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MAX8805, MAX8805W, MAX8805X, MAX8805Y, MAX8805Z

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

Small (4mm)² Package Provides Power and Bias to 2 WCDMA PA Modules

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

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 biasing 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 automatically 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 a 16-bump, 2mm x 2mm WLP and UCSP™ packages (0.7mm max height).

Data Sheet

Download	Rev 5	(PDF, 884kB)
E-Mail

An evaluation kit is available: MAX8805WEVKIT

Key Features

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
Dual Low-Noise LDOs
- Low 35µV_RMS (typ) Output Noise
- High 70dB (typ) PSRR
- Guaranteed 200mA Output Drive Capability
- Individual ON/OFF Control
Low 0.1µA Shutdown Current
2.7V to 5.5V Supply Voltage Range
Thermal Shutdown
Tiny 2mm x 2mm x 0.7mm WLP and UCSP Packages (4 x 4 Grid)

Applications/Uses

Smartphones
WCDMA/NCDMA Cellular Handsets
Wireless PDAs

Key Specifications:

Step-Down Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX8805

2.7

5.5

0.4

5.5

0.65

Dyn. REF In

4000

WLP/16

4.5

$1.91 @1k

See All Step-Down Switching Regulators (284)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

MAX8805Y, MAX8805Z

Application Notes

Tutorial 5100

General Layout Guidelines for RF and Mixed-Signal PCBs

Product Guides

Communications (PDF)

Reliability Reports

Reliability Report:	MAX8805W.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

none

Ordering Information

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Tape and Reel

Sample

Devices: 1-50 / 53

<-- Previous 1 2 Next -->

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8805WEWEAA+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEAC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEAD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEAE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEBC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEBD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEBE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWECC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWECD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWECE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8805WEWEDD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEEE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805WEWEEE+TC8E			Active	WLP; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8805WEWEGG+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEAA+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEAC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEAD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEAE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEBC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEBD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8805XEWEBE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWECC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWECD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWECE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEDD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEEE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805XEWEGG+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEAA+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEAC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEAD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8805YEWEAE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEBC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEBD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEBE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEBG+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWECC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWECD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWECE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEDD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805YEWEEE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8805YEWEGG+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEAA+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEAC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEAD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEAE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEBC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWEBE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWECC+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWECD+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8805ZEWECE+T			Active	WLP;16 pin;4.5 mm² Outline Drawing:21-0200 (PDF) Land Pattern: Not Available Use pkgcode/variation: W162B2+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Devices: 1-50 / 53

<-- Previous 1 2 Next -->

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

MAX8805WEVKIT

Evaluation Kit for the MAX8805W/X/Y/Z

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