19-1438; Rev 0; 3/99
L
MANUA
ION KIT HEET
AT
EVALU
DATA S
LOWS
FOL
Wireless and Satellite Handset
Power-Management ICs
Features
o
90% Efficient, 500mA Step-Down Converter
o
Two 100mA DAC-Controlled LDOs
One 200mA DAC-Controlled LDO
One 20mA DAC-Controlled LDO
o
3 to 6-Cell NiCd or NiMH Operation
1 or 2-Cell Li-Ion Operation
o
+2.7V to +12V Input Voltage Range
o
250µA Standby (PFM) Quiescent Current
o
5µA Shutdown Current
o
I
2
C-Compatible Serial Interface
o
Selectable 375kHz, 535kHz, 670kHz, 925kHz
(or Synchronizable) Switching Frequency
o
Power-On Reset and Start-Up Timer
o
Thermal Overload Protection
o
Pushbutton On/Off Control
o
Space-Saving 32-Pin TQFP Package (7mm x 7mm)
General Description
The MAX886/MAX888 power-management ICs are com-
plete power systems for wireless and satellite handsets.
The devices operate from 3 to 6-cell NiCd/NiMH batter-
ies or from 1 or 2-cell Li-Ion batteries. They incorporate a
high-efficiency, step-down DC-DC converter, a regulated
5V charge pump, and four linear regulators. The regula-
tors 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 I
2
C™-
compatible serial interface. A pushbutton on/off scheme
activates a 5µA low-power shutdown mode. The devices
also feature a low-battery detector output and an internal
start-up timer.
The MAX886/MAX888 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-Ion or 5/6-cell
NiCd/NiMH batteries. The MAX888 has a lower preset
voltage range and is intended for 1-cell Li-Ion or 3/4-cell
NiCd/NiMH batteries. Both devices are available in a
space-saving, 32-pin TQFP package.
MAX886/MAX888
Applications
Satellite Phones
Wireless Handsets
Private Mobile Radio (PMR)
GSM Cellular/PCS Telephones
PART
MAX886ECJ*
MAX888ECJ
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 TQFP
32 TQFP
Pin Configuration appears at end of data sheet.
*
Future product—contact factory for availability.
Typical Operating Circuit
IN
2.7V TO 12V
BATT
LX
PGND
LOW-BATTERY
DETECT
I
2
C-COMPATIBLE
SERIAL INTERFACE
ON/OFF CONTROL
(OPTIONAL)
LBI
LBO
SCL
SDA
ON
OFF
SYNC
C+
C-
GND
OUT1
OUT2
RESET
OUT3
OUT4
OUT5
ONSTAT
Tx SECTION POWER (UP TO 100mA)
DSP POWER (UP TO 200mA)
POWER-ON RESET
3V/5V SIM CARD POWER (UP TO 20mA)
LCD/VCO/TXCO POWER (UP TO 100mA)
Rx SECTION POWER (UP TO 100mA)
ON STATUS
MAIN POWER (UP TO 500mA)
MAX886
MAX888
OUT0
I
2
C is a trademark of Philips Corp.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Wireless and Satellite Handset
Power-Management ICs
MAX886/MAX888
ABSOLUTE MAXIMUM RATINGS
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 (V
OUT2
+ 0.3V)
LX to PGND.............................................-0.3V to (V
OUT0
+ 0.3V)
OUT1 to GND.............................................-0.3V to (V
IN1
+ 0.3V)
OUT2 to GND.............................................-0.3V to (V
IN2
+ 0.3V)
OUT3 to GND.............................................-0.3V to (V
IN3
+ 0.3V)
OUT5 to GND.............................................-0.3V to (V
IN5
+ 0.3V)
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 (T
A
= +70°C)
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, 10sec) .............................+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
(V
