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參數(shù)資料
| 型號： | SC1173 |
| 廠商： | Semtech Corporation |
| 英文描述： | Programmable Synchronous DC/DC Converter With LDO Controller(兼有可編程同步DC/DC控制器和可調(diào)輸出低壓差穩(wěn)壓器) |
| 中文描述： | 可編程同步DC / DC轉(zhuǎn)換器與穩(wěn)壓器控制器（兼有可編程同步直流/直流控制器和可調(diào)輸出低壓差穩(wěn)壓器） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 227K |
| 代理商： | SC1173 |
POWER MANAGEMENT
Description
1
www.semtech.com
SC1172 & SC1173
Programmable Synchronous DC/DC
Converter with 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, January 2001
The SC1172/3 combines a synchronous voltage mode con-
troller with a low-dropout linear regulator providing most
of the circuitry necessary to implement two DC/DC con-
verters for powering advanced microprocessors such as
Pentium
II .
The SC1172/3 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 SC1172/3 switching section operates at a fixed
frequency of 200kHz, providing an optimum compromise
between size, efficiency and cost in the intended applica-
tion 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 increments with
no external components.
The SC1172/3 linear section is a low dropout regulator.
The SC1172 supplies 1.5V for GTL bus , the SC1173 fea-
tures an adjustable LDO voltage.
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 VRM8.1 requirements.
u
1.5V or Adjustable @ 1% for linear section.
Typical Application Circuit
OVP
+
4.7uF
U4
SC1172/3CSW
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
OVP
PWRGOOD
CS-
CS+
PGNDH
DH
BSTH
EN
VOSENSE
VID4
VID3
VID2
VID1
VID0
DL
PGNDL
BSTL
GATE
NC
LDOV
NC
LDOS
10
+
330uF
5mOhm
x4
IRLR3103N
0.1uF
VID3
1.5V
IRLR3103N
VID1
0.1uF
+
1500uF
x2
12V
0.1uF
VCC_CORE
2.32k
VID0
+
330uF
2R2
5V
3.3V
2R2
VID4
PWRGOOD
VID2
1.9uH
IRLR024N
EN
+
1500uF
0.1uF
1.00k
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| SC1175CSW.TR | Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1173CSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER WITH LOW DROPOUT REGULATOR CONTROLLER |
| SC1175 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175_04 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175CSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry |
| SC1175CSW TR | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 2.75V 1A 20-Pin SOIC T/R |
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