MAXIM MAX886ECJ

19-1438; Rev 1; 7/00
NUAL
KIT MA
ATION
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Wireless and Satellite Handset
Power-Management ICs
Features
♦ 90% Efficient, 500mA Step-Down Converter
♦ Two 100mA DAC-Controlled LDOs
One 200mA DAC-Controlled LDO
One 20mA DAC-Controlled LDO
♦ 3- to 6-Cell NiCd or NiMH Operation
1- or 2-Cell Li+ Operation
♦ +2.7V to +12V Input Voltage Range
♦ 250µA Standby (PFM) Quiescent Current
♦ 5µA Shutdown Current
♦ I2C-Compatible Serial Interface
♦ Selectable 375kHz, 535kHz, 670kHz, 925kHz
(or Synchronizable) Switching Frequency
♦ Power-On Reset and Startup Timer
♦ Thermal Overload Protection
♦ Pushbutton On/Off Control
♦ Space-Saving 32-Pin TQFP Package (9mm x 9mm)
Ordering Information
Applications
Satellite Phones
Wireless Handsets
PART
Private Mobile Radio (PMR)
GSM Cellular/PCS Telephones
TEMP. RANGE
PIN-PACKAGE
MAX886ECJ
-40°C to +85°C
32 TQFP
MAX888ECJ
-40°C to +85°C
32 TQFP
MAX1863ECJ
-40°C to +85°C
32 TQFP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
IN
2.7V TO 12V
MAIN POWER (UP TO 500mA)
LX
BATT
PGND
LOW-BATTERY
DETECT
I2C-COMPATIBLE
SERIAL INTERFACE
ON/OFF CONTROL
(OPTIONAL)
LBI
LBO
MAX886
MAX888
MAX1863
OUT0
SCL
OUT1
Tx SECTION POWER (UP TO 100mA)
SDA
OUT2
DSP POWER (UP TO 200mA)
ON
RESET
POWER-ON RESET
OFF
OUT3
3V/5V SIM CARD POWER (UP TO 20mA)
SYNC
OUT4
LCD/VCO/TXCO POWER (UP TO 100mA)
C+
OUT5
Rx SECTION POWER (UP TO 100mA)
C-
ONSTAT
GND
ON STATUS
I2C is a trademark of Philips Corp.
________________________________________________________________ Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX886/MAX888/MAX1863
General Description
The MAX886/MAX888/MAX1863 power-management ICs
are complete power systems for wireless and satellite
handsets. The devices operate from 3- to 6-cell
NiCd/NiMH batteries or from 1- or 2-cell lithium-ion (Li+)
batteries. They incorporate a high-efficiency, step-down
DC-DC converter, a regulated 5V charge pump, and four
linear regulators. The regulators supply power to the
SIM, LCD, BB, DSP, and RF sections of a cellular telephone handset. The step-down converter and linear regulator outputs are adjustable by internal 4-bit DACs,
programmable through the I2C™-compatible serial interface. A pushbutton on/off scheme activates a 5µA lowpower shutdown mode. The devices also feature a
low-battery detector output and an internal startup timer.
The MAX886/MAX888/MAX1863 differ in output voltage
range and power-on reset voltage. The MAX886 has a
higher preset voltage range and is intended for 2-cell Li+
or 5- or 6-cell NiCd/NiMH batteries. The MAX888/
MAX1863 have a lower preset voltage range and are
intended for 1-cell Li+ or 3- or 4-cell NiCd/NiMH batteries. All devices are available in a space-saving, 32-pin
TQFP package.
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
ABSOLUTE MAXIMUM RATINGS
SYNC, RESET, SCL, SDA, CVL, LBI, LBHYS, OUT0
REF, LBO, C+, C-, OUT4, IN2, IN3, IN4, IN5,
ON, OFF to GND ..................................................-0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
32-Pin TQFP (derate 11.1mW/°C above +70°C)..........889mW
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
BATT, IN0, IN1 to GND...........................................-0.3V to +13V
CVH to IN0................................................................-6V to +0.3V
PGND, DGND to GND...........................................-0.3V to +0.3V
ONSTAT to GND .....................................-0.3V to (VOUT2 + 0.3V)
LX to PGND.............................................-0.3V to (VOUT0 + 0.3V)
OUT1 to GND.............................................-0.3V to (VIN1 + 0.3V)
OUT2 to GND.............................................-0.3V to (VIN2 + 0.3V)
OUT3 to GND.............................................-0.3V to (VIN3 + 0.3V)
OUT5 to GND.............................................-0.3V to (VIN5 + 0.3V)
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
(VBATT = VIN0 = VIN1 = +5.5V, GND = PGND = DGND, V OFF = VSYNC = 2.8V, VIN2 = VIN3 = VIN4 = VIN5 = +3.8V, VOUT4 = +5.5V,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
BATT, IN0, IN1 Operating Voltage
Range
VBATT, VIN0,
VIN1
VIN2, VIN3,
VIN4, VIN5
IN2, IN3, IN4, IN5 Operating
Voltage Range
Undervoltage Lockout
Supply Current, PFM Mode
Supply Current, PWM Mode
Supply Current, Shutdown Mode
CONDITIONS
MIN
MAX
UNITS
2.7
12
V
2.7
5.5
V
VUVLOF
VBATT falling
VUVLOR
VBATT rising
2.55
2.65
V
SYNC = GND
250
600
µA
fOSC = 375kHz
2
fOSC = 535kHz
3
fOSC = 670kHz
4
