US3036
TYPICAL APPLICATION
5V to 2.5V for RDRAM Supply
C8
8 7 6 5
SS CS+ CS- Gnd
US3036
Drv Vcc Vfb
NC
1 2 3 4
C3
R1
R3
C5
R6
C6
R7
L2
ATX
P.S.
5V
5V(S.B.)
Vout
L1
Q2
C1
C2
C4
R2
D1
R5
3036app2-1.0
C7
R4
Figure 2- The circuit in figure 2 is the application of the US3036 providing a low cost solution for a 2.5V supply from
the 5V dual supply.
Ref Desig
U1
Q2
D1
L2
L1
R1
R2
R3
R4
R5
R6
R7
C1
C2
C3
C4
C5
C6
C7
C8
Description
LDO/Switcher IC
MOSFET
P Ch
Schottky Diode
Inductor
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Part #
US3036CS ( 8 pin SOIC)
IRF7204 (8 pin SOIC) or IRF7406 for 4A
SI9435DY (8 pin SOIC) or SI4431 for 4A
SK33DICT (SMC)
Core:T44-52,L=6 uH
Turns: 15T, 20 AWG
L=1 uH
10 ohm,5%, SMT 1206 size
10 ohm, 5%, SMT 1206 size
200 kohm,1%, SMT 0805 size
1 kohm,1%, SMT 0805 size
1 kohm,1%, SMT 0805 size
1 kohm,5%
3.57 kohm,1%, SMT 0805 size
470uF,10V, Elect
10CV1000DX, 1000uF,10V, Elect ,ESR=0.07 Ohm
1 uF,Ceramic, SMT 0805 size
470 pF,Ceramic, SMT 0805 size
10 pF,Ceramic, SMT 0805 size
0.1uF
10CV1000DX, 1000uF,10V, Elect ,ESR=0.07 Ohm
0.15 uF
Manufacturer
Unisem
IR
Temic
Lite on
Micro Metal
(core)
Sanyo
Sanyo
Sanyo
Sanyo
Sanyo
Rev. 1.1
12/4/98
4-5
UNISEM [ UNISEM ]
