PMP9398: 3.3V @ 2A, 4.5 ~ 60V in, Buck

Summary

The PMP9398 reference design is a conducted EMI optimized 6.6W power supply design for automotive application. It features the SIMPLE SWITCHER® LM46002 synchronous buck regulator and provides a 3.3V, max 2A output. The input voltage range is 4.5V to 60V suitable for 12V automotive battery supply.

The reference design has the input EMI filter stage, and the conducted EMI is tested under the CISPR 25 automotive EMC standard. The design is compliant with the Class 5 conducted emissions standard.

Specifications

Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
Current Out 2 A
Voltage In 4.5 ~ 60 V
Efficiency @ Conditions >85%, 13V in, 3.3V @ 0.15 ~ 1.9 A
>80%, 4.5V in, 3.3V @ 0 ~ 1.9 A
>70%, 60V in, 3.3V @ 0 ~ 1.7 A
Voltage Out Range 1 ~ 28 V
Features Current Limit (Adj. or Fixed)
Power Good Output
Pre-Biased Startup
Short Circuit Protection
Shutdown, Enable, Standby
Soft Start
Synchronizable
Thermal Protection
Voltage Tracking
Switching Frequency 500 kHz
Standby Current [Typical] 2.3 µA
Quiescent Current [Typical] 7 µA
Component Count + Extras 36 + 10
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Automotive
Point of Load (PoL)
Power: Auxiliary Power Supply
Power: Industrial Power
Telecom
Standby Current [Maximum] 5 µA
Quiescent Current [Maximum] 12 µA
Main I.C. Base Part LM46002
Date Created By Author 2014-04
Date Added To Library 2015-01

Support Documents & Media

PMP9398 - User Guide LM46002 - Datasheet

Media

PMP9398_Schematic_Full.png PMP9398_Board_1_Full.jpg PMP9398_Board_2_Full.jpg PMP9398_Chart_1_Full.png PMP9398_Chart_2_Full.png PMP9398_Chart_3_Full.png PMP9398_Chart_4_Full.png