BATT
= V
IN0
= V
IN1
= +5.5V, GND = PGND = DGND, V
OFF
= V
SYNC
= 2.8V, V
IN2
= V
IN3
= V
IN4
= V
IN5
= +3.8V, V
OUT4
= +5.5V,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
BATT, IN0, IN1 Operating Voltage
Range
IN2, IN3, IN4, IN5 Operating
Voltage Range
Undervoltage Lockout
Supply Current, PFM Mode
SYMBOL
V
BATT
, V
IN0
,
V
IN1
V
IN2
, V
IN3
,
V
IN4
, V
IN5
V
UVLOF
V
UVLOR
I
BATTPFM
V
BATT
falling
V
BATT
rising
SYNC = GND
f
OSC
= 375kHz
Supply Current, PWM Mode
I
BATTPWM
f
OSC
= 535kHz
f
OSC
= 670kHz
f
OSC
= 925kHz
Supply Current, Shutdown Mode
REFERENCE
Reference Output Voltage
Reference Load Regulation
Reference Supply Rejection
DC-DC BUCK REGULATOR 0 (IN0, OUT0)
Input Voltage Range
Output Accuracy
Nominal Output Adjustment
Range
Output Ready Threshold
V
OUT0
V
IN0
I
OUT0
= 0
MAX886
MAX888
V
OUT0
= 3.75V (MAX886),
V
OUT0
= 2.027V (MAX888)
2.7
-3
2.625
1.527
-7.5
-5
12
3
3.750
3.027
-3
V
%
V
% of
V
OUT0
V
REF
I
REF
= 0
1µA < I
REF
< 100µA
2.7V < V
OUT0
< 3.75V
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
1.23
1.225
5
0.2
1.25
1.27
1.275
15
5
V
mV
mV
I
STNBY
OFF
= GND
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
CONDITIONS
MIN
2.7
2.7
2.35
2.45
2.55
250
2
3
4
5.5
5
12
10
15
µA
mA
2.65
600
TYP
MAX
12
5.5
UNITS
V
V
V
V
µA
2
_______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= V
IN0
= V
IN1
= +5.5V, GND = PGND = DGND, V
OFF
= V
SYNC
= 2.8V, V
IN2
= V
IN3
= V
IN4
= V
IN5
= +3.8V, V
OUT4
= +5.5V,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Load Regulation
Line Regulation
Maximum Duty Cycle
LX Leakage Current
Internal Switch On-Resistance
PFM to PWM Threshold
Internal Switch Current Limit
I
LIMIT
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
OSCILLATOR FREQUENCY (OUT0, OUT4)
Oscillator Frequency Accuracy
SYNC Range
LDO REGULATOR 1 (IN1, OUT1)
Input Voltage Range
Output Accuracy
Nominal Output Adjustment
Range
Dropout Voltage
Output Load Regulation
Line Regulation
Current Limit
LDO REGULATOR 2 (IN2, OUT2)
Input Voltage Range
Output Accuracy
Nominal Output Adjustment
Range
Output Ready Threshold
Dropout Voltage
Output Load Regulation
Line Regulation
Current Limit
LDO REGULATOR 3 (IN3, OUT3)
Input Voltage Range
Output Accuracy
V
IN3
I
OUT3
= 0.1mA to 20mA
2.7
-3
5.5
3
V
%
V
OUT2
V
RDY2
V
IN2
I
OUT2
= 0.1mA to 200mA
MAX886
MAX888
V
OUT2
= 3.3V (MAX886),
V
OUT2
= 1.527V (MAX888)
I
OUT2
= 1mA
I
OUT2
= 200mA
I
OUT2
= 0.1mA to 200mA
2.7V < V
IN2
< 3.8V, 0h code
-0.005
-0.3
200
500
2.7
-3
2.175
1.527
-7.5
-5
1
90
200
0.002
0.3
5.5
3
3.30
3.027
-3
V
%
V
% of
V
OUT2
mV
%/mA
%/V
mA
V
OUT1
V
IN1
I
OUT1
= 0.1mA to 100mA
MAX886
MAX888
I
OUT1
= 1mA
I
OUT1
= 100mA
I
OUT1
= 0.1mA to 100mA
3V < V
IN1
< 12V, 0h code
-0.01
-0.1
100
0
250
2.7
-3
2.70
1.25
1
90
200
0.01
0.1
12
3
4.95
3.5
V
%
V
mV
%/mA
%/V
mA
f
OSC
Table 4
-20
-23
0.8
·
f
OSC
f
OSC
20
23
1.2
·
f
OSC
%
kHz
R
ON
SYMBOL
CONDITIONS
I
OUT0
= 0.1mA to 500mA
3V < V
IN0
< 12V
V
LX
= 12V
V
LX
= 12V
V
IN0
= 3.8V
I
OUT0
63
0.6
-0.3
100
0.1
0.4
98
0.9
10
1
180
1.2
MIN
TYP
-1.5
0
0.3
MAX
UNITS
%
%
%
µA
Ω
mA
A
MAX886/MAX888
_______________________________________________________________________________________
3
Wireless and Satellite Handset
Power-Management ICs