fOSC = 925kHz
5.5
12
5
10
IBATTPFM
IBATTPWM
ISTNBY
OFF = GND
2.35
TYP
TA = 0°C to +85°C
2.45
TA = -40°C to +85°C
V
mA
15
µA
REFERENCE
Reference Output Voltage
VREF
IREF = 0
TA = 0°C to +85°C
1.23
TA = -40°C to +85°C
1.225
Reference Load Regulation
1µA < IREF < 100µA
Reference Supply Rejection
2.7V < VOUT0 < 3.75V
1.25
1.27
1.275
V
5
15
mV
0.2
5
mV
12
V
%
DC-DC BUCK REGULATOR 0 (IN0, OUT0)
Input Voltage Range
VIN0
2.7
Output Accuracy
IOUT0 = 0
-3
3
Nominal Output Adjustment
Range
MAX886
2.625
3.750
MAX888, MAX1863
1.527
3.027
Output Ready Threshold
2
VOUT0
VOUT0 = 3.75V (MAX886),
VOUT0 = 2.027V (MAX888),
VOUT0 = 1.827V (MAX1863)
-7.5
-5
_______________________________________________________________________________________
-3
V
% of
VOUT0
Wireless and Satellite Handset
Power-Management ICs
(VBATT = VIN0 = VIN1 = +5.5V, GND = PGND = DGND, V OFF = VSYNC = 2.8V, VIN2 = VIN3 = VIN4 = VIN5 = +3.8V, VOUT4 = +5.5V,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
Output Load Regulation
IOUT0 = 0.1mA to 500mA
Line Regulation
3V < VIN0 < 12V
-0.3
Maximum Duty Cycle
VLX = 12V
100
LX Leakage Current
VLX = 12V
Internal Switch On-Resistance
RON
PFM to PWM Threshold
Internal Switch Current Limit
TYP
MAX
-1.5
VIN0 = 3.8V
%
0
0.3
%
0.1
10
µA
Ω
%
0.4
1
IOUT0 (MAX886, MAX888)
63
98
180
IOUT0 (MAX1863 only)
130
235
340
0.6
0.9
1.2
ILIMIT
UNITS
mA
A
OSCILLATOR FREQUENCY (OUT0, OUT4)
Oscillator Frequency Accuracy
fOSC
Table 4
TA = 0°C to +85°C
-20
20
TA = -40°C to +85°C
-23
23
0.8 ✕
fOSC
SYNC Range
fOSC
1.2 ✕
fOSC
%
kHz
LDO REGULATOR 1 (IN1, OUT1)
Input Voltage Range
VIN1
Output Accuracy
2.7
12
V
-3
3
%
MAX886
2.70
4.95
MAX888, MAX1863
1.25
3.5
IOUT1 = 0.1mA to 100mA
Nominal Output Adjustment
Range
VOUT1
Dropout Voltage
IOUT1 = 1mA
1
IOUT1 = 100mA
90
Output Load Regulation
IOUT1 = 0.1mA to 100mA
-0.01
Line Regulation
3V < VIN1 < 12V, 0h code
-0.1
0
100
250
Current Limit
200
V
mV
0.01
%/mA
0.1
%/V
mA
LDO REGULATOR 2 (IN2, OUT2)
Input Voltage Range
VIN2
Output Accuracy
IOUT2 = 0.1mA to 200mA
Nominal Output Adjustment
Range
VOUT2
Output Ready Threshold
VRDY2
Dropout Voltage
V
3
%
2.175
3.30
MAX888, MAX1863
1.527
3.027
VOUT2 = 3.3V (MAX886),
VOUT2 = 1.527V (MAX888, MAX1863)
-7.5
-5
IOUT2 = 1mA
1
IOUT2 = 200mA
90
IOUT2 = 0.1mA to 200mA
Line Regulation
2.7V < VIN2 < 3.8V, 0h code
LDO
REGULATOR
3 (IN3, OUT3)
Current
Limit
Output Accuracy
5.5
-3
MAX886
Output Load Regulation
Input Voltage Range
2.7
-0.005
-0.3
200
VIN3
IOUT3 = 0.1mA to 20mA
-3
200
V
% of
VOUT2
mV
0.002
%/mA
0.3
%/V
500
mA
2.7
5.5
V
-3
3
%
_______________________________________________________________________________________
3
MAX886/MAX888/MAX1863
ELECTRICAL CHARACTERISTICS (continued)
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = VIN0 = VIN1 = +5.5V, GND = PGND = DGND, V OFF = VSYNC = 2.8V, VIN2 = VIN3 = VIN4 = VIN5 = +3.8V, VOUT4 = +5.5V,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0
Nominal Output Voltage
VOUT3
2.85
VIN3 = 5.5V,
Table 5
V
4.65
VOUT2
Dropout Voltage
IOUT3 = 1mA
1
IOUT3 = 20mA
20
Output Load Regulation
IOUT3 = 0.1mA to 20mA
Line Regulation
3.8V < VIN3 < 5.5V, VOUT3 = 2.85V
Current Limit
VOUT3 = 2.85V or 4.65V only
50
mV
-0.035
0.02
%/mA
-0.3
0.3
%/V
20
50
mA
CHARGE-PUMP REGULATOR 4 (IN4, OUT4)
Switching Frequency
Output Voltage
fOSC / 2
VOUT4
No load
5.10
IOUT4 = 50mA
5.25
kHz
5.41
5.21
V
LDO REGULATOR 5 (IN5, OUT5)
Input Voltage Range
VIN5
Output Accuracy
Nominal Output Adjustment
Range
2.7
5.5
V
-3
3
%
MAX886
2.175
3.300
MAX888, MAX1863
1.25
3.50
IOUT5 = 0.1mA to 100mA
VOUT5
Dropout Voltage
IOUT5 = 1mA
1
IOUT5 = 100mA
72
200
V
mV
Output Load Regulation
IOUT5 = 0.1mA to 100mA
-0.01
0.01
%/mA
Line Regulation
2.7V < VIN5 < 3.8V, 0h code
-0.3
0.3
%/V
Current Limit
100
250
mA
LOW-BATTERY COMPARATOR
LBI Input Current
VLBI = 1.23V
-0.2
VREF 15mV
LBI Threshold
LBI Propagation Delay
VLBI = step from 1.23V to 1.27V
LBO/LBHYS Output Low Voltage
V LBO = ILBHYS = 1mA,
VLBI = VREF - 15mV
LBO/LBHYS Leakage Current
V LBO = VLBHYS = 12V,
VLBI = VREF + 15mV
VREF
0.2
µA
VREF +
15mV
V
10
-0.2
µs
0.5
V
0.2
µA
RESET AND STARTUP TIMER
Reset Timeout Period
56
75
94
ms
Startup Timeout Period
28
37
47
ms
LOGIC AND CONTROL INPUTS
ON Input Voltage
4
VIL
VIH
0.4
1.2
_______________________________________________________________________________________
V
Wireless and Satellite Handset
Power-Management ICs
(VBATT = VIN0 = VIN1 = +5.5V, GND = PGND = DGND, V OFF = VSYNC = 2.8V, VIN2 = VIN3 = VIN4 = VIN5 = +3.8V, VOUT4 = +5.5V,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
