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參數資料
| 型號： | SC1454XIMSTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Dual 150mA Ultra Low Dropout, Low Noise Regulator |
| 中文描述： | 雙150mA的超低壓差，低噪聲穩壓器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 261K |
| 代理商： | SC1454XIMSTRT |
1
www.semtech.com
SC1454
Dual 150mA Ultra Low
Dropout, Low Noise Regulator
POWER MANAGEMENT
Description
Revision: May 4, 2005
The SC1454 contains two ultra low dropout voltage
regulators (ULDOs). It operates from an input voltage
range of 2.25V to 6.5V, and a wide variety of output
voltage options are available. One ULDO has a fixed
output, and the other is either fixed (SETA pin grounded)
or adjustable using external resistors. Each ULDO has an
independent enable pin.
The SC1454 has a bypass pin to enable the user to
capacitively decouple the bandgap reference for very low
output noise (50μV
RMS
typically).
Designed specifically for battery operated systems, the
devices utilize CMOS technology to require very low
operating currents (typically 130μA with both outputs
supplying 150mA). In addition, the dropout voltage is
typically 155mV at 150mA, helping to prolong battery
life further. The devices are designed to provide 400mA
of peak current for applications which require high initial
inrush current.
They have been designed to be used with low ESR
ceramic capacitors to save cost and PCB area.
The SC1454 is available with a wide variety of voltage
options as standard. It comes in the tiny 8 lead MSOP
surface mount package.
Up to 150mA per regulator output
Low quiescent current
Low dropout voltage
Stable operation with ceramic caps
Very low 50μV
RMS
output noise
Wide selection of output voltages
Tight load and line regulation
Current and thermal limiting
Reverse input polarity protection
<1.5uA off-mode current
Logic controlled enable
Cellular telephones
Palmtop/Laptop computers
Battery-powered equipment
Bar code scanners
SMPS post regulator/dc to dc modules
High efficiency linear power supplies
OUTPUT A: 3.0V
OUTPUT B: 3.0V
VIN
ENABLE OUTPUT A
ENABLE OUTPUT B
C3
C2
C1
C4
U1
SC1454DIMS
1
2
3
4
5
7
6
8
OUTA
OUTB
GND
SETA
ENB
ENA
BYP
IN
OUTPUT A: 2.5V
OUTPUT B: 2.8V
VIN
ENABLE OUTPUT A
ENABLE OUTPUT B
C3
C4
C1
C2
R1
100k
R2
100k
U1
SC1454CIMS
1
2
3
4
5
7
6
8
OUTA
OUTB
GND
SETA
ENB
ENA
BYP
IN
Features
Applications
Typical Application Circuit
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| SC1454 | Dual 150mA Ultra Low Dropout, Low Noise Regulator |
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相關代理商/技術參數 |
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| SC1456 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR |
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| SC1456XIMSTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual 150mA Ultra Low Dropout, Low Noise Regulator |
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| SC1457 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Undervoltage Flag |
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