We love microchips

- That's why we boil them in acid.

December 21, 2018

Holtek HT7133-1 - 30mA LDO : weekend die-shot

Holtek HT7133-1 is a tiny CMOS LDO able to deliver 30mA. 5-bit fuses on the left side is likely for output voltage trim (3% specified Vout tolerance), some of the voltage customization has to be done via masks. Die size 499x490 µm.



Closer look at fuses:
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December 13, 2018

"Luch" quartz wristwatch IC : weekend die-shot

Inside old (199x) Belorussian wristwatch I've found this IC:


After metalization etch:
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October 11, 2018
September 29, 2018

Ti TPS62321 - 3-MHz Step-Down DCDC : weekend die-shot

Texas Instruments TPS62321 is a 3-MHz Step-Down DCDC converter with internal MOSFET and synchronous rectification.
Look at this staggering number of test pads!
Die size 1983x981 µm.


September 24, 2018

Toshiba 2SC3421 - NPN audio BJT : weekend die-shot

Toshiba 2SC3421 is a 120V 1A NPN BJT for audio applications.
Die size 1053x1055 µm.


September 16, 2018

Microchip MCP6V27 - auto-zero opamp : weekend die-shot

MCP6V27 is a CMOS opamp offering <2 µV input offset voltage. Datasheet have nice description of it's auto-zero operation principle (Page 21+).