ON Input Current
SYNC Input Voltage
SYNC Input Current
CONDITIONS
MIN
TYP
MAX
IIL
V ON = 0
-16
-40
IIH
1.2V < V ON < VOUT2
-5
-10
VIL
0.8
VIH
ISYNC
2.0
0 < VSYNC < VOUT2
0.25
UNITS
µA
V
1
µA
0.5
V
ONSTAT OUTPUT
ONSTAT Output Voltage
VONSTATL
IONSTAT = 1mA
ONSTAT Output Voltage
VONSTATH
IONSTAT = 0
VOUT2 0.5
V
RESET OUTPUT
Output Low Voltage
V RESETL
I RESET = 1mA
Output High Voltage
V RESETH
I RESET = 0,
internal 10kΩ pullup resistor to OUT2
0.5
VOUT2 0.5
V
V
THERMAL SHUTDOWN
Threshold Temperature
I2C-COMPATIBLE
160
°C
SERIAL INTERFACE
SCL Clock Frequency
fSCL
SCL Low Period
tLOW
SCL High Period
Data Setup Time
Data Hold Time
OFF, SDA, SCL Input Voltage
OFF, SDA, SCL Input Current
SDA Output Low Voltage
LBO, LBHYS Leakage Current
400
kHz
1.3
µs
tHIGH
0.6
µs
tDSU
100
tDHOLD
0
VIL
0.6
VIH
IILH
ns
0.9
1.4
0 < VILH < VOUT2
1
ISDA = 3mA
0.4
ISDA = 6mA
0.6
V LBO = VLBHYST = 12V,
VLBI = VREF + 15mV
-0.2
0.2
µs
V
µA
V
µA
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
_______________________________________________________________________________________
5
MAX886/MAX888/MAX1863
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(Circuit of Figure 2, REG0 to REG5 outputs at POR states, VOUT0 = 3.75V, VOUT4 = 5.25V, VOUT1 = VOUT2 = VOUT3 = VOUT5 = 3.3V,
TA = +25°C, unless otherwise noted.)
EFFICIENCY (%)
EFFICIENCY (%)
80
PWM, 375kHz
70
PWM, 925kHz
80
PWM, 375kHz
70
PWM, 925kHz
60
60
50
50
9
8
BATTERY CURRENT (mA)
PFM, 925kHz
PFM, 375kHz
MAX886/88-03
PFM, 375kHz
90
10
MAX886/88-02
PFM, 925kHz
90
100
MAX886/88-01
100
MAX886
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE
MAX886
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 5.4V)
MAX886
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 8.4V)
PWM, 925kHz
7
6
5
4
3
PWM, 375kHz
2
1
1000
1
MAX888
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 4.2V)
PFM, 375kHz
3
4
5
80
PWM, 925kHz
PWM, 375kHz
6
7
9
10 11 12
MAX888
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE
7
6
PWM, 375kHz
80
PWM, 925kHz
70
5
PWM, 925kHz
4
3
PWM, 375kHz
2
60
60
1
50
50
1
10
100
0
1
1000
10
100
1000
2
3
4
5
6
LOAD CURRENT (mA)
BATTERY VOLTAGE (V)
MAX1863
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 2.7V)
MAX1863
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 3.6V)
MAX1863
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 4.2V)
90
PFM 925kHz
60
PFM 925kHz
EFFICIENCY (%)
PFM 925kHz
70
90
80
80
EFFICIENCY (%)
80
70
60
PWM 925kHz
70
60
PWM 925kHz
50
50
50
40
40
40
30
30
30
10
100
LOAD CURRENT (mA)
1000
MAX886/88-07c
PFM 925kHz
100
MAX886/88-07b
100
MAX886/88-07a
90
1
PFM MODE
LOAD CURRENT (mA)
100
6
8
BATTERY VOLTAGE (V)
PFM, 925kHz
PFM, 375kHz
90
EFFICIENCY (%)
EFFICIENCY (%)
2
1000
100
PFM, 925kHz
70
100
MAX888
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 2.7V)
MAX886/88-04
100
90
10
LOAD CURRENT (mA)
MAX886/88-06
100
LOAD CURRENT (mA)
BATTERY CURRENT (mA)
10
PFM MODE
0
MAX886/88-05
1
EFFICIENCY (%)
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
1
10
100
LOAD CURRENT (mA)
1000
1
10
100
LOAD CURRENT (mA)
_______________________________________________________________________________________
1000
Wireless and Satellite Handset
Power-Management ICs
REG4 OUTPUT VOLTAGE
vs. LOAD CURRENT
DROPOUT VOLTAGE
vs. LOAD CURRENT
REG5
80
60
REG3
40
REG2
5.22
5.20
5.18
5.14
5.12
0
20
40
60
80
LOAD CURRENT (mA)
LOAD CURRENT (mA)
SHUTDOWN CURRENT
vs. BATTERY VOLTAGE
REG1 POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
R1, R2, R3 NOT CONNECTED
8
100
70
MAX886/88-09
10
9
0
20 40 60 80 100 120 140 160 180 200
VOUT1 = 3.3V
IOUT1 = 10mA
COUT1 = 2.2µF
60
MAX886/88-10
0
SHUTDOWN CURRENT (µA)
5.24
5.16
20
50
7
PSRR (dB)
6
5
4
3
40
30
20
2
10
1
0
0
2
3
4
5
6
7
8
9
10 11 12
0.01
0.1
1
10
100
BATTERY VOLTAGE (V)
FREQUENCY (kHz)
REG2 POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
REG0 TURN-ON DELAY
1000
VOUT2 = 3.3V
IOUT2 = 20mA
COUT2 = 2.2µF
60
MAX886/88-11
MAX886/88-12
70
VON
2V/div
50
PSRR (dB)
VIN4 = 3.75V
5.26
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
REG1
100
MAX886/88-08
VIN1 = VIN2 = VIN5 = 3.3V
VIN3 = 2.85V
120
5.28
MAX886/88-07
140
40
30
20
VOUT0
2V/div
10
0
0.01
0.1
1
10
FREQUENCY (kHz)
100
1000
400µs/div
IOUT0 = 20mA
_______________________________________________________________________________________
7
MAX886/MAX888/MAX1863
Typical Operating Characteristics (continued)
(Circuit of Figure 2, REG0 to REG5 outputs at POR states, VOUT0 = 3.75V, VOUT4 = 5.25V, VOUT1 = VOUT2 = VOUT3 = VOUT5 = 3.3V,
TA = +25°C, unless otherwise noted.)
