PS3 4004 MSX-001 identyfikacja elementu

Witam
mam prośbę do forumowiczów o identyfikację elementu jak w załączniku.

To co udało mi się ustalic to regulator napięcia 1.8V ale nie umiem znaleść takiego elementu,
wiec moze komuś się uda rozpoznać , byłbym wdzięczny.

Pozdrawiam.

Hello!

It is switching controller chip for 1.8V WiFi module power supply. This chip goes bad very often on Super slims.

Datasheet is not available, because this chip is custom made for Sony.

The information that I've discovered about this chip:
-Step down switching DC/DC converter with enable input
-Input voltage: 5.5V
-Adjustable output voltage
-6-pin SON package with thermal pad
-Pinout:


I think it is only option to use any similar chip in the same package and the same pinout. In this case it is necessary to change the inductor value and values of tiny caps and resistors near the chip.
I did it few times and it works without problems.

I used chip TPS62290 (datasheet in the attachment).
The values of inductor and other tiny components are dependent of the chip type. It is described in datasheet of the chip.

Components that should be replaced (values are for the chip TPS62290):


1) Replace with inductor 2.2uH, package: 0806
2) Replace with resistor 360kΩ, 1%, package: 0402
3) Replace with bridge or resistor 0R, package: 0402
4) Replace with capacitor 22pF, package: 0402
5) Replace with resistor 180kΩ, 1%, package: 0402

All components are availabe here:
Chip TPS62290
Inductor 2.2uH
Resistor 0R
Resistor 180kΩ
Resistor 360kΩ
Capacitor 22pF

After replacing all of the described components first power it on without WiFi module and measure the output voltage. If it is ok (1.8V) solder new WIFI module (or replace Marwell QFN chip on the WiFi module, which goes bad) and it should work.