MAX14570EZT+T

MAX14570EZT+T Datasheet

MAX14570

Part	Datasheet
MAX14570EZT+T	MAX14570EZT+T (pdf)

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MAX14570 EVALUATION KIT AVAILABLE High-Efficiency Voice Coil Motor Driver The MAX14570 is a high-efficiency voice coil motor VCM driver ideal for use in power-sensitive autofocus camera applications. The MAX14570 utilizes a switching output topology to provide high efficiency over the entire input supply voltage range. Optional output slew-rate control and spreadspectrum oscillator reduce conducted noise and radiated emissions. The device features a 0 to 100mA output-current range programmable with 10-bit resolution. A tunable ringing compensation filter significantly improves VCM actuator setting time, speeding up autofocus convergence time and reducing shutter lag. Additional features include on-board diagnostics to detect/ prevent open-/short-circuit conditions and a low-power shutdown mode. The MAX14570 is available in a 0.78mm x 1.35mm x 0.35mm, 6-bump WLP package with 0.4mm pitch. ●● VCM-Based Autofocus Actuator Drives ●● Autofocus Cellular Phone Camera Modules Ordering Information appears at end of data sheet. Benefits and Features ●● Flexible VCM Driver Design • Selectable PWM or Linear Mode Output • High-Efficiency Class-D Output Stage ~80% Efficiency at 60mA Output Current VDD = 2.8V ●● I2C-Adjustable PWM Output Frequency ●● I2C-Adjustable Output Current • 0 to 100mA Range • 97.7uA/LSB • 1 LSB DNL • ±7 LSB INL • ±2% FSR Gain Error • FSR Offset Error ●● High Level of Integration for Performance • Slew-Rate Limiting and Spread-Spectrum Oscillator for Reduced EMI • I2C-Adjustable Output Transition Shaping for Mechanical Ringing Reduction • Open-/Short-Circuit Protection and Diagnostics ●● Low Power Consumption • Low-Power Shutdown Mode 6uA max ●● Minimize PCB Area • 2 x 3 Bump Package, 0.4mm Pitch 0.78mm x 1.35mm x 0.35mm Typical Application Circuit VBAT 0.1µF I2C BUS ISOURCE MAX14570 SDA SCL GND ISINK LVCM RVCM MAX14570 High-Efficiency Voice Coil Motor Driver Absolute Maximum Ratings All voltages referenced to GND to +6.0V ISOURCE, -0.6V to VDD + 0.6V SDA, -0.3V to +6.0V Continuous Current into VDD, Continuous Current into ISOURCE, ISINK........................175mA Continuous Power Dissipation TA = +70°C WLP derate 10.5mW/°C above +70°C ......................570mW Operating Temperature Range........................... -40°C to +85°C Junction Storage Temperature to +150°C Soldering Temperature Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics Note 1 WLP Junction-to-Ambient Thermal Resistance Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to Electrical Characteristics VDD = +2.3V to +5.5V, RVCM = 15Ω, LVCM = 47µH, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +3.6V and TA = +25°C. Note 2 PARAMETER CONDITIONS VDD Supply Voltage VDD Shutdown Supply SCL = GND VDD Standby Current ISTBY I_OUT[9:0] = 0 VDD Active Supply Current I_OUT[9:0] = 1 Thermal Shutdown TSHDN Thermal Shutdown Hysteresis TSHDN_HYS Ordering Information PART TOP MARK TEMP RANGE PINPACKAGE MAX14570EZT+T AA -40°C to +85°C 6 WLP +Denotes a lead Pb -free/RoHS-compliant package. T = Tape and reel. Chip Information PROCESS BiCMOS Package Information For the latest package outline information and land patterns footprints , go to Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. TYPE CODE 6 WLP Z60A1+1 21-0549 LAND PATTERN NO. Refer to Application Note 1891 Maxim Integrated 19 MAX14570 9/11 Initial release High-Efficiency Voice Coil Motor Driver PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2011 Maxim Integrated Products, Inc. 20

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MAX14570

EVALUATION KIT AVAILABLE

High-Efficiency Voice Coil Motor Driver

The MAX14570 is a high-efficiency voice coil motor VCM driver ideal for use in power-sensitive autofocus camera applications.

