0.5% Accuracy
■
Constant-Current/Constant-Voltage Operation with
Thermal Feedback
■
Charge Current Monitor Output for Gas Gauging
■
Automatic Recharge
■
Bad-Battery Detection
■
8.5µA Input Supply Current in Suspend Mode
■
Tiny 8-Lead (2mm × 2mm) DFN Package
■
PDAs
■
Media Players
■
Cellular Phones
■
Other Portable Electronics
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118, 6570372, 6700364.
+
IN
4095 TA01a
Li-Ion
BATTERY
R
PROG
1.74k
IN
4.3V TO 5.5V
UP TO 7V
TRANSIENTS
C
IN
1µF
LTC4095
CHRGHPWR
BAT
NTC
PROG
SUSP
GND
500mA Single-Cell Li-Ion Charger
LTC4095
2
4095fa
PACKAGE/ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (IN)
t < 1ms and Duty Cycle < 1% .................. –0.3V to 7V
Steady State ............................................. –0.3V to 6V
BAT, SUSP,
⎯
C
⎯
H
⎯
R
⎯
G Voltage ............................ –0.3V to 6V
PROG, NTC, HPWR
Voltage ............................ –0.3V to Max (IN, BAT) + 0.3V
I
BAT
.............................................................................1A
I
PROG
...................................................................1.25mA
I
⎯
C
⎯
H
⎯
R
⎯
G
......................................................................50mA
Junction Temperature ........................................... 125°C
Operating Temperature Range ................. –40°C to 85°C
Storage Temperature Range ................... –65°C to 125°C
(Notes 1, 2, 3)
TOP VIEW
BAT
GND
CHRG
SUSP
IN
PROG
NTC
HPWR
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
9
4
1
2
3
6
5
7
8
T
JMAX
= 125°C, θ
JA
= 60°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DC PART MARKING
LTC4095EDC LCLG
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.
The
● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. IN = HPWR = 5V, BAT = 3.8V, NTC = SUSP = 0V, R
PROG
= 1.74k unless
otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Battery Charger
IN Input Supply Voltage
●
4.3 5.5 V
I
IN
Battery Charger Quiescent Current
(Note 4)
Standby Mode; Charger Terminated
Suspend Mode; SUSP = 5V
200
8.5
400
17
µA
µA
V
FLOAT
BAT Regulated Output Voltage
0°C ≤ T
A
≤ 85°C
4.179
4.165
4.200
4.200
4.221
4.235
V
V
I
CHG
Constant-Current Mode Charge Current HPWR = 5V
HPWR = 0V
●
440
84
460
92
500
100
mA
mA
I
BAT
Battery Drain Current Standby Mode; Charger Terminated
Shutdown Mode; IN < V
UVLO
, BAT = 4.2V
Suspend Mode; SUSP = 5V, BAT = 4.2V
–3.5
–2.0
–1.3
–7
–4
–3
µA
µA
µA
V
UVLO
Undervoltage Lockout Threshold BAT = 3.5V, IN Rising 3.875 4.0 4.125 V
ΔV
UVLO
Undervoltage Lockout Hystersis BAT = 3.5V 200 mV
V
DUVLO
Differential Undervoltage Lockout
Threshold
BAT = 4.05V, (IN – BAT), IN Falling 25 40 60 mV
ΔV
DUVLO
Differential Undervoltage Lockout
Hysteresis
BAT = 4.05V 125 mV
PROG PROG Pin Servo Voltage HPWR = 5V
HPWR = 0V
BAT < V
TRKL
1.000
0.200
0.100
V
V
V
h
PROG
Ratio of I
BAT
to PROG Pin Current 800 mA/mA
I
TRKL
Trickle Charge Current BAT < V
TRKL
37 46 55 mA
V
TRKL
Trickle Charge Threshold Voltage BAT Rising 2.8 2.9 3.0 V
ΔV
TRKL
Trickle Charge Hysteresis Voltage 100 mV
ΔV
RECHRG
Recharge Battery Threshold Voltage Threshold Voltage Relative to V
FLOAT
–75 –95 –115 mV
LTC4095
3
4095fa
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4095 is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may impair device reliability.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. IN = HPWR = 5V, BAT = 3.8V, NTC = SUSP = 0V, R
PROG
= 1.74k unless
otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
RECHRG
Recharge Comparator Filter Time BAT Falling 1.7 ms
t
TERM
Safety Timer Termination Period BAT = V
FLOAT
3.5 4 4.5 Hour
t
BADBAT
Bad-Battery Termination Time BAT < V
TRKL
0.4375 0.5 0.5625 Hour
h
C/10
End of Charge Indication Current Level (Note 5) 0.09 0.1 0.11 mA/mA
t
C/10
End of Charge Comparator Filter Time I
BAT
Falling 2.2 ms
R
ON_CHG
Battery Charger Power FET On-
Resistance (Between IN and BAT)
I
BAT
= 200mA 500 mΩ
T
LIM
Junction Temperature in Constant
Temperature
115 °C
NTC
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising NTC Voltage
Hysteresis
0.750 • IN 0.765 • IN
0.016 • IN
0.780 • IN V
V
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling NTC Voltage
Hysteresis
0.334 • IN 0.349 • IN
0.016 • IN
0.364 • IN V
V
V
DIS
NTC Disable Threshold Voltage Falling NTC Voltage
Hysteresis
●
0.007 • IN 0.017 • IN
0.010 • IN
0.027 • IN mV
mV
I
NTC
NTC Leakage Current NTC = IN = 5V –1 0 1 µA
Logic (HPWR, SUSP,
⎯
C
⎯
H
⎯
R
⎯
G)
V
IL
Input Low Voltage HPWR, SUSP Pins 0.4 V
V
IH
Input High Voltage HPWR, SUSP Pins 1.2 V
R
DN
Logic Pin Pull-Down Resistance HPWR, SUSP Pins
●
1.9 3.6 6.3 MΩ
⎯
C
⎯
H
⎯
R
⎯
G
⎯
C
⎯
H
⎯
R
⎯
G Pin Output Low Voltage I
⎯
C
⎯
H
⎯
R
⎯
G
= 5mA 100 250 mV
I
⎯
C
⎯
H
⎯
R
⎯
G
⎯
C
⎯
H
⎯
R
⎯
G Pin Input Current BAT = 4.5V,
⎯
C
⎯
H
⎯
R
⎯
G = 5V 0 1 µA
Note 4: IN supply current does not include current through the PROG pin
or any current delivered to the battery through the BAT pin. Total input
current is equal to this specifi cation plus 1.00125 • I
BAT
where I
BAT
is the
charge current.
Note 5: h
C/10
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4095EDC#TRMPBF

Mfr. #:
Buy LTC4095EDC#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Standalone 950mA USB Li-Ion/Polymer Battery Charger in DFN
Lifecycle:
New from this manufacturer.
Delivery:
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