MAX20029B
Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters
Four Integrated Power Rails and High Operating Frequency Minimize Solution Size for Multirail Point-of-Load Regulation
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
The MAX20029/MAX20029B/MAX20029C/MAX20029D power-management ICs (PMICs) integrate four low-voltage, high-efficiency, step-down DC-DC converters. Each of the four outputs is factory or resistor programmable between 1V to 4.0V (MAX20029/MAX20029B) or 0.7V to 3.8V (MAX20029C/MAX20029D). The MAX20029/ MAX20029C has two 0.5A/1A/1.5A channels and two 0.5A/1.5A channels, while the MAX20029B/MAX20029D has two 0.5A/1.5A channels and by combining channels 1 and 2, a single 2A/3A channel. The PMICs operate from 3.0V to 5.5V, making them ideal for automotive point-off-load and post-regulation applications.
The PMICs feature fixed-frequency PWM-mode operation with a switching frequency of 2.2MHz. High-frequency operation allows for an all-ceramic capacitor design and small-size external components. The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Internal current sensing and loop compensation reduce board space and system cost.
The PMICs offer a spread-spectrum option to reduce radiated emissions. Two of the four buck converters operate 180° out-of-phase with the internal clock. This feature reduces the necessary input capacitance and improves EMI as well. All four buck converters operate in constant PWM mode outside the AM band. The PMICs offer a SYNC input to synchronize to an external clock.
The PMICs provide individual enable inputs and power-good/reset outputs, as well as factory-programmable PG times.
The PMICs offer several important protection features including: input overvoltage protection, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown.
The MAX20029/MAX20029B/MAX20029C//MAX20029D PMICs are available in a 28-pin TQFN package with an exposed pad and are specified for operation over the -40°C to +125°C automotive temperature range.
Key Features
- Quad Step-Down DC-DC Converters with Integrated FETs
- Operate from 3.0V to 5.5V Supply Voltage
- 0.7V to 4.0V Fixed or Adjustable Output Voltage
- 2.2MHz Switching Frequency
- MAX20029/MAX20029C: Up to Four 1.5A Channels
- MAX20029B/MAX20029D: Up to One 3A + Two 1.5A Channels
- Designed to Improve Automotive EMI Performance
- Forced-PWM Operation
- Two Channels 180° Out-of-Phase
- SYNC Input
- Spread-Spectrum Option
- Soft-Start and Supply Sequencing Reduces Inrush Current
- Individual Enable Inputs and Power-Good Outputs to Simplify Sequencing
- OV Input-Voltage Monitoring
- Overtemperature and Short-Circuit Protection
- 28-Pin (5mm × 5mm x 0.8mm) TQFN-EP Package
- -40°C to +125°C Operating Temperature Range
Applications/Uses
- Automotive
- Industrial
| VIN (V) (min) | 3 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 1 |
| VOUT1 (V) (max) | 4 |
| IOUT1 (A) (max) | 3 |
| Switch Type | Internal |
| Preset VOUT (V) | 100mV steps |
| Output Adjust. Method | Preset Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 3 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/28 |
| Budgetary Price (See Notes) | $1.37 @1k |
Technical Docs
| Data Sheet | Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters | Nov 02, 2020 |
Click any title below to view the detail page where available.
Description
The MAX20029B EV kit is a fully assembled and tested PCB that demonstrates the capabilities of the MAX20029B power-management IC (PMIC), which comprises four low-voltage step-down converters. The IC operates at a 3V to 5.5V input supply voltage, regulates to a 1V to 4V voltage range, and delivers up to 3A of current, while OUT3 and and OUT4 deliver up to 1.5A. The converters are high-frequency switchers, operating at 2.2MHz. The high switching frequency allows for reduced component values and sizes, including a single ceramic output capacitor on each rail. All channels have independent undervoltage/overvoltage comparators at both input and output, current limiting, and fault-flag outputs. The EV kit ships fully assembled and tested, ready for immediate evaluation of the IC.
View DetailsFeatures
- 3.0V to 5.5V Input Voltage Range
- 1.0V to 4.0V Output Voltage Range
- Resistive Dividers Used to Set Appropriate Output Voltage
- High Switching Frequency of 2.2MHz
- Two Channels Operate 180° Out-of-Phase
- Individual Enable and Reset Connections Available
- Loop Measurements Ready on All Channels
- Overtemperature and Short-Circuit Protection
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX20029 EV kit is a fully assembled and tested PCB that demonstrates the capabilities of the MAX20029 power-management IC (PMIC), which comprises four low-voltage step-down converters. The IC operates at a 3V to 5.5V input supply voltage, regulates to a 1V to 4V voltage range, and delivers up to 1.5A of current at each of its outputs. The converters are high-frequency switchers, operating at 2.2MHz. The high switching frequency allows for reduced component values and sizes, including a single ceramic output capacitor on each rail. All channels have independent undervoltage/overvoltage comparators at both input and output, current limiting, and fault-flag outputs. The EV kit ships fully assembled and tested, ready for immediate evaluation of the IC.
