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TPS82084
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Efficient USB to 3.3V

3 months ago 58
  • Description
  • Documents
  • BOM
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Description

Work in progress - untested circuit created by a hobbyist!

This is a highly efficient USB 4.5V-5.7V to 3.3V max. 2A step-down converter, based on TI TPS82084 8-pin MicroSIP module, with backfeed protection.

According to TI Webench Design Report, this should be 90%+ efficient at 1mA - 10mA output, and 93%+ efficient at 10mA - 1850mA output, over the valid input voltage range.

Documents

Revision 1.0

Revision 2.0

BOM

ID Name Designator Footprint Quantity
1 47k R5 0805 1
2 10k R4 0805 1
3 1x2 P1 PTH-1X2 OUTLINED 1
4 22uF C2,C2 C0805 2
5 DMMT5401-7-F Q1 SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL 1
6 TPS82084 U1 MICROSIP8 1
7 TPS82084 U1 MICROSIP8 1
8 U-E-M7SS-Y-1 USB1,USB1 MICRO-USB-SMD_5P-P0.65-H-F_U-E-M7SS-Y-1 2
9 10uF C1,C1,C3 C0805 3
10 DMG2305UX-7 Q2 SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR 1
11 162k R1,R1 0805 2
12 510k R2 0805 1
13 499k R3,R3 0805 2
14 536k R2 0805 1
15 LD39200PU33R U2 DFN-6_L3.0-W3.0-P0.95-BL-EP 1

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