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Integrated, Step-Down Switching Regulators with Selectable Applications Configurations

25A Fully Integrated, Highly Efficient Switching Regulators

Product Details

The MAX38802/MAX38803 are fully-integrated, highly efficient switching regulators for applications operating from 6.5V to 14V input supplies that require up to 25A maximum load. These single-chip regulators provide a compact high-efficiency, power-delivery solution for precision outputs that demand fast transient response.


The two devices have different programmability options (see Tables 3a and 3b for details) to enable a wide range of configurations. The programmable features include: internal/external reference voltage, output voltage setpoint, switching frequency, overcurrent protection level (OCP), and soft-start timing. Discontinuous current mode (DCM) operation can be enabled through pin-strapping to improve light-load efficiency.


The MAX38802/MAX38803 include 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 damage 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 with ±5% and ±8°C accuracy, respectively.


The devices are available in a 27-bump (2.2mm x 3.8mm) WLCSP package that provides low thermal resistance and minimizes the PCB area.

Key Features

  • High-Efficiency Solution
    • Up to 97% Peak
    • Up to 87% Full-Load
    • Up to 96% Light-Load Efficiency at 1A with DCM Enabled
  • Flexible Design Allows Early PCB Definition
    • Footprint Compatible with MAX38800 (9A) and MAX38801 (15A)
    • 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
  • 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
    • 27-Bump WLCSP (2.2mm x 3.8mm) 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/uServers
Parametric specs for Step-Down (Buck) Switching Regulators
VIN (V) (min) 6.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 25
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
Package/Pins WLCSP/27
Budgetary
Price (See Notes)
$2.99 @1k
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Simplified Block Diagram

MAX38802, MAX38803: Basic Application Circuit MAX38802, MAX38803: Basic Application Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX38802 evaluation kit (EV kit) serves as a reference platform for evaluating the MAX38802 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 MAX38802 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 MAX38802. 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.

View Details

Features

  • High-Efficiency Solution
    • Up to 97% Peak
    • Up to 87% at Full Load
    • Up to 96% Light-Load Efficiency at 1A with DCM Enabled
  • Inductor Valley Current Limit is Configured to 16A (R_SEL = R1 = 6.04kΩ)
  • 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
  • 27-Bump WLCSP (2.2mm x 3.8mm) Footprint
  • Operation Using Ceramic Input and Output Capacitors

Description

The MAX38803 evaluation kit (EV kit) serves as a reference platform for evaluating the MAX38803 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 MAX38803 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 MAX38803. 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.

View Details

Features

  • High-Efficiency Solution
    • Up to 97% Peak
    • Up to 87% at Full Load
    • Up to 96% Light Load Efficiency at 1A with DCM Enabled
  • Inductor Valley Current Limit is Configured to 16A (R_SEL = R1 = 6.04kΩ)
  • 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
  • 27-Bump WLCSP (2.2mm x 3.8mm) Footprint
  • Operation Using Ceramic Input and Output Capacitors

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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.

Parameters

Parametric specs for Step-Down (Buck) Switching Regulators
VIN (V) (min) 6.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 25
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
Package/Pins WLCSP/27
Budgetary
Price (See Notes)
$2.99 @1k

Key Features

  • High-Efficiency Solution
    • Up to 97% Peak
    • Up to 87% Full-Load
    • Up to 96% Light-Load Efficiency at 1A with DCM Enabled
  • Flexible Design Allows Early PCB Definition
    • Footprint Compatible with MAX38800 (9A) and MAX38801 (15A)
    • 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
  • 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
    • 27-Bump WLCSP (2.2mm x 3.8mm) 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/uServers

Description

The MAX38802/MAX38803 are fully-integrated, highly efficient switching regulators for applications operating from 6.5V to 14V input supplies that require up to 25A maximum load. These single-chip regulators provide a compact high-efficiency, power-delivery solution for precision outputs that demand fast transient response.


The two devices have different programmability options (see Tables 3a and 3b for details) to enable a wide range of configurations. The programmable features include: internal/external reference voltage, output voltage setpoint, switching frequency, overcurrent protection level (OCP), and soft-start timing. Discontinuous current mode (DCM) operation can be enabled through pin-strapping to improve light-load efficiency.


The MAX38802/MAX38803 include 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 damage 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 with ±5% and ±8°C accuracy, respectively.


The devices are available in a 27-bump (2.2mm x 3.8mm) WLCSP package that provides low thermal resistance and minimizes the PCB area.

Simplified Block Diagram

MAX38802, MAX38803: Basic Application Circuit MAX38802, MAX38803: Basic Application Circuit 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.