MAX8805YEWEBE+T Maxim Integrated Products, MAX8805YEWEBE+T Datasheet

IC CONV STP-DN PWM 600MA 16WLP

MAX8805YEWEBE+T

Manufacturer Part Number
MAX8805YEWEBE+T
Description
IC CONV STP-DN PWM 600MA 16WLP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8805ZEWECCT.pdf (24 pages)

Specifications of MAX8805YEWEBE+T

Applications
Converter, WCDMA PA Power
Voltage - Input
2.7 ~ 5.5 V
Number Of Outputs
1
Voltage - Output
0.4 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-WLP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
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).
19-0777; Rev 5; 2/10
UCSP is a trademark of Maxim Integrated Products, Inc.
+ 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.
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.
MAX8805WERExy+T*
MAX8805XERExy+T*
MAX8805YERExy+T*
MAX8805ZERExy+T*
600mA/650mA PWM Step-Down Converters in
RMS
typ). Each LDO is individually enabled
PART
________________________________________________________________ Maxim Integrated Products
2mm x 2mm WLP for WCDMA PA Power
General Description
PIN-PACKAGE
16 UCSP
16 UCSP
16 UCSP
16 UCSP
™
o PA Step-Down Converter
o Dual Low-Noise LDOs
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
SWITCHING FREQUENCY
Pin Configuration appears at end of data sheet.
Packages (4 x 4 Grid)
7.5µs (typ) Settling Time for 0.8V to 3.4V Output
Dynamic Output Voltage Setting from 0.4V to
60mΩ pFET and 100% Duty Cycle for Low
2MHz or 4MHz Switching Frequency
Low Output-Voltage Ripple
600mA (MAX8805Y/MAX8805Z) or 650mA
2% Gain Accuracy
Tiny External Components
Low 35µV
High 70dB (typ) PSRR
Guaranteed 200mA Output Drive Capability
Individual ON/OFF Control
WCDMA/NCDMA Cellular Handsets
Wireless PDAs
Smartphones
Voltage Change
V
Dropout
(MAX8805W/MAX8805X) Output Drive
Capability
BATT
2MHz
4MHz
2MHz
4MHz
RMS
(typ) Output Noise
Ordering Information
REFIN TO OUT GAIN
Applications
2.5V/V
2.5V/V
2V/V
2V/V
Features
1

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MAX8805YEWEBE+T Summary of contents

Page 1

... Each LDO is individually enabled RMS 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. PART MAX8805WERExy+T* MAX8805XERExy+T* MAX8805YERExy+T* MAX8805ZERExy+T* + Denotes a lead-free/RoHS-compliant package. ...

Page 2

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ABSOLUTE MAXIMUM RATINGS IN1A, IN1B, IN2, REFIN, EN2, REFBP to AGND ...-0.3V to +6.0V PAA, PAB, PA_EN AGND....-0. LDO1, LDO2, EN1 to AGND ...

Page 3

... Current Limit V LDO1 Dropout Voltage I LDO1 Line Regulation V IN2 Load Regulation I LDO1 Power-Supply Rejection 10Hz to 10kHz, C Dual Mode is a trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________ = V = 3.6V 0V, V EN1 EN2 HP REFIN =+25°C, unless otherwise noted.) (Note 1) A CONDITIONS MAX8805Y/MAX8805Z rising, 50mV hysteresis ...

Page 4

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ELECTRICAL CHARACTERISTICS (continued IN1A IN1B IN2 PA_EN (MAX8805W/MAX8805X -40°C to +85°C. Typical values are at T ...

Page 5

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) BYPASS MODE DROPOUT VOLTAGE vs. PA LOAD CURRENT 140 120 ...

Page 6

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) PA STEP-DOWN CONVERTER EFFICIENCY vs. LOAD CURRENT (MAX8805X/MAX8805Z) 100 V ...

Page 7

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) REFIN vs. REFIN TO OUT GAIN (MAX8805X ...

Page 8

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) PA STEP-DOWN SOFT-START WAVEFORMS (MAX8805X/MAX8805Z) V PA_EN V PA_ I ...

Page 9

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) PA STEP-DOWN CONVERTER OUTPUT VOLTAGE TRANSIENT RESPONSE (MAX8805Y/MAX8805Z) V REFIN ...

Page 10

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) PA STEP-DOWN CONVERTER AUTOMATIC BYPASS-FET TRANSIENT RESPONSE (MAX8805W/MAX8805X) 1.44V 0.48V ...

Page 11

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power ( 3.6V 1.2V, V IN1A IN1B IN2 PA_ erwise noted.) LDO PSRR vs. FREQUENCY ...

Page 12

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power PIN NAME Reference Noise Bypass. Bypass REFBP to AGND with a 0.22µF ceramic capacitor to reduce noise on the A1 REFBP LDO outputs. REFBP is internally pulled ...

Page 13

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power IN1A IN1B REFIN IN2 REFBP 1.25V REFERENCE AGND BANDGAP EN1 CONTROL EN2 LOGIC PA_EN Figure 1. Block Diagram ______________________________________________________________________________________ BYPASS ...

Page 14

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Detailed Description The MAX8805W/MAX8805X/MAX8805Y/MAX8805Z are designed to dynamically power the PA in WCDMA and NCDMA handsets. The devices contain a high-frequency, high-efficiency step-down converter, and two LDOs. ...

Page 15

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power shutdown, the outputs of the LDOs are pulled to ground through an internal 1kΩ resistor. When the PA step-down and LDOs are all in shutdown, the MAX8805W/MAX8805X/MAX8805Y/MAX8805Z ...

Page 16

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Table 2. Suggested Inductors MANUFACTURER SERIES Coilcraft LPO3310 MIPF2520 FDK MIPS2520 MIPF2016 Hitachi KSLI-252010 Murata LQH32C_53 Sumida CDRH2D09 CDRH2D11 Taiyo Yuden CB2518T D3010FB D2812C TOKO D310F D312C ...

Page 17

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power MAX8805W/MAX8805X/MAX8805Y/MAX8805Z. The impedance the switching frequency should IN1 be kept very low. Ceramic capacitors with X5R or X7R dielectric are highly recommended due to ...

Page 18

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power AGND C BYP C LDO2 C IN2 VIN Figure 3. Recommended PCB Layout 18 ______________________________________________________________________________________ PGND VPA C LDO1 5.5mm C C IN1 ...

Page 19

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Li+ BATTERY 2.2µF DAC BASEBAND PROCESSOR GPIO GPIO GPIO GPIO 1µF *1µH FDK MIPS 2520D1R0 2.2µH FDK MIPF 2520D2R2 Figure 4. Typical Application Circuit Using LDOs for ...

Page 20

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Li+ BATTERY 2.2µF DAC BASEBAND PROCESSOR GPIO GPIO GPIO GPIO 2.2µF *1µH FDK MIPS 2520D1R0 2.2µH FDK MIPF 2520D2R2 Figure 5. Typical Application Circuit Using LDOs for ...

Page 21

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Pin Configuration TOP VIEW REFBP AGND REFIN LDO2 PA_EN EN2 IN2 HP IN1B LDO1 EN1 PAB D1 D2 ...

Page 22

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...

Page 23

PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...

Page 24

... 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. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...

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