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參數(shù)資料
| 型號： | SC1185A |
| 廠商： | Semtech Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 122K |
| 代理商： | SC1185A |
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
1999 SEMTECH CORP.
PRELIMINARY - January 6, 1999
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1185
SC1185A
1
DESCRIPTION
The SC1185 combines a synchronous voltage mode
controller 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,
integrated power good signaling, and logic compatible
shutdown. The SC1185 switching section operates at
a fixed frequency of 140kHz, providing an optimum
compromise between size, efficiency and cost in the
intended application areas. The integrated D/A con-
verter provides programmability of output voltage
from 2.0V to 3.5V in 100mV increments and 1.30V to
2.05V in 50mV increments with no external compo-
nents.
The SC1185 linear sections are low dropout regula-
tors supplying 1.5V for GTL bus and 2.5V for non-
GTL I/O. The Reference voltage is made available for
external linear regulators.
Pentium is a registered trademark of Intel Corporation
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
BLOCK DIAGRAM
2.5V/ADJ.
1.5V/ADJ.
1.265V
REF.
FET
CONTROLLER
FET
CONTROLLER
REF.
VCC
CS-
CS+
EN
BSTH
DH
PGNDH
BSTL
DL
PGNDL
LDOV
GATE2
LDOS2
AGND
REF
VID4
VID3
VID2
VID1
VID0
VOSENSE
PWRGOOD
LDOS1
GATE1
D/A
PIN CONFIGURATION
AGND
GATE1
LDOS1
LDOS2
VCC
REF
PWRGOOD
CS-
CS+
PGNDH
DH
PGNDL
1
2
3
4
5
6
7
8
9
LDOV
VID0
VID1
VID2
VID3
VID4
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VOSENSE
EN
BSTH
BSTL
DL
GATE2
Top View
(24 Pin SOIC)
FEATURES
Synchronous design, enables no heatsink solution
95% efficiency (switching section)
5 bit DAC for output programmability
On chip power good function
Designed for Intel Pentium
ll requirements
1.5V, 2.5V @ 1% for linear section
1.265V ± 1.5% Reference available
APPLICATIONS
Pentium
ll microprocessor supplies
Flexible motherboards
1.3V to 3.5V microprocessor supplies
Programmable triple power supplies
ORDERING INFORMATION
Part Number
(1)
Package
Linear
Voltage
1.5V/2.5V 0° to 125°C
Temp.
Range (T
J
)
SC1185CSW
SC1185ACSW
(2)
SO-24
SO-24
1.5V/2.5V 0° to 125°C
Note:
(1) Add suffix ‘TR’ for tape and reel.
(2) SC1185A provides improved output tolerance. See
Output Voltage Table.
相關PDF資料 |
PDF描述 |
|---|---|
| SC1185ACSW | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1185CSW | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1185 | 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(wěn)壓器) |
| 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(wěn)壓器) |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| SC1185ACSWTRT | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 1.3V to 3.5V 15A 24-Pin SOIC T/R |
| SC1185CSW | 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 |
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