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PRODUCT SPECIFICATION
RC5037
7
P
Table 1. Bill of Materials for a RC5037 13A Application
Table 2. Switching Regulator Components Selection Table
Qty.
3
2
1
1
2
Reference
C1, C7, C8
C2, C3, C4
C5
C6
C9, C10, C11,
C12, C13, C14
R1
R2
R3
Manufacturer
Rohm
Sanyo
Rohm
Rohm
Sanyo
Part Number
MCH212F104ZP
10MV1200GX
MCH312F105ZP
MCH215A181JK
6MV1500GX
Description
100nF +80/-20%, 25V Z5U Ceramic Capacitor
1200
m
F, 10V 44m
W
Aluminum Capacitor
1
m
F +80/-20%, 25V Z5U Ceramic Capacitor
180pF
±
5%, 50V COG Ceramic Capacitor
1500
m
F, 6.3V, 44m
W
Aluminum Capacitor
1
1
1
Panasonic
Panasonic
Fairchild
Semiconductor
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Motorola
Any
Motorola
IR
Panasonic
Pulse
Fairchild
Semiconductor
ERJ-6GEYJ470
ERJ-6GEYJ4R7
RC10-52
47
W
±
5%, 1/10W Resistor
4.7
W
±
5%, 1/10W Resistor
5.2m
W
, 1W Resistor
1
1
1
1
1
1
1
1
1
1
1
1
R7
R8
R9
R10
R11
D1
D2
D3
Q1
L1
L2
U1
ERJ-ENF 2.0 0KV
ERJ-ENF 0.80KV
ERJ-ENF 2.26KV
ERJ-ENF 1.87KV
ERJ-ENF 1.74KV
MBR1545CT
1N4148
1N4735A
IRL3103
EXC-ELDR35V
PE-53682
RC5037M
0.1% resistor desirable for accuracy
0.1% resistor desirable for accuracy
0.1% resistor desirable for accuracy
0.1% resistor desirable for accuracy
0.1% resistor desirable for accuracy
15A, 45V Schottky Diode
Small Signal Diode
6.2V
±
5%, 1W, Zener Diode
30V, 14m
W
Logic Level MOSFET
2.5
m
H Bead Inductor
4.7
m
H, I
SAT
> 10A Inductor
Adjustable Switching Regulator
Output Voltage
Output Current
8
6
6.25
7.5
9.5
13
5.6
3
C
IN
Sanyo 10MV1200GX
1x
1x
1x
1x
2x
3x
1x
N/A
C
OUT
Sanyo 6M1500GX
2x
2x
2x
2x
4x
6x
2x
1x
Power MOSFET
(M1)
IRL3103
IRL3103
IRL3103
IRL3103
IRL3103
IRL3103
IRL3103
Si9936
3.5
2.8
2.9
2.9
3.2
3.2
2.1
3.3
Applications Information
The following discussion is intended to be an abbreviated list
of design considerations regarding the RC5037 as used in a
typical processor motherboard application. For a more thor-
ough discussion of applicable specifications and layout con-
siderations relating to the Intel Pentium P55C processor,
please refer to Application Note 48.
Output Voltage Selection
Feedback Voltage Divider
The RC5037 precision reference is trimmed to be 1.5V nom-
inally. When using the RC5037, the system designer has
complete flexibility in choosing the output voltage for each
regulator from 1.5V to 3.6V. This is done by appropriately
selecting the feedback resistors. These should be 0.1% resis
tors to realize optimum output accuracy. The following
equations determine the output voltages of the two regula-
tors: