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PDF LD6919 Data sheet ( Hoja de datos )
| Número de pieza | LD6919 | |
| Descripción | High PSRR CMOS LDO Regulator | |
| Fabricantes | Leadtrend | |
| Logotipo |  |
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LD6919
11/13/2009
500mA, Ultra-Low Noise, High PSRR CMOS LDO Regulator
with Soft Start Function
REV: 00a
General Description
The LD6919 is a micro power linear regulator with very low
output voltage drop during load transient, featuring
ultra-low noise, low-dropout and high ripple rejection ratio
for optimal performance of battery-powered systems. This
SS pin can suppress the noise and is built in with soft start
function. Using Leadtrend’s own proprietary control
scheme, the output voltage can be set by the value chosen
for the RJ resistor on SS pin. As well, the LD6919 can be
stable with an output capacitor of 1μF which reduces the
board space and cost.
The LD6919 is available in a space saving SOT25,
SC70-6 and DFN-6L 1.6mm x 1.6mm package.
+Patented
Features
z Wide Operating Input Voltage Range：2.5V to 5.5V
z Very-Low Output Voltage Drop during Load
Transient
z Ultra-Low Noise for RF Application
z Shutdown Current <1μA
z High PSRR 70dB@1kHz
z Stable with 1μF Output Capacitor
z Thermal Shutdown and Current Limiting Protection
z VOUT Discharge Function
z Soft Start Operation
z Fixed Output Voltage: 1.5V to 3.3V (step：0.1V) and
3.45V or adjustable through RJ resistor
Applications
z Battery-Powered Equipment
z Hand-Held Instruments
z Palmtops, Notebook Computers
Typical Application
Fig. 1 Typical Application Circuit for General Purpose
Reference example
RJ (Ω)(1%)
VOUT
RJ open
3.1V
2.2M
3.0V
680k
2.8V
510k
2.7V
300k
2.5V
100k
1.8V
VOUT(w.RJ )
=
RJ(kΩ)
RJ(kΩ) + 70
× VOUT(w/o RJ)
Leadtrend Technology Corporation
LD6919-DS-00a November 2009
1
www.leadtrend.com.tw
1 page  
LD6919
11/13/2009
Electrical Characteristics
(VIN=VOUT+1V, TA = 25 oC, unless otherwise stated. CIN=COUT=1μF, CSS=22nF; the LD6919 is tested with 3.1V
output, unless other stated.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
INPUT POWER
Input Voltage
Quiescent Current
Shutdown Supply Current
CE>1.5V, IOUT=0mA
CE=GND
2.5 - 5.5 V
- 80 105 μA
- 0.1 1 μA
Dropt Voltage
Dropt Voltage (Note2)
IOUT=300mA, 3.6V≤VIN≤5.5V
230 300 mV
Soft Start
Soft Start Resistance
Output
Output Current Limit
Output Voltage Accuracy
Line Regulation
Load Regulation
Ripple Rejection
Output Noise Voltage
Discharge Resistance
shutdown
CE
Impedance to GND
CE Input Level
IOUT=500mA, 3.6V≤VIN≤5.5V
RLOAD=1Ω
IOUT=10mA
VIN=VOUT+1V, to 5.5V,
IOUT=1mA
1mA<IOUT<300mA
VIN=VOUT+1V, 2.5V≤VOUT≤3.3V
1mA<IOUT<500mA
VIN=VOUT+1V, 2.5V≤VOUT≤3.3V
F=120Hz, EIN=1Vrms,
IOUT=10mA
F=1kHz, EIN=1Vrms,
IOUT=10mA
F=10kHz, EIN=1Vrms,
IOUT=10mA
VOUT=1.8V,IOUT=0mA
CSS=22nF
in CE=High to Low
Enable, VIN=2.5V~5.5V
Disable, VIN=2.5V~5.5V
-
550
-2
-
-
-
-
-
1.5
-
380
70
600
0.05
70
70
65
35
80
200
-
-
500 mV
- kΩ
mA
+2 %
0.2 %/V
0.8 %
1.6 %
dB
- dB
- dB
- μVrms
160 Ω
kΩ
-V
0.6 V
Leadtrend Technology Corporation
LD6919-DS-00a November 2009
5
www.leadtrend.com.tw
5 Page 
Package Information
SC70-6
LD6919
11/13/2009
Symbol
A
B
C
D
F
H
I
J
M
θ
Dimension in Millimeters
Min Max
1.800
2.200
1.150
1.350
0.800
1.100
0.150
0.400
0.650 TYP
0.080
0.250
0.000
0.100
1.800
2.400
0.100
0.460
0° 8°
Dimensions in Inches
Min Max
0.071
0.087
0.045
0.053
0.031
0.043
0.006
0.016
0.026 TYP
0.003
0.010
0.000
0.004
0.071
0.094
0.004
0.018
0° 8°
Leadtrend Technology Corporation
LD6919-DS-00a November 2009
11
www.leadtrend.com.tw
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LD6919.PDF ] | |
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