General Description
The MAX8600/MAX8601 single-/dual-input linear bat-
tery chargers safely charge single-cell Li+ batteries.
The charging rate is optimized to accommodate the
thermal characteristics of a given application. There is
no need to reduce the maximum charge current or
worst-case charger power dissipation. Charging is opti-
mized for Li+ cells using a control algorithm that
includes low-battery precharging, voltage and current-
limited fast-charging, and top-off charging, while con-
tinuously monitoring the battery for overvoltage,
over/undertemperature, and charging time. The charg-
er timeout protection is programmable. The charger
status is indicated by three open-drain outputs.
The MAX8601 automatically selects between either a
USB or AC adapter input source. The AC adapter
charge current is programmable, while USB charge
current is set not to exceed either 100mA or 500mA,
depending on the USEL input. The MAX8600 is a sin-
gle-input charger with no USB source input.
The MAX8600/MAX8601 are available in the tiny 3mm x
3mm power-enhanced TDFN package.
Applications
Cell Phones Portable Media Players
Digital Cameras MP3 Players
PDAs Wireless Appliances
Features
♦Single- (MAX8600) or Dual- (MAX8601) Input Li+
Charger
♦Up to 1A Programmable Fast-Charge
♦100mA/500mA USB Select Input (MAX8601)
♦±5% Fast-Charge Current-Limit Accuracy
♦14V Input Overvoltage Protection
♦Programmable On-Chip Charge Timers
♦Battery Thermistor Input
♦Charger-Status Outputs
♦Thermally Optimized Charge Rate
♦14-Pin 3mm x 3mm TDFN Package
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
________________________________________________________________ Maxim Integrated Products 1
19-3565; Rev 1; 3/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
Ordering Information
PART TEMP
RANGE PIN-PACKAGE TOP
MARK
MAX8600ETD -40°C to
+85°C
14 TDFN-EP* 3mm x 3mm
(T1433-2) ABB
MAX8601ETD -40°C to
+85°C
14 TDFN-EP* 3mm x 3mm
(T1433-2) AAC
Pin Configurations continued at end of data sheet.
BAT
Li+
CT
THM
AC
ADAPTER
USB
PORT
GND
USB
EN
OFF
ON
FLT
+5V
CHARGE
STATUS
DC
SETI
USEL
POK
CHG
MAX8601
500mA
100mA
Typical Operating Circuit
8
9
10
11
12
13
14
7
6
5
4
3
2
1
MAX8600
TDFN
TOP VIEW
SETI
BAT
THM
GND
CT
N.C.
N.C.
FLT
DC
DC
CHG
POK
N.C.
EN
Pin Configurations
*EP = Exposed paddle.
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC, USB to GND ....................................................-0.3V to +16V
BAT, CT, CHG, EN, FLT, SETI,
POK, THM, USEL to GND..................................-0.3V to +5.5V
Continuous Power Dissipation (TA= +70°C)
14-Pin TDFN 3mm x 3mm (derate 18.2mW/°C
above +70°C)............................................................ 1454mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(VDC = VUSB = 5V, VBAT = 4V, V EN = 0V, RSETI = 2kΩ, CCT = 0.068µF, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C. Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC OR USB (Note 2)
Input Voltage Range 014V
Input Operating Range (Note 3) 4.15 7.00 V
Input Undervoltage Threshold Input rising, 500mV hysteresis (typ) 3.85 4.0 4.15 V
