US3036 Ver la hoja de datos (PDF) - Unisem
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Fabricante
US3036 Datasheet PDF : 7 Pages
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US3036
TYPICAL APPLICATION
5V to 2.5V for RDRAM Supply
ATX
P.S.
5V
5V(S.B.)
C8
L1
C1
8765
SS CS+ CS- Gnd
US3036
Drv Vcc Vfb NC
1234
C3
R3
C5
R1
L2
C6
R8
R6
Q2
C2
C4
R2 D1
R4
R5
3036app1-1.3
R7
Vout
C7
Figure 2- The circuit in figure 2 is the application of the US3036 providing a low cost solution for a 2.5V/2A supply from
the 5V dual supply. This circuit uses current sense resistor to set the current limiting.
Ref Desig
U1
Q2
D1
Description
LDO/Switcher IC
MOSFET
P Ch
Schottky Diode
Qty
Part #
1 US3036CS ( 8 pin SOIC)
1 IRF7204 (8 pin SOIC) or IRF7406 for 4A
SI9435DY (8 pin SOIC) or SI4431 for 4A
1 SK33DICT (SMC)
Manufacturer
Unisem
IR
Temic
Lite on
L2
L1
R1
R2
R3
R4
R5
R6
R7,8
C1
C2
C3
C4
C5
C6
C7
C8
Inductor
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
1 Core:T44-52,L=6 uH
Micro Metal
Turns: 15T, 20 AWG
(core)
1 L=1 uH
1 10 ohm,5%, SMT 1206 size
1 10 ohm, 5%, SMT 1206 size
1 200 kohm,1%, SMT 0805 size
1 1 kohm,1%, SMT 0805 size
1 1 kohm,1%, SMT 0805 size
1 5 miliohm,5%, 2W
Ohmite
2 3.57 kohm,1%, SMT 0805 size
1 470uF,10V, Elect
Sanyo
1 10CV1000DX, 1000uF,10V, Elect ,ESR=0.07 Ohm
Sanyo
1 1 uF,Ceramic, SMT 0805 size
1 470 pF,Ceramic, SMT 0805 size
Sanyo
1 10 pF,Ceramic, SMT 0805 size
Sanyo
1 4700pF
1 10CV1000DX, 1000uF,10V, Elect ,ESR=0.07 Ohm
Sanyo
1 0.15 uF
4-4
Rev. 1.1
12/4/98
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