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MAX17024
Single Quick-PWM Step-Down Controller with Dynamic REFIN
High Efficiency, Excellent Transient Response, and High DC-Output Accuracy Needed for Stepping Down High Voltages
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The MAX17024 pulse-width modulation (PWM) controller provides high efficiency, excellent transient response, and high DC-output accuracy needed for stepping down high-voltage batteries to generate low-voltage core or chipset/RAM bias supplies in notebook computers. The output voltage can be controlled using the dynamic REFIN, which supports input voltages between 0 to 2V. The REFIN adjustability combined with a resistive voltage-divider on the feedback input allows the MAX17024 to be configured for any output voltage between 0 to 0.9 x VIN.
Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios (low-duty-cycle applications) with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. Strong drivers allow the MAX17024 to efficiently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resistor series with the synchronous rectifier to achieve highly accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start and soft-shutdown to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The controller also includes output undervoltage and thermal-fault protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm TDFN package. For space-constrained applications, refer to the MAX17016 single step-down with 26V internal MOSFETs capable of supporting 10A continuous load. The MAX17016 is available in a small 40-pin, 6mm x 6mm TQFN package.
Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios (low-duty-cycle applications) with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. Strong drivers allow the MAX17024 to efficiently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resistor series with the synchronous rectifier to achieve highly accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start and soft-shutdown to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The controller also includes output undervoltage and thermal-fault protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm TDFN package. For space-constrained applications, refer to the MAX17016 single step-down with 26V internal MOSFETs capable of supporting 10A continuous load. The MAX17016 is available in a small 40-pin, 6mm x 6mm TQFN package.
Key Features
- Quick-PWM with Fast Transient Response
- Supports Any Output Capacitor
- No Compensation Required with Polymers/Tantalum
- Stable with Ceramic Output Capacitors Using External Compensation
- Precision 2V ±10mV Reference
- Dynamically Adjustable Output Voltage (0 to 0.9 x VIN Range)
- Feedback Input Regulates to 0 to 2V REFIN Voltage
- 0.5% VOUT Accuracy Over Line and Load
- 26V Maximum Input Voltage Rating
- Resistively Programmable Switching Frequency
- Undervoltage/Thermal Protection
- Voltage Soft-Start and Soft-Shutdown
- Monotonic Power-Up with Precharged Output
- Power-Good Window Comparator
Applications/Uses
- DDR Memory-VDDQ or VTT
- GPU Core Supply
- I/O and Chipset Supplies
- Notebook Computers
- Point-of-Load Applications
- Step-Down Power Supply
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 2 |
| VIN (V) (max) | 26 |
| VOUT1 (V) (min) | 0 |
| VOUT1 (V) (max) | 23 |
| IOUT1 (A) (max) | 10 |
| Switch Type | External |
| Output Adjust. Method | Dyn. REF In Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 600 |
| Package/Pins | TDFN/14 |
| Budgetary Price (See Notes) | $1.52 @1k |
View More
Technical Docs
| Data Sheet | Single Quick-PWM Step-Down Controller with Dynamic REFIN | Sep 12, 2019 |
Click any title below to view the detail page where available.
Description
The MAX17024 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that demonstrates the typical 10A application circuit of theMAX17024. The MAX17024 is a DC-DC converter that steps down high-voltage batteries to generate low-voltage core, chipset, or memory bias supplies in notebook computers.
The MAX17024 EV kit provides a dynamically adjustable 1.5V/1.05V output voltage from a 7V to 24V battery input range. It delivers up to 10A output current while achieving greater than 92% efficiency. Programmed by a single resistor, the EV kit operates at 300kHz switching frequency and has superior line- and load-transient response. The EV kit also allows the evaluation of other dynamically adjustable output voltages by varying the external reference input, which can be realized by changing resistors R1, R2, and R3.
Features
- 7V to 24V Input Range
- Quick-PWM with Fast Transient Response
- Dynamically Selectable 1.5V/1.05V Output Voltage
- Dynamically Adjustable Output Voltage (0 to 0.9VIN Range)
- 10A Output Current
- 92% Efficiency (VIN = 12V, VOUT = 1.5V at 5A)
- 300kHz Switching Frequency
- Power-Good Output Indicator (PGOOD)
- Low-Profile Surface-Mount Components
- Fully Assembled and Tested
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Parameters
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 2 |
| VIN (V) (max) | 26 |
| VOUT1 (V) (min) | 0 |
| VOUT1 (V) (max) | 23 |
| IOUT1 (A) (max) | 10 |
| Switch Type | External |
| Output Adjust. Method | Dyn. REF In Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 600 |
| Package/Pins | TDFN/14 |
| Budgetary Price (See Notes) | $1.52 @1k |
Key Features
- Quick-PWM with Fast Transient Response
- Supports Any Output Capacitor
- No Compensation Required with Polymers/Tantalum
- Stable with Ceramic Output Capacitors Using External Compensation
- Precision 2V ±10mV Reference
- Dynamically Adjustable Output Voltage (0 to 0.9 x VIN Range)
- Feedback Input Regulates to 0 to 2V REFIN Voltage
- 0.5% VOUT Accuracy Over Line and Load
- 26V Maximum Input Voltage Rating
- Resistively Programmable Switching Frequency
- Undervoltage/Thermal Protection
- Voltage Soft-Start and Soft-Shutdown
- Monotonic Power-Up with Precharged Output
- Power-Good Window Comparator
Applications/Uses
- DDR Memory-VDDQ or VTT
- GPU Core Supply
- I/O and Chipset Supplies
- Notebook Computers
- Point-of-Load Applications
- Step-Down Power Supply
Description
The MAX17024 pulse-width modulation (PWM) controller provides high efficiency, excellent transient response, and high DC-output accuracy needed for stepping down high-voltage batteries to generate low-voltage core or chipset/RAM bias supplies in notebook computers. The output voltage can be controlled using the dynamic REFIN, which supports input voltages between 0 to 2V. The REFIN adjustability combined with a resistive voltage-divider on the feedback input allows the MAX17024 to be configured for any output voltage between 0 to 0.9 x VIN.
Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios (low-duty-cycle applications) with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. Strong drivers allow the MAX17024 to efficiently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resistor series with the synchronous rectifier to achieve highly accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start and soft-shutdown to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The controller also includes output undervoltage and thermal-fault protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm TDFN package. For space-constrained applications, refer to the MAX17016 single step-down with 26V internal MOSFETs capable of supporting 10A continuous load. The MAX17016 is available in a small 40-pin, 6mm x 6mm TQFN package.
Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios (low-duty-cycle applications) with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. Strong drivers allow the MAX17024 to efficiently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resistor series with the synchronous rectifier to achieve highly accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start and soft-shutdown to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The controller also includes output undervoltage and thermal-fault protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm TDFN package. For space-constrained applications, refer to the MAX17016 single step-down with 26V internal MOSFETs capable of supporting 10A continuous load. The MAX17016 is available in a small 40-pin, 6mm x 6mm TQFN package.
Technical Docs
| Data Sheet | Single Quick-PWM Step-Down Controller with Dynamic REFIN | Sep 12, 2019 |
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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