Features and Benefits
- Proprietary Low-EMI Buck-Boost Architecture
- Wide Input Range: 4V to 40V
- Synchronous Switching: Up to 98% Efficiency
- ±1.5% Output Voltage Regulation
- Single Output Supports 1 Type-C Port Up to 100W
- Output Channel Enable Function
- Programmable Switching Frequency with External Synchronization and Spread Spectrum
- Overcurrent, Overvoltage, Short-Circuit Protection
- Available in 28-Lead Side Solderable QFN Package
- AEC-Q100 Qualification in Progress
The LT8253/LT8253A are synchronous 4-switch buck-boost controllers optimized for automotive USB-C power delivery. The LT8253/LT8253A are fully compliant to the USB Power Delivery (PD) specification when used in conjunction with a USB Type-C or PD port controller. The output voltage slew rate can be controlled through the FB pin. The LT8253 can deliver up to 100W output power with 98% peak efficiency when running below the AM band. The LT8253A can deliver up to 60W output power with 95% peak efficiency when running above the AM band.
The LT8253/LT8253A support single buck-boost output for 1 Type-C port with power good flag. Over-current, over-voltage, and short-circuit protections are also available.
- Automotive USB-C Power Delivery
- General Purpose Voltage Regulator
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)
Demonstration circuit DC3004A is a 40V 4-SW Buck-Boost Controller configured for automotive USB-C PD charging applications supporting up to 60W output power capability featuring the LT8253. It powers devices connected through the USB-C port at voltages between 3.3V and 21V at up to 3A when VIN is between 9V and 18V. DC3004A will run down to 6VIN with reduced output power capability and can operate through up to 36V input transient conditions. DC3004A runs at 400kHz switching frequency and features spread spectrum frequency modulation (SSFM) for reduced EMI. With SSFM enabled, EMI generated by DC3004A falls below the CISPR 25 Class 5 limits.
The LT8253 has an operating input voltage range of 4V to 40V. It can regulate an output as a boost, a buck, or a 4-switch buck-boost controller. It has an adjustable switching frequency between 150kHz and 650kHz, with an option for external frequency synchronization or ±15% spread spectrum frequency modulation.
DC3004A utilizes Cypress Semiconductor’s CCG3PA USB-C port controller (CYPD3196) to interface between connected USB-C devices and the LT8253 power circuitry in order to comply with the latest USB Type-C and PD standards. This port controller device is powered directly from the INTVCC pin of the LT8253. The CCG3PA facilitates the power contract negotiation between the connected device and DC3004A and adjusts the voltage at the FB divider to set the output voltage accordingly. The LT8253+CCG3PA system monitors input voltage, output voltage and current, and measured temperature on board to help adjust output power capabilities based off measured operation parameters, as well as provide output over-voltage, under-voltage, and over-current protection.
The demo circuit is preloaded with firmware configured to support output power delivery up to 60W using the latest USB PD 3.0 protocol, and offers the following PDO/PPS output configuration options:
- PDO: 5V AT 3A, 9V AT 3A, 15V AT 3A, 20V AT 3A
- PPS: 3.3-11V AT 3A, 3.3-16V AT 3A, 3.3-21V AT 3A
DC3004A firmware is also configured to support legacy charge profiles including BC 1.2, QC 4.0 & 3.0, AFC, and Apple 2.4A charging. Firmware can be updated to support different PDO voltage and power levels. Contact factory apps for support.
The LT8253 datasheet gives a complete description of the part, operation, and applications information. The datasheet must be read in conjunction with this demo manual for DC3004A. The LT8253JUFDM is assembled in a 28-lead plastic side-wettable QFN (UFDM) package with a thermally-enhanced exposed ground pad. Proper board layout is essential for maximum thermal performance. See the datasheet section “PC Board Layout Checklist”.
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.
Sample & Buy
The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.