MAX886/MAX888
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= V
IN0
= V
IN1
= +5.5V, GND = PGND = DGND, V
OFF
= V
SYNC
= 2.8V, V
IN2
= V
IN3
= V
IN4
= V
IN5
= +3.8V, V
OUT4
= +5.5V,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
V
IN3
= 5.5V,
Table 5
I
OUT3
= 1mA
I
OUT3
= 20mA
I
OUT3
= 0.1mA to 20mA
3.8V < V
IN3
< 5.5V, V
OUT3
= 2.85V
V
OUT3
= 2.85V or 4.65V only
-0.035
-0.3
20
50
f
OSC
/ 2
V
OUT4
No load
I
OUT4
= 50mA
2.7
I
OUT5
= 0.1mA to 100mA
V
OUT5
MAX886
MAX888
I
OUT5
= 1mA
I
OUT5
= 100mA
I
OUT5
= 0.1mA to 100mA
2.7V < V
IN5
< 3.8V, 0h code
-0.01
-0.3
100
V
LBI
= 1.23V
-0.2
V
REF
-
15mV
V
LBI
= step from 1.23V to 1.27V
V
LBO
= I
LBHYS
= 1mA,
V
LBI
= V
REF
- 15mV
V
LBO
= V
LBHYS
= 12V,
V
LBI
= V
REF
+ 15mV
-0.2
V
REF
10
0.5
0.2
250
0.2
V
REF
+
15mV
-3
2.175
1.25
1
72
200
0.01
0.3
5.10
5.25
5.21
5.5
3
3.300
3.50
5.41
CONDITIONS
MIN
TYP
0
Nominal Output Voltage
V
OUT3
2.85
4.65
V
OUT2
Dropout Voltage
Output Load Regulation
Line Regulation
Current Limit
CHARGE-PUMP REGULATOR 4 (IN4, OUT4)
Switching Frequency
Output Voltage
LDO REGULATOR 5 (IN5, OUT5)
Input Voltage Range
Output Accuracy
Nominal Output Adjustment
Range
Dropout Voltage
Output Load Regulation
Line Regulation
Current Limit
LOW-BATTERY COMPARATOR
LBI Input Current
LBI Threshold
LBI Propagation Delay
LBO/LBHYS
Output Low Voltage
LBO/LBHYS
Leakage Current
RESET AND START-UP TIMER
Reset Timeout Period
Start-Up Timeout Period
LOGIC AND CONTROL INPUTS
ON
Input Voltage
V
IL
V
IH
1.2
0.4
V
56
28
75
37
94
47
ms
ms
µA
V
µs
V
µA
V
IN5
V
%
V
mV
%/mA
%/V
mA
kHz
V
1
20
50
0.02
0.3
mV
%/mA
%/V
mA
V
MAX
UNITS
4
_______________________________________________________________________________________
Wireless and Satellite Handset
Power-Management ICs
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= V
IN0
= V
IN1
= +5.5V, GND = PGND = DGND, V
OFF
= V
SYNC
= 2.8V, V
IN2
= V
IN3
= V
IN4
= V
IN5
= +3.8V, V
OUT4
= +5.5V,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
ON
Input Current
SYNC Input Voltage
SYNC Input Current
ONSTAT OUTPUT
ONSTAT Output Voltage
ONSTAT Output Voltage
RESET
OUTPUT
Output Low Voltage
Output High Voltage
THERMAL SHUTDOWN
Threshold Temperature
I
2
C-COMPATIBLE SERIAL INTERFACE
SCL Clock Frequency
SCL Low Period
SCL High Period
Data Set-Up Time
Data Hold Time
OFF,
SDA, SCL Input Voltage
OFF,
SDA, SCL Input Current
SDA Output Low Voltage
LBO,
LBHYS Leakage Current
f
SCL
t
LOW
t
HIGH
t
DSU
t
DHOLD
V
IL
V
IH
I
ILH
0 < V
ILH
< V
OUT2
I
SDA
= 3mA
I
SDA
= 6mA
V
LBO
= V
LBHYST
= 12V,
V
LBI
= V
REF
+ 15mV
-0.2
1.4
1
0.4
0.6
0.2
1.3
0.6
100
0
0.9
0.6
400
kHz
µs
µs
ns
µs
V
µA
V
µA
160
°C
V
RESETL
V
RESETH
I
RESET
= 1mA
I
RESET
= 0,
internal 10kΩ pull-up resistor to OUT2
V
OUT2
-
0.5
0.5
V
V
V
ONSTATL
V
ONSTATH
I
ONSTAT
= 1mA
I
ONSTAT
= 0
V
OUT2
-
0.5
0.5
V
V
SYMBOL
I
IL
I
IH
V
IL
V
IH
I
SYNC
0 < V
SYNC
< V
OUT2
2.0
0.25
1
V
ON
= 0
1.2V < V
ON
< V
OUT2
CONDITIONS
MIN
TYP
-16
-5
MAX
-40
-10
0.8
UNITS
µA
V
µA
MAX886/MAX888
Note 1:
Specifications to -40°C are guaranteed by design, not production tested.
_______________________________________________________________________________________
5
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