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LC1761のメーカーはLEADCHIPです、この部品の機能は「Dual 300mA High PSRR Linear Regulator」です。 |
部品番号 | LC1761 |
| |
部品説明 | Dual 300mA High PSRR Linear Regulator | ||
メーカ | LEADCHIP | ||
ロゴ | |||
このページの下部にプレビューとLC1761ダウンロード(pdfファイル)リンクがあります。 Total 7 pages
LC1761
REV1.2-Revised July 2012
Dual 300mA High PSRR Linear Regulator
DESCRIPTION
LC1761 dual, low-noise, low-dropout regulator
delivers at least 300mA of continuous output
current. The output voltage for each regulator is
set independently by trimming. Output voltages
are selectable in 100mV steps within a range of
1.2V to 3.5V.Typical output noise is 47uVrms, and
PSRR is 73dB at 100Hz. The LC1761 includes two
independent logic-controlled shutdown inputs and
allows the output of each regulator to be turned
of independently.
LC1761 includes high accuracy voltage reference,
error amplifier, current limit circuit and output
driver module.
FEATURES
• Two low dropout voltage regulators
• 300mA output current for each LDO
• 25uA operating supply current per LDO
• Low 47uVRMS output noise
• Standby Mode: 0.1uA
• Low 160mV dropout at 300mA load
• 73dB PSRR at 100Hz
• Excellent Line regulation: 0.05%/V
• Independent Shutdown controls
• 1.2V to 3.5V Factory-Preset Output
• Output Current Limit
• Highly Accurate: ±2% (±1% customized)
APPLICATIONS
LC1761 has excellent load and line transient
response and good temperature characteristics,
which can assure the stability of chip and power
system. And it uses trimming technique to
guarantee output voltage accuracy within±2%.
LC1761 is available in SOT-23-6 package which is
lead(Pb)-free
• Cellular phones
• Cordless phones and radio communication
equipment
• Battery Powered equipment
• Notebook and hand-hold equipment
• Wireless LAN
• GPS receivers
TYPICAL APPLICATION
NOTE:
Input capacitor (Cin=1uF) and Output capacitor
(Cout=1uF/3.3uF) are recommended in all application
circuit.
ELECTRICAL CHARACTERISTICS
80
70
60
50
40
30
20
10
0
0.01
PSRR
Vout=3.3V
0.1 1 10
Freq(KHz)
100 1000
www.leadchip.com
1 Your final power solution
1 Page LC1761
ELECTRICAL CHARACTERISTICS
Test Conditions: Cin=1uF,Cout=3.3uF,TA=25°C, unless otherwise specified.
LC1761, For Arbitrary Output Voltage
Symbol
Parameter
Vin Input Voltage
Vout Output Voltage
Iout (Max.)
Vdrop
∆Vout
∆Vin ⋅Vout
∆Vout / ∆Iout
Iss
Maximun Output Current
Dropout
Voltage,Vout≥2.8V
Line Regulation
Load Regulation
Supply Current
Istandby
Supply Current (Standby)
∆Vout
∆T ⋅Vout
PSRR
Output Voltage
Temperature Coefficiency
Ripple Rejection
Ilim
Vceh
Vcel
en
Short Current Limit
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
Conditions
Vin=Set Vout+1V
1mA≤Iout≤30mA
Vin-Vout=1V
Iout=100mA
Iout=300mA
Iout=40mA
2.8V≤Vin≤6V
Vin=Set Vout+1V
1mA≤Iout≤300mA
Vin=Set Vout+1V
Vin=Set Vout+1V
Vce=GND
Iout=30mA
F=100Hz, Ripple=0.5Vp-p
Vin=Set Vout+1V
Vout = 0V
BW=10Hz~100kHz
Min
Vout
x0.98
300
1.5
0
Typ
Vout1
50
160
0.05
30
50
0.1
±100
70
500
47
Max
6
Vout
X1.02
80
220
0.2
50
100
1.0
Vin
0.25
Units
V
V
mA
mV
mV
%/V
mV
uA
uA
ppm/°C
dB
mA
V
V
uVrms
www.leadchip.com
3 Your final power solution
3Pages 5) Line transient response
Cin=Cout=1uF Iout=25mA vout=3.3V
Vin 4V
5V
Vout
6) Load transient response
Cin=Cout=1uF Vin=4.5v Vout=3.3V
50mA
1mA Output Current
Output Voltage
LC1761
5V
Vin
Vout
4V
50mA
1mA Output Current
Output Voltage
7) Start up from EN
Output
EN
8) Shut down from EN
Output
EN
www.leadchip.com
6 Your final power solution
6 Page | |||
ページ | 合計 : 7 ページ | ||
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PDF ダウンロード | [ LC1761 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
LC1761 | Dual 300mA High PSRR Linear Regulator | LEADCHIP |