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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)： | 1/9頁 |
| 文件大?。?/td> | 79K |
| 代理商： | US3033 |
US3033
4-1
Rev. 1.5
1/14/99
PWM SWITCHER & LINEAR
CONTROLLER IC
TYPICAL APPLICATION
5V
Typical application of US3033 in a flexible mother board designed for Intel P55
,P54
AMD K5,K6
as well as Cyrix M1
and M2
applications.
Notes: P54C,P55C,Pentium II are trade marks of Intel Corp. K5 & K6 are trade marks of AMD corp. Cyrix 6X86L,M1,M2 are trade marks
of Cyrix Corp. Power PC is trade mark of IBM Corp.
TA (
°
C) 8 PIN PLASTIC
SOIC (S)
0 TO 70 US3033CS
DESCRIPTION
The US3033 IC
combines a switching controller and
a linear regulator controller all in a compact 8 pin
surface mount package
, providing a
total solution
for
dual supply processor applications such as an
Intel
P55C
, AMD K6
, as well as Cyrix 6X86L
and
the M2
processors. Typically in these applications a
dual supply regulator converts 5V to 3.3V for I/O supply
and a jumper programmable supply of 1.25V to 3.5V for
CORE supply .The linear regulator controller portion in
the US3033 is a programmable controller allowing flex-
ibility for the I/O regulator and has a minimum of 50mA
drive current capability designed to provide ample cur-
rent for an external pass transistor. The IC uses an inter-
nal regulator generated from the 12V supply to power
the controller as well as the 12V supply to drive the power
MOSFET, allowing a low cost N channel MOSFET
switch to be used. The IC also includes an error com-
parator for fast transient response, a precise voltage ref-
erence for setting the output voltage as well as a direct
drive of the MOSFET for the minimum part count.
FEATURES
LDO Controller allows the use of a low cost
pass transistor for the I/O supply
8 pin SOIC combines switching and linear
controller
Internal Pre-regulator Eliminates Cross talk
between Switching & Linear regulators
Automatic shut down of the linear regulator
when connected to the Vcc2 Det pin
On board MOSFET driver
Fastest transient response of any controller
method. ( 0 to 100% Duty Cycle in 100 nS )
1% internal voltage reference
Internal Under Voltage Lockout protects
MOSFET during start-up
APPLICATIONS
Dual supply low voltage processor applications,
such as: P55C
,CYRIX M2
, POWER PC
and
AMD K6
Simple 5V to 3.3V switcher for Pentium with AGP
or Pentium II
applications
PACKAGE ORDER INFORMATION
3033app1-1.1
CPU
I / O
Vcc2 Det
Core
5V
12V
Q1
C1
L1
C3
Q2
D1
C2
L2
R4
R5
C7
R6
R7
C6
R8
R3
C5
1
2
3
4
5
6
7
8
V12
Drv1V12swVfb1Vhyst
Gnd
Vfb2
Drv2
US3033
D2
R10
C8
R9
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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