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
Typical Operating Characteristics (continued)
(Circuit of Figure 2, REG0 to REG5 outputs at POR states, VOUT0 = 3.75V, VOUT4 = 5.25V, VOUT1 = VOUT2 = VOUT3 = VOUT5 = 3.3V,
TA = +25°C, unless otherwise noted.)
REG0 LINE-TRANSIENT RESPONSE
(PFM MODE)
REG0 LINE-TRANSIENT RESPONSE
(PWM MODE)
MAX886/88-14
MAX886/88-13
VBATT
500mV/div
VBATT
500mV/div
VOUT0
100mV/div
VOUT0
100mV/div
400µs/div
VBATT = 7V TO 8V, IOUT0 = 5mA,
VOUT0 = 3.75V, AC-COUPLED
400µs/div
VBATT = 7V TO 8V, IOUT0 = 500mA,
VOUT0 = 3.75V, AC-COUPLED
REG2 LINE-TRANSIENT RESPONSE
(IN2 CONNECTED TO OUT0)
REG0 LOAD-TRANSIENT RESPONSE
(PWM MODE)
MAX886/88-15
MAX886/88-16
VBATT
500mV/div
IOUT0
200mA/div
VOUT2
100mV/div
VOUT0
100mV/div
400µs/div
VBATT = 7V TO 8V, IOUT2 = 5mA,
VOUT2 = 3.3V, AC-COUPLED
400µs/div
VBATT = 5.4V, IOUT0 = 0 TO 500mA,
VOUT0 = 3.75V, AC-COUPLED
REG0 LOAD-TRANSIENT RESPONSE
(PFM MODE)
REG2 LOAD-TRANSIENT RESPONSE
(IN2 CONNECTED TO BATT)
MAX886/88-17
IOUT0
200mA/div
IOUT2
200mA/div
VOUT0
100mV/div
VOUT2
100mV/div
400µs/div
VBATT = 5.4V, IOUT0 = 0 TO 500mA,
VOUT0 = 3.75V, AC-COUPLED
8
MAX886/88-18
400µs/div
VBATT = VIN2 = 5.4V, IOUT2 = 0 TO 200mA,
VOUT2 = 3.3V, AC-COUPLED
_______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
PIN
NAME
FUNCTION
1
LX
2
PGND
Power Ground
3
OUT0
Switching Regulator 0 Output. Bypass with a 10µF, low-ESR capacitor to PGND. Up to 500mA is available
from OUT0.
4
CVL
Low-Side Drive Bypass. Bypass with a 1µF capacitor to GND.
5
REF
Reference Output. Bypass with a 0.22µF capacitor to GND. REF can source up to 100µA.
6
GND
Ground
7
BATT
Supply Voltage Input. Bypass with a 0.1µF and a 10µF capacitor to PGND as close to BATT as possible.
8
OUT4
Charge-Pump Regulator 4 Output. Bypass with a 10µF, low-ESR capacitor to DGND.
9
C+
Charge-Pump Capacitor Positive Connection
10
IN4
Regulator 4 Power-Supply Input
11
C-
Charge-Pump Capacitor Negative Connection
12
DGND
13
LBI
14
LBHYS
15
LBO
16
RESET
17
IN2
18
OUT2
Linear Regulator 2 Output. Bypass with a 2.2µF, low-ESR capacitor to GND. Up to 200mA is available from
OUT2. The reset circuit monitors this voltage.
19
OUT3
Linear Regulator 3 Output. Bypass with a 1µF, low-ESR capacitor to GND. Up to 20mA is available from
OUT3.
20
IN3
Regulator 3 Power-Supply Input
21
IN5
Regulator 5 Power-Supply Input
22
OUT5
23
IN1
Inductor Input. Drain of the internal P-channel MOSFET.
Digital Ground
Low-Battery Detector Input. LBO goes low when VLBI drops below VREF. Connect LBI to the center of a
resistor voltage-divider between BATT and GND.
Low-Battery Detector Hysteresis Control. An open-drain output to set the hysteresis of the low-battery
detector comparator.
Low-Battery Output. Open-drain output of the low-battery detector comparator. LBO is high impedance
when device is shutdown or VLBI > VREF. V LBO is low when VLBI < VREF. Typically, connect a 200kΩ pullup
resistor between LBO and OUT2.
Reset Output. RESET remains low during initial power-up for 75ms after OUT2 is ready. RESET has an
internal 10kΩ pullup resistor connected to OUT2. RESET is valid for VBATT down to 1V.
Linear Regulator 2 Power-Supply Input
Linear Regulator 5 Output. Bypass with a 1µF, low-ESR capacitor to GND. Up to 100mA is available from
OUT5.
