參數(shù)資料
型號(hào)： US3034
廠商： Unisem Group
英文描述： 8 PIN PWM SWITCHER CONTROLLER IC
中文描述： 8引腳的PWM開關(guān)控制器IC
文件頁(yè)數(shù)： 6/9頁(yè)
文件大小： 74K
代理商： US3034
US3034
4-6
Rev. 1.8
1/13/99
Figure4- The circuit in figure 4 is the application of the US3034 which is done using a dual layout with US3033 in a
switching mode only. This circuit can be used to generate a low cost 5V to 3.3V for either Pentium application with AGP socket or in
Pentium II applications where it is desirable to generate an accurate on board 3.3V supply.
TYPICAL APPLICATION
5V to 3.3V for Pentium Application with AGP or Pentium II Application without ATX power supply
Switching mode Operation. (US3034 and US3033 Dual Layout)
Ref Desig
U1
Q2
Description Qty
LDO/Switcher IC
MOSFET
Part #
US3034CS ( 8 pin SOIC)
IRL3303 (TO220)
IRL3103S (TO263) (note 1)
MBR1045CT (TO220)
MBRB1545CT (TO263) (note1)
Core:T50-18,L=4 uH
Turns: 10T, 18 AWG
L=2 uH
22 ohm,5%, SMT 1206 size
open for US3034, 10 ohm for US3033
10 ohm, 5%, SMT 1206 size
249 kohm,1%, SMT 0805 size
1 kohm,1%, SMT 0805 size
576 ohm,1%, SMT 0805 size
5 miliohm,5%, 2W
4.99 kohm,1%, SMT 0805 size
4.7 kohm,5% for US3034, open for 3033
6MV1500GX, 1500uF,6.3V, Elect
1 uF,Ceramic, SMT 0805 size
470 pF,Ceramic, SMT 0805 size
10 pF,Ceramic, SMT 0805 size
4700pF for US3034, open for US3033
6MV1500GX, 1500uF,6.3V, Elect
0.047 uF for 3034 , 0.1uf for 3033
For MOSFET , 577002
For Schottky Diode , 577002
Manufacturer
Unisem
International
Rectifier
1
1
D1
Schottky Diode
1
Motorola
Micro Metal
L2
Inductor
1
(core)
L1
R1
R9
R2
R3
R4
R5
R6
R7
R8
C1,2
C3
C4
C5
C6
C7
C8
HS1
HS2
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Heat Sink
Heat Sink
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
1
Sanyo
Sanyo
Sanyo
Sanyo
Aavid
Aavid
Note 1: For the applications where it is desirable to eliminate the heat sink, the IRL3103S for Q2 and MBR1545CT for D2 in TO263
packages with minimum of 1" square copper pad can be used.
3034app3-1.0
Vout
5V
C1
L1
C3
Q2
C2
L2
R4
C7
D1
R2
C4
R5
R1
R3
C5
R8
R6
C6
R7
12V
C8
R9
1
2
3
4
5
6
7
8
SS/
V12
Drv V12 Vfb Vhyst
Gnd
CS-/
Vfb2
CS+/
Drv2
U1
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
US3034CS 制造商:UNISEM 制造商全稱:UNISEM 功能描述:8 PIN PWM SWITCHER CONTROLLER IC
US3036 制造商:UNISEM 制造商全稱:UNISEM 功能描述:8 PIN PWM SWITCHER CONTROLLER IC
US3036CS 制造商:UNISEM 制造商全稱:UNISEM 功能描述:8 PIN PWM SWITCHER CONTROLLER IC
US3052EDK1 制造商:Renesas Electronics Corporation 功能描述:SUPPTOOL_RTE - Bulk
US3068EDK1 制造商:Renesas Electronics Corporation 功能描述:SUPPTOOL_RTE - Bulk
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