19-1011; Rev 0; 10/07
MAX8663 Evaluation Kit
General Description
The MAX8663 evaluation kit (EV kit) is a fully assembled
and tested circuit board that evaluates the MAX8663
power-management IC. The MAX8663 integrates two
synchronous step-down regulators, four low-dropout
linear regulators (LDOs), and a linear charger for a sin-
gle-cell Li-ion (Li+)/Li-polymer battery. Maxim’s Smart
Power Selector™ (SPS) safely distributes power
between an external power source (AC adapter, auto
adapter, or USB source), battery, and the system load.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
Features
♦
Two High-Efficiency 1MHz Synchronous Rectified
Step-Down Regulators
♦
Four LDO Regulators with Jumper-Selectable
Output Voltages
♦
Single-Cell Li+/Li-Polymer Charger
♦
Smart Power Selector (SPS)
♦
Power-OK, Charger Status, and Timeout Fault
Indicators
♦
40-Pin, 5mm x 5mm x 0.8mm Thin QFN Package
♦
Fully Assembled and Tested
Evaluates: MAX8663
Ordering Information
PART
MAX8663EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS compliant.
Component List
DESIGNATION
C1, C4, C6, C10,
C11
QTY
5
DESCRIPTION
10µF ±10%, 16V X5R ceramic
capacitors (0805)
Taiyo Yuden EMK212BJ106KG
0.1µF ±10%, 10V X5R ceramic
capacitor (0402)
Murata GRM155R61A104K
TDK C1005X5R1A104K
Taiyo Yuden LMK105BJ104KV
Not installed, capacitors (0805)
10µF ±10%, 6.3V X5R ceramic
capacitors (0805)
Murata GRM219R60J106K
47µF ±20%, 6.3V X5R ceramic
capacitor (0805)
Taiyo Yuden JMK212BJ476MG
1µF ±10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R61C105K
Taiyo Yuden EMK107 BJ105KA
Not installed, capacitor (0402)
4.7µF ±10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
Taiyo Yuden JMK107BJ475MA
DESIGNATION
C14, C16
QTY
2
DESCRIPTION
1.0µF ±10%, 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J105K
2.2µF ±10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM185R60J225K
Taiyo Yuden JMK107BJ225KA
Not installed, capacitor (1210)
4.7pF ±0.1pF, 50V C0G ceramic
capacitor (0402)
Murata GRM1555C1H4R7B
33pF ±5%, 50V C0G ceramic
capacitor (0402)
Murata GRM1555C1H330J
6800pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H682K
10,000pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H103K
22,000pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H223K
C2
1
C15
C17
C18
1
0
1
C3, C7_2
C5_1, C5_2
0
2
C19
1
C7_1
1
C20
1
C8, C9
C12
C13
2
0
1
C21
1
C22
1
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX8663 Evaluation Kit
Evaluates: MAX8663
Component List (continued)
DESIGNATION
C23
D1, D2
QTY
1
2
DESCRIPTION
68,000pF ±10%, 25V X7R ceramic
capacitor (0603)
Murata GRM188R71E683K
Green LEDs
Agilent HSMG-C150
2-pin headers, 36-pin headers,
0.1in centers (comes in 36-pin
strips, cut to fit)
Sullins PTC36SAAN
Digi-key S1012-36-ND
3-pin headers, 36-pin headers,
0.1in centers (comes in 36-pin
strips, cut to fit)
Sullins PTC36SAAN
Digi-key S1012-36-ND
3.3µH inductor
TOKO DE2818C 1072AS-3R3M,
1.6A, 50mΩ (2.8mm x 3.0mm x
1.8mm)
4.7µH inductor
TOKO DE2818C 1072AS-4R7M,
1.3A, 70mΩ (2.8mm x 3.0mm x
1.8mm)
2.1mm/5.5mm closed-frame power
jack
CUI, Inc. PF-002AH-SMT
USB mini AB receptacle connector
Cypress Industries CCMUSBAB-
32005-700
1.25mm (0.049in) pitch header,
surface-mount, right angle, lead-
free, 10 circuits
Molex 53261-1071
Digi-key WM7628CT-ND
DESIGNATION
PSL1, PSL2
R1, R4
R2
R3
R5
R6, R8
R7
R9
R10
R11
R12
R13
R14, R15
R16, R18
R17
R19, R20
R27
U1
—
QTY
2
2
0
0
1
2
1
1
0
1
1
1
2
0
1
2
0
1
1
DESCRIPTION
1 x 3 pads (0805)
Default PSL1-2, PSL2-2 0Ω resistor
(0805)
2kΩ ±1% resistors (0805)
Not installed, resistor (1206)
Not installed, resistor (0603)
464kΩ ±1% resistor (0402)
200kΩ ±1% resistors (0402)
60.4kΩ ±1% resistor (0402)
1.5kΩ ±1% resistor (0402)
Not installed, resistor (0402)
2.4kΩ ±1% resistor (0805)
3.2kΩ ±1% resistor (0805)
8.0kΩ ±1% resistor (0805)
Bourns 50kΩ 3296 trimming
potentiometers
Not installed, resistors (0805)
10.0kΩ ±1% resistor (0805)
560kΩ ±5% resistors (0805)
Not installed, resistor (1206)
MAX8663ETL+ (40-pin thin QFN,
5mm x 5mm x 0.8mm)
PCB: MAX8663EVKIT+
JU1–JU6
6
JU7–JU19
13
L1
1
L2
1
P1
1
P2
1
P4
1
Component Suppliers
SUPPLIER
Agilent Technologies
CUI, Inc.