Regulator 1 Power-Supply Input
_______________________________________________________________________________________
9
MAX886/MAX888/MAX1863
Pin Description
Wireless and Satellite Handset
Power-Management ICs
MAX886/MAX888/MAX1863
Pin Description (continued)
PIN
NAME
FUNCTION
24
OUT1
Linear Regulator 1 Output. Bypass with a 2.2µF, low-ESR capacitor to GND. Up to 100mA is available from
OUT1.
25
OFF
Power-Off Input. Drive OFF high before the startup timer has expired in order to keep the IC powered on.
Drive OFF low to shut down the IC. OFF has an internal 100kΩ pulldown resistor to GND.
26
ON
Power-On Input. Pulse the ON pin low to turn on the IC. ON has an internal 16µA pullup resistor.
27
ONSTAT
28
SDA
Serial Interface Data Input
29
SCL
Serial Interface Clock Input
30
SYNC
31
CVH
High-Side Drive Bypass Input. Bypass CVH with a 0.1µF capacitor connected to IN0.
32
IN0
Regulator 0 Power-Supply Input. Connect to BATT. Source of the internal P-channel MOSFET.
A
ON Status Output. Push-pull logic output indicating the state of the ON input. The logic state of this pin
follows the logic state of the ON pin. The logic high output voltage is the output voltage of OUT2.
Sync Input. Drive SYNC with a logic-level square wave to synchronize the internal oscillator. The capture
range for external clock is ±20% of the selected internal oscillator frequency. Drive SYNC low for more
than 10µs to force low-power PFM mode (standby mode). Drive SYNC high to force PWM mode.
tLOW
B
tHIGH
C
D
E
F
G
H
I
J
K
L
M
SCL
SDA
tSU:STA
tHD:STA
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
tSU:DAT
tHD:DAT
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE (OP/SUS BIT)
H = LSB OF DATA CLOCKED INTO SLAVE
I = SLAVE PULLS SMBDATA LINE LOW
tSU:STO tBUF
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
Figure 1. I2C-Compatible Serial-Interface Timing Diagram
10
______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
MAX886/MAX888/MAX1863
L1
10µH
IN
4V TO 12V
OUT0
UP TO 500mA
LX
BATT
C2
0.1µF
C1
10µF
C11
10µF
D1
MBR0520L
PGND
IN0
IN1
R1
1.1MΩ
OUT0
C4
0.1µF
CVH
IN2
LBI
IN4
R2
562k
MAX886
IN5
LBHYS
OUT1
UP TO 100mA
OUT1
R3
23.3k
C7
2.2µF
GND
OUT2
UP TO 200mA
OUT2
C8
2.2µF
R5
200k
REF
C5
0.22µF
LBO
CVL
RESET
C+
OUT3
C3
1µF
C9
1µF
C6
0.22µF
OUT3
UP TO 20mA
COUT4
5.25V UP TO 100mA
OUT4
C12
10µF
SCL
IN3
SDA
OUT5
UP TO 100mA
OUT5
ON
C10
1µF
OFF
ONSTAT
SYNC
DGND
Figure 2a. Typical 2 Li+ or 5 to 6 Ni-Cell Application Circuit (MAX886)
______________________________________________________________________________________
11
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
L1
10µH
IN
2.7V TO 5.5V
C2
0.1µF
C1
10µF
OUT0
UP TO 500mA
LX
BATT
C11
10µF
D1
MBR0520L
PGND
IN0
IN1
R1
619k
OUT0
C4
0.1µF
CVH
IN2
LBI
IN4
R2
562k
LBHYS
MAX888
MAX1863
IN5
OUT1
R3
47.6k
C7
2.2µF
GND
OUT1
UP TO 100mA
OUT2
UP TO 200mA
OUT2
C8
2.2µF
R5
200k
REF
C5
0.22µF
LBO
CVL
RESET
C+
OUT3
C3
1µF
C9
1µF
C6
0.22µF
OUT3
UP TO 20mA
C-
OUT4
5.25V UP TO 100mA
OUT4
C12
10µF
SCL
IN3
SDA
OUT5
ON
C10
1µF
OUT5
UP TO 100mA
OFF
ONSTAT
SYNC
DGND
Figure 2b. Typical 1 Li+ or 3 to 4 Ni-Cell Application Circuit (MAX888/MAX1863)
12
______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
The MAX886/MAX888/MAX1863 contain one high-efficiency, step-down DC-DC converter, four low-dropout
linear regulators, and one regulated charge pump. The
output voltages of the switching regulator and the linear
regulators are software-programmable through the serial interface. The regulated charge-pump output is factory set at 5.25V. The devices also include reset and
startup timers and a low-battery detect comparator
(Figure 3).
500mA DC-DC Buck Regulator 0
Regulator 0 is a low-noise, step-down, synchronous
DC-DC converter that can source a minimum of
500mA. High operating frequency (up to 925kHz) minimizes output voltage ripple and reduces the size and
cost of external components. Guaranteed 100% dutycycle operation provides the lowest possible dropout
voltage, extending the useful life of the battery supply.
The serial interface programs VOUT0 from 2.625V to
3.75V in 75mV steps for the MAX886 (Tables 1 and 2),
5
ON1
SDA
SCL
DAC1
LOGIC
DECODER
ON2
DAC2
ON2
DAC3
DAC5
ON5
LINEAR
REG1
IN1
OUT1
LINEAR
REG2
IN2
OUT2
LINEAR
REG3
IN3
OUT3
LINEAR
REG5
IN5
OUT5
CVH
CVL
IN0
BATT
LX
DAC0
ON0
SYNC
OUT2
+
PGND
IN4
OSCILLATOR
10k
ON4
RESET
ON
OFF
OUT0
SWITCHING
REGULATOR
RESET AND
STARTUP
TIMER
REG4
CHARGE
PUMP
REGULATOR
OUT4
C+
C-
ONSTAT
LBI
LBO
REF
REF
LBHYS
DGND
GND
Figure 3. MAX886/MAX888/MAX1863 Functional Diagram
______________________________________________________________________________________
13
MAX886/MAX888/MAX1863
Detailed Description
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
or from 1.527V to 3.027V in 100mV steps for the
MAX888/MAX1863 (Tables 1 and 3).
