r5905 - in trunk/gta02-core/bom: . dk research

[werner at docs.openmoko.org]

Author: werner
Date: 2010-04-07 15:47:43 +0200 (Wed, 07 Apr 2010)
New Revision: 5905

Modified:
   trunk/gta02-core/bom/dk/digi-key.equ
   trunk/gta02-core/bom/gta02-core.equ
   trunk/gta02-core/bom/research/STATUS
   trunk/gta02-core/bom/research/u1702
Log:
Found a perfect replacement for the Richtek RT9013-12PB (U1702)

- bom/research/u1702: researched Vdd(alive) current requirements and repeated
  part search for lower current
- bom/research/STATUS: remove the RT9013-12PB
- bom/gta02-core.equ, bom/dk/digi-key.equ: added the STM LD39015M12R as
  replacement for the RICHTEK RT9013-12PB



Modified: trunk/gta02-core/bom/dk/digi-key.equ
===================================================================
--- trunk/gta02-core/bom/dk/digi-key.equ	2010-04-06 19:44:51 UTC (rev 5904)
+++ trunk/gta02-core/bom/dk/digi-key.equ	2010-04-07 13:47:43 UTC (rev 5905)
@@ -126,3 +126,4 @@
 DIGI-KEY 741X083330JPCT-ND		CTS 741X083330JP
 DIGI-KEY A31727CT-ND			TYCO 1734035-2
 DIGI-KEY 350-2065-1-ND			DIALIGHT 598-8320-107F
+DIGI-KEY 497-6872-1-ND			STM LD39015M12R

Modified: trunk/gta02-core/bom/gta02-core.equ
===================================================================
--- trunk/gta02-core/bom/gta02-core.equ	2010-04-06 19:44:51 UTC (rev 5904)
+++ trunk/gta02-core/bom/gta02-core.equ	2010-04-07 13:47:43 UTC (rev 5905)
@@ -37,3 +37,12 @@
 # Same general shape but different footprint and different pin assignment.
 #
 PROCONN SMSN16-J0-2214		AMPHENOL 101-00492-20
+
+#
+#                Package         Vmin    Vdrop   Imax    Iquiet  Caps    Enable
+# RT9013-12PB     SOT-23-5        2.2 V   250 mV  500 mA  25 uA   2 x 1uF H
+# NCP585DSN12T1G  SOT-23-5        1.4 V   ~400 mV 300 mA  80 uA   2 x 1uF H
+# LD39015M12R     SOT-23-5        1.5 V    80 mV  150 mA  38 uA   2 x 1uF H
+#
+
+RICHTEK RT9013-12PB		STM LD39015M12R

Modified: trunk/gta02-core/bom/research/STATUS
===================================================================
--- trunk/gta02-core/bom/research/STATUS	2010-04-06 19:44:51 UTC (rev 5904)
+++ trunk/gta02-core/bom/research/STATUS	2010-04-07 13:47:43 UTC (rev 5905)
@@ -27,7 +27,6 @@
 HT-210UD/NB		led1501		long lead time		X - X ? colors
 IT3205BE		x7601		not found, sub. expens	X - - - -
 R3113D241A-TR-F		u7604		not found yet		X - X - -
-RT9013-12PB		u1702		not found yet		- - 2 - -
 RT9711BPB		u4905		not found yet		- - X - 3
 					(other replacement)	X - X 4 -
 SN74AUP1G00DCKR		u4902		borderline availabil.	X - - - -

Modified: trunk/gta02-core/bom/research/u1702
===================================================================
--- trunk/gta02-core/bom/research/u1702	2010-04-06 19:44:51 UTC (rev 5904)
+++ trunk/gta02-core/bom/research/u1702	2010-04-07 13:47:43 UTC (rev 5905)
@@ -12,6 +12,17 @@
   http://www.onsemi.com/pub_link/Collateral/NCP585-D.PDF
   (note: pin 4 is NC in the RT9013 but "ECO" in the NCP585)
 
-		Package		Vmin	Vdrop	Imax	Caps	Enable
-RT9013-12PB	SOT-23-5	2.2 V	250 mV	500 mA	2 x 1uF	H
-NCP585DSN12T1G	SOT-23-5	1.4 V	~400 mV	300 mA	2 x 1uF	H
+- ST Microelectronics LD39015M12R
+  http://www.st.com/stonline/books/pdf/docs/14003.pdf
+  (perfect replacement)
+
+		Package		Vmin	Vdrop	Imax	Iquiet	Caps	Enable
+RT9013-12PB	SOT-23-5	2.2 V	250 mV	500 mA	25 uA	2 x 1uF	H
+NCP585DSN12T1G	SOT-23-5	1.4 V	~400 mV	300 mA	80 uA	2 x 1uF	H
+LD39015M12R	SOT-23-5	1.5 V	 80 mV	150 mA	38 uA	2 x 1uF	H
+
+
+Samsung's Power Design Guide, Rev. 1.1, specifies Vdd(alive) to be
+1.5 mA in NORMAL or IDLE mode, without indicating whether this is a
+typical or maximum value. In any case, U1702 doesn't have to deliver
+more than a few mA.