Input Overvoltage Threshold Input rising, 200mV hysteresis (typ) 7.2 7.5 7.8 V
Input Overvoltage Delay From overvoltage event to charger disabled 0.25 s
Input Supply Current IBAT = 0mA, RTHM = 10kΩ750 1200 µA
Shutdown Input Current VEN = 5V, TA = +25°C 275 435 µA
Input to BAT On-Resistance Input = 3.7V, VBAT = 3.6V 0.5 0.8 Ω
Input to BAT Dropout Voltage Input falling, 200mV hysteresis (typ) 5 55 120 mV
BAT
TA = +25°C 4.179 4.2 4.221
BAT Regulation Voltage IBAT = 0mA TA = -40°C to +85°C 4.166 4.2 4.234 V
BAT Restart Fast-Charge
Threshold From BAT regulation voltage -180 -150 -120 mV
RSETI = 1.5kΩ950 1000 1050
RSETI = 2kΩ727 750 773
RSETI = 5kΩ280 300 320
DC Charging Current VUSB = 0V
Prequal, RSETI = 2kΩ, VBAT = 2.5V 60 75 90
mA
VUSEL = 5V 450 475 500
VUSEL = 0V 80 95 100USB Charging Current VDC = 0V
Prequal, RSETI = 2kΩ, VBAT = 2.5V 60 75 90
mA
Soft-Start Time Ramp time to fast-charge current 1.2 ms
BAT Prequal Threshold VBAT rising, 180mV hysteresis (typ) 2.9 3 3.1 V
BAT Leakage Current VDC = VUSB = 0V, VBAT = 4.2V 0.001 5 µA
SETI
RSETI Resistance Range (Note 4) 1.5 5.0 kΩ
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VDC = VUSB = 5V, VBAT = 4V, V EN = 0V, RSETI = 2kΩ, CCT = 0.068µF, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C. Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
EN, USEL
Rising 1.6
Logic Input Thresholds Falling 0.4 V
TA = +25°C 0.001 1
Logic Input Leakage Current V
EN = VUSEL = 0 to 5.5V TA = +85°C 0.01 µA
POK, CHG, FLT
Logic Output Voltage, Low I
POK, = I
CHG = I
FLT = 1mA 12 100 mV
TA = +25°C 0.001 1
Logic Output Leakage
Current, High
V
POK = V
CHG = V
FLT = 5.5V,
VDC = VUSB = 0V TA = +85°C 0.01 µA
CHG
RSETI = 1.5kΩ75
RSETI = 2kΩ37.5 56.25 75.0CHG/Top-Off Threshold IBAT falling, battery is
charged
RSETI = 5kΩ22.5
mA
THM
THM Pullup Resistance 10 kΩ
THM Resistance, Hot RTHM falling, 420Ω hysteresis (typ) 3.72 3.94 4.13 kΩ
THM Resistance, Cold RTHM rising, 2.7kΩ hysteresis (typ) 26.7 28.3 29.7 kΩ
THM Resistance, Disabled RTHM falling, 230Ω hysteresis (typ) 274 309 337 Ω
CT
Timer Accuracy CCT = 0.068µF -20 +20 %
Prequal Time Limit From entering prequal to FLT low, VBAT < 3V 34.8 min
Charge Time Limit From entering fast-charge to FLT low, 3V < VBAT < 4.2V 334 min
Top-Off Time Limit From CHG high to charger disabled 34.8 min
THERMAL LOOP
Thermal-Limit Temperature Juncti on tem p er atur e w hen the char g e cur r ent i s r ed uced ,
TJ
r i si ng +100 °C
Thermal-Limit Gain Reduction of IBAT for increase of TJ, from VDC, RSETI = 1.5kΩ-50 mA/°C
Note 1: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design
and characterization.
Note 2: Input refers to either DC or USB.
Note 3: Guaranteed by undervoltage- and overvoltage-threshold testing. For complete charging, the input voltage must be greater
than 4.32V. See the Applications Information section.
Note 4: Guaranteed by the current-limit test.
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VDC = 5V, RSETI = 2kΩ, VBAT = 3.6V, MAX8601 evaluation kit with thermal resistance of 50°C/W. TA= +25°C, unless otherwise noted.)
