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| 型號： | US3036CS |
| 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 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 56K |
| 代理商： | US3036CS |
US3036
4-1
Rev. 1.1
12/4/98
8 PIN PWM SWITCHER
CONTROLLER IC
PRELIMINARY DATASHEET
Typical application of US3036
TA (
°
C) 8 PIN PLASTIC
SOIC (S)
0 TO 70 US3036CS
DESCRIPTION
The US3036 IC
provides an 8 pin low cost switching
controller with true short circuit protection all in a
compact 8 pin surface mount package,
providing a
low cost switching solution
for applications that re-
quire a simple switching regulator from the 5V input where
there is no other supply available. One type of such
application is generating 2.5V standby from the dual
5V(5V and 5V standby) for the next generation proces-
sors. The IC starts below 4.5V supply and drives an
external Pch MOSFET or and external low cost PNP as
the switching element. 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
8 pin SOIC Switching Controller with
HICCUP Current Limiting Reduces Diode Power
Dissipation to Less than 1% of Normal Opera-
tion
Soft Start Capacitor allows for smooth Output
Voltage ramp up
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
Single input Switching Regulators such as Simple
5V to 2.5V switcher for RDRAM regulator
PACKAGE ORDER INFORMATION
TYPICAL APPLICATION
3036app2-1.0
Vout
C1
L1
C3
Q2
C2
L2
R4
C7
D1
R2
C4
R5
R1
R3
C5
C8
US3036
R6
C6
R7
1
2
3
4
5
Gnd
6
CS-
7
8
SS
Drv Vcc
Vfb
NC
CS+
ATX
P.S.
5V
5V(S.B.)
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