Add LDO voltage regulator to step down from 5V (Host/USB) to 3V3.

hardware/libraries/elabdev.dcm

@@ -1,5 +1,11 @@
 EESchema-DOCLIB  Version 2.0
 #
+$CMP ATECC608A
+D Elliptic Curve Crypto Authenticator
+K Cryptography Authentication ECDSA FIPS186-3 ECDH FIPSSP800-56A I2C
+F https://www.microchip.com/wwwproducts/ATECC608A/
+$ENDCMP
+#
 $CMP ATSAMR34
 D SAM R34/R35 Low Power LoRa Sub-GHz System-in-Package (SiP), Cortex-M0+ core, 256kB Flash, 40 KB RAM, 6x6mm TFBGA-64
 K Atmel UHF Transceiver Microcontroller
@@ -29,6 +35,12 @@ D Solder Area
 K sf solder feld
 $ENDCMP
 #
+$CMP TPS73533DRV
+D 3.3V 500mA, Low Quiescent Current, Low Noise, High PSRR, Low-Dropout Linear Regulator, WSON-6
+K ldo voltage regulator 500mA
+F https://www.ti.com/lit/ds/symlink/tps735.pdf
+$ENDCMP
+#
 $CMP TYETBCSANF
 D 32MHz TCXO Clipped Sine Wave Oscillator
 K Crystal Clock Oscillator
@@ -40,10 +52,4 @@ D USB Type C Hole
 K usb hole
 $ENDCMP
 #
-$CMP ATECC608A
-D Elliptic Curve Crypto Authenticator
-K Cryptography Authentication ECDSA FIPS186-3 ECDH FIPSSP800-56A I2C
-F https://www.microchip.com/wwwproducts/ATECC608A/
-$ENDCMP
-#
 #End Doc Library

hardware/libraries/elabdev.lib

@@ -1,6 +1,31 @@
 EESchema-LIBRARY Version 2.4
 #encoding utf-8
 #
+# ATECC608A
+#
+DEF ATECC608A U 0 30 Y Y 1 F N
+F0 "U" -275 425 50 H V C CNN
+F1 "ATECC608A" 0 0 50 H V C CNN
+F2 "Housings_DFN_QFN:DFN-8-1EP_2x3mm_Pitch0.5mm" 0 700 50 H I C CNN
+F3 "http://ww1.microchip.com/downloads/en/DeviceDoc/20005927A.pdf" 0 600 50 H V C CNN
+ALIAS ATECC608A-MAHDA-S ATECC608A-SSHDA-T ATECC508A-MAHDA-S ATECC508A-SSHDA-T
+$FPLIST
+ DFN-8-*2x3mm_Pitch0.5mm*
+ SOIC-8*3.9x4.9mm_Pitch1.27mm*
+$ENDFPLIST
+DRAW
+S -350 350 350 -350 0 1 10 f
+X NC 1 -500 300 150 R 50 50 1 1 N N
+X NC 2 -500 100 150 R 50 50 1 1 N N
+X NC 3 -500 -100 150 R 50 50 1 1 N N
+X GND 4 0 -500 150 U 50 50 1 1 W
+X SDA 5 500 -200 150 L 50 50 1 1 B
+X SCL 6 500 200 150 L 50 50 1 1 I
+X NC 7 -500 -300 150 R 50 50 1 1 N N
+X VCC 8 0 500 150 D 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 # ATSAMR34
 #
 DEF ATSAMR34 U 0 40 Y Y 1 F N
@@ -207,6 +232,28 @@ S 200 150 200 -150 0 1 0 N
 ENDDRAW
 ENDDEF
 #
+# TPS73533DRV
+#
+DEF TPS73533DRV U 0 40 Y Y 1 F N
+F0 "U" 300 250 50 H V C CNN
+F1 "TPS73533DRV" -50 250 50 H V C CNN
+F2 "Package_SON:Texas_PWSON-N6" -800 600 50 H I C CNN
+F3 "" -800 600 50 H I C CNN
+$FPLIST
+ Texas*S*PWSON*N*
+$ENDFPLIST
+DRAW
+S -300 200 300 -200 0 1 0 f
+X OUT 1 400 100 100 L 50 50 0 0 w
+X NR 2 400 0 100 L 50 50 0 0 P
+X GND 3 400 -100 100 L 50 50 0 0 W
+X EN 4 -400 -100 100 R 50 50 0 0 I
+X NC 5 -400 0 100 R 50 50 0 0 N N
+X IN 6 -400 100 100 R 50 50 0 0 W
+X GND 7 0 -300 100 U 50 50 0 0 W
+ENDDRAW
+ENDDEF
+#
 # TYETBCSANF
 #
 DEF TYETBCSANF XC 0 10 Y Y 1 F N
@@ -239,29 +286,4 @@ S -250 100 250 -100 0 1 0 N
 ENDDRAW
 ENDDEF
 #
-# ATECC608A
-#
-DEF ATECC608A U 0 30 Y Y 1 F N
-F0 "U" -275 425 50 H V C CNN
-F1 "ATECC608A" 0 0 50 H V C CNN
-F2 "Housings_DFN_QFN:DFN-8-1EP_2x3mm_Pitch0.5mm" 0 700 50 H I C CNN
-F3 "http://ww1.microchip.com/downloads/en/DeviceDoc/20005927A.pdf" 0 600 50 H V C CNN
-ALIAS ATECC608A-MAHDA-S ATECC608A-SSHDA-T  ATECC508A-MAHDA-S ATECC508A-SSHDA-T
-$FPLIST
- DFN-8-*2x3mm_Pitch0.5mm*
- SOIC-8*3.9x4.9mm_Pitch1.27mm*
-$ENDFPLIST
-DRAW
-S -350 350 350 -350 0 1 10 f
-X NC 1 -500 300 150 R 50 50 1 1 N N
-X NC 2 -500 100 150 R 50 50 1 1 N N
-X NC 3 -500 -100 150 R 50 50 1 1 N N
-X GND 4 0 -500 150 U 50 50 1 1 W
-X SDA 5 500 -200 150 L 50 50 1 1 B
-X SCL 6 500 200 150 L 50 50 1 1 I
-X NC 7 -500 -300 150 R 50 50 1 1 N N
-X VCC 8 0 500 150 D 50 50 1 1 W
-ENDDRAW
-ENDDEF
-#
 #End Library