MAX38803
Integrated, Step-Down Switching Regulators with Selectable Applications Configurations
25A Fully Integrated, Highly Efficient Switching Regulators
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Key Features
Applications/Uses
| 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 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Integrated, Step-Down Switching Regulators with Selectable Applications Configurations | Oct 19, 2020 |
Support & Training
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Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
| 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 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.
Technical Docs
| Data Sheet | Integrated, Step-Down Switching Regulators with Selectable Applications Configurations | Oct 19, 2020 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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