0
300
200
100
500
400
900
800
700
600
1000
0 2 4 6 8 10 12 14
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX8600/01 toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
VEN = 0V
0
300
200
100
500
400
900
800
700
600
1000
02468101214
DISABLED SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX8600/01 toc02
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
VEN = 5V
0
200
400
600
800
1000
01.00.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5
CHARGE CURRENT
vs. BATTERY VOLTAGE
MAX8600/01 toc03
VBAT (V)
CHARGE CURRENT (mA)
DASHED DATA TAKEN
WITH PULSE TESTING TO
AVOID THERMAL LIMIT
RSETI = 1.5kΩ
RSETI = 2kΩ
RSETI = 3kΩ
0
200
400
600
800
1000
02468101214
CHARGE CURRENT
vs. DC VOLTAGE
MAX8600/01 toc04
VDC (V)
CHARGE CURRENT (mA)
RSETI = 1.5kΩ
RSETI = 2kΩ
RSETI = 3kΩ
DASHED DATA
TAKEN WITH PULSE
TESTING TO AVOID
THERMAL LIMIT
0
200
100
400
300
700
600
500
800
04268101214
CHARGE CURRENT vs. USB VOLTAGE
MAX8600/01 toc05
VUSB (V)
CHARGE CURRENT (mA)
VUSEL = 0V
VUSEL = 5V
DASHED DATA TAKEN WITH
PULSE TESTING TO AVOID THERMAL LIMIT
0
200
100
400
300
600
500
700
900
800
1000
0 0.2 0.3 0.40.1 0.5 0.6 0.7 0.90.8 1.0
CHARGE CURRENT vs. INPUT
VOLTAGE HEADROOM
MAX8600/01 toc06
(VIN - VBAT) (V)
CHARGE CURRENT (mA)
4.180
4.190
4.185
4.200
4.195
4.205
4.210
-40 10-15 35 60 85
BATTERY REGULATION
VOLTAGE vs. AMBIENT TEMPERATURE
MAX8600/01 toc07
TA (°C)
BATTERY REGULATION VOLTAGE (V)
0
300
200
100
400
500
600
700
800
900
1000
-40 10-15 35 60 85
CHARGE CURRENT vs. AMBIENT
TEMPERATURE (750mA CHARGE)
MAX8600/01 toc08
TA (°C)
CHARGE CURRENT (mA)
VBAT = 4V
VBAT = 3.6V
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
_______________________________________________________________________________________ 5
PIN
MAX8600 MAX8601 NAME FUNCTION
1 1, 7 BAT
Battery Connection. The IC delivers charging current and monitors battery voltage using BAT.
Bypass BAT to GND with a 2.2µF or larger ceramic capacitor. Connect both BAT inputs
together externally (MAX8601). BAT is high impedance when the IC is disabled.
2 2 SETI
DC Charge-Current Programming Input. Connect a resistor from SETI to GND to set the
maximum charging current when using the DC input, the prequal current from either input, and
the CHG turn-off threshold.
3 3 THM
Thermistor Input. Connect a 10kΩ NTC thermistor, in close proximity to the battery, from THM
to ground to monitor the battery temperature. Connect THM to GND to disable the thermistor
functionality. The IC suspends charging when RTHM is outside the hot and cold limits.
4 4 GND Ground
55CT
Timing Capacitor Input. Connect a capacitor from CT to GND to set the precharge timeout,
top-off time, and fast-charge timeout. Connect CT to GND to disable the timers.
6, 7, 9 — N.C. No Connection. Make no external circuit connection.
88EN Active-Low Enable Input. Drive low or connect EN to GND to enable the charger. Drive EN high
to disable the charger.
10 10 POK Power-OK Monitor. POK is an open-drain output that pulls low when a valid charging source is
detected at either DC or USB (MAX8601). POK is high impedance when EN is high.
11 11 CHG
Charging-Status Output. CHG goes low when the battery is above 3V and being charged with
a current greater than 7.5% of the current programmed with RSETI. CHG is high impedance
when the charger is in prequal, top-off, or disabled.
Pin Description
Typical Operating Characteristics (continued)
(VDC = 5V, RSETI = 2kΩ, VBAT = 3.6V, MAX8601 evaluation kit with thermal resistance of 50°C/W. TA= +25°C, unless otherwise noted.)
100
400
300
200
500
600
700
800
900
1000
1100
-40 10-15 35 60 85
CHARGE CURRENT vs. AMBIENT
TEMPERATURE (1A CHARGE)
MAX8600/01 toc09
TA (°C)
CHARGE CURRENT (mA)
VBAT = 4V
VBAT = 3.6V
RSETI = 1.5kΩ
0
100
200
300
400
500
600
700
800
0.010 0.045 0.080 0.115 0.150
FAST-CHARGE TIME vs. CCT
MAX8600/01 toc10
CCT (µF)
FAST-CHARGE TIME (MIN)
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
6 _______________________________________________________________________________________
PIN
MAX8600 MAX8601 NAME FUNCTION
12, 13 12, 13 DC
DC Input Supply. Connect DC to a 4.5V to 7V charging source. Bypass DC to GND with a 1µF
or larger capacitor. DC takes priority over USB when both are present (MAX8601). Both DC
inputs should be connected together externally.
