Power Management ICs

IntroductionToday’s electronic devices make life better for families and society. In particular, the advent of smart devices with network connectivity holds great promise for making lives more efficient and more comfortable.

But these devices have a downside in terms of their environmental impact. Generally speaking, more devices consume more power and, in many cases, the more features a device has, the less energy efficient it is.

Fortunately, improvements in power management make it possible to have full-featured devices that are energy efficient and eco-friendly.

Fujitsu is a leader in environmentally-friendly power management technology through its lineup of Power Management ICs (PMICs), including DC/DC converters, charger ICs, and power monitoring and reset ICs. These highly efficient devices feature low power consumption, compact design, reduced external components, and effective control techniques for fast transient response and lower output voltage.

Fujitsu also offers evaluation boards and a web-based simulation tool, Easy DesignSim™, to simplify power management design and reduce development time.

In short, Fujitsu’s diversified PMIC lineup meets customer requirements for a broad range of applications.

Saving PowerHigh-EfficiencySaving Power

High-Efficiency

Small packaging with fewer external

components

Small packaging with fewer external

components

Control topology for ultra-fast

transient response and low-voltage

output

Control topology for ultra-fast

transient response and low-voltage

output

Eco* Device Solutions

*Eco: An onomatopoeic word between Ecology and Economy

2 PMIC Brochure PMIC Brochure 3

Power Management ICs Line-Up

DC/DC ConvertersFujitsu DC/DC converters provide an eco-friendly technology for many digital appliances ranging from PCs, cellular phones and other mobile terminals to digital TVs, digital cameras and DVCs.

For these converters, Fujitsu has focused on developing the switching regulators to achieve highly efficient, fast transient response and low power consumption.

The Fujitsu DC/DC converters combine state-of-the-art semiconductor design and production technology, system technology and application technology. Fujitsu offers one-channel through multi-channels DC/DC converters with high performance, advanced functions and user friendliness.

Features• High efficiency

• Fast transient response

• Low power consumption

• Varied product lineup

• One channel to multi-channels

Battery-Charger ICsWith the proliferation of mobile devices, users are demanding higher performance, greater efficiency, reduced power consumption and longer battery life.

Fujitsu meets these needs with its battery-charger ICs. The devices use a synchronous-rectification topology adopting Pulse Width Modification (PWM) to charge Li-ion batteries, which are used in devices such as notebook PCs. Fujitsu charger ICs safely and efficiently charge the battery by separately controlling the charge voltage and current, and by using the synchronous-rectification DC/DC converter topology.

An AC adapter-detection comparator, which is independent of the DC/DC converter control block, can control the source supplying the voltage to the system. The battery-charger IC supports a wide input voltage range, enables low current consumption in standby mode, and can precisely control the charge voltage and current, making the device perfect for the built-in Li-ion battery charger.

Features• Safe and efficient battery charging

• High charge voltage precision

• Support for 2-/3-/4-cell battery pack

• Various protect functions

• Built-in AC adapter detection function

• Low power consumption

6ch

4ch

3ch

2ch

1ch

1.7V 2.5V 4.5V 5.5V 7.0V 11.0V 115.0V 18.0V 25.0V 28.0V

* Bottom detection comparator method

Output Channels

Power supplyvoltage

MB39A123

MB39A302

MB39C316*1

MB39C331*2

GeneralGeneral(SW FET)

DC/DC+LDO

6MHz DC/DC

For System

LCD

Charge Control

MB39C022*3

MB39C326

MB39C015MB39C007

MB39C014MB39C006A

MB39C313A

MB39A112

MB39A104

MB39CO11A

MB39A134MB39A132A

MB39A136

MB39A135

MB39A130A

MB3800

MB39A214A

*1: 3ch DC/DC + 4ch LDO

*2: 2ch DC/DC + 12ch LDO

*3: 1ch DC/DC + 1ch LDO

Power Monitoring and Reset ICsFujitsu’s power-monitoring IC monitors the voltage level of one or two power supplies (+5V and an optional voltage) in a microprocessor or memory chip.

If the circuit’s power supply deviates more than a specified amount, the IC generates a reset signal to the microprocessor, protecting data from accidental erasure. Using this IC in a microcontroller system can provide it with a fail-safe function.

