EA8938

EA8938 Datasheet

Part	Datasheet
EA8938	EA8938 (pdf)

Related Parts	Information
ACT8938	ACT8938

PDF Datasheet Preview
• Optimized for Marvell Aspen Processors • Three Step-Down DC/DC Converters • Four Low-Dropout Linear Regulators • Integrated ActivePathTM Charger • I2CTM Serial Interface • Advanced Enable/Disable Sequencing Controller • Minimal External Components • Tiny 5x5mm TQFN55-40 Package − 0.75mm Package Height − Pb-Free and RoHS Compliant ACT8938 Advanced PMU for Marvell Aspen The ACT8938 is a complete, cost effective, highly efficient ActivePMUTM power management solution, optimized for the unique power, voltage sequencing, and control requirements of the Marvell Aspen processor. This device features three step-down DC/DC converters and four low-noise, low-dropout linear regulators, along with a complete battery charging solution featuring the advanced ActivePathTM system-power selection function. The three DC/DC converters utilize a high efficiency, fixed-frequency 2MHz , current-mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are capable of supplying up to 1150mA of output current, while the third supports up to 1300mA. All four low-dropout linear regulators are highperformance, low-noise regulators that supply up to 150mA, 150mA, 320mA and 320mA respectively. The ACT8938 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package TYPICAL APPLICATION DIAGRAM Active-Semi Marvell Aspen Innovative PowerTM Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. ACT8938 TABLE OF CONTENTS General Information 01 Functional Block 03 Ordering 04 Pin Configuration 04 Pin 05 Absolute Maximum Ratings 07 I2C Interface Electrical Characteristics 08 Global Register Map 09 Register and Bit Descriptions 10 System Control Electrical 15 Step-Down DC/DC Electrical Characteristics 16 Low-Noise LDO Electrical 17 ActivePathTM Charger Electrical 18 Typical Performance 20 System control information 28 Interfacing with the Marvell Aspen 28 Control Signals 29 Push-Button 30 Control 30 Functional Description 33 I2C Interface 33 Voltage Monitor and 33 Thermal Shutdown 34 Step-own DC/DC 35 General 35 100% Duty Cycle 35 Synchronous 35 Soft-Start 35 Compensation 35 Configuration 35 OK[ ] and Output Fault 36 PCB Layout Considerations 36 Low-Noise, Low-Dropout Linear 37 General 37 Output Current Limit 37 Compensation 37 Configuration 37 OK[ ] and Output Fault 37 PCB Layout Considerations 38 TQFN55-40 Package Outline and Dimensions 45 Innovative PowerTM Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. FUNCTIONAL BLOCK DIAGRAM Optional AC Adaptor USB 4.35V to 6V CHGIN ACIN VSYS nSTAT BODY SWITCH ActivePath Control CHGLEV ISET OUT2 nRSTO nPBIN PUSH BUTTON OUT2 nPBSTAT OUT2 nIRQ VSYS PWRHLD nHIB VSEL LBI VSYS nLBO 1.2V REFBP Reference Active-Semi ACT8938 VSYS System Supply BODY SWITCH CHARGE STATUS Charge Control CURRENT SENSE ORDERING INFORMATION PART NUMBER VOUT1/VSTBY1 VOUT2/VSTBY2 VOUT3/VSTBY3 VOUT4 VOUT5 VOUT6 VOUT7 PACKAGE PINS TEMPERATURE RANGE ACT8938QJ133-T 1.8V/1.8V 3.3V/3.3V 1.2V/1.1V 1.8V 3.3V 3.3V 3.3V TQFN55-40 -40°C to +85°C ACT8938QJ131-T 1.8V/1.8V 3.3V/3.3V 1.1V/1.0V 1.8V 3.3V 3.3V 3.3V TQFN55-40 -40°C to +85°C All Active-Semi components are RoHS Compliant and with Pb-free plating unless otherwise specified. Standard product options are listed in this table. Contact factory for custom options. Minimum order quantity is 12,000 units. To select VSTBYx as the output regulation voltage for REGx, drive VSEL to logic high. VSTBYx can be set by software via I2C interface. Refer to appropriate sections of this datasheet for VSTBYx setting. ACT8938QJ_ _-T Active-Semi Product Number Package Code Pin Count Option Code Tape and Reel PIN CONFIGURATION TOP VIEW NC VP1 SW1 GP12 SW2 VP2 OUT2 CHGIN VSYS REFBP OUT1 GA OUT4 OUT5 INL OUT7 OUT6 nPBIN PWRHLD ACTIVE AA33 DATE CODE BAT nSTAT SDA SCL VSEL TH ISET CHGLEV ACIN nRSTO nIRQ nPBSTAT GP3 SW3 VP3 OUT3 PWREN nLBO LBI Thin - QFN TQFN55-40 Innovative PowerTM Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. ACT8938 PIN DESCRIPTIONS PIN NAME REFBP Reference Bypass. Connect a 0.047uF ceramic capacitor from REFBP to GA. This pin is discharged to GA in shutdown. OUT1 Output Feedback Sense for REG1. Connect this pin directly to the output node to connect the internal feedback network to the output voltage. Analog Ground. Connect GA directly to a quiet ground node. Connect GA, GP12 and GP3 together at a single point as close to the IC as possible. REG4 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic OUT4 capacitor from OUT4 to GA. The output is discharged to GA with resistor when disabled. REG5 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic OUT5 capacitor from OUT5 to GA. The output is discharged to GA with resistor when disabled. VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section. 