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®
Data Sheet
December 2003
ISL6292
FN9105.3
Li-ion/Li Polymer Battery Charger
The ISL6292 is an integrated single-cell Li-ion or Li- polymer
battery charger capable of operating with an input voltage as
low as 2.4V. This charger is designed to work with various
types of ac adapters or a USB port.
The ISL6292 operates as a linear charger when the ac
adapter is a voltage source. The battery is charged in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 2A. The ISL6292 can also work with a current-limited
adapter to minimize the thermal dissipation, in which case
the ISL6292 combines the benefits of both a linear charger
and a pulse charger.
The ISL6292 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space limited for thermal dissipation. Additional features
include preconditioning of an over-discharged battery, an
NTC thermistor interface for charging the battery in a safe
temperature range, automatic recharge, and thermally
enhanced QFN or DFN packages.
Ordering Information
PART # (NOTE) TEMP. RANGE (oC) PACKAGE
PKG.
DWG. #
ISL6292-1CR3
-20 to 70
10 Ld 3x3 DFN L10.3x3
ISL6292-1CR3-T 10 Ld 3x3 DFN Tape and Reel
ISL6292-2CR3
-20 to 70
10 Ld 3x3 DFN L10.3x3
ISL6292-2CR3-T 10 Ld 3x3 DFN Tape and Reel
ISL6292-1CR4
-20 to 70
16 Ld 4x4 QFN L16.4x4
ISL6292-1CR4-T 16 Ld 4x4 QFN Tape and Reel
ISL6292-2CR4
-20 to 70
16 Ld 4x4 QFN L16.4x4
ISL6292-2CR4-T 16 Ld 4x4 QFN Tape and Reel
ISL6292-1CR5
-20 to 70
16 Ld 5x5 QFN L16.5x5B
ISL6292-1CR5-T 16 Ld 5x5 QFN Tape and Reel
ISL6292-2CR5
-20 to 70
16 Ld 5x5 QFN L16.5x5B
ISL6292-2CR5-T 16 Ld 5x5 QFN Tape and Reel
ISL6292EVAL1 Evaluation Board for the 3x3 DFN Package Part.
ISL6292EVAL2 Evaluation Board for the 4x4 QFN Package Part.
NOTE: " Z " Suffix: Intersil Lead Free products employ special lead
free material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which is compatible with both SnPb
and lead free soldering operations. Intersil Lead Free products are
MSL classified at lead free peak reflow temperatures that meet or
exceed the lead free requirements of IPC/JEDEC J Std-020B.
Add a “Z” to the end of the part # above for lead-free packages, e.g.,
“ISL6292-1CR3Z-T” is the part # for the lead-free ISL6292-1CR3-T.
Features
• Complete Charger for Single-Cell Li-ion Batteries
• Very Low Thermal Dissipation
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 2A
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• Accepts Multiple Types of Adapters or USB BUS
Power
• Guaranteed to Operate at 2.65V After Start Up
• Ambient Temperature Range: -20oC to 70oC
• Thermally-Enhanced QFN Packages
• Lead-Free Package Option Available ("Z" suffix)
Applications
• Handheld Devices including Medical Handhelds
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Self-Charging Battery Packs
• Stand-Alone Chargers
• USB Bus-Powered 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
ISL6292 (16 LEAD QFN)
TOP VIEW
ISL6292 (10 LEAD DFN)
TOP VIEW
VIN
16 15 14 13
FAULT
VIN 1
12 VBAT
STATUS
FAULT 2
STATUS 3
11 TEMP
10 IMIN
TIME
TIME 4
9 IREF
GND
1
2
3
4
5
5678
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 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.

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ISL6292
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7V
Output Pin Voltage (BAT) . . . . . . . . . . . . . . . . . . . . . . . -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 (For 4x4 or 5x5 QFN Packages) . . . . . . . . . . . 2.1A
Charge Current (For 3x3 DFN Package) . . . . . . . . . . . . . . . . . 1.6A
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7) . . .1500V
Machine Model (Per EIAJ ED-4701 Method C-111) . . . . . . .150V
Recommended Operating Conditions
Ambient Temperature Range. . . . . . . . . . . . . . . . . . . -20oC to 70oC
Supply Voltage, VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3V to 6.5V
Thermal Information
Thermal Resistance (Junction to Ambient) (Note 1)
θJA (oC/W)
5x5 QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4x4 QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3x3 DFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Thermal Resistance (Junction to Case) (Note 2)
θJC (oC/W)
5x5 QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4x4 QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3x3 DFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC
Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC
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.
NOTE:
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 25oC Ambient Temperature, maximum and minimum values are
guaranteed over 0oC to 70oC 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
3.2 3.4 3.8
V
Falling VIN Threshold
2.3 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
Dropout Voltage
VCH
VCH
ISL6292-1
4.059 4.10 4.141
ISL6292-2
4.158 4.20 4.242
VBAT = 3.7V, 0.5A, 4X4 or 5X5 package
-
140
-
V
V
mV
Dropout Voltage
VBAT = 3.7V, 0.5A, 3X3 package
- 175 - mV
CHARGE CURRENT
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Trickle Charge Current
End-of-Charge Threshold
RECHARGE THRESHOLD
ICHARGE
ITRICKLE
ICHARGE
ITRICKLE
ICHARGE
ITRICKLE
RIREF = 80k, VBAT = 3.7V
RIREF = 80k, VBAT = 2.0V
IREF Pin Voltage > 1.2V, VBAT = 3.7V
IREF Pin Voltage > 1.2V, VBAT = 2.0V
IREF Pin Voltage < 0.4V, VBAT = 3.7V
IREF Pin Voltage < 0.4V, VBAT = 2.0V
RIMIN = 80k
0.9 1.0 1.1
- 110 -
400 450 500
- 45 -
- - 100
- 10 -
85 110 135
A
mA
mA
mA
mA
mA
mA
Recharge Voltage Threshold
Recharge Voltage Threshold
VRECHRG
VRECHRG
ISL6292-2
ISL6292-1
- 4.0 -
- 3.90 -
V
V
2

