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PDF LD6918 Data sheet ( Hoja de datos )
| Número de pieza | LD6918 | |
| Descripción | Low-Noise CMOS Dual LDO Regulators | |
| Fabricantes | Leadtrend | |
| Logotipo |  |
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LD6918
6/16/2008
300mA, Low-Noise CMOS Dual LDO Regulators
REV: 00
General Description
The LD6918 is a dual micro power linear regulator, featuring
low quiescent current, low-noise, low-dropout and high ripple
rejection ration. The precision of feedback reference voltage
is within ±1% and output current is up to 300mA. As well, the
LD6918 can be stable with a 1μF low ESR ceramic output
capacitor which reduces the board space and cost.
The LD6918 is available in SOT23-6; DFN-8L 3 x 3; DFN-8L
2 x 2 and DFN-6L 1.6 x 1.6 packages.
+patented
Features
z Wide Operating range: 2.5V to 5.5V
z Low Noise for RF application
z No Noise Bypass capacitor required
z Low Quiescent Current: 40μA (typ.)/LDO
z High Output Voltage Accuracy: ±1%
z High RSRR:70dB @ 1KHz
z VOUT Discharge Function
z Very Small Inrush Current
z Thermal Shutdown and Current Limiting Protection
z Output Voltage : 1.5V to 3.3V
(0.1V increments, 1.85V, 2.85V, 3.15V extra)
Applications
z Battery-Powered Equipment
z Hand-Held Instruments
Typical Application Circuit
VIN
CIN
1μF
Chip Enable 1
Chip Enable 2
VIN OUT1
LD6918
CE1
OUT2
CE2
GND
VOUT1
COUT1
1μF
VOUT2
COUT2
1μF
Fig. 1 Typical Application Circuit
Leadtrend Technology Corporation
LD6918-DS-00, June 2008
1
www.leadtrend.com.tw
1 page  
LD6918
Electrical Characteristics
(CE1=CE2=VIN, CIN=COUT1=COUT2=1μF, VIN=4.3V, VOUT1=1.5V, VOUT2=3.3V,TA=-40°C to +85oC unless otherwise stated,
Typical value are at TA=25°C) (NOTE 1)
PARAMETER
INPUT POWER
Input Voltage
Quiescent Current
Shutdown Supply Current
Dropt Voltage
Dropt Voltage (Note2)
OUTPUT
Output Current Limit
Output Voltage Accuracy
Line Regulation
Load Regulation
Output Noise Voltage
Ripple Rejection
Discharge Resistance
In shutdown
CONDITIONS
CE1=CE2=VIN, IOUT1= IOUT2=0mA
CE1=CE2=GND
IOUT=200mA, VOUT≥3.0V
IOUT=300mA, VOUT ≥3.0V
IOUT=200mA, 2.5V≤ VOUT <3.0V
IOUT=300mA, 2.5V≤VOUT<3.0V
IOUT=200mA, 2.0V≤ VOUT <2.5V
IOUT=300mA, 2.0V≤VOUT<2.5V
IOUT=1mA, TA =+25°C;
IOUT=1mA, TA=-40°C to +85°C
IOUT=1mA to 300mA,
TA= -40°C to +85°C
VIN=VOUT+1V to 5.5V, IOUT=1mA,
1mA≤ IOUT≤ 300mA
BW=100Hz to 100KHz,IOUT=1mA
F=1KHz, EIN=1Vrms,
IOUT=10mA, COUT=2.2μF
F=10KHz, EIN=1Vrms,
IOUT=10mA, COUT=2.2μF
F=100KHz, EIN=1Vrms,
IOUT=10mA, COUT=2.2μF
F=1MHz, EIN=1Vrms,
IOUT=10mA, COUT=2.2μF
CE1=High to Low
CE2=High to Low
MIN TYP MAX UNITS
2.5 - 5.5 V
90 130 μA
- 0.1 1 μA
170 220 mV
240 mV
190 250 mV
270 mV
255 330 mV
350 mV
330 420
mA
-1 +1 %
-2 +2 %
-3 +3 %
0.02 %/V
- 0.001 0.003 %/mA
60 μVrms
- 70 - dB
60
- 50 - dB
- 35 - dB
- 120 250
Ω
- 120 250
Leadtrend Technology Corporation
LD6918-DS-00, June 2008
5
www.leadtrend.com.tw
5 Page 
Package Information
SOT-26
LD6918
Symbol
A
B
C
D
F
H
I
J
M
θ
Dimension in Millimeters
Min Max
2.692
3.099
1.397
1.803
-------
1.450
0.300
0.550
0.838
1.041
0.080
0.254
0.050
0.150
2.600
3.000
0.300
0.600
0° 10°
Dimensions in Inches
Min Max
0.106
0.122
0.055
0.071
-------
0.058
0.012
0.022
0.033
0.041
0.003
0.010
0.002
0.006
0.102
0.118
0.012
0.024
0° 10°
Leadtrend Technology Corporation
LD6918-DS-00, June 2008
11
www.leadtrend.com.tw
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LD6918.PDF ] | |
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