14 14 FLT
Fault Status Output. FLT goes low when either the prequal timer or the fast-charge timers
expire and the battery voltage is not above the required threshold. Clear the fault by raising EN
or removing input power.
— 9 USB USB Input Source. Connect to a USB port. Bypass USB to GND with a 1µF or larger capacitor.
— 6 USEL USB Charge-Select Input. Logic input that determines the maximum charge current drawn
from the USB input. IBAT = 95mA when USEL = low, and IBAT = 475mA when USEL = high.
— — EP Exposed Paddle. Connect to the GND plane for optimum thermal dissipation.
Pin Description (continued)
ANY STATE
FAULT
CHG = HIGH
FLT = LOW
VBAT > 3V
RTHM > 3.97kΩ AND
RTHM < 28.7kΩ
RTHM > 3.97kΩ AND
RTHM < 28.7kΩ
RTHM < 3.97kΩ OR
RTHM > 28.7kΩ
RTHM < 3.97kΩ OR
RTHM > 28.7kΩ
IBAT < 112.5 / RSETI
AND VOLTAGE MODE
VIN < 4.1V OR
VIN < 7.5V OR
VIN < VBAT OR
EN HIGH
VBAT < 3V AND
PREQUAL
TIMEOUT
IBAT > 112.5 / RSETI
AND FAST-CHARGE
TIMEOUT
TOP-OFF
TIMEOUT
OFF
POK = HIGH, CHG = HIGH, FLT = HIGH
IBAT = 0A
EN LOW AND
POWER-GOOD
PREQUAL
POK = LOW, CHG = HIGH
IBAT = 150 / RSETI
DONE
POK = LOW, CHG = HIGH
IBAT = 0A
TOP-OFF
POK = LOW, CHG = HIGH
FAST-CHARGE
POK = LOW, CHG = LOW
IBAT(DC) = 1500 / RISET
IBAT(USB) = 100mA / 500mA
THM OUT OF RANGE
POK = PREVIOUS STATE
CHG = PREVIOUS STATE
IBAT = 0A
PREQUAL TIMER HELD
THM OUT OF RANGE
POK = PREVIOUS STATE
CHG = PREVIOUS STATE
IBAT = 0A
FAST-CHARGE TIMER HELD
Figure 1. Charger State Diagram
Detailed Description
DC Charging
The MAX8600/MAX8601 are designed to charge a sin-
gle-cell Li+ battery from a DC source voltage between
4.5V and 7V. The precharge current, charge current,
and top-off threshold are programmable with RSETI.
USB Charging (MAX8601)
The MAX8601 contains a USB input that allows opera-
tion from either a DC source or a USB port. A USEL input
allows the user to select either a 100mA or 500mA maxi-
mum charging current when using the USB input. If both
VUSB and VDC are valid, the MAX8601 operates from
DC. If VDC is invalid (undervoltage/overvoltage), the
MAX8601 operates from USB. When charging at 100mA
from the USB input, the fast-charge timer is inhibited.
EN
Charger-Enable Input
EN is a logic input (active low) that enables the charger.
Drive EN high to disable the charger-control circuitry.
Drive EN low or connect to GND for normal operation.
Soft-Start
To prevent input transients, the rate of change of
charging current is limited. When the charger is turned
on or when the input source is changed, charge current
is ramped from 0 to the set current value in typically
1.2ms. This also means that if charging is taking place
from USB, and the DC input is then powered, charge
current falls to zero and then is reramped to the DC
charge rate. This is done to ensure that the DC source
is not subjected to a severe load current step.
Charge-current ramp up is also limited when transition-
ing from prequal to fast-charge, and when changing
the USB charge current from 100mA to 500mA with
USEL. There is no dI/dt limiting, however, if ISET is
changed suddenly using a switch at RSETI.
Thermal-Limit Control
The MAX8600/MAX8601 feature a thermal limit that
reduces the charge current when the die temperature
exceeds +100°C. As the temperature increases above
+100°C, the IC lowers the charge current by 50mA/°C.
