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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX888 Datasheet

Wireless and Satellite Handset Power-Management ICs

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19-1438; Rev 0; 3/99
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
Wireless and Satellite Handset
Power-Management ICs
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 I2C™-
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.
Satellite Phones
Wireless Handsets
Applications
Private Mobile Radio (PMR)
GSM Cellular/PCS Telephones
Pin Configuration appears at end of data sheet.
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 I2C-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)
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX886ECJ*
-40°C to +85°C 32 TQFP
MAX888ECJ
-40°C to +85°C 32 TQFP
* Future product—contact factory for availability.
Typical Operating Circuit
IN
2.7V TO 12V
LOW-BATTERY
DETECT
I2C-COMPATIBLE
SERIAL INTERFACE
ON/OFF CONTROL
(OPTIONAL)
BATT
LBI
LBO
SCL
SDA
ON
OFF
SYNC
C+
C-
MAX886
MAX888
GND
LX
PGND
OUT0
OUT1
OUT2
RESET
OUT3
OUT4
OUT5
ONSTAT
MAIN POWER (UP TO 500mA)
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
I2C 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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX888 Datasheet

Wireless and Satellite Handset Power-Management ICs

No Preview Available !

Wireless and Satellite Handset
Power-Management ICs
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 (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)
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)
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
(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
BATT, IN0, IN1 Operating Voltage VBATT, VIN0,
Range
VIN1
2.7 12 V
IN2, IN3, IN4, IN5 Operating
Voltage Range
Undervoltage Lockout
Supply Current, PFM Mode
Supply Current, PWM Mode
VIN2, VIN3,
VIN4, VIN5
VUVLOF
VUVLOR
IBATTPFM
IBATTPWM
Supply Current, Shutdown Mode
ISTNBY
REFERENCE
Reference Output Voltage
VREF
Reference Load Regulation
Reference Supply Rejection
DC-DC BUCK REGULATOR 0 (IN0, OUT0)
Input Voltage Range
VIN0
Output Accuracy
Nominal Output Adjustment
Range
VOUT0
VBATT falling
VBATT rising
SYNC = GND
fOSC = 375kHz
fOSC = 535kHz
fOSC = 670kHz
fOSC = 925kHz
OFF = GND
TA = 0°C to +85°C
TA = -40°C to +85°C
IREF = 0
TA = 0°C to +85°C
TA = -40°C to +85°C
1µA < IREF < 100µA
2.7V < VOUT0 < 3.75V
IOUT0 = 0
MAX886
MAX888
2.7
2.35
1.23
1.225
2.7
-3
2.625
1.527
2.45
2.55
250
2
3
4
5.5
5
1.25
5
0.2
5.5
2.65
600
12
10
15
1.27
1.275
15
5
12
3
3.750
3.027
V
V
V
µA
mA
µA
V
mV
mV
V
%
V
Output Ready Threshold
VOUT0 = 3.75V (MAX886),
VOUT0 = 2.027V (MAX888)
-7.5 -5
-3
% of
VOUT0
2 _______________________________________________________________________________________


Part Number MAX888
Description Wireless and Satellite Handset Power-Management ICs
Maker Maxim
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MAX888 Datasheet PDF





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