Texas Instruments' easy-to-use Constant On-time (COT) converter is ideal for scalable automotive power supplies

Texas Instruments' LM5013-Q1 asynchronous step-down converter is designed to be tuned over a wide input voltage range, minimizing the need for external surge suppression components. The LM5013-Q1 is compliant with Automotive AEC-Q100 Class 1 standard and comes in an 8-pin SO PowerPAD package. The 1.27mm pin spacing provides adequate spacing for high pressure applications.

A minimum controllable on-off time of 50 ns helps to achieve a large step-down conversion ratio, enabling direct step-down from 48 V nominal input to the low rail, thereby reducing system complexity and solution cost. If desired, the LM5013-Q1 operates at nearly 100% duty cycle during input voltage dips as low as 6V, making it an excellent choice for high-performance 48V battery automotive applications and MHEV/EV systems.

The LM5013-Q1 features an integrated high voltage side power MOSFETs that deliver up to 3.5A output current. Constant-on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The converter features ultra-low IQ operation to achieve high light load efficiency, innovative peak overcurrent protection, integrated VCC bias power supply and bootup diode, precision enablement and input UVLO, and thermal off protection with automatic recovery. Leak-open PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring.

Features

● Passed AEC-Q100 standard evaluation for automotive application:
-   Ambient operating temperature range 1: -40°C to +125°C
● Functional security: Documentation can be provided to assist in the design of functional security systems
● Designed for reliable and durable applications
-   Wide input voltage range: 6 V to 100 V
-   Junction temperature range: -40°C to +150°C
-   Fixed 3.5ms internal soft start timer
-   Peak current limiting protection
-   Input UVLO and heat off protection
● Optimized for ultra-low EMI requirements: in line with CISPR 25 Class 5 standards
● Suitable for expandable car power supply:
-   Pin-to-pin compatible with LM5163-Q1 and LM5164-Q1 (100V, 0.5A, or 1A)
-   Minimum on-off and off time: 50 ns
-   No-load sleep current: 10 µA
-   Shutdown static current: 3.1µA
● Integration reduces the size and cost of the solution
-   COT mode control architecture
-   Integrated power MOSFET: 100 V, 0.25 Ω
-   Internal voltage reference: 1.2V
-   There is no loop compensation element
-   Internal VCC bias regulator and bootstrap diode

Applications

● Hybrid, electric and powertrain
● Inverter and motor control
● Industrial transportation