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參數(shù)資料
| 型號： | US3033 |
| 廠商： | Unisem Group |
| 英文描述： | PWM SWITCHER & LINEAR CONTROLLER IC |
| 中文描述： | 脈寬調(diào)制開關(guān) |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 79K |
| 代理商： | US3033 |
US3033
4-6
Rev. 1.5
1/14/99
Mode of Operation L1 L2 D1 C4 C5 R1A R1B R2 R3 R4 R5 R6 R7
Switching
V V V V V O V V V V V V O
Linear
S S O O O V O O O V O V V
V = See parts list for value
S = Short O = Open
TYPICAL APPLICATION
5V to 3.3V for Pentium Application with AGP or Pentium II Application without ATX power supply
Dual mode Operation between Switching or Linear mode.
C9
Ref Desig
U1
Q2
Description Qty
LDO/Switcher IC
MOSFET
Part #
US3033CS ( 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
2.4k ohm,5%, SMT 1206 size
22 ohm,5%, SMT 1206 size
10 ohm, 5%, SMT 1206 size
249 kohm,1%, SMT 0805 size
1 kohm,1%, SMT 0805 size
576 ohm,1%, SMT 0805 size
180 ohm,1%, SMT 0805 size
100 ohm,1%, SMT 0805 size
10 ohm, 5%, SMT 1206 size
1k ohm, 5%, SMT 1206 size
7.5k ohm, 5%, SMT 1206 size
6MV1500GX, 1500uF,6.3V, Elect
1 uF,Ceramic, SMT 0805 size
470 pF,Ceramic, SMT 0805 size
10 pF,Ceramic, SMT 0805 size
6MV1500GX, 1500uF,6.3V, Elect
1 uF,Ceramic, SMT 0805 size
470pF,Ceramic, SMT 0805 size
For MOSFET in Switching mode , 577002
For MOSFET in Linear mode :
507222 (3.3V current<5A),
576602 (3.3V current< 3.5A)
1
For Schottky Diode , 577002
Manufacturer
Unisem
International
Rectifier
1
1
D1
Schottky Diode
1
Motorola
Micro Metal
L2
Inductor
1
(core)
L1
R1A
R1B
R2
R3
R4
R5
R6
R7
R9
R10
R13
C1,2
C3
C4
C5
C7
C8
C9
HS1
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Heat Sink
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
Sanyo
Sanyo
Sanyo
Sanyo
Aavid
HS2
Heat Sink
Aavid
3033app3-1.3
Vout
5V
C1
L1
C3
Q2
C2
L2
R4
C7
R6
R7
D1
R2
C4
R5
R1A
R1B
12V
R3
C5
C8
R9
1
2
3
4
5
6
7
8
V12
Drv1V12swVfb1 Vhyst
Gnd
Vfb2
Drv2
U1
R10
R13
Figure3- This unique application of US3033 allows the de-
signer to switch between Linear or Switching mode of
operation using a single IC. This circuit has the flexibility
to be used for low current operation in Linear mode for
cost reasons and yet be able to operate in the Switching
mode if the load current increases and the heat gener-
ated by the Linear operation will be an issue. Table below
descibes the components that will be effected for the
two modes of operation.
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| US3033CS | PWM SWITCHER & LINEAR CONTROLLER IC |
| US3034 | 8 PIN PWM SWITCHER CONTROLLER IC |
| US3034CS | 8 PIN PWM SWITCHER CONTROLLER IC |
| US3036 | 8 PIN PWM SWITCHER CONTROLLER IC |
| US3036CS | 8 PIN PWM SWITCHER CONTROLLER IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| US3033CS | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:PWM SWITCHER & LINEAR CONTROLLER IC |
| US3034 | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:8 PIN PWM SWITCHER CONTROLLER IC |
| 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 |
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