Cypress Industries
Molex
Murata
Taiyo Yuden
TDK
TOKO
PHONE
877-424-4536
800-275-4899
866-844-6699
800-786-6539
814-237-1431
847-925-0888
847-803-6100
847-297-0070
www.agilent.com
www.cui.com
www.cypressindustries.com
www.molex.com
www.murata.com
www.yuden.co.jp
www.component.tdk.com
www.toko.com
WEBSITE
Note:
Indicate you are using the MAX8663 when contacting these manufacturers.
2
_______________________________________________________________________________________
MAX8663 Evaluation Kit
Recommended Equipment
• Variable 9V power supply
• One-cell Li+/Li-polymer battery
• 2 voltmeters
• 1 ammeter
• Load resistors or electronic loads capable of 1.2A
8) Verify that JU5 and JU6 shunts are installed to set
the
POK
LED (D1) and the
CHG
LED (D2) on.
9) Place the JU19 shunt across pins 1-2.
10) Preset the power supply to 5V. Turn the power sup-
ply off.
Caution: Do not turn on the power supply
until all connections are completed.
11) Make connections to the EV kit as shown in Figure
1, except do not connect the battery until step 16.
12) Turn on the 5V power supply.
13) Verify that the
POK
LED (D1) turns on to indicate
power-ok.
14) Verify that the voltage across the OUT1 and PGND1
pads is 3.3V.
15) Verify that the voltage across the OUT2 and PGND2
pads is 1.3V.
16) Verify that OUT4, OUT5, OUT6, and OUT7 are at
the voltages set by jumpers JU17 and JU18 (see
Table 3).
17) Verify that the voltage at the BAT pad is 4.2V.
18)
Observe correct Li+/Li-polymer cell polarity.
Connect a single-cell Li+/Li-polymer battery across
the BAT and GND pads.
19) Verify that the
CHG
LED (D2) turns on. The
CHG
LED turns on during prequalification and fast-
charge conditions. The
CHG
LED turns off when the
battery-charging current drops to 7.5% of the fast-
charge current, indicating charging is complete.
Evaluates: MAX8663
Quick Start
Procedures
The MAX8663 EV kit is a fully assembled and tested
surface-mount board. Follow the steps below to verify
board operation:
1) Enable outputs OUT1, OUT2, OUT4, OUT5, OUT6,
and OUT7 by placing shunts across pins 1-2 of JU7,
JU8, JU10, JU11, JU12, and JU13. See Table 1.
Table 2 shows default EV kit output voltages and
maximum currents.
2) Set the OUT4, OUT5, OUT6, and OUT7 output volt-
ages by setting shunts JU17 and JU18 as shown in
Table 3. Note that the JU17 and JU18 jumper set-
tings are read only on power-up. Changes to these
jumpers after power-up are ignored.
3) Place the JU9 shunt across pins 2-3 to allow OUT1
and OUT2 to enter skip mode at light loads.
4) Place the JU14 and JU15 shunts across pins 2-3
and 1-2 to set a 500mA USB input current limit.
5) Place the JU16 shunt across pins 2-3 to enable the
battery charger.
