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_x or SW_x_x (switches, used as a generic name for slave components that only has 2 states)

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	OUT	(Output voltage pin) to 4 sinkholes... at the other side to electrolitic capacitor 2.5v 330
2
3
4
5
6	VOS	(Output voltage control pin) Shorten with Out pins
7	FB	(Reference voltage feedback pin) diode to ground, and capacitor to ground, and diode to 55.8 ohm resistor to pin 1
8	NRCS	(Non Rush Current on Start-up capacitor connection pin) capacitor to ground
9	GND	(Ground pin)
10	GND	(Ground pin)
11	VCC	(Power supply pin) connected to BD9684 pins 3,8,17
12	EN	(Enable input pin) 46Kohm resistor to ground, and a trace that dissapears in a sinkhole and emerges near syscon, connected to SWx-x pin 52
13	SCP	(Short Circuit Protection delay time setting capacitor connection pin)
14	VD	(IN input voltage detect pin) shorten with IN pins
15	IN	(Input voltage pin) 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
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