2 IMAX Maximum Output Current. Innovative PowerTM - 16 - Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. ACT8938 LOW-NOISE LDO ELECTRICAL CHARACTERISTICS VINL = 3.6V, COUT4 = COUT5 = 1.5µF, COUT6 = COUT7 = 3.3µF, LOWIQ[ ] = [0], TA = 25°C, unless otherwise specified. PARAMETER Operating Voltage Range Output Voltage Accuracy Line Regulation Load Regulation Power Supply Rejection Ratio Supply Current per Output Soft-Start Period Power Good Threshold Power Good Hysteresis Output Noise Discharge Resistance REG4 Dropout Voltage Maximum Output Current Limit Stable COUT4 Range REG5 Dropout Voltage Maximum Output Current Limit Stable COUT5 Range REG6 Dropout Voltage Maximum Output Current Limit Stable COUT6 Range REG7 Dropout Voltage Maximum Output Current Limit Stable COUT7 Range TEST CONDITIONS VOUT 1.2V, TA = 25°C, IOUT = 10mA VOUT < 1.2V, TA = 25°C, IOUT = 10mA VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [0] VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [1] IOUT = 1mA to IMAX2 f = 1kHz, IOUT = 20mA, VOUT =1.2V f = 10kHz, IOUT = 20mA, VOUT =1.2V Regulator Enabled, LOWIQ[ ] = [0] Regulator Enabled, LOWIQ[ ] = [1] Regulator Disabled VOUT = 2.9V VOUT Rising VOUT Falling IOUT = 20mA, f = 10Hz to 100kHz, VOUT = 1.2V LDO Disabled, DIS[ ] = 1 IOUT = 80mA, VOUT > 3.1V VOUT = 95% of regulation voltage IOUT = 80mA, VOUT > 3.1V VOUT = 95% of regulation voltage IOUT = 160mA, VOUT > 3.1V VOUT = 95% of regulation voltage IOUT = 160mA, VOUT > 3.1V VOUT = 95% of regulation voltage MIN TYP MAX UNIT VNOM VNOM mV/V 75 dB µVRMS 140 280 mV 140 280 mV VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section. 2 IMAX Maximum Output Current. 3 Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the regulation voltage for 3.1V output voltage or higher . LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage. Innovative PowerTM - 17 - Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. ACT8938 ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS VCHGIN = 5.0V, TA = 25°C, unless otherwise specified. PARAMETER ActivePath CHGIN Operating Voltage Range CHGIN UVLO Threshold CHGIN UVLO Hysteresis CHGIN OVP Threshold CHGIN OVP Hysteresis CHGIN Supply Current CHGIN to VSYS On-Resistance CHGIN to VSYS Current Limit VSYS REGULATION VSYS Regulated Voltage nSTAT OUTPUT nSTAT Sink current nSTAT Leakage Current ACIN AND CHGLEV INPUTS CHGLEV Logic High Input Voltage CHGLEV Logic Low Input Voltage CHGLEV Leakage Current ACIN Voltage Thresholds ACIN Hysteresis voltage threshold ACIN Leakage Current TH INPUT TH Pull-Up Current VTH Upper Temperature Voltage Threshold VTHH VTH Lower Temperature Voltage Threshold VTHL VTH Hysteresis TEST CONDITIONS CHGIN Voltage Rising CHGIN Voltage Falling CHGIN Voltage Rising CHGIN Voltage Falling VCHGIN < VUVLO VCHGIN < VBAT + 50mV, VCHGIN > VUVLO VCHGIN > VBAT + 150mV, VCHGIN > VUVLO Charger disabled, IVSYS = 0mA IVSYS = 100mA ACIN = VSYS ACIN = GA, CHGLEV = GA ACIN = GA, CHGLEV = VSYS IVSYS = 10mA VnSTAT = 2V VnSTAT = 4.2V VCHGLEV = 4.2V ACIN voltage rising ACIN voltage falling VACIN = 4.2V VCHGIN > VBAT + 100mV, Hysteresis = 50mV Hot Detect NTC Thermistor Cold Detect NTC Thermistor Upper and Lower Thresholds MIN TYP MAX UNIT 100 200 µA 400 450 500 12 mA 91 102 110 µA V Innovative PowerTM - 18 - Active-Semi Authorized Recipients and Customers ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright 2011 Active-Semi, Inc. ACT8938 ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS CONT’D VCHGIN = 5.0V, TA = 25°C, unless otherwise specified. PARAMETER TEST CONDITIONS TYP MAX UNIT Charge Termination Voltage VTERM

PDF Datasheet Preview

• Optimized for Marvell Aspen Processors
• Three Step-Down DC/DC Converters
• Four Low-Dropout Linear Regulators
• Integrated ActivePathTM Charger
• I2CTM Serial Interface
• Advanced Enable/Disable Sequencing Controller
• Minimal External Components
• Tiny 5x5mm TQFN55-40 Package
− 0.75mm Package Height − Pb-Free and RoHS Compliant

ACT8938

Advanced PMU for Marvell Aspen

The ACT8938 is a complete, cost effective, highly efficient ActivePMUTM power management solution, optimized for the unique power, voltage sequencing, and control requirements of the Marvell Aspen processor.

This device features three step-down DC/DC converters and four low-noise, low-dropout linear regulators, along with a complete battery charging solution featuring the advanced ActivePathTM system-power selection function.

The three DC/DC converters utilize a high efficiency, fixed-frequency 2MHz , current-mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are capable of supplying up to 1150mA of output current, while the third supports up to 1300mA. All four low-dropout linear regulators are highperformance, low-noise regulators that supply up to 150mA, 150mA, 320mA and 320mA respectively.

The ACT8938 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package

TYPICAL APPLICATION DIAGRAM

Active-Semi

Marvell Aspen

Innovative PowerTM

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

ACT8938

TABLE OF CONTENTS
General Information 01 Functional Block 03 Ordering 04 Pin Configuration 04 Pin 05 Absolute Maximum Ratings 07 I2C Interface Electrical Characteristics 08 Global Register Map 09 Register and Bit Descriptions 10 System Control Electrical 15 Step-Down DC/DC Electrical Characteristics 16 Low-Noise LDO Electrical 17 ActivePathTM Charger Electrical 18 Typical Performance 20

System control information 28 Interfacing with the Marvell Aspen 28 Control Signals 29 Push-Button 30 Control 30

Functional Description 33 I2C Interface 33

Voltage Monitor and 33

Thermal Shutdown 34

Step-own DC/DC 35 General 35 100% Duty Cycle 35 Synchronous 35 Soft-Start 35 Compensation 35 Configuration 35 OK[ ] and Output Fault 36 PCB Layout Considerations 36