The MAX14570 utilizes a switching output topology to provide high efficiency over the entire input supply voltage range. Optional output slew-rate control and spreadspectrum oscillator reduce conducted noise and radiated emissions.

The device features a 0 to 100mA output-current range programmable with 10-bit resolution. A tunable ringing compensation filter significantly improves VCM actuator setting time, speeding up autofocus convergence time and reducing shutter lag.

Additional features include on-board diagnostics to detect/ prevent open-/short-circuit conditions and a low-power shutdown mode.

The MAX14570 is available in a 0.78mm x 1.35mm x 0.35mm, 6-bump WLP package with 0.4mm pitch.
●● VCM-Based Autofocus Actuator Drives ●● Autofocus Cellular Phone Camera Modules
Ordering Information appears at end of data sheet.

Benefits and Features
●● Flexible VCM Driver Design
• Selectable PWM or Linear Mode Output
• High-Efficiency Class-D Output Stage ~80% Efficiency at 60mA Output Current VDD = 2.8V
●● I2C-Adjustable PWM Output Frequency
●● I2C-Adjustable Output Current
• 0 to 100mA Range
• 97.7uA/LSB
• 1 LSB DNL
• ±7 LSB INL
• ±2% FSR Gain Error
• FSR Offset Error
●● High Level of Integration for Performance
• Slew-Rate Limiting and Spread-Spectrum Oscillator for Reduced EMI
• I2C-Adjustable Output Transition Shaping for Mechanical Ringing Reduction
• Open-/Short-Circuit Protection and Diagnostics
●● Low Power Consumption
• Low-Power Shutdown Mode 6uA max
●● Minimize PCB Area
• 2 x 3 Bump Package, 0.4mm Pitch 0.78mm x 1.35mm x 0.35mm

Typical Application Circuit

VBAT 0.1µF

I2C BUS

ISOURCE

MAX14570

SDA SCL

GND ISINK

LVCM RVCM

MAX14570

High-Efficiency Voice Coil Motor Driver

Absolute Maximum Ratings

All voltages referenced to GND to +6.0V ISOURCE, -0.6V to VDD + 0.6V SDA, -0.3V to +6.0V Continuous Current into VDD, Continuous Current into ISOURCE, ISINK........................175mA

Continuous Power Dissipation TA = +70°C WLP derate 10.5mW/°C above +70°C ......................570mW

Operating Temperature Range........................... -40°C to +85°C Junction Storage Temperature to +150°C Soldering Temperature

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Package Thermal Characteristics Note 1

WLP Junction-to-Ambient Thermal Resistance

Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to

Electrical Characteristics

VDD = +2.3V to +5.5V, RVCM = 15Ω, LVCM = 47µH, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +3.6V and TA = +25°C. Note 2

PARAMETER

CONDITIONS

VDD Supply Voltage

VDD Shutdown Supply

SCL = GND

VDD Standby Current

ISTBY

I_OUT[9:0] = 0

VDD Active Supply Current

I_OUT[9:0] = 1

Thermal Shutdown

TSHDN

Thermal Shutdown Hysteresis TSHDN_HYS
Ordering Information

PART

TOP MARK

TEMP RANGE

PINPACKAGE

MAX14570EZT+T

AA -40°C to +85°C 6 WLP
+Denotes a lead Pb -free/RoHS-compliant package.

T = Tape and reel.

Chip Information

PROCESS BiCMOS

Package Information

For the latest package outline information and land patterns footprints , go to Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

TYPE

CODE
6 WLP

Z60A1+1 21-0549

LAND PATTERN NO.

Refer to Application Note
1891

Maxim Integrated 19

MAX14570
9/11

Initial release

High-Efficiency Voice Coil Motor Driver

PAGES CHANGED
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2011 Maxim Integrated Products, Inc. 20

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX14570EZT+T Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX14570EZT+T 647224