View DetailsFeatures
- 3.0V to 5.5V Input Voltage Range
- 1.0V to 4.0V Output Voltages Range
- Resistive Dividers Used to Set Appropriate Output Voltage
- High Switching Frequency of 2.2MHz
- Two Channels Operate 180° Out-of-Phase
- Individual Enable and Reset Connections Available
- Loop Measurements Ready on All Channels
- Overtemperature and Short-Circuit Protection
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX20029 EV kit is a fully assembled and tested PCB that demonstrates the capabilities of the MAX20029 power-management IC (PMIC), which comprises four low-voltage step-down converters. The IC operates at a 3V to 5.5V input supply voltage, regulates to a 1V to 4V voltage range, and delivers up to 1.5A of current at each of its outputs. The converters are high-frequency switchers, operating at 2.2MHz. The high switching frequency allows for reduced component values and sizes, including a single ceramic output capacitor on each rail. All channels have independent undervoltage/overvoltage comparators at both input and output, current limiting, and fault-flag outputs. The EV kit ships fully assembled and tested, ready for immediate evaluation of the IC.
View DetailsFeatures
- 3.0V to 5.5V Input Voltage Range
- 1.0V to 4.0V Output Voltages Range
- Resistive Dividers Used to Set Appropriate Output Voltage
- High Switching Frequency of 2.2MHz
- Two Channels Operate 180° Out-of-Phase
- Individual Enable and Reset Connections Available
- Loop Measurements Ready on All Channels
- Overtemperature and Short-Circuit Protection
- Proven PCB Layout
- Fully Assembled and Tested
 | Tools & Models EE-Sim: Design & Simulate MAX20029B | Create Design |
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
Parameters
| VIN (V) (min) | 3 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 1 |
| VOUT1 (V) (max) | 4 |
| IOUT1 (A) (max) | 3 |
| Switch Type | Internal |
| Preset VOUT (V) | 100mV steps |
| Output Adjust. Method | Preset Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 3 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/28 |
| Budgetary Price (See Notes) | $1.37 @1k |
Key Features
- Quad Step-Down DC-DC Converters with Integrated FETs
- Operate from 3.0V to 5.5V Supply Voltage
- 0.7V to 4.0V Fixed or Adjustable Output Voltage
- 2.2MHz Switching Frequency
- MAX20029/MAX20029C: Up to Four 1.5A Channels
- MAX20029B/MAX20029D: Up to One 3A + Two 1.5A Channels
- Designed to Improve Automotive EMI Performance
- Forced-PWM Operation
- Two Channels 180° Out-of-Phase
- SYNC Input
- Spread-Spectrum Option
- Soft-Start and Supply Sequencing Reduces Inrush Current
- Individual Enable Inputs and Power-Good Outputs to Simplify Sequencing
- OV Input-Voltage Monitoring
- Overtemperature and Short-Circuit Protection
- 28-Pin (5mm × 5mm x 0.8mm) TQFN-EP Package
- -40°C to +125°C Operating Temperature Range
Applications/Uses
- Automotive
- Industrial
Description
The MAX20029/MAX20029B/MAX20029C/MAX20029D power-management ICs (PMICs) integrate four low-voltage, high-efficiency, step-down DC-DC converters. Each of the four outputs is factory or resistor programmable between 1V to 4.0V (MAX20029/MAX20029B) or 0.7V to 3.8V (MAX20029C/MAX20029D). The MAX20029/ MAX20029C has two 0.5A/1A/1.5A channels and two 0.5A/1.5A channels, while the MAX20029B/MAX20029D has two 0.5A/1.5A channels and by combining channels 1 and 2, a single 2A/3A channel. The PMICs operate from 3.0V to 5.5V, making them ideal for automotive point-off-load and post-regulation applications.
The PMICs feature fixed-frequency PWM-mode operation with a switching frequency of 2.2MHz. High-frequency operation allows for an all-ceramic capacitor design and small-size external components. The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Internal current sensing and loop compensation reduce board space and system cost.
The PMICs offer a spread-spectrum option to reduce radiated emissions. Two of the four buck converters operate 180° out-of-phase with the internal clock. This feature reduces the necessary input capacitance and improves EMI as well. All four buck converters operate in constant PWM mode outside the AM band. The PMICs offer a SYNC input to synchronize to an external clock.
The PMICs provide individual enable inputs and power-good/reset outputs, as well as factory-programmable PG times.
The PMICs offer several important protection features including: input overvoltage protection, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown.
The MAX20029/MAX20029B/MAX20029C//MAX20029D PMICs are available in a 28-pin TQFN package with an exposed pad and are specified for operation over the -40°C to +125°C automotive temperature range.
Technical Docs
| Data Sheet | Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters | Nov 02, 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
Request a Quote