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Texas Instruments LM26420-Q1 | Demoboard PMP15023
Automotive Wide-VIN to Point-of-Load Power Supply with Front-End Circuit Protection Reference Design
Overview
| Topology | Buck Converter |
| IC revision | E1 |
Description
This automotive point-of-load power supply reference design features complete front-end protection in a small overall solution size. The system can clamp fast high-voltage electrical transients and maintain operation through these events. It can also properly respond to a reverse battery polarity event and shut down appropriately. This three-output design employs sequencing of two buck regulators to ensure proper power-on and power-down timing, and features an input pi filter to reduce conducted EMI. The design accepts an input voltage of 5 V to 36 V and provides outputs of 3.3 V, 1.2 V, and 1.8 V. This supply is capable of supplying 2 A on the 1.8 V and 1.2-V outputs, while the 3.3-V output simultaneously supplies 3.55 A.
Features
- Complete wide Vin front-end automotive power supply
- Off-battery operation with reverse battery protection
- Positive and negative transient voltage protection
- Auto-sequencing of all three power rails
- Reduced EMI with included pi filter
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Power Inductor, 1 µH, 11.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance1 µH | Performance Rated Current11.4 A | Saturation Current @ 10%14.7 A | Saturation Current @ 30%29 A | DC Resistance10 mΩ | Self Resonant Frequency54 MHz | MountSMT |