6) Verify that the JU2.1 shunt is installed to set the
charge current limit to 0.972A.
7) Verify that the JU3.4 shunt is installed to set the 5h
fast-charge fault timer limit.
Table 1. Enable Jumper Functions
JUMPER
JU7
POSITION
1-2
Enable
OUT1*
Enable
OUT2*
Enable
OUT4*
Enable
OUT5*
Enable
OUT6*
Enable
OUT7*
2-3
Disable
OUT1
Disable
OUT2
Disable
OUT4
Disable
OUT5
Disable
OUT6
Disable
OUT7
OPEN
Drive EN1 with an external
source.
Drive EN2 with an external
source.
Drive EN4 with an external
source.
Drive EN5 with an external
source.
Drive EN6 with an external
source.
Drive EN7 with an external
source.
+
DC
POWER SUPPLY -
P3
GND
PGND2
-
V
JU8
JU10
JU11
V
A
Li+/Li-POLYMER
BATTERY
BAT
MAX8663
EV KIT
OUT2
OUT1
+
+
GND
PGND1
-
JU12
JU13
Figure 1. Test Procedure Setup (Caution: Do Not Exceed 5.5V
at V
L
)
*Default
position.
_______________________________________________________________________________________
3
MAX8663 Evaluation Kit
Evaluates: MAX8663
Table 2. Default EV Kit Output Voltages
and Maximum Currents
OUTPUT
OUT1
OUT2
OUT4
OUT5
OUT6
OUT7
VOLTAGE
(V)
3.3
1.3
3.3
3.3
3.3
3.3
MAXIMUM CURRENT
(mA)
1200
900
500
150
300
150
Table 3. SL1 and SL2 Output Voltage
Selection
JU17
(SL1)
Open
2-3
1-2
Open
2-3
1-2
Open
2-3
1-2
JU18
(SL2)
Open
Open
Open
2-3
2-3
2-3
1-2
1-2
1-2
OUT4
(V)
3.30
3.30
2.85
3.30
2.50
2.50
1.20
3.30
1.80
OUT5
(V)
3.30
2.85
2.85
2.85
3.30
3.30
1.80
2.85
2.50
OUT6
(V)
3.30
1.85
1.85
2.85
1.50
1.50
1.10
1.50
3.30
OUT7
(V)
3.30
1.85
1.85
1.85
1.50
1.30
1.30
1.50
2.85
Table 4. DC Input Current and Charger Current-Limit Select
CEN
2-3
2-3
2-3
1-2
1-2
1-2
PEN1
2-3
2-3
1-2
X
2-3
1-2
PEN2
2-3
1-2
X
2-3
1-2
1-2
DC INPUT CURRENT LIMIT
95mA
475mA
2000 x (1.5V / R
PSET
)
Off
475mA
2000 x (1.5V / R
PSET
)
EXPECTED INPUT TYPE
100mA USB
500mA USB
AC adapter
USB suspend
500mA USB
AC adapter
CHARGER CURRENT LIMIT
1556 x (1.5V / R
ISET
)
1556 x (1.5V / R
ISET
)
1556 x (1.5V / R
ISET
)
Off
Off
Off
X = Don’t care.
R
ISET
is the resistance between ISET and GND; and R
PSET
is the resistance between PSET and GND.
Detailed Description
Smart Power Selector (SPS)
SPS seamlessly distributes power between the external
input, the battery, and the system load. The basic func-
tions of SPS are:
• With both the external power supply and battery
connected:
a) When the system load requirements exceed the
capacity of the external power input, the battery
supplies supplemental current to the load.
b) When the system load requirements are less
than the capacity of the external power input, the
battery is charged with residual power from the
input.
• When the battery is connected and there is no external
power input, the system is powered from the battery.
• When an external power input is connected and
there is no battery, the system is powered from the
external power input.
DC Input Current-Limit Selection
(PEN1/PEN2)
The input current limit can be set to a variety of values
as shown in Table 4. When the PEN1 input is low, a
USB source is expected at DC and the current limit is
set to either 95mA or 475mA by PEN2. When PEN1 is
high, an AC adapter is expected at DC and the current
limit is set by a programming resistor at PSET. The DC
input current limit is calculated from:
I
DC_LIM
= 2000 x (1.5V / R
PSET
)
An exception is when the battery charger is disabled
(CEN high) with PEN2 low, where the MAX8663 enters
USB suspend mode.
