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PDF LC1761 Data sheet ( Hoja de datos )
| Número de pieza | LC1761 | |
| Descripción | Dual 300mA High PSRR Linear Regulator | |
| Fabricantes | LEADCHIP | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LC1761 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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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
TYPICAL PERFORMANCE CHARACTERISTICS
1) Output Voltage vs. Output Current
(with output short protection)
2) Output Voltage vs. Input Voltage
Current limit Vs. Vout
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
250 500 750 1000 1250 1500
Iload(mA)
3) Dropout Voltage vs. Output Current
3.3130
Line Regulation
3.3125
3.3120
3.3115
3.3110
3.3105
3.0 3.5 4.0 4.5
Vin(V)
4) Ripple rejection vs. Frequency
Iout=14(mA)
5.0 5.5 6.0
180
160
140
120
100
80
60
40
20
0
0
Dropout & Iout
Vout=3.3V
50 100 150 200 250 300 350
Iout(mA)
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
5 Your final power solution
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LC1761.PDF ] | |
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