Low-Noise, Low-Dropout Linear 37 General 37 Output Current Limit 37 Compensation 37 Configuration 37 OK[ ] and Output Fault 37 PCB Layout Considerations 38

TQFN55-40 Package Outline and Dimensions 45

Innovative PowerTM

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

FUNCTIONAL BLOCK DIAGRAM

Optional

AC Adaptor USB
4.35V to 6V CHGIN ACIN

VSYS nSTAT

BODY SWITCH

ActivePath Control

CHGLEV

ISET OUT2
nRSTO
nPBIN PUSH BUTTON

OUT2 nPBSTAT

OUT2 nIRQ

VSYS

PWRHLD
nHIB VSEL

LBI VSYS
nLBO
1.2V

REFBP

Reference

Active-Semi

ACT8938

VSYS System Supply

BODY SWITCH

CHARGE STATUS

Charge Control

CURRENT SENSE
ORDERING INFORMATION

PART NUMBER VOUT1/VSTBY1

VOUT2/VSTBY2 VOUT3/VSTBY3 VOUT4 VOUT5 VOUT6 VOUT7 PACKAGE PINS

TEMPERATURE RANGE

ACT8938QJ133-T 1.8V/1.8V 3.3V/3.3V 1.2V/1.1V 1.8V 3.3V 3.3V 3.3V TQFN55-40 -40°C to +85°C

ACT8938QJ131-T 1.8V/1.8V 3.3V/3.3V 1.1V/1.0V 1.8V 3.3V 3.3V 3.3V TQFN55-40 -40°C to +85°C

All Active-Semi components are RoHS Compliant and with Pb-free plating unless otherwise specified.

Standard product options are listed in this table. Contact factory for custom options. Minimum order quantity is 12,000 units. To select VSTBYx as the output regulation voltage for REGx, drive VSEL to logic high. VSTBYx can be set by software via I2C interface. Refer to appropriate sections of this datasheet for VSTBYx setting.

ACT8938QJ_ _-T

Active-Semi Product Number

Package Code Pin Count Option Code Tape and Reel

PIN CONFIGURATION

TOP VIEW

NC VP1 SW1 GP12 SW2 VP2 OUT2 CHGIN VSYS

REFBP OUT1 GA OUT4 OUT5 INL OUT7 OUT6 nPBIN

PWRHLD

ACTIVE AA33

DATE CODE

BAT nSTAT SDA SCL VSEL TH ISET CHGLEV ACIN
nRSTO nIRQ
nPBSTAT GP3 SW3 VP3

OUT3 PWREN
nLBO LBI

Thin - QFN TQFN55-40

Innovative PowerTM

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

ACT8938

PIN DESCRIPTIONS

PIN NAME

REFBP

Reference Bypass. Connect a 0.047uF ceramic capacitor from REFBP to GA. This pin is discharged to GA in shutdown.

OUT1

Output Feedback Sense for REG1. Connect this pin directly to the output node to connect the internal feedback network to the output voltage.

Analog Ground. Connect GA directly to a quiet ground node. Connect GA, GP12 and GP3 together at a single point as close to the IC as possible.

REG4 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic

OUT4 capacitor from OUT4 to GA. The output is discharged to GA with resistor when disabled.

REG5 output. Capable of delivering up to 150mA of output current. Connect a 1.5µF ceramic

OUT5 capacitor from OUT5 to GA. The output is discharged to GA with resistor when disabled.
VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section. 2 IMAX Maximum Output Current.

Innovative PowerTM
- 16 -

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

ACT8938

LOW-NOISE LDO ELECTRICAL CHARACTERISTICS

VINL = 3.6V, COUT4 = COUT5 = 1.5µF, COUT6 = COUT7 = 3.3µF, LOWIQ[ ] = [0], TA = 25°C, unless otherwise specified.