Power-OK Output (
POK
)
The
POK
LED (D1) is a visual indicator of power-OK
status. When the voltage at DC is between the under-
voltage and the overvoltage thresholds, and is greater
than the BAT voltage,
POK
pulls low to indicate that
input power is OK. Otherwise,
POK
is high impedance.
POK
is not affected by PEN1, PEN2, or
CEN
and also
remains active in thermal overload.
4
_______________________________________________________________________________________
MAX8663 Evaluation Kit
Battery Charger
With a valid AC adapter/USB voltage present, the battery
charger initiates a charge cycle when the charger is
enabled. If the battery voltage is less than the BAT pre-
qualification threshold (3V), the charger enters prequalifi-
cation mode, in which the battery charges at 10% of the
maximum set fast-charge current. This slow charge
ensures that the battery is not damaged by fast-charge
current while deeply discharged. Once the battery volt-
age rises to 3.0V, the charger transitions to fast-charge
mode and applies the maximum charge current. As
charging continues, the battery voltage rises until it
reaches the battery regulation voltage (4.2V) where
charge current starts tapering down. When charge cur-
rent decreases to 7.5% of fast-charge current, the charg-
er enters top-off mode. Top-off charging continues for
30min, then all charging stops. If the battery voltage sub-
sequently drops below the 4.1V recharge threshold,
charging restarts and the timers reset.
The charger can be enabled or disabled with
jumper
CEN.
at a 1Hz rate to indicate the fault. Charging can be
resumed by either toggling
CEN
or cycling the DC input
voltage.
The MAX8663 supports values of C
CT
from 0.01µF to 1µF:
C
CT
0.068
μ
F
C
CT
f
FST
−
CHG
=
300 min
×
0.068
μ
F
t
PREQUAL
=
30 min
×
When the charger exits fast-charge mode,
CHG
goes
high impedance and top-off mode is entered. Top-off
time is also determined by C
CT
:
t
TOP
−
OFF
=
30 min
×
C
CT
0.068
μ
F
Evaluates: MAX8663
See Table 6 for the charge-timer setting and jumper
JU3 configurations.
Charge Current
ISET adjusts the MAX8663 charging current to match
the capacity of the battery. A resistor from ISET to
ground (R10, R11, R12, R13, or R14) sets the maximum
fast-charge current, the charge current in prequal, and
the charge-current threshold below which the battery is
considered completely charged. Calculate these
thresholds as follows:
I
CHG-MAX
= 1556 x 1.5V / R
ISET
I
PREQUAL
= 10% x I
CHG-MAX
I
TOP-OFF
= 7.5% x I
CHG-MAX
See Table 5 for the charge-current setting and jumper
JU2 configurations.
Table 6. Charge-Timer Setting
JU3 POSITION
JU3.1 Short
JU3.2 Short
JU3.3 Short
JU3.4 Short
PREQUALIFICATION
CHARGE TIMER
(min)
3.0
4.4
9.7
30.0
FAST-CHARGE
TIMER
(min)
30
44
97
300
Table 5. Charge-Current Setting
JU2 POSITION
JU2.1 Short
JU2.2 Short
JU2.3 Short
JU2.4 Short
CHARGE CURRENT (A)
0.972
0.729
0.292
Adjustable
Charge Status Output (CHG)
The
CHG
LED (D2) indicates charge status. The LED is
on (CHG low) when the charger is in the prequalifica-
tion or fast-charge mode. It is off (CHG high imped-
ance) when the charger is disabled in top-off mode or
in done mode.
The charger enters fault status when the charge timer
expires before the charging completes. In this state, the
CHG
LED pulses at 1Hz to indicate that a fault
occurred.
Battery Charger Thermistor Input (THM)
Battery or ambient temperature can be monitored with
a negative temperature coefficient (NTC) thermistor
connected from the THM pad to GND. Charging is then
allowed when the thermistor temperature is within the
allowable range. The charger enters a temperature sus-
pend state when the thermistor resistance falls below
3.97kΩ (too hot, over +50°C) or rises above 28.7kΩ
5
Charge Timer
The MAX8663 features a fault timer for safe charging. If
prequalification charging or fast charging does not
complete within the time limits programmed by the
timer capacitor at CT (C12, C20, C21, C22, or C23), the
charger stops charging and the
CHG
LED (D2) blinks
_______________________________________________________________________________________
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