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19-0785; Rev 0; 4/07
High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
General Description
The MAX8804Y/MAX8804Z intelligent, dual-input,
stand-alone, constant-current, constant-voltage
(CCCV), thermally regulated linear chargers are
designed for a single-cell lithium-ion (Li+) battery. They
integrate the current-sense circuit, MOS pass element,
thermal-regulation circuitry, and overvoltage protection
(OVP), and eliminate the reverse-blocking Schottky
diode to create a simple and small charging solution for
handheld equipment.
The MAX8804Z functions as a stand-alone charger to
control the charging sequence from the prequalification
state through fast-charge, top-off charge, and full-
charge indication. The MAX8804Y eliminates the pre-
qualification state to allow startup into a load without a
battery. Proprietary thermal-regulation circuitry limits
the die temperature when fast-charging or while
exposed to high ambient temperatures, allowing maxi-
mum charging current without damaging the IC.
The MAX8804Y/MAX8804Z achieve high flexibility by
providing an adjustable DC/USB fast-charge current
through a simple single-wire interface (SET input). The
chargers automatically select between either a USB or
AC adapter input source. The AC adapter charge cur-
rent is programmable from 400mA to 700mA in 50mA
steps through a serial interface. The USB charge cur-
rent is programmable to 95mA, 380mA, or 475mA
through the same interface. Other features include an
active-low battery charging-status indicator (CHG), an
active-low power-OK indicator (POK), and an active-low
USB input detection output (USBPWR).
The MAX8804Y/MAX8804Z accept a 4.15V to 30V DC
source voltage or a 4.15V to 16V USB input voltage, but
disable charging when either input voltage exceeds
7.5V to protect against unqualified or faulty input
sources. The MAX8804Y/MAX8804Z operate over the
extended temperature range (-40°C to +85°C) and are
available in a tiny 8-pin thermally enhanced 2mm x
3mm TDFN package.
Applications
Cell Phones/Smartphones
Digital Cameras
Portable Media Players
MP3 Players
Other Handheld Devices
Features
Complete Chargers for Single-Cell Li+ Battery
Dual-Input, 30V AC Adapter/16V USB
No External FET, Blocking Diode, or Sense
Resistor Required
Automatic USB/AC Adapter Input Selection
Easy Programmable Fast-Charge Current and
Top-Off Threshold
Proprietary Die Temperature Regulation Control
±5% Fast-Charge Current-Limit Accuracy
Power-Present and Charger-Status Outputs
No Prequalification Charge (MAX8804Y)
Tiny 2mm x 3mm Thermally Enhanced TDFN
Package
USB Charging Protected by US Patent #6,507,172
Ordering Information
PART
PIN-
PACKAGE
PKG
CODE
TOP
MARK
MAX8804YETA+ 8 TDFN-EP*
T823+1
AAD
MAX8804ZETA+ 8 TDFN-EP*
T823+1
AAC
*EP = Exposed paddle.
+Denotes a lead-free package.
Note: All devices are specified to operate over the -40°C to
+85°C operating temperature range.
Typical Application Circuit
+3.3V
AC
ADAPTER
1μF
USB
PORT
1μF
DC
GND
USB
ENABLE/DISABLE
AND PROGRAMMING
SET
CHG
MAX8804Y POK
MAX8804Z
USBPWR
BAT
2.2μF
Li+
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.

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High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
ABSOLUTE MAXIMUM RATINGS
DC to GND .............................................................-0.3V to +30V
USB to GND ...........................................................-0.3V to +16V
BAT, CHG, SET, POK, USBPWR to GND ..............-0.3V to +5.5V
Continuous Power Dissipation (TA = +70°C)
8-Pin TDFN 2mm x 3mm (derate 16.7mW/°C above +70°C)
(multilayer board) .......................................................1333mW
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
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.
