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MAX8805XEWEAA+T

Description
600mA/650mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power
CategoryPower/power management    The power supply circuit   
File Size875KB,24 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

MAX8805XEWEAA+T Overview

600mA/650mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power

MAX8805XEWEAA+T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeBGA
package instructionVFBGA, BGA16,4X4,20
Contacts16
Reach Compliance Codecompli
ECCN codeEAR99
Other featuresALSO OPERATES AS LDO REGULATOR; PWM CONROL TECHNIQUE ALSO POSSIBLE
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyHYSTERETIC CURRENT MODE
Maximum input voltage5.5 V
Minimum input voltage2.7 V
Nominal input voltage3.6 V
JESD-30 codeS-PBGA-B16
length2.045 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1.15 A
Nominal output voltage1.8 V
Package body materialPLASTIC/EPOXY
encapsulated codeVFBGA
Encapsulate equivalent codeBGA16,4X4,20
Package shapeSQUARE
Package formGRID ARRAY, VERY THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.69 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency4000 kHz
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formBALL
Terminal pitch0.5 mm
Terminal locationBOTTOM
Maximum time at peak reflow temperatureNOT SPECIFIED
width2.045 mm
19-0777; Rev 5; 2/10
KIT
ATION
EVALU
BLE
AVAILA
600mA/650mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
General Description
The MAX8805W/MAX8805X/MAX8805Y/MAX8805Z
high-frequency step-down converters are optimized for
dynamically powering the power amplifier (PA) in
WCDMA or NCDMA handsets. The devices integrate a
high-efficiency PWM step-down converter for medium-
and low-power transmission, and a 60mΩ typical
bypass FET to power the PA directly from the battery
during high-power transmission. Dual 200mA low-noise,
high-PSRR low-dropout regulators (LDOs) for PA bias-
ing are also integrated.
Two switching frequency options are available (2MHz for
the MAX8805W/MAX8805Y and 4MHz for the MAX8805X/
MAX8805Z), allowing optimization for smallest solution
size or highest efficiency. Fast switching allows the use of
small ceramic 2.2µF input and output capacitors while
maintaining low ripple voltage. The feedback network is
integrated, further reducing external component count
and total solution size.
The MAX8805W/MAX8805X/MAX8805Y/MAX8805Z use
an analog input driven by an external DAC to control
the output voltage linearly for continuous PA power
adjustment. The REFIN to OUT gain is available in two
options (2V/V for the MAX8805Y/MAX8805Z and 2.5V/V
for the MAX8805W/MAX8805X). At high-duty cycle, the
MAX8805W/MAX8805X/MAX8805Y/MAX8805Z auto-
matically switch to the bypass mode, connecting the
input to the output through a low-impedance (60mΩ
typ) MOSFET. The user can also enable the bypass
mode directly through a logic-control input.
The LDOs in the MAX8805W/MAX8805X/MAX8805Y/
MAX8805Z are designed for low-noise operation
(35µV
RMS
typ). Each LDO is individually enabled
through its own logic control interface.
The MAX8805W/MAX8805X/MAX8805Y/MAX8805Z are
available in 16-bump, 2mm x 2mm WLP and UCSP
packages (0.7mm max height).
UCSP is a trademark of Maxim Integrated Products, Inc.
Features
o
PA Step-Down Converter
7.5µs (typ) Settling Time for 0.8V to 3.4V Output
Voltage Change
Dynamic Output Voltage Setting from 0.4V to
V
BATT
60mΩ pFET and 100% Duty Cycle for Low
Dropout
2MHz or 4MHz Switching Frequency
Low Output-Voltage Ripple
600mA (MAX8805Y/MAX8805Z) or 650mA
(MAX8805W/MAX8805X) Output Drive
Capability
2% Gain Accuracy
Tiny External Components
o
Dual Low-Noise LDOs
Low 35µV
RMS
(typ) Output Noise
High 70dB (typ) PSRR
Guaranteed 200mA Output Drive Capability
Individual ON/OFF Control
o
Low 0.1µA Shutdown Current
o
2.7V to 5.5V Supply Voltage Range
o
Thermal Shutdown
o
Tiny 2mm x 2mm x 0.7mm WLP and UCSP
Packages (4 x 4 Grid)
MAX8805W/MAX8805X/MAX8805Y/MAX8805Z
Applications
WCDMA/NCDMA Cellular Handsets
Wireless PDAs
Smartphones
Pin Configuration appears at end of data sheet.
Ordering Information
PART
MAX8805WERExy+T*
MAX8805XERExy+T*
MAX8805YERExy+T*
PIN-PACKAGE
16 UCSP
16 UCSP
16 UCSP
SWITCHING FREQUENCY
2MHz
4MHz
2MHz
REFIN TO OUT GAIN
2.5V/V
2.5V/V
2V/V
2V/V
MAX8805ZERExy+T*
16 UCSP
4MHz
+Denotes
a lead-free/RoHS-compliant package.
T = Tape and reel.
*xy
is the output voltage code (see Table 1).
Note:
All devices are specified over the -40°C to +85°C operating temperature range.
Ordering Information continued at end of data sheet.
________________________________________________________________
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.
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