Regulator 0 operates in one of four preset frequencies,
from 375kHz to 925kHz, programmable through the
serial interface (Table 4).
For the device to power up properly, VIN0 must be high
enough for REG0 to get into regulation. For the MAX886,
Regulator 0’s default voltage is 3.75V. Since the rest of
the regulators do not power up until Regulator 0 is
ready, VIN0 must be greater than approximately 4V for
the device to power up properly. The Regulator 0 default
voltage for the MAX888 is 2.027V, and 1.827V for the
MAX1863, so the minimum VIN0 required to start up is
limited by the minimum operating voltage range (2.7V).
After power-up, the device operates until VBATT drops
below V UVLOF (undervoltage lockout falling threshold).
Sync Mode
The SYNC input allows the MAX886/MAX888/MAX1863
to synchronize with an external clock applied to SYNC,
ensuring that switching harmonics are kept away from
sensitive IF bands. The SYNC detector triggers on
SYNC’s falling edge.
PWM Mode
Regulator 0 is in PWM mode when SYNC is connected to
CVL or driven to a logic-high voltage. Two internal switches operate at a preset frequency even when there is no
load. The P-channel MOSFET turns on to charge the
inductor until the error comparator or current-limit comparator turns it off. The N-channel MOSFET then turns on
to discharge the inductor. To prevent the output from
soaring with no load in PWM mode, the N-channel switch
stays on long enough to allow the inductor current to go
negative. Once the N-channel switch turns off, the voltage
at LX rises (rings) until the next cycle when the P-channel
switch turns on again. As the load increases and the
inductor enters continuous conduction, ringing is no
longer present and the LX waveform looks like a square
wave whose duty cycle depends on the input and output
voltages. As the input voltage approaches the same level
as the output voltage, the P-channel switch stays on
100% of the time, providing the lowest possible dropout.
PFM Mode
Regulator 0 operates in PFM mode when SYNC is driven to a logic low voltage or connected to GND. When
V OUT0 drops below the regulation threshold, the Pchannel switch turns on to charge the inductor until the
error comparator or current-limit comparator turns it off.
At light loads, the N-channel then turns on to discharge
the inductor until the current in the inductor reaches
zero. In PFM mode, the inductor current does not go
negative to discharge the output. At no-load there is a
14
long period between pulses of inductor current. As the
load current increases, the period between pulses
becomes shorter until the pulses become continuous. At
load currents above this point, Regulator 0 automatically
switches to PWM mode, and the VLX waveform looks like
a square wave whose duty cycle depends on the input
and output voltages. As the input voltage approaches
the same level as the output voltage, the P-channel
switch stays on 100% of the time, providing the lowest
possible dropout. It is typically more efficient to use the
PFM mode when the load current is less than 100mA.
100mA LDO Regulator 1
Regulator 1, a low-dropout linear regulator, sources a
minimum of 100mA and operates from voltages up to
12V at IN1. The serial interface programs VOUT1 from
2.7V to 4.95V in 75mV steps for the MAX886 (Tables 1
and 2), or from 1.25V to 3.50V in 150mV steps for the
MAX888/MAX1863 (Tables 1 and 3). IN1 may be powered from the battery, OUT0, or any other voltage
source.
200mA LDO Regulator 2
Regulator 2, a low-dropout linear regulator, sources a
minimum of 200mA. The serial interface programs VOUT2
from 2.175V to 3.3V in 75mV steps for the MAX886 (Tables
1 and 2), or from 1.527V to 3.027V in 100mV steps for the
MAX888/MAX1863 (Tables 1 and 3). IN2 may be powered from the battery, OUT0, or any other voltage source
less than 5.5V.
20mA LDO Regulator 3
Regulator 3, a low-dropout linear regulator, sources a
minimum of 20mA. The serial interface programs VOUT3
to one of four different output voltages: 0V, 2.85V, 4.65V,
or VOUT2 (Tables 1 and 5). Although this is a generalpurpose output, OUT3 is intended for the SIM supply. IN3
may be powered from OUT4 or from any regulated 5V
supply.
When programmed to 0V or VOUT2, OUT3 is either actively
discharged to GND (for 0V mode) or connected to OUT2
(for VOUT2), and Regulator 3 is disabled to conserve
power.
100mA Charge-Pump Regulator 4
Regulator 4, a regulated charge pump, generates 5.25V
and delivers up to 100mA. An oscillator synchronized to the
PWM clock regulates OUT4 to minimize noise. It operates
at one-half the frequency of the PWM oscillator to ensure
50% duty-cycle outputs. IN4 may be powered from the battery, OUT0, or any other voltage source less than 5.5V.
To save space and cost, use a small ceramic flying
capacitor. See Table 6 for recommended flying capacitor values.
______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
Control Data Byte
The control byte is 8 bits long (4 address bits, 4 data
bits). Each regulator has a DAC that sets the output
regulation voltage. Control codes are summarized in
Table 1.