CHG
Charge-Indicator Output
CHG is an open-drain output that indicates charger sta-
tus. CHG goes low during charge cycles where VBAT is
greater than 3V and IBAT is greater than 7.5% of the
maximum charge current set by RSETI. When the
MAX8600/MAX8601 are used in conjunction with a
microprocessor (µP), connect a pullup resistor between
CHG and the logic I/O voltage to indicate charge status
to the µP. Alternatively, CHG can sink up to 20mA for
an LED charge indicator.
Fault Indicator (
FLT
)
The MAX8600/MAX8601 contain an open-drain FLT
output to signal the user when a fault occurs. FLT goes
low if the charger is in prequal and the prequal timer
expires, or if the charger is in fast-charge and the fast-
charge time expires. FLT does NOT go low if the THM
thermistor temperature is out of range. Toggle EN or
the input power to reset the FLT indicator.
Power-OK Indicator (
POK
)
The MAX8600/MAX8601 contain an open-drain POK
output that goes low when a valid input source is
detected at DC or USB (MAX8601 only). A valid input
source is one whose voltage is between 4.5V and 7V
and exceeds the battery voltage by 240mV. After a
valid input has been established, charging is sustained
with inputs as low as 3.5V as long as the input voltage
remains above the battery voltage by at least 55mV.
POK is high impedance when the charger is disabled.
Applications Information
Figure 2 shows the typical operating circuit for the
MAX8601. The following section describes component
changes for different charging current and timer durations.
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
_______________________________________________________________________________________ 7
BAT
NTC
10kΩ AT
+25°C
RSETI
2kΩ
CT
THM
AC ADAPTER
4.5V TO 7V
(OVP TO 16V)
USB PORT
4.5V TO 5.5V
GND
USB
EN
OFF
ON
FLT
TO LOGIC
SUPPLY
(3.3V)
100kΩ100kΩ330Ω
FAULT
POWER-OK
CCT
0.068µF
1µF
DC
SETI
USEL
POK
CHG
MAX8601
500mA
100mA
2.2µF
Figure 2. Typical Operating Circuit for USB/AC-Adapter Input
Charger. An RSETI of 2kΩsets an AC adapter fast-charge of
750mA.
MAX8600/MAX8601
Charge Current Selection
The maximum charging current from a supply connect-
ed to DC is programmed by an external resistor (RSETI)
connected from SETI to GND. Calculate the RSETI value
as follows:
RSETI = 1500 / ICHARGE(MAX)
where ICHARGE(MAX) is in amps and RSETI is in ohms.
SETI can also be used to monitor the actual charge-
current level. The output voltage at SETI is proportional
to the charging current as follows:
VSETI = (ICHARGE x RSETI) / 1000
Note that the prequal current for both USB and DC
input operation is 1/10 of the fast-charge current set by
RSETI. Also, the top-off charge-current threshold for
both USB and DC input operation is set to 7.5% of the
fast-charge current set by RSETI.
IPREQUAL = 150 / RSETI
ITOP-OFF = 112.5 / RSETI
Timer Capacitor Selection
The MAX8600/MAX8601 contain timers for prequal,
fast-charge, and top-off operation. These time periods
are determined by the capacitance from CT to GND. To
set the charge times, calculate CCT as follows:
TFASTCHARGE = 334min x (CCT / 0.068µF)
TPREQUAL = TTOPOFF = 34.8min x (CCT / 0.068µF)
Note that when charging at 100mA from the USB input
(MAX8601), the fast-charge timer is inhibited. When THM
halts charging, the timers stop and hold their value.
Battery Temperature Control
The MAX8600/MAX8601 monitor battery temperature
through a negative TC thermistor which is in close ther-
mal contact with the battery. Select a thermistor resis-
tance that is 10kΩat +25°C and has a beta of 3500.
The IC compares the resistance from THM to GND and
suspends charging when it is greater than 28.3kΩor
less than 3.94kΩ, which translates to a temperature of
0°C to +50°C. Table 1 shows the nominal temperature
limits that result from a wide range of available thermis-
tor temperature curves. The curves are defined by the
following equation:
where βis the BETA term in Table 1.
Connect THM to GND to disable the temperature-con-
trol function. When RTHM disables charging, all timers
pause and hold their value.
