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notes on regulators

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1 parent 70da275 commit b42c1e11db3de75ec20eb52a37ca700f87ea18ab @rambo rambo committed Mar 17, 2013
Showing with 3 additions and 1 deletion.
  1. +2 −1 hardware/board_rev1/README.md
  2. +1 −0 hardware/board_rev2/README.md
@@ -18,7 +18,8 @@ and XBee) will be brought out to IDC connectors for further use.
* 2 1x16 2.54mm female header (for XMega) http://fi.rsdelivers.com/product/te-connectivity/1-215297-6/16-way-single-row-vertical-gold-skt/5092880.aspx
* 1 2x3 2.54mm female header (ISP stacking) http://fi.rsdelivers.com/product/rs/w3482106trc/3-way-2-row-top-entry-socket-01in-pitch/2518216.aspx
* 1 1x3 2.54mm female header (XMega power connector stacking) http://fi.rsdelivers.com/product/rs/w3481103trc/3way-1-row-top-entry-socket-254mm-pitch/2518187.aspx
- * 1 SOT-223 packaged LDO 3.3V regulator (optional but high-powered one is recommended). **Doublecheck the pinout**: this one is GND-Vin-Vout (LM1117 pinout).
+ * 1 SOT-223 packaged LDO 3.3V regulator (optional but high-powered one is recommended). **Doublecheck the pinout**: this one is GND-Vout-Vin (LM1117 pinout).
+ * This looks like a good choice: http://www.digikey.fi/product-detail/en/ADP3338AKCZ-3.3RL7/ADP3338AKCZ-3.3RL7CT-ND/820438
* 1 MCP73831T LiPo charge controller http://fi.rsdelivers.com/product/microchip/mcp73831t-2dci-ot/charge-controller-li-ion-li-pol/7240599.aspx
* 1 JST battery connector http://fi.rsdelivers.com/product/jst/s2b-ph-sm4-tblfsn/ph-smt-side-entry-shroud-header-2-way/6881353.aspx | http://www.digikey.fi/product-detail/en/S2B-PH-SM4-TB%28LF%29%28SN%29/455-1749-1-ND/926846?cur=USD
* 1 LiPo battery with JST-connector https://www.sparkfun.com/products/8483 or https://www.sparkfun.com/products/8484
@@ -5,3 +5,4 @@
* Design it, remembering to fix bugs of rev1
* Decide on on/off solition, heavily leaning towards: [LTC2954](http://www.digikey.fi/product-detail/en/LTC2954CTS8-2%23TRMPBF/LTC2954CTS8-2%23TRMPBFCT-ND/1232682) with [SI4465ADY](http://www.digikey.fi/product-detail/en/SI4465ADY-T1-E3/SI4465ADY-T1-E3CT-ND/1656942)
* Doublecheck that the 3.3V reg on the XMega board will not throw a hissy fit if we provide 3.3V from the partyboard (with and without 5V to xmega board provided)
+ * In any case [MCP1826T](http://www.digikey.fi/product-detail/en/MCP1826T-3302E%2FDC/MCP1826T-3302E%2FDCCT-ND/1776943) looks like a good choice for regulator (very low drop even at high current) and decent price.

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