Table 1. Control Data Byte
ADDRESS
FUNCTION
DATA
A3
MSB
A2
A1
A0
OUT0 Output Voltage
0
0
0
0
DAC0
OUT1 Output Voltage
0
0
0
1
DAC1
OUT2 Output Voltage
0
0
1
0
DAC2
OUT3 Output Voltage, fOSC
0
0
1
1
OUT5 Output Voltage
0
1
0
0
OUT1, 2, 4, 5 On/Off Control
0
1
0
1
ON5
ON4
ON2
ON1
OUT0 On/Off Control
0
1
1
0
X
X
X
ON0
Not available
0
1
1
1
X
X
X
X
Not available
1
X
X
X
X
X
X
X
D3
D2
D0
LSB
D1
DAC3
fOSC
DAC5
Table 2. MAX886 Output Voltage Settings
REGULATOR OUTPUT VOLTAGE (V)
DACX DATA
OUT5
OUT2
OUT1
OUT0
D3
D2
D1
D0
2.175
2.175
2.70
2.625
0
0
0
0
2.250
2.250
2.85
2.700
0
0
0
1
2.325
2.325
3.00
2.775
0
0
1
0
2.400
2.400
3.15
2.850
0
0
1
1
2.475
2.475
3.30
2.925
0
1
0
0
2.550
2.550
3.45
3.000
0
1
0
1
2.625
2.625
3.60
3.075
0
1
1
0
2.700
2.700
3.75
3.150
0
1
1
1
2.775
2.775
3.90
3.225
1
0
0
0
2.850
2.850
4.05
3.300
1
0
0
1
2.925
2.925
4.20
3.375
1
0
1
0
3.000
3.000
4.35
3.450
1
0
1
1
3.075
3.075
4.50
3.525
1
1
0
0
3.150
3.150
4.65
3.600
1
1
0
1
3.225
3.225
4.80
3.675
1
1
1
0
3.300
3.300
4.95
3.750
1
1
1
1
Note: The output voltage of each regulator can be set independently. The POR states are in boldface.
______________________________________________________________________________________
15
MAX886/MAX888/MAX1863
100mA LDO Regulator 5
Regulator 5, a low-dropout linear regulator, can source a
minimum of 100mA. The output voltage is programmable
from 2.175V to 3.3V in 75mV steps for the MAX886
(Tables 1 and 2), or 1.25V to 3.50V in 150mV steps for the
MAX888/MAX1863 (Tables 1 and 3). IN5 may be powered from the battery, OUT0, or any other voltage source
less than 5.5V.
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
Table 3. MAX888/MAX1863 Output Voltage Settings
REGULATOR OUTPUT VOLTAGE (V)
DACX DATA
OUT5
OUT2
OUT1
OUT0
D3
D2
D1
D0
1.25
1.527
1.25
1.527
0
0
0
0
1.40
1.627
1.40
1.627
0
0
0
1
1.55*
1.727
1.55*
1.727
0
0
1
0
1.70
1.827
1.70
1.827**
0
0
1
1
1.85
1.927
1.85
1.927
0
1
0
0
2.00
2.027
2.00
2.027*
0
1
0
1
2.15
2.127
2.15
2.127
0
1
1
0
2.30
2.227
2.30
2.227
0
1
1
1
2.45
2.327
2.45
2.327
1
0
0
0
2.60
2.427
2.60
2.427
1
0
0
1
2.75
2.527
2.75
2.527
1
0
1
0
2.90
2.627
2.90**
2.627
1
0
1
1
3.05**
2.727
3.05
2.727
1
1
0
0
3.20
2.827*
3.20
2.827
1
1
0
1
3.35
2.927**
3.35
2.927
1
1
1
0
3.50
3.027
3.50
3.027
1
1
1
1
Note: The output voltage of each regulator can be set independently. The POR states are in boldface.
*MAX888
**MAX1863
Low-Battery Detector
Table 4. Oscillator Frequency Setting
ADDRESS 03h DATA
fOSC (kHz)
D3
D2
D1
D0
375
X
X
0
0
535
X
X
0
1
670
X
X
1
0
925
X
X
1
1
Note: The POR states are in boldface.
Table 5. OUT3 Output Voltage Setting
ADDRESS 03h
DATA
D3
D2
D1
D0
0V (REG3 Off)**
0
0
X
X
2.85V
0
1
X
X
4.65V
1
0
X
X
VOUT2 (REG3 Off)*
1
1
X
X
A low-battery comparator detects low-battery conditions. The trip threshold is internally set to VREF (1.25V
typ). LBHYS sets the hysteresis with external resistors.
LBO and LBHYS have open-drain outputs. The externally set low-battery threshold must be higher than the
UVLOF threshold (2.45V typical).
Set the threshold and hysteresis by connecting resistors R1 (between BATT and LBI), R2 (between LBI and
LBHYS), and R3 (LBHYS and GND) (Figure 2).
After choosing the upper and lower thresholds, calculate the resistor values as follows:
1) Choose a value for R1. Typical values range from
500kΩ to 1.5MΩ.
2) Calculate R2:
R2 =
3) Calculate R3:
Note: The POR states are in boldface.
*MAX888
**MAX1863
16
R1
 VTHR 
V
– 1
 REF 
R3 =
(
)
R2 VTHF − VREF − R1 × VREF
VREF − VTHF
______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
VTHR = rising threshold = VTHF + VHYS = 2.62V
R1 = 619kΩ (1%)
R2 = 562kΩ (1%)
R3 = 47.6kΩ (1%)
Power-On Sequence
(Including RESET and Startup Timers)
Drive ON low to begin the power-up sequence. To reduce
overall system cost and complexity, the MAX886/MAX888/
MAX1863 incorporate RESET and startup timers with the
power-on sequence.
The MAX886/MAX888/MAX1863 turn on the reference
when ON goes low. Once the reference is fully powered up, if the input voltage exceeds the internal undervoltage-lockout threshold (UVLOR), Regulator 0 turns
on. Once OUT0 is in regulation, OUT2 and OUT4 turn
on. Once OUT2 is in regulation, OUT1 and OUT5 turn
on and the 75ms reset timer begins. RESET remains
low from the time OUT2 is valid until the reset timer
times out. After the reset period expires, a 50ms startup
timer begins. The MAX886/MAX888/MAX1863 shut
down if the external logic or controller fails to drive OFF
high before the startup timer expires. Drive OFF high to
continue operation. Driving OFF low turns off the IC.
There is no required sequence to power off any regulator after the device has turned on. Regulators can be
powered off selectively by sending the correct code
through the serial interface (Table 1).
MAX886
MAX888
MAX1863
OUT2
10k
ONSTAT
OFF
Thermal Overload Protection
An internal thermal sensor shuts the MAX886/MAX888/
MAX1863 down when the maximum temperature limit is
exceeded (160°C typical).