Features• Precision voltage detection

• Monitors the voltage of one or two power supplies

• Minimal number of external components

• Low power dissipation

• Watchdog timer (according to products)

SWOUT SWIN

SW1

SW2

CurrentSense

DeviceControl

Gate CONTROLLER

Over TempProtection Oscillator

BGRUVLO Err Amp

SW3

SW4 VOUT

D GND

A GND

VSEL

VSELSW

FB R1

VDD

CIN

VCC

EN

XPSILIMSEL

R2R3

L1

0.5µH

Cout

10µF (1608)

2.5V up to 5.5VVbatt

VoutVin

R2

L

R1

Cin

CO

UT

GN

D

GN

D

MB39C3266MHZ

0.5µHSize:2x2mm

2.2µHSize:4x4mm

Conventional2MHZ

GN

D

VOUTVIN

L

CO

UT

CIN

CO

UT

R2

R1

GN

D

GN

D

Footprint reduced by half

MCU3.3V5VUSB I/F

MB39C326

LCD

FRAM

Buzzer

LEDs

Key pads

USB

5VAC/DC

2.5V-4.2vSingle cell Li-ion battery

MB39C326

BaseBand

Single cellLi-ion battery

Vout

Power supply for PA

Cntl_Vout

RF PA

Handheld devices with a 1cell Li-ion battery

RF-Power Amplifier

MB39C326 Block Diagram

MB39C326 Design Benefit

DC/DC Converter and Battery-Charger ICs line-up

MB39C326 Application Examples

New Featured Product6MHz buck-boost DC/DC converter: MB39C326The highly efficient MB39C326 6MHz Synchronous Buck Boost DC/DC converter is designed to power mobile devices that use a single-cell Li-ion battery and radio frequency power amplifiers (RFPAs). The DC/DC converter switches at a higher frequency (6MHz) than conventional converters on the market. The higher switching frequency is more efficient and permits the use of a smaller inductor, reducing the overall board space of the power management circuits by as much as half.

The buck-boost functionality of the Fujitsu MB39C326 helps prolong battery life and efficiency. By switching automatically between a buck operation (stepping down the voltage) when the battery is fully charged and a boost operation (stepping up the voltage) as the battery is discharged, the MB39C326

maximizes the overall operating voltage from the lithium battery while providing a stable power supply to the power amplifier. The result is a more consistent voltage level and a device that can operate longer on a single charge.

Applications• Mobile phones, PDAs and handheld devices

• Radio frequency power amplifiers powered by a single-cell Li-ion battery

• PC cards and USB dongles with RF transceivers

• Medical handheld devices

Function Classification MB3773 MB3771 MB3790 MB3793

Power monitoring ü Mü ü 7ü3

Power-On reset ü ü ü ü

Watchdog timer ü – – ü

Battery backup – – ü –

FujItsu sEMICONDuCtOR AMERICA, INC.Corporate Headquarters1250 E. Arques Avenue, M/S 333, Sunnyvale, CA 94085-5401Tel: (800) 866-8608 Fax: (408) 737-5999E-mail: FSA_inquiry@us.fujitsu.com | Website: http://us.fujitsu.com/semi

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©2012 Fujitsu Semiconductor America, Inc.All company and product names are trademarks or registered trademarks of their respective owners.Specifications subject to change without notice.

Printed in the U.S.A. PMIC-BR-21427-05/2012

Select Product

Select the target devices for your design

Set Parameters

Set the input/output voltage, load current, etc.

Create Schematic Selection

Calculate the peripheral components and

make a schematic based on the set parameters

SimulateCharacteristics

Simulate and analyze the AC or DC characteristics

CreateBill of Materials

Create the BOM, and save your design

VOLT2

VOLT1

PCND

MCDC1

VERNI

VDGT

VREFVEEFVIN

AGND

CTLICTL2CTLF

VVPORVPOR

VERF

VOLT1

MCDC2

VCTL

PGND

MN VOLT1

VOUT

VOUT

MB39C015

Design Tool

DescriptionThe Fujitsu Easy DesignSim™ is a comprehensive online design simulation and support solution for design engineers working with Fujitsu’s extensive line of power management ICs. The tool simplifies the process of designing circuit diagrams for power supplies. It automatically calculates key power parameters and simulates the operation of the power supply online.

Features• Free design simulator

• Makes it easy to build a power design for DC/DC controllers and converters

• Can automatically select and edit the peripheral components

• Can simulate the various characteristics of power rails

• Provides Bill of Material from the database of electronics vendors

• Design can be saved to your computer

Evaluation BoardsFujitsu Semiconductor provides evaluation boards for users to evaluate the company’s semiconductor devices.