Capacitor Selection
Connect a 2.2µF ceramic capacitor from BAT to GND
for proper stability. Connect a 1µF ceramic capacitor
from DC to GND. If using the USB input for the
MAX8601, bypass USB to GND with a 1µF ceramic
capacitor. Use a larger input bypass capacitor for high
charging currents to reduce supply noise. All capaci-
tors should be X5R dielectric or better. Be aware that
some capacitors have large voltage coefficients and
should be avoided.
Thermal Considerations
The MAX8600/MAX8601 are in a thermally enhanced
TDFN package with an exposed paddle. Connect the
exposed paddle of the package to a large copper
ground plane to provide a thermal contact between the
device and the circuit board. The exposed paddle
transfers heat away from the device, allowing the IC to
charge the battery with maximum current, while mini-
mizing the increase in die temperature. Note that the
MAX8600/MAX8601s’ thermal-limit control allows the
charger to be tolerant of thermally restricted PC board
layouts that are sometimes unavoidable in compact
portable designs. With such non-optimal layouts, the
charger still operates, but may reduce charge current
to manage temperature rise.
RR T
TCe
=+
⎛
⎝
⎜⎞
⎠
⎟⎛
⎝
⎜⎞
⎠
⎟
⎡
⎣
⎢⎤
⎦
⎥
⎧
⎨
⎪
⎩
⎪
⎫
⎬
⎪
⎭
⎪
°×
−
25
1
273
1
298
β
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
8 _______________________________________________________________________________________
THERMISTOR BETA 3000 3250 3500 3750
Resistance at +25°C 10,000Ω10,000Ω10,000Ω10,000Ω
Resistance at +50°C 4587.78Ω4299.35Ω4029.06Ω3775.75Ω
Resistance at 0°C 25,140.55Ω27,148.09Ω29,315.94Ω31,656.90Ω
Nominal Hot Trip Temperature +55.14°C +52.60°C +50.46°C +48.63°C
Nominal Cold Trip Temperature -3.24°C -1.26°C +0.46°C +1.97°C
Table 1. Fault Temperatures for Different Thermistors
DC Input Sources
The MAX8600/MAX8601 operating input voltage range
is 4.15V to 7V. The device survives input voltages up to
16V without damage to the IC. If the input voltage is
greater than 7.5V (typ), the IC stops charging. An
appropriate power supply must provide at least 4.2V
plus the voltage drop across the internal pass transistor
when sourcing the desired maximum charging current.
VIN(MIN) > 4.2V + ICHARGE(MAX) x RON
where RON is the input-to-BAT resistance (typically
0.5Ω). Failure to meet this requirement results in an
incomplete charge or increased charge time.
Stand-Alone Li+ Charger
The MAX8600 provides a complete Li+ charging solu-
tion. Figure 3 shows the MAX8600 as a stand-alone Li+
battery charger. The 2kΩresistor connected to SETI
sets a charging current of 750mA. The LED indicates
when fast-charge has begun. When fast-charge is com-
plete, the LED turns off.
USB-Powered Li+ Charger (MAX8601)
The universal serial bus (USB) provides a high-speed
serial communication port as well as power for the
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
_______________________________________________________________________________________ 9
BAT
Li+
CT
THM
VBUS
GND
D+
D-
500mA
USB PORT
GND
EN
FLT
VI/O
USB
DC
USEL
SETI
POK
R5
100kΩ
C2
2.2µF
C1
1µF
C3
0.068µF
R1
2kΩ
R3, R4
100kΩ
R2
10kΩ
CHG
MAX8601
SYSTEM
Figure 4. USB Battery Charger with the MAX8601
BAT
Li+
CT
THM
AC
ADAPTER GND
EN
FLT
+5V
CHARGE
STATUS
D1
GREEN LED
DC
SETI
POK
C1
1µF
R5
1kΩ
C3
2.2µF
C4
0.068µF
R1
2kΩ
R3, R4
100kΩ
R2
10kΩ
CHG
MAX8600
OFF
ON
Figure 3. Stand-Alone Li+ Battery-Charger with the MAX8600
MAX8600/MAX8601
remote device. The MAX8601 can be configured to
charge its battery at the highest current possible from
the host port. Figure 4 shows the MAX8601 configured
as a USB battery charger. A USEL input sets the maxi-
mum charging current from the USB input at 100mA or
500mA.