I2C-Compatible Serial Interface
2
Use an I C-compatible serial interface to turn the
MAX886/MAX888/MAX1863 on and off, as well as control each regulator’s output voltage and program the
DC-DC converter and charge pump’s oscillator frequency. Use standard I2C-compatible receive-byte commands to program the IC. This part is always a slave to
the bus master. The chip address is 1001 111.
POR State
The power-on reset state of all the DAC and frequency
registers is 0Fh, except for DAC1 which is 04h. The
power-on reset state of the ONX bits is 1 (Table 1). The
power-on voltage for each regulator is shown in bold in
Tables 2, 3, and 5.
Applications Information
Inductor Selection
The essential parameters for inductor selection are
inductance and current rating. The MAX886/MAX888/
MAX1863 operate with a wide range of inductance values. In many applications, values between 10µH and
68µH take best advantage of the controller’s high switching frequency.
Calculate the minimum inductance value using the simplified equation:
L(MIN) =
RESET
ON
ONSTAT is a logic output that follows ON. Connect
ONSTAT to the external logic or controller to sense
when the ON pin has been brought low to request shutdown. This allows easy implementation of a one-button
on/off control scheme (Figure 4).
µC
4 VBATT(MAX ) − VOUT0 
IPEAK × fOSC × VBATT / VOUT0
(
)
where IPEAK is the peak inductor current (0.9A) and
fOSC is the switching frequency.
For example, for a 6V battery voltage, a desired VOUT0
is 3.3V, the oscillator frequency is 375kHz, and 15µH is
the minimum inductance required.
Diode Selection
Figure 4. One-Button On/Off Control with ONSTAT
The MAX886/MAX888/MAX1863s’ high switching frequency demands a high-speed rectifier. Schottky
diodes, such as the 1N5817–1N5822 family or surfacemount MBR0520L series, are recommended. Ultra-
______________________________________________________________________________________
17
MAX886/MAX888/MAX1863
ONSTAT Output
For example:
VREF = 1.25V
VTHF = falling threshold = 2.52V
VHYS = hysteresis = 0.1V
MAX886/MAX888/MAX1863
Wireless and Satellite Handset
Power-Management ICs
high-speed rectifiers with reverse recovery times
around 50ns or faster, such as the MUR series, are
acceptable. Ensure that the diode’s peak current rating
exceeds the peak current (1A), and that its breakdown
voltage exceeds VBATT. Schottky diodes are preferred
for heavy loads due to their low forward voltage, especially in low-voltage applications.
Capacitor Selection
Choose filter capacitors to service input and output
peak currents with acceptable voltage ripple. The
capacitor’s equivalent series resistance (ESR) is a
major contributor to ripple; therefore, low-ESR capacitors are recommended for OUT1–OUT5. A tantalum
capacitor is recommended for OUT0 (see Figures 2a
and 2b, and Table 6).
The input filter capacitor reduces peak currents drawn
from the power source, and reduces noise and voltage
ripple on the input, which are caused by the circuit’s
switching action. Since the current from the battery is
interrupted each time the PMOS switch opens, pay special attention to the ripple current rating of the input filter
capacitor and use a low-ESR capacitor. Choose input
capacitors with working voltage ratings higher than the
maximum input voltage. Input capacitors prevent spikes
and ringing on the power source from obscuring the
current-feedback signal and causing jitter.
Bypass REF with 0.22µF to GND. The capacitor should
be placed within 0.2 inches of the IC, next to REF, with
a direct trace to GND.
Table 6. OUT0 and OUT4 Regulator
Component Recommendations
18
Table 7. Component Suppliers
PHONE
FAX
AVX
COMPANY
803-946-0690
803-626-3123
Coilcraft
847-639-6400
847-639-1469
Coiltronics
516-241-7876
516-241-9339
Dale
605-668-4131
605-665-1627
Internal Rectifier
310-322-3331
310-322-3332
Motorola
602-303-5454
602-994-6430
Sanyo
619-661-6835
619-661-1055
Sprague
408-988-8000
408-970-3950
Sumida
847-956-0666
847-956-0702
Layout Considerations
High-frequency switching regulators are sensitive to PC
board layout. Poor layout introduces switching noise
into the current and voltage-feedback signals, resulting
in jitter, instability, or degraded performance. Place the
anode of the Schottky diode and the ground pins of the
input and output capacitors close together, and route
them to a common “star-ground” point. Place components and route ground paths so as to prevent high
currents from causing large voltage gradients between
the ground pin of the output filter capacitor, the controller IC, and the reference bypass capacitor. Keep
the extra copper on the component and solder sides of
the PC board rather than etching it away, and connect
it to ground for use as a pseudoground plane. Refer to
the MAX886/MAX888 evaluation kit for a two-layer PC
board layout example.
Component Suppliers
fOSC
(kHz)
C11
(µF)
L1
(µH)
C6
(µF)
C12
(µF)
925
10
10
0.22
10
670
15
15
0.33
15
535
22
22
0.47
22
375
33
33
1
33
Table 7 lists component suppliers.
______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
IN0
CVH
SYNC
SCL
SDA
ONSTAT
ON
OFF
32
31
30
29
28
27
26
25
TOP VIEW
LX
1
24 OUT1
PGND
2
23 IN1
OUT0
3
22 OUT5
CVL
4
21 IN5
MAX886
MAX888
MAX1863
20 IN3
REF
5
GND
6
BATT
7
18 OUT2
OUT4
8
17 IN2
9
10
11
12
13
14
15
16
C+
IN4
C-
DGND
LBI
LBHYS
LBO
RESET
19 OUT3
Chip Information
TRANSISTOR COUNT: 2042
______________________________________________________________________________________
19
MAX886/MAX888/MAX1863
Pin Configuration
Wireless and Satellite Handset
Power-Management ICs
32L/48L,TQFP.EPS
MAX886/MAX888MAX1863
Package Information
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.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.