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參數資料
| 型號： | SC1185 |
| 廠商： | Semtech Corporation |
| 英文描述： | Programmable Synchronous DC/DC Converter, Dual LDO Controller(兼有可編程同步DC/DC控制器和雙固定(1.5V和2.5V)輸出低壓差穩壓器) |
| 中文描述： | 可編程同步DC / DC轉換器，雙LDO控制器（兼有可編程同步直流/直流控制器和雙固定（枚1.5V和2.5V的）輸出低壓差穩壓器） |
| 文件頁數： | 1/14頁 |
| 文件大小： | 238K |
| 代理商： | SC1185 |
POWER MANAGEMENT
Description
1
www.semtech.com
SC1185 & SC1185A
Programmable Synchronous DC/DC
Converter, Dual LDO Controller
Features
Applications
u
Pentium
ll microprocessor supplies
u
Flexible motherboards
u
1.3V to 3.5V microprocessor supplies
u
Programmable triple power supplies
Revision 1, December 2000
The SC1185 combines a synchronous voltage mode con-
troller with two low-dropout linear regulators providing
most of the circuitry necessary to implement three DC/
DC converters for powering advanced microprocessors
such as Pentium
II .
The SC1185 switching section features an integrated 5
bit D/A converter, pulse by pulse current limiting, inte-
grated power good signaling, and logic compatible shut-
down. The SC1185 switching section operates at a fixed
frequency of 140kHz, providing an optimum compromise
between size, efficiency and cost in the intended appli-
cation areas. The integrated D/A converter provides pro-
grammability of output voltage from 2.0V to 3.5V in
100mV increments and 1.30V to 2.05V in 50mV incre-
ments with no external components.
The SC1185 linear sections are low dropout regulators
supplying 1.5V for GTL bus and 2.5V for non-GTL I/O.
The Reference voltage is made available for external lin-
ear regulators.
Typical Application Circuit
u
Synchronous design, enables no heatsink solution
u
95% efficiency (switching section)
u
5 bit DAC for output programmability
u
On chip power good function
u
Designed for Intel Pentium
ll requirements
u
1.5V, 2.5V @ 1.25% for linear section
u
1.265V ± 1.5% Reference available
1.00k
PWRGOOD
2.5V
+
1500uF
2R2
IRLR3103N
+
330uF
1k
VLIN3
0.1uF
1.9uH
+
330uF
VID3
3.3V
SC1185CS
1
5
6
7
8
9
10
11
15
16
17
18
19
20
21
22
13
12
14
24
2
23
3
4
AGND
VCC
REF
PWRGOOD
CS-
CS+
PGNDH
DH
BSTH
EN
VOSENSE
VID4
VID3
VID2
VID1
VID0
DL
PGNDL
BSTL
GATE2
GATE1
LDOV
LDOS1
LDOS2
+
330uF
VID1
VID0
VID2
+
330uF
2.32k
0.1uF
IRLR024N
+
1500uF
5V
+
4.7uF
1.5V
VID4
x6
5mOhm
IRLR024N
EN
0.1uF
VCC_CORE
2R2
12V
IRLR024N
3.3V
0.1uF
12V
IRLR3103N
10
+
-
LM358
3
2
1
8
4
相關PDF資料 |
PDF描述 |
|---|---|
| SC1186CSW | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1186 | Programmable Synchronous DC/DC Converter, Dual LDO Controller(兼有可編程同步DC/DC控制器(1.3-3.5V輸出)和雙固定(1.5V和2.5V)輸出低壓差穩壓器) |
| SC1189 | Programmable synchronous DC/DC Converter, Dual LDO Controller |
| SC1189SWTR | Programmable synchronous DC/DC Converter, Dual LDO Controller |
| SC1202A | 600mA Low Dropout Positive Voltage Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC1185_05 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Programmable Synchronous DC/DC |
| SC1185A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER |
| SC1185ACSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER |
| SC1185ACSW.TR | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 1.3V to 3.5V 15A 24-Pin SOIC T/R |
| SC1185ACSW.TRT | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 1.3V to 3.5V 15A 24-Pin SOIC T/R |
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