Talk:Regulators

JSD-001 motherboard

All the components listed are controlled by Syscon and connected to it by a pin/trace either directlly or indirectlly, the traces are hidden in internal layers of the motherboard

By looking at the first syscon model used by the PS3 CXR713120-201GB where we know the names of the pin signals it seems these syscon control lines for voltage regulators could be the syscon pins named SW_xx_xx (switches, used as a generic name)

Mitsumi 463A (voltage regulator)

Mitsumi voltage regulator 463A
Seen on a JSD-001 motherboard

Pin	Signal	Description
1	5V_EVER	From power supply 5v standby rail (pin 1 of connector CN101)
2	3.3V_EVER_B	3.3v_standby_rail_2
3	?	Goes under package to the black 100 ohm resistor at its right, and from there to syscon SWx-x pin 26
4	?	Goes under package to squared testpad/sinkhole at its right (not connected ?)
5	V ?	To a capacitor, and from there to ground
6	?	To squared testpad/sinkhole at its top (not connected ?)
7	GND	Ground
8	3.3V_EVER_A	3.3v_standby_rail_1

Mitsumi 348A (voltage regulator)

Mitsumi voltage regulator 348A
Seen on a JSD-001 motherboard

Pin	Signal	Description
1	?	Not connected ?
2	?	Connected to syscon SWx-x pin 119
3	GND	Ground
4	?	output voltage rail 1 ?. Connected to pin 100 (and other 10 pins more) of HDMI controller. It has a testpad at the other side
5	?	output voltage rail 2 for A/V controller and optical ? (not tested). It has a testpad at the other side
6	GND	Ground
7	?	Connected to syscon SWx-x pin 119
8	5V_EVER	From power supply 5v standby rail (pin 1 of connector CN101)

Mitsumi 040 810X (close to RSX)

Pin	Signal	Description
1	?	connected to 4x sinkholes (it has a testpad at the other side)
2	?	hidden under package
3	GND	Ground
4	?
5	?	Connected to syscon SWx-x pin 75
6	?	hidden under package
7	?	hidden under package
8	?	connected to 2x sinkholes

D35653 0S25

Next to NOR, on top of the board JSD-001, responsible of the NOR VCC

Pin	Signal	Description
1	V_OUT	capacitor and 180 ohm resistor to ground... then to 4 sinkholes and at the other side NOR VCC 3.3v (testpoint)
2	GROUND
3	GROUND
4	?	capacitor to ground
5	?	Dissapears in a sinkhole and emerges near syscon, connected to SWx-x pin 50
6	GROUND
7	GROUND
8	V_IN_1	connected to BD9684 pins 3,8,17

BD3525

Pin	Signal	Description
1	V_OUT_x ?	to 4 sinkholes... at the other side to electrolitic capacitor 2.5v 330
2
3
4
5
6
7	?	diode to ground, and capacitor to ground, and diode to 55.8 ohm resistor to pin 1
8	?	capacitor to ground
9	GROUND
10	GROUND
11	V_IN_1	connected to BD9684 pins 3,8,17
12	?	46Kohm resistor to ground, and a trace that dissapears in a sinkhole and emerges near syscon, connected to SWx-x pin 52
13	?
14	V_IN_2	0.400mf capacitor to ground, to 4 sinkholes connected to BD3527 (near usb) pins 14 up to 20 and BD3527 (near flash) pins 14 up to 20
15
16
17
18
19
20

BD3527

There are 2 BD3527 on JSD-001 motherboard, one near flash and the other near usb connectors

near flash

Pin	Signal	Description
1	V_OUT_x ?	to 3 smd components to gnd, to electrolitic capacitor 2.5v 330, to 3 sinkholes with a testpoint at the other side
2
3
4
5
6
7	?	capacitor and 1600 ohm resistor to pin 1
8	?	diode ? to ground
9	GROUND
10	GROUND
11	V_IN_1	connected to BD9684 pins 3,8,17
12	?	dissapears in a sinkhole (resistor 23Kohm to ground in the other side) and emerges near syscon, connected to SWx-x pin 95
13	?	dissapears in a sinkhole (capacitor 915nf to ground in the other side)
14	V_IN_2	to 3 sinkholes missing at the other side, to 4 sinkholes connected to BD3525 pins 14 up to 20
15
16
17
18
19
20

near usb

Pin	Signal	Description
1	V_OUT_x ?	88 ohm resistor to ground, to a testpoint, to 4 sinkholes and to the other side to electrolitic capacitor 2.5v 330 (very close to a ram chip)
2
3
4
5
6
7	?	capacitor and 1600 ohm resistor to pin 1
8	?	diode ? to ground
9	GROUND
10	GROUND
11	V_IN_1	connected to BD9684 pins 3,8,17
12	?	42k ohm resistor to ground, and to a sinkhole that dissapears in the other side and emerges near syscon, connected to SWx-x pin 92
13	?	1000nf capacitor to ground
14	V_IN_2	capacitor to ground, to 4 sinkholes missing in the other side, connected to BD3525 pins 14 up to 20
15
16
17
18
19
20

BD9684 0906

Pin	Signal	Description
1	?	sealed coil... then to 8 sinkholes... to BD controller, etc...
2	?	dissapears under package
3	V_?	0.400mf capacitor to ground... then to 4 sinkholes... at the other side conneced to fuse/thermistor TH7601
4	?	to a sinkhole... at the other side 3.3K resistor to ground, then connected to pins 2 and 3 of a dual transistor (base of TR1, and collector of TR2)
5	GROUND
6	GROUND
7		dissapears under package
8	V_?	0.400mf capacitor to ground... then to the same 4 sinkholes of pin 3
9	?	dissapears under package
10	?	sealed coil... then tied to pin 11
11	?	to 6 sinkholes... at the other side to unpopulated service connector... etc...
12	?	tied to pin 13... capacitor to ground, to a 4x-sinkhole... then to BD controller
13	?	tied to pin 12... capacitor to ground, to a 4x-sinkhole... then to BD controller
14	GROUND
15	?	to a sinkhole... at the other side to BD controller
16	?	dissapears under package
17	V_?	0.400mf capacitor to ground... then to a sinkhole and tied to pin 3
18	?	towards blu ray laser connector
19	?	tied to pin 1
20	?	to a sinkhole... then to pin 6 of the same dual transistor (collector of TR1)

• pin 5 of the dual transistor (base of TR2) is connected to a long trace that dies in a sinkhole and emerges under syscon, connected to SWx-x pin 42
• the emitter pins of the dual transistor (1 and 4) are connected to a common ground