ELECTRICAL CHARACTERISTICS
((VDC = 5V, VSET = 0V) or (VUSB = 5V, VSET = 5V), VBAT = unconnected, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
DC AND USB
DC Input Voltage Range
USB Input Voltage Range
Input Operating Range
Input Undervoltage Threshold
Input Overvoltage Threshold
DC Input Supply Current
USB Input Supply Current
DC to BAT On-Resistance
USB to BAT On-Resistance
Input to BAT Comparator
Threshold (Note 2)
BAT
BAT Regulation Voltage
Battery Removal Detection
Threshold
CONDITIONS
(Notes 2, 3)
VIN rising, 500mV hysteresis (typ) (Note 2)
VIN rising, 200mV hysteresis (typ) (Note 2)
VUSB = 0V, IBAT = 0mA, charge mode
VSET = 5V, standby mode
VDC = VBAT = 4.3V, shutdown mode
VDC = 0V, VSET = 5V, IBAT = 0mA, charge mode
VSET = 0V, standby mode
VUSB = VBAT = 4.3V, shutdown mode
VDC = 3.7V, VBAT = 3.6V
VUSB = 3.7V, VBAT = 3.6V
VIN rising
VIN falling
IBAT = 0mA
VBAT rising
Hysteresis
TA = +25°C
TA = -40°C to +85°C
MIN TYP MAX UNITS
0
0
4.15
3.85
7.2
145
4.0
7.5
800
300
300
800
300
300
0.55
0.65
260
55
28
14
7.00
4.15
7.8
1200
550
550
1200
550
550
1.0
1.2
385
V
V
V
V
V
µA
µA
Ω
Ω
mV
4.179
4.158
4.40
4.200
4.200
4.67
0.1
4.221
4.242
4.90
V
V
Default and 1st to 3rd interface
pulse
475 500 525
DC Charging Current
VUSB = 0V,
VBAT = 3.6V,
rising edge detection
on SET
4th to 7th interface pulse
8th to 11th interface pulse
12th to 15th interface pulse
16th to 19th interface pulse
20th to 23rd interface pulse
24th to 27th interface pulse
523 550 578
570 600 630
428 450 473
380 400 420
618 650 683
665 700 735
mA
2 _______________________________________________________________________________________

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High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
ELECTRICAL CHARACTERISTICS (continued)
((VDC = 5V, VSET = 0V) or (VUSB = 5V, VSET = 5V), VBAT = unconnected, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
USB Charging Current
Soft-Start Time
VDC = 0V,
VBAT = 3.6V, rising
edge detection on SET
Default
1st interface pulse
2nd interface pulse
Ramping time from 0 to 500mA
BAT Prequal Threshold
BAT Prequal Charge Current
BAT Leakage Current
SET
Logic Input Thresholds
Logic-High Time
MAX8804Z only, VBAT rising, 300mV hysteresis (typ)
MAX8804Z only
VDC = VUSB = 0V, VBAT = 4.2V
VSET rising
VSET falling
Pulse width required to program DC charge current
Logic-Low Time
SET DC Mode Shutdown Delay
SET USB Mode Shutdown Delay
SET Internal Pulldown Resistor
POK, CHG, USBPWR
Logic Output-Voltage Low
Logic Output-Current High
CHG
Pulse width required to program USB charge current
VUSB = 0V, VDC = 5V, measured from VSET low to high
VDC = 0V, VUSB = 5V, measured from VSET high to low
IPOK = ICHG = IUSBPWR = 5mA
VPOK = VCHG =
VUSBPWR = 5.5V,
VDC = VUSB = 0V
TA = +25°C
TA = +85°C
VDC = 0V, VUSB = 5V
Default, 4th, 8th,
12th, 16th, 20th,
24th, 28th interface
pulse
MIN
90
360
450
2.35
0.4
1
1
1.5
1.5
60
60
TYP
95
380
475
250
2.50
95
2
2
2
60
0.001
0.01
80
80
MAX
100
400
500
2.65
2
UNITS
mA
µs
V
mA
µA
1.6
1000
1000
2.5
2.5
4
V
µs
µs
ms
ms
MΩ
500 mV
1
µA
100
100
CHG Top-Off Threshold
IBAT falling, battery is
charged, rising edge
on SET
VDC = 5V,
VUSB = 0V
1st, 5th, 9th, 13th,
17th, 21st, 25th
interface pulse
2nd, 6th, 10th,
14th, 18th, 22nd,
26th interface pulse
67.5
75
90 112.5
100 125
mA
3rd, 7th, 11th, 15th,
19th, 23rd, 27th
52.7 70 87.5
interface pulse
_______________________________________________________________________________________ 3

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High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
ELECTRICAL CHARACTERISTICS (continued)
((VDC = 5V, VSET = 0V) or (VUSB = 5V, VSET = 5V), VBAT = unconnected, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
CHG Hysteresis
CHG Detection Delay
THERMAL LOOP
IBAT rising after top-off DC mode
is detected (Note 4) USB mode
IBAT falls below top-off threshold
57
mA
51
3 4 5 ms
Thermal-Regulation Set Point
Junction temperature when the charge current is reduced,
TJ rising
+105
°C
Thermal-Regulation Gain
Reduction of IBAT for
increase of TJ
DC charging
USB charging
-40
mA/°C
-24
Note 1: Devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design
and characterization.