Layout and Bypassing
Connect the input capacitors as close to the device as
possible. Provide a large copper GND plane to allow the
exposed paddle to sink heat away from the device.
Connect the battery to BAT as close to the IC as possi-
ble to provide accurate battery voltage sensing. Make
all high-current traces short and wide to minimize volt-
age drops. For an example layout, refer to the MAX8601
evaluation kit.
Chip Information
TRANSISTOR COUNT: 6838
PROCESS: BiCMOS
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
10 ______________________________________________________________________________________
TOP VIEW
8
9
10
11
12
13
14
7
6
5
4
3
2
1
MAX8601
TDFN
SETI
BAT
THM
GND
CT
USEL
BAT
FLT
DC
DC
CHG
POK
USB
EN
Pin Configurations (continued)
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
______________________________________________________________________________________ 11
6, 8, &10L, DFN THIN.EPS
L
CL
C
PIN 1
INDEX
AREA
D
E
L
e
L
A
e
E2
N
G
12
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
k
e
[(N/2)-1] x e
REF.
PIN 1 ID
0.35x0.35
DETAIL A
b
D2
A2
A1
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX8600/MAX8601
Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
COMMON DIMENSIONS
SYMBOL MIN. MAX.
A0.70 0.80
D2.90 3.10
E2.90 3.10
A1 0.00 0.05
L0.20 0.40
PKG. CODE ND2 E2 eJEDEC SPEC b[(N/2)-1] x e
PACKAGE VARIATIONS
0.25 MIN.k
A2 0.20 REF.
2.30±0.101.50±0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40±0.05
1.95 REF0.30±0.05
0.65 BSC
2.30±0.108T833-1
2.00 REF0.25±0.05
0.50 BSC
2.30±0.1010T1033-1
2.40 REF0.20±0.05- - - -
0.40 BSC
1.70±0.10 2.30±0.1014T1433-1
1.50±0.10
1.50±0.10
MO229 / WEEC
MO229 / WEED-3
0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10
T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF
T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
-DRAWING NOT TO SCALE- G
22
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
DOWNBONDS
ALLOWED
NO
NO
NO
NO
YES
NO
YES
NO
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX8600
Part Number Table
ENGLISH • 简体中文 • 日本語 • 한국어
WHAT'S NEW PRODUCTS SOLUTIONS DESIGN APPNOTES SUPPORT BUY COMPANY MEMBERS
Didn't Find What You Need?
Notes:
1. See the MAX8600 QuickView Data Sheet for further information on this product family or download the
MAX8600 full data sheet (PDF, 184kB).
2. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
3. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within
one business day.
4. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: See full
data sheet or Part Naming Conventions.
5. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the
product uses.
Part Number Free
Sample
Buy
Direct Package: TYPE PINS SIZE
DRAWING CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX8600ETD+
Sample
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433+2*
-40°C to +85°C RoHS/Lead-Free: Yes
Materials Analysis
MAX8600ETD+T
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433+2*
-40°C to +85°C RoHS/Lead-Free: Yes
Materials Analysis
CONTACT US: SEND US AN EMAIL
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MAX8601
Part Number Table
ENGLISH • 简体中文 • 日本語 • 한국어
WHAT'S NEW PRODUCTS SOLUTIONS DESIGN APPNOTES SUPPORT BUY COMPANY MEMBERS
Didn't Find What You Need?
Notes:
1. See the MAX8601 QuickView Data Sheet for further information on this product family or download the
MAX8601 full data sheet (PDF, 184kB).
2. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
3. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within
one business day.
4. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: See full
data sheet or Part Naming Conventions.
5. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the
product uses.
Part Number Free
Sample
Buy
Direct Package: TYPE PINS SIZE
DRAWING CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX8601ETD+
Sample
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433+2*
-40°C to +85°C RoHS/Lead-Free: Yes
Materials Analysis
MAX8601ETD
Sample
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX8601ETD+T
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433+2*
-40°C to +85°C RoHS/Lead-Free: Yes
Materials Analysis
MAX8601ETD-T
Buy THIN QFN (Dual);14 pin;3X3X0.8mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1433-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
CONTACT US: SEND US AN EMAIL
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