參數(shù)資料
型號(hào)： SC1401ISS
廠商： Semtech Corporation
英文描述： HIGH PERFORMANCE SYNCHRONOUS BUCK CONTROLLER WITH LDO FOR PORTABLE POWER
中文描述： 高性能同步降壓控制器的便攜式功率穩(wěn)壓器
文件頁(yè)數(shù)： 1/17頁(yè)
文件大?。?/td> 202K
代理商： SC1401ISS
SC1401
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
HIGH PERFORMANCE SYNCHRONOUS BUCK
CONTROLLER WITH LDO FOR PORTABLE
POWER
November 21, 2000
1
DESCRIPTION
The SC1401 is a synchronous buck regulator designed
to power the latest generation microprocessors in
battery operated systems. The SC1401 may be used
to provide both the I/O and core voltages utilizing
synchronous rectification for the core supply voltage
and an LDO N-Channel MOSFET controller for the I/O
supply voltage. A 1.25 volt reference allows lower
output voltages required by today’s portable
microprocessors.
The synchronous buck regulator is capable of
achieving efficiencies up to 95%. The gate drive
circuitry can deliver 2.0A peak currents, allowing the
use of N-channel MOSFETs for lower switching and
conduction losses.
A digital soft start is provided to ensure orderly start up
of the power supply without the need for external
components. At light load in power save mode, the
controller changes mode of operation by missing gate
drive cycles, thus reducing gate drive current and
improving efficiency. A logic high on PSAVE disables
the power saving mode thus reducing noise. The
SC1401 is fabricated in a high performance BiCMOS
process. This process reduces the power dissipation
in low current and shutdown operation modes and
improves efficiency.
The LDO controller is a high performance positive
voltage regulator designed to provide a low noise
power source to the microprocessor peripherals by
driving a low cost external N-Channel MOSFET.
FEATURES
>90% Efficiency (SMPS)
6.0V to 30V Input range
1.25V to 5.5V Adjustable output (SMPS)
PWM and LDO regulator outputs
High output gate drive of 2 Amps (SMPS)
Power save mode for light load operation
200kHz/300kHz fixed-frequency PWM operation
2mA Typical quiescent current
2μA Typical shutdown current
DEVICE
PACKAGE
TEMP. (T
A
)
SC1401ISS
SSOP-20
-40°C - +85°C
ORDERING INFORMATION
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
APPLICATIONS
Notebook and palmtop computers
LCD monitors
Internet appliances
Notes
(1) Add suffix “TR” for tape and reel.
TYPICAL APPLICATION CIRCUIT
C16
D3
C15
C7
VO_LINEAR
C3
R6
SHDN
R2
RESET
U1
SC1401ISS
18
14
11
9
13
15
17
16
10
19
12
20
8
3
5
2
4
1
7
6
ENABLEIO
BST
PGND
DL
DH
VDD2
IOS
GATEIO
PGND
RESET
PHASE
PSAVE
V5V
FB
GND
SHDN
VDD1
SYNC
CSH
CSL
R5
C5
+5V
L1
C1
D2
VO_SMPS
PSAVE
VDD2
R1
C12
C13
C10
C14
Q2
R3
R7
C8
D1
Q1
C6
Q3
C9
C4
C2
SYNC
D4
C11
R4
ENABLE_IO
VIN
+5V
相關(guān)PDF資料
PDF描述
SC1401 High Performance Synchronous Buck Controller with LDO for Portable Power(用于便攜式電源帶低壓差輸出的高性能同步步降控制器（1.25-5.5V可調(diào)輸出）)
SC1402 Multi-Output, Low-Noise Power Supply Controller for Notebook Computers
SC1402ISS Multi-Output, Low-Noise Power Supply Controller for Notebook Computers
SC1403ITSTRT Mobile Multi-Output PWM Controller with Lossless Current Sense
SC1403 Mobile Multi-Output PWM Controller with Virtual Current SenseTM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC1402 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multi-Output, Low-Noise Power Supply Controller for Notebook Computers
SC1402ISS 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multi-Output, Low-Noise Power Supply Controller for Notebook Computers
SC1403 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Mobile Multi-Output PWM Controller with Virtual Current SenseTM
SC1403_04 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Mobile Multi-Output PWM Controller with Lossless Current Sense
SC1403ITSTR 制造商:Semtech Corporation 功能描述:IC, MULTI-OUTPUT PWM CONTROLLER, 28-TSSOP, Primary Input Voltage:15V, No. of Out
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