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®
Data Sheet
March 9, 2006
ISL6298
FN9173.4
Li-ion/Li-Polymer Battery Charger
The ISL6298 is an integrated single-cell Li-ion or Li-polymer
battery charger optimized for low current applications. The
targeted applications include mini-disk (MD) players, Blue
Tooth headsets, or other applications that use low-capacity
battery cells.
The ISL6298 is a linear charger that charges the battery in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 450mA during the CC phase. Once the battery voltage
reaches 4.2V (or 4.1V), the charger enters CV mode and the
charge current starts to reduce. When the charger current
drops to a user-programmable threshold, the charger
indicates the end-of-charge with a STATUS pin. The charger
does not actually terminate until a user-programmable total
fast charge time is reached. If the battery voltage drops to a
recharge threshold after termination, the charger will re-
charge the battery to its full capacity. The charger
preconditions the battery with 20% of the programmed CC
current if the battery voltage is below 2.8V. The total
precharge time is limited to 1/8 of the total fast charge time.
The ISL6298 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space-limited for thermal dissipation. Additional features
include an NTC thermistor interface for monitoring the
ambient temperature, the ability to disable the time limit of
the fast charge, an FAULT indication, and a thermally
enhanced QFN or DFN package.
Ordering Information
PART # (NOTE)
TEMP.
PART RANGE
MARKING (°C)
PACKAGE
(Pb-FREE)
PKG.
DWG. #
ISL6298CR4Z
6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4
ISL6298CR4Z-T 6298CR4Z 16 Ld 4x4 QFN Tape and Reel
ISL6298-2CR3Z 982Z
-20 to 70 10 Ld 3x3 DFN L10.3x3
ISL6298-2CR3Z-T 982Z
10 Ld 3x3 DFN Tape and Reel
ISL6298-2CR4Z 6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4
ISL6298-2CR4Z-T 6298CR4Z 16 Ld 4x4 QFN Tape and Reel
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Features
• Complete Charger for Single-Cell Li-ion Batteries
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 450mA
• Programmable End-of-Charge Current
• Preconditioning with 20% Fast Charge Current
• 10% Accuracy at 250mA
• Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• User Programmable Safety Timer
• Ambient Temperature Range: -20°C to 70°C
• Thermally-Enhanced QFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• MD Players, Blue-Tooth Headsets and MP3 Players
• Portable Instruments
• PDAs, Cell Phones and Smart Phones
• Stand-Alone Chargers
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinouts
ISL6298 (16 LD QFN)
TOP VIEW
ISL6298 (10 LD DFN)
TOP VIEW
16 15 14 13
VIN 1
FAULT 2
STATUS 3
TIME 4
12 VBAT
11 TEMP
10 IMIN
9 IREF
5678
VIN
FAULT
STATUS
TIME
GND
1
2
3
4
5
10 VBAT
9 TEMP
8 IREF
7 V2P8
6 EN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004-2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.

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ISL6298
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7V
Output Pin Voltage (VBAT) . . . . . . . . . . . . . . . . . . . . . . -0.3 to 5.5V
Signal Input Voltage (TOEN, TIME, IREF, IMIN) . . . . . . -0.3 to 3.2V
Output Pin Voltage (STATUS, FAULT) . . . . . . . . . . . . . . . . -0.3 to 7V
Charge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . .-20°C to 70°C
Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3V to 6.5V
Charge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA to 450mA
Thermal Information
Thermal Resistance (Notes 1, 2)
θJA (°C/W) θJC (°C/W)
4x4 QFN Package . . . . . . . . . . . . . . . .
41
4
3x3 DFN Package . . . . . . . . . . . . . . . .
46
4
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. θJC, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications
Typical values are tested at VIN = 5V and 25°C Ambient Temperature, maximum and minimum values are
guaranteed over 0°C to 70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless
otherwise noted.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
POWER-ON RESET
Rising VIN Threshold
3.0 3.4 4.0
V
Falling VIN Threshold (Note 3)
2.25 2.4 2.65
V
STANDBY CURRENT
VBAT Pin Sink Current
VIN Pin Supply Current
VIN Pin Supply Current
VOLTAGE REGULATION
ISTANDBY
IVIN
IVIN
VIN floating or EN = LOW
VBAT floating and EN pulled low
VBAT floating and EN floating
- - 3.0 µA
- 30 - µA
- 1 - mA
Output Voltage
Output Voltage
Power MOSFET On Resistance
CHARGE CURRENT
VCH
VCH
For ISL6298 only
For ISL6298-2 only
VBAT = 3.7V, ICHARGE = 0.3A
4.059
4.158
-
4.10
4.20
0.5
4.141
4.242
-
V
V
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Constant Charge Current
Trickle Charge Current
End-of-Charge Threshold
RECHARGE THRESHOLD
ICHARGE RIREF = 80k, VBAT = 3.7V
225 250 275
mA
ITRICKLE RIREF = 80k, VBAT = 2.0V
45 55 64 mA
ICHARGE VIREF > 1.2V, VBAT = 3.7V
- 255 -
mA
ITRICKLE VIREF > 1.2V, VBAT = 2.0V
- 52 - mA
ICHARGE VIREF < 0.4V, VBAT = 3.7V, TA = 25°C
75 100 125 mA
ICHARGE VIREF < 0.4V, VBAT = 3.7V, 0°C ~ 50°C 70 100 130 mA
ITRICKLE VIREF < 0.4V, VBAT = 2.0V
- 23 - mA
IEOC
RIMIN = 80k
14 25 36 mA
Recharge Voltage Threshold
Recharge Voltage Threshold
VRECHRG
VRECHRG
For ISL6298 only
For ISL6298-2 only
- 3.9 -
- 4.0 -
V
V
2 FN9173.4
March 9, 2006

