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Integrated, Step-Down Switching Regulator with Selectable Applications Configurations

9A Fully Integrated, Highly Efficient Switching Regulator

Product Details

The MAX38800 is a fully integrated, highly efficient switching regulator for applications operating from 6.5V to 14V input supplies that require up to 9A maximum load. This single-chip regulator provides compact high-efficiency power delivery for precision outputs that demand fast transient response.

The device has different programmability options to enable a wide range of configurations. The programmable features include: internal/external reference voltage, output voltage set-point, switching frequency, overcurrent protection level (OCP), and soft-start timing. Discontinuous current mode (DCM) operation can be enabled using pinstrapping to improve light-load efficiency.

The MAX38800 includes multiple protection and measurement features. Positive and negative cycle-by-cycle OCP, short-circuit protection and overtemperature protection (OTP) ensure robust design. Input undervoltage and overvoltage lockout shut down the regulator to prevent damages when the input voltage is out of specification. Regulation is halted in case of an output overvoltage (OVP) event. A status pin indicates that the output voltage is within range and the output voltage is in regulation. The device has an analog output that can be configured to report output current or junction temperature.

The device is available in a 19-bump (2.2mm x 2.8mm) WLCSP package that provides low thermal resistance and minimizes the printed circuit board area.

Key Features

  • High-Efficiency Solution
    • Up to 96% Peak
    • Up to 95.5% Full Load
    • Up to 94% Light-Load Efficiency at 1A with DCM Enabled
  • Flexible Design Allows Early PCB Definition
    • Footprint Compatible with MAX38801 (15A) and MAX38802/MAX38803 (25A)
    • Programmable Switching Frequency up to 1MHz
    • Programmable Soft-Start and STAT Delay Timings
    • Programmable Reference Voltage with External Input Option
    • Programmable Positive and Negative OCP Limit
    • Supports Current Sourcing and Sinking
  • Advanced Architecture, Protection and Reporting Guarantees Reliable Designs
    • Analog Current or Temperature Reporting
    • Differential Remote Sense with Open-Circuit Detection
    • Fast Transient Response with Quick-PWM™ Architecture
    • Percentage-Based Output Power Good and OVP
    • Open-Drain Status Indicator (STAT) Pin
    • Input Undervoltage and Overvoltage Lockout
    • Adaptive Dead-Time Control
  • Saves Board Space
    • Integrated Boost Switch
    • 19-Bump WLCSP (2.2mm x 2.8mm) Footprint
    • Operation Using Ceramic Input and Output Capacitors

Applications/Uses

  • DDR Memory: VDDQ, VPP and VTT
  • GPU Core Supply
  • I/O and Chipset Supplies
  • Point-of-Load (POL) applications
  • Servers/μServers
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 6.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 9
Switch Type Internal
Preset VOUT (V) 1
Output Adjust. Method Dyn. REF In
Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 800
900
400
500
600
700
Design Tools EE-Sim
Package/Pins WLCSP/19
Budgetary
Price (See Notes)
$2.77 @1k
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Simplified Block Diagram

MAX38800: Functional (or Block) Diagram MAX38800: Functional (or Block) Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX38800 evaluation kit (EV kit) serves as a reference platform for evaluating the MAX38800 voltage regulator IC. This single-chip, integrated switching regulator provides an extremely compact, highly efficient, fast, accurate and reliable power delivery solution for low-output voltage applications. The MAX38800 has different programmability options to enable a wide range of configurations.

The EV kit consists of a fully-assembled and tested Printed Circuit Board (PCB) implementation of the MAX38800. Jumpers, test points, and input/output connectors are included for flexibility and ease-of-use. Refer to the data sheet for ordering information and more details.

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Features

  • High-Efficiency Solution
    • Up to 96% Peak
    • Up to 95.5% Full-Load
    • Up to 94% Light-Load Efficiency at 1A with DCM Enabled
  • Inductor valley current limit is Configured to 7.5A (R_SEL = R1 = 2.67kΩ)
  • Programmable Switching Frequency from 400kHz to 900kHz
  • Programmable Positive and Negative OCP Limit
  • Programmable Reference Voltage with External Input Option
  • Fast Transient Response with Quick PWM™ Architecture
  • Differential Remote Sense with Open-Circuit Detection
  • Percentage-Based Output Power Good and OVP
  • Open-Drain Status Indicator (STAT) Pin
  • Input Undervoltage and Overvoltage Lockout
  • Adaptive Dead Time Control
  • Integrated Boost Switch
  • 19-Bump WLCSP (2.2mm x 2.8mm) Footprint
  • Operation Using Ceramic Input and Output Capacitors

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Tools & Models

EE-Sim: Design & Simulate MAX38800

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 6.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 9
Switch Type Internal
Preset VOUT (V) 1
Output Adjust. Method Dyn. REF In
Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 800
900
400
500
600
700
Design Tools EE-Sim
Package/Pins WLCSP/19
Budgetary
Price (See Notes)
$2.77 @1k

Key Features

  • High-Efficiency Solution
    • Up to 96% Peak
    • Up to 95.5% Full Load
    • Up to 94% Light-Load Efficiency at 1A with DCM Enabled
  • Flexible Design Allows Early PCB Definition
    • Footprint Compatible with MAX38801 (15A) and MAX38802/MAX38803 (25A)
    • Programmable Switching Frequency up to 1MHz
    • Programmable Soft-Start and STAT Delay Timings
    • Programmable Reference Voltage with External Input Option
    • Programmable Positive and Negative OCP Limit
    • Supports Current Sourcing and Sinking
  • Advanced Architecture, Protection and Reporting Guarantees Reliable Designs
    • Analog Current or Temperature Reporting
    • Differential Remote Sense with Open-Circuit Detection
    • Fast Transient Response with Quick-PWM™ Architecture
    • Percentage-Based Output Power Good and OVP
    • Open-Drain Status Indicator (STAT) Pin
    • Input Undervoltage and Overvoltage Lockout
    • Adaptive Dead-Time Control
  • Saves Board Space
    • Integrated Boost Switch
    • 19-Bump WLCSP (2.2mm x 2.8mm) Footprint
    • Operation Using Ceramic Input and Output Capacitors

Applications/Uses

  • DDR Memory: VDDQ, VPP and VTT
  • GPU Core Supply
  • I/O and Chipset Supplies
  • Point-of-Load (POL) applications
  • Servers/μServers

Description

The MAX38800 is a fully integrated, highly efficient switching regulator for applications operating from 6.5V to 14V input supplies that require up to 9A maximum load. This single-chip regulator provides compact high-efficiency power delivery for precision outputs that demand fast transient response.

The device has different programmability options to enable a wide range of configurations. The programmable features include: internal/external reference voltage, output voltage set-point, switching frequency, overcurrent protection level (OCP), and soft-start timing. Discontinuous current mode (DCM) operation can be enabled using pinstrapping to improve light-load efficiency.

The MAX38800 includes multiple protection and measurement features. Positive and negative cycle-by-cycle OCP, short-circuit protection and overtemperature protection (OTP) ensure robust design. Input undervoltage and overvoltage lockout shut down the regulator to prevent damages when the input voltage is out of specification. Regulation is halted in case of an output overvoltage (OVP) event. A status pin indicates that the output voltage is within range and the output voltage is in regulation. The device has an analog output that can be configured to report output current or junction temperature.

The device is available in a 19-bump (2.2mm x 2.8mm) WLCSP package that provides low thermal resistance and minimizes the printed circuit board area.

Simplified Block Diagram

MAX38800: Functional (or Block) Diagram MAX38800: Functional (or Block) Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal