MAX20028
Step-Down Controller with Dual 2.1MHz Step-Down DC-DC Converters
Automotive PMIC for Cluster/ADAS Meeting ASIL Specifications
Top
Overview
Features and Benefits
- High-Efficiency Voltage DC-DC Controller Saves Power
- 3.5V to 36V Operating Supply Voltage
- Output Voltage: Pin Selectable, Fixed, or Resistor-Divider Adjustable
- 350kHz to 2.1MHz Operation
- 30µA Quiescent Current with DC-DC Controller Enabled
- Dual 2.1MHz DC-DC Converters with Integrated FETs Saves Space
- OUT2 and OUT3 Are Cascaded from OUT1, Improving Efficiency
- 3A Output Current
- 0.8V to 3.95V Output Voltage
- 25% Lower COUT2 and COUT3 Compared to the MAX16993
- Fixed or Resistor-Divider-Adjustable Output Voltage
- 180° Out-of-Phase Operation
- High Accuracy to Meet ASIL Specification
- ±1% FB Accuracy, ±2% Output-Voltage Accuracy, and ±0.5% OV/UV Accuracy
- Excellent Load-Transient Performance
- Robust for the Automotive Environment
- Current-Mode Architecture with Forced-PWM and Skip Modes of Operations
- Frequency Synchronization Input/Output Reduces System Noise
- Individual Enable Inputs and Active-Low RESET1 Outputs
- Overtemperature and Short-Circuit Protection
- AECQ-100 Qualified
Product Details
The MAX20028 power-management integrated circuit (PMIC) is a 2.1MHz, multichannel, DC-DC converter designed for automotive applications. The device integrates three supplies in a small footprint. The device includes one high-voltage step-down controller (OUT1) designed to run directly from a car battery, and two low-voltage step-down converters (OUT2/OUT3) cascaded from OUT1. Under no-load conditions, the MAX20028 consumes only 30µA of quiescent current, making it ideal for automotive applications.
The high-voltage synchronous step-down DC-DC controller (OUT1) operates from a voltage up to 36V continuous and is protected from load-dump transients up to 42V. There is a pin-selectable frequency option of either 2.1MHz or a factory-set frequency for 1.05MHz, 525kHz, 420kHz, or 350kHz. The low-voltage, synchronous step-down DC-DC converters run directly from OUT1 and can supply output currents up to 3A. The device provides a spread-spectrum enable input (SSEN) to provide quick improvement in electromagnetic interference when needed. There is also a SYNC I/O for providing either an input to synchronize to an external clock source or an output of the internally generated clock (see the Selector Guide for the different options available). The device includes overtemperature shutdown and overcurrent limiting. The device also includes individual active-low RESET1 outputs and individual enable inputs. The individual active-low RESET1 outputs provide voltage monitoring for all output channels. The MAX20028 is available in a 32-pin (5mm x 5mm x 0.75mm) side-wettable TQFN-EP package and is specified for operation over the -40°C to +125°C automotive temperature range.Applications
- Automotive
- Industrial
- ADAS
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
Product Recommendations
MAX20028 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX20028ATJA/VY+ | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028ATJA/VY+T | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028ATJB/VY+ | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028ATJB/VY+T | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028ATJC/VY+ | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028ATJC/VY+T | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028BATJA/VY+ | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| MAX20028BATJA/VY+T | Material Declaration | Reliability Data | 32-LFCSP_SS-5X5X0.75 | |
| Wafer Fabrication Data |
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.