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ISL6298
Electrical Specifications
Typical values are tested at VIN = 5V and 25°C Ambient Temperature, maximum and minimum values are
guaranteed over 0°C to 70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless
otherwise noted. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
TRICKLE CHARGE THRESHOLD
Trickle Charge Threshold Voltage
Trickle Charge Threshold Voltage
TEMPERATURE MONITORING
VMIN
VMIN
For ISL6298 only
For ISL6298-2 only
2.63 2.73 2.93
2.7 2.8 3.0
V
V
Low Battery Temperature Threshold
Low Battery Temperature Hysteresis
VTMIN
V2P8 = 3.0V
V2P8 = 3.0V
1.45 1.51 1.57
- 220 -
V
mV
High Battery Temperature Threshold
High Battery Temperature Hysteresis
VTMAX
V2P8 = 3.0V
V2P8 = 3.0V
0.36 0.38 0.40
- 60 -
V
mV
Battery Removal Threshold
Charge Current Foldback Threshold (Note 4)
Current Foldback Gain (Note 4)
OSCILLATOR
VRMV
TFOLD
GFOLD
V2P8 = 3.0V
- 2.25 -
V
85 100 115 °C
- 25 - mA/°C
Oscillation Period
LOGIC INPUT AND OUTPUT
TOSC
CTIME = 15nF
2.4 3.0 3.6 ms
TOEN Input High
2.0 - - V
TOEN and EN Input Low
- - 0.8 V
IREF and IMIN Input High
1.2 - - V
IREF and IMIN Input Low
- - 0.4 V
STATUS/FAULT Sink Current
Pin Voltage = 0.8V
5 - - mA
NOTES:
3. The POR falling edge voltage is guaranteed to be lower than the Trickle Charge Threshold Voltage (VMIN) by actual tests.
4. Guaranteed by characterization.
3 FN9173.4
March 9, 2006

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ISL6298
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25°C,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted
4.25
4.24
4.23
4.22
4.21
4.20
4.19
4.18
4.17
4.16
4.15
0
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
CHARGE CURRENT (A)
FIGURE 1. CHARGER OUTPUT VOLTAGE vs CHARGE
CURRENT
4.216
4.214
4.212
LOAD CURRENT = 10mA
4.210
4.208
4.206
4.204
4.202
4.200
0
20 40 60 80 100
TEMPERATURE (OC)
FIGURE 2. CHARGER OUTPUT VOLTAGE vs TEMPERATURE
4.30
4.28
4.26
4.24
4.22
4.20
CHARGE CURRENT = 10mA
4.18
4.16
4.14
4.12
4.10
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5
INPUT VOLTAGE (V)
FIGURE 3. CHARGER OUTPUT VOLTAGE vs INPUT
VOLTAGE CHARGE CURRENT IS 50mA
450
400
350
300
250
200
150
100 RIREF = 50k
50 VIREF = 0 V
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
BATTERY VOLTAGE (V)
FIGURE 4. CHARGE CURRENT vs BATTERY VOLTAGE
500
450
400
RIREF = 50k
350
300
250 RIREF = 100k
200
150 VIREF = 0 V
100
50
0
0
20 40 60
TEMPERATURE (OC)
80
100
FIGURE 5. CHARGE CURRENT vs AMBIENT TEMPERATURE
4
0.45
0.40
0.35
RIREF = 50k
0.30
0.25
0.20
0.15
0.10
VIREF = 0 V
0.05
0.00
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5
INPUT VOLTAGE (V)
FIGURE 6. CHARGE CURRENT vs INPUT VOLTAGE
FN9173.4
March 9, 2006

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ISL6298
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25°C,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted (Continued)
2.920
3.00
2.915
2.95
2.90
2.910
2.85
2.905
LOAD CURRENT = 2 mA
2.900
3.5
4 4.5 5 5.5 6
INPUT VOLTAGE (V)
6.5
FIGURE 7. V2P8 OUTPUT vs INPUT VOLTAGE
2.80
2.75
2.70
0 2 4 6 8 10
LOAD CURRENT (mA)
FIGURE 8. V2P8 OUTPUT vs ITS LOAD CURRENT
1000
900
800
MEASURED WITH THE 3X3
DFN PACKAGE
700
600
500
400
0
20 40 60 80 100 120
TEMPERATURE (OC)
FIGURE 9. rDS(ON) vs TEMPERATURE AT 3.7V OUTPUT
770
730 RIREF = 50k
MEASURED AT 250mA
690
650
3X3 PACKAGE
610
570
530 4X4 PACKAGE
490
450
3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1
BATTERY VOLTAGE (V)
FIGURE 10. rDS(ON) vs OUTPUT VOLTAGE USING CURRENT
LIMITED ADAPTERS
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
20 40 60 80 100
TEMPERATURE (OC)
FIGURE 11. REVERSE CURRENT vs TEMPERATURE
5
50
45
EN PIN GROUNDED
40
35
30
25
20
15
10
5
0
0 20 40 60 80 100
TEMPERATURE (OC)
FIGURE 12. INPUT QUIESCENT CURRENT vs TEMPERATURE
FN9173.4
March 9, 2006