Note 2: VIN refers to the input for the IC. For the MAX8804Y/MAX8804Z, VIN is VDC with VUSB = 0V or VUSB with VDC = 0V.
Note 3: Guaranteed by undervoltage and overvoltage threshold testing. For charge completion, the input voltage must be greater
than 4.28V.
Note 4: This hysteresis is for all charge current except 95mA. In the case of 95mA charge current, voltage-mode to current-mode
detection gives indication of charge mode.
Typical Operating Characteristics
(VBAT = 3.6V; DC charge mode: VDC = 5V, VUSB = 0V, VSET = 0V or unconnected; USB charge mode: VUSB = 5V, VDC = 0V, VSET =
5V; TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. INPUT VOLTAGE
(DC CHARGING MODE)
1.0
SUPPLY CURRENT vs. INPUT VOLTAGE
(USB CHARGING MODE)
1.0
DISABLED-MODE SUPPLY CURRENT
vs. INPUT VOLTAGE (DC CHARGING MODE)
0.8
0.8 0.8
0.6
0.6 0.6
0.4
0.4 0.4
0.2
0.2 0.2
0
0 3 6 9 12 15 18 21 24 27 30
INPUT VOLTAGE (V)
0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________

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High-Voltage, Dual-Input, USB/AC
Adapter Chargers in 2mm x 3mm TDFN
Typical Operating Characteristics (continued)
(VBAT = 3.6V; DC charge mode: VDC = 5V, VUSB = 0V, VSET = 0V or unconnected; USB charge mode: VUSB = 5V, VDC = 0V, VSET =
5V; TA = +25°C, unless otherwise noted.)
STANDBY-MODE SUPPLY CURRENT
vs. INPUT VOLTAGE (USB CHARGING MODE)
0.8
CHARGE CURRENT vs. BATTERY VOLTAGE
(DC CHARGING MODE)
600
CHARGE CURRENT vs. BATTERY VOLTAGE
(USB CHARGING MODE)
200
500 160
0.6
400
120
0.4 300
200
0.2
100
80
40
0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
CHARGE CURRENT
vs. DC INPUT VOLTAGE
600
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
CHARGE CURRENT
vs. USB INPUT VOLTAGE
120
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
CHARGE CURRENT vs. SET PULSE
(USB CHARGING MODE)
MAX8804Y/Z toc09
500
90
VSET
1V/div
400
300
200
100
0
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
60
30
0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
475mA
475mA
380mA
ICHG
475mA
380mA
200mA/div
95mA
95mA
95mA
2ms/div
CHARGE CURRENT vs. SET PULSE
(DC CHARGING MODE)
MAX8804Y/Z toc10
VSET
1V/div
700mA
ICHG 550mA 600mA
650mA700mA
200mA/div
450mA
500mA
500mA
400mA
CHARGE CURRENT
vs. INPUT VOLTAGE HEADROOM
600
INPUT VOLTAGE DECREASING
500
400
DC MODE
300
200 USB MODE
100
2ms/div
0
0 100 200 300 400 500
INPUT VOLTAGE HEADROOM (mV)
_______________________________________________________________________________________ 5