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ISL6292
Electrical Specifications
Typical values are tested at VIN = 5V and 25oC Ambient Temperature, maximum and minimum values are
guaranteed over 0oC to 70oC 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
TEMPERATURE MONITORING
VMIN
2.7 2.8 3.0
V
Low Battery Temperature Threshold
High Battery Temperature Threshold
Battery Removal Threshold
Charge Current Foldback Threshold
Current Foldback Gain
OSCILLATOR
VTMIN
VTMAX
VRMV
TFOLD
GFOLD
V2P8 = 3.0V
V2P8 = 3.0V
V2P8 = 3.0V
1.40 1.50 1.60
V
0.34 0.38 0.42
V
- 2.25 -
V
85 100 115 oC
- 100 - mA/oC
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
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25oC,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted
4.2015
4.201
4.2005
4.2
RIREF = 40k
4.1995
4.199
4.1985
4.198
4.1975
0
0.3 0.6 0.9 1.2
CHARGE CURRENT (A)
1.5
FIGURE 1. CHARGER OUTPUT VOLTAGE vs CHARGE
CURRENT
4.210
4.208
4.206
CHARGE CURRENT = 50mA
4.204
4.202
4.200
4.198
4.196
4.194
4.192
4.190
0
20 40 60 80 100 120
TEMPERATURE (oC)
FIGURE 2. CHARGER OUTPUT VOLTAGE vs TEMPERATURE
3

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ISL6292
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25oC,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted (Continued)
4.3
4.25
CHARGE CURRENT = 50mA
4.2
4.15
4.1
4.2 4.5 4.8 5.1 5.4 5.7 6
6.3
VIN (V)
FIGURE 3. CHARGER OUTPUT VOLTAGE vs INPUT
VOLTAGE CHARGE CURRENT IS 50mA
2
1.8
2A
1.6
1.4
1.5A
1.2
1A
1
0.8
0.6 0.5A
0.4 USB500
0.2
USB100
0
3 3.2 3.4 3.6 3.8 4
VBAT (V)
FIGURE 4. CHARGE CURRENT vs OUTPUT VOLTAGE
1.6
1.4
1.5A
1.2
1.0
1.0A
0.8
0.6
0.4 0.5A
0.2
0.0
0
20 40 60 80 100 120
TEMPERATURE (oC)
FIGURE 5. CHARGE CURRENT vs AMBIENT TEMPERATURE
2
1.8
1.6
1.4
1.5A
1.2
2A
1
1A
0.8
0.6 0.5A
0.4
0.2 USB100
USB500
0
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5
VIN (V)
FIGURE 6. CHARGE CURRENT vs INPUT VOLTAGE
2.93
2.928
V2P8 PIN LOADED WITH 2mA
2.926
2.924
2.922
2.92
3.5 4 4.5 5 5.5 6
VIN (V)
FIGURE 7. V2P8 OUTPUT vs INPUT VOLTAGE
6.5
4
3
2.95
2.9
2.85
2.8
2.75
2.7
0
24 68
V2P8 LOAD CURRENT (mA)
10
FIGURE 8. V2P8 OUTPUT vs ITS LOAD CURRENT

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ISL6292
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25oC,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted (Continued)
700
650
THERMAL FOLDBACK STARTS
NEAR 100oC
600
550
500
450
400
3x3 DFN
350
300 4x4 QFN
250
200
0
20 40 60 80 100 120
TEMPERATURE (oC)
FIGURE 9. rDS(ON) vs TEMPERATURE AT 3.7V OUTPUT
420
500mA CHARGE CURRENT,
400 RIREF = 40k
380
360
3x3 DFN
340
320
4x4 QFN
300
280
260
3.0 3.2 3.4 3.6 3.8 4.0
VBAT (V)
FIGURE 10. rDS(ON) vs OUTPUT VOLTAGE USING CURRENT
LIMITED ADAPTERS
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
20 40 60 80 100 120
TEMPERATURE (oC)
FIGURE 11. REVERSE CURRENT vs TEMPERATURE
32
30 EN = GND
28
26
24
22
20
18
16
14
12
10
3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
FIGURE 13. INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE WHEN SHUTDOWN
6.5
5
50
45 EN = GND
40
35
30
25
20
15
10
5
0
0 20 40 60 80 100 120
TEMPERATURE (oC)
FIGURE 12. INPUT QUIESCENT CURRENT vs TEMPERATURE
1.10
1.05
1.00
0.95
0.90
BOTH VBAT AND EN
PINS FLOATING
0.85
0.80
4.3 4.6 4.9 5.2 5.5 5.8 6.1 6.4
VIN (V)
FIGURE 14. INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE WHEN NOT SHUTDOWN