PARAMETER Operating Voltage Range

Output Voltage Accuracy

Line Regulation

Load Regulation

Power Supply Rejection Ratio

Supply Current per Output

Soft-Start Period Power Good Threshold Power Good Hysteresis Output Noise Discharge Resistance REG4 Dropout Voltage Maximum Output Current Limit Stable COUT4 Range REG5 Dropout Voltage Maximum Output Current Limit Stable COUT5 Range REG6 Dropout Voltage Maximum Output Current Limit Stable COUT6 Range REG7 Dropout Voltage Maximum Output Current Limit Stable COUT7 Range

TEST CONDITIONS

VOUT 1.2V, TA = 25°C, IOUT = 10mA VOUT < 1.2V, TA = 25°C, IOUT = 10mA VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [0] VINL = Max VOUT + 0.5V, 3.6V to 5.5V LOWIQ[ ] = [1] IOUT = 1mA to IMAX2 f = 1kHz, IOUT = 20mA, VOUT =1.2V f = 10kHz, IOUT = 20mA, VOUT =1.2V Regulator Enabled, LOWIQ[ ] = [0] Regulator Enabled, LOWIQ[ ] = [1] Regulator Disabled VOUT = 2.9V VOUT Rising VOUT Falling IOUT = 20mA, f = 10Hz to 100kHz, VOUT = 1.2V LDO Disabled, DIS[ ] = 1

IOUT = 80mA, VOUT > 3.1V

VOUT = 95% of regulation voltage

IOUT = 80mA, VOUT > 3.1V

VOUT = 95% of regulation voltage

IOUT = 160mA, VOUT > 3.1V

VOUT = 95% of regulation voltage

IOUT = 160mA, VOUT > 3.1V

VOUT = 95% of regulation voltage

MIN TYP MAX UNIT

VNOM

VNOM
mV/V
75 dB
µVRMS
140 280 mV
140 280 mV
VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section. 2 IMAX Maximum Output Current. 3 Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the regulation voltage for 3.1V output voltage or higher .

LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage.

Innovative PowerTM
- 17 -

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

ACT8938

ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS

VCHGIN = 5.0V, TA = 25°C, unless otherwise specified.

PARAMETER ActivePath CHGIN Operating Voltage Range CHGIN UVLO Threshold CHGIN UVLO Hysteresis CHGIN OVP Threshold CHGIN OVP Hysteresis

CHGIN Supply Current

CHGIN to VSYS On-Resistance

CHGIN to VSYS Current Limit

VSYS REGULATION VSYS Regulated Voltage nSTAT OUTPUT nSTAT Sink current nSTAT Leakage Current ACIN AND CHGLEV INPUTS CHGLEV Logic High Input Voltage CHGLEV Logic Low Input Voltage CHGLEV Leakage Current ACIN Voltage Thresholds ACIN Hysteresis voltage threshold ACIN Leakage Current TH INPUT TH Pull-Up Current VTH Upper Temperature Voltage Threshold VTHH VTH Lower Temperature Voltage Threshold VTHL VTH Hysteresis

TEST CONDITIONS

CHGIN Voltage Rising CHGIN Voltage Falling CHGIN Voltage Rising CHGIN Voltage Falling VCHGIN < VUVLO VCHGIN < VBAT + 50mV, VCHGIN > VUVLO VCHGIN > VBAT + 150mV, VCHGIN > VUVLO Charger disabled, IVSYS = 0mA IVSYS = 100mA ACIN = VSYS ACIN = GA, CHGLEV = GA ACIN = GA, CHGLEV = VSYS

IVSYS = 10mA

VnSTAT = 2V VnSTAT = 4.2V

VCHGLEV = 4.2V ACIN voltage rising ACIN voltage falling VACIN = 4.2V

VCHGIN > VBAT + 100mV, Hysteresis = 50mV Hot Detect NTC Thermistor

Cold Detect NTC Thermistor Upper and Lower Thresholds

MIN TYP MAX UNIT
100 200 µA
400 450 500
12 mA
91 102 110 µA V

Innovative PowerTM
- 18 -

Active-Semi Authorized Recipients and Customers

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

Copyright 2011 Active-Semi, Inc.

ACT8938

ActivePathTM CHARGER ELECTRICAL CHARACTERISTICS CONT’D

VCHGIN = 5.0V, TA = 25°C, unless otherwise specified.

PARAMETER

TEST CONDITIONS

TYP MAX UNIT

Charge Termination Voltage VTERM

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Datasheet ID: EA8938 522757