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PDF LD6909 Datasheet ( Hoja de datos )

Número de pieza LD6909
Descripción 300mA CMOS LDO Regulator
Fabricantes Leadtrend 
Logotipo Leadtrend Logotipo

Total 9 Páginas
		
LD6909 Hoja de datos, Descripción, Manual
300mA CMOS LDO Regulator
LD6909
5/1/2006
REV:00
General Description
The LD6909 is a micropower linear regulator, featuring
low-noise, low-dropout and high ripple rejection ration. The
precision of feedback reference voltage is within ±2% and
output current is up to 300mA. As well, the LD6909 can be
stable with an output capacitor of 1µF which reduces the
board space and cost.
The LD6909 is available in a space saving SOT23-5 or
SC70-6 package.
+Patent pending
Features
z Shutdown current <1µA
z Ultra-Fast Response in Load Transient
z Thermal Shutdown and Current Limiting Protection
z VOUT Discharge Function
z Stable with 1µF Output Capacitor
z Soft Start Operation
z Output Voltage: 1.8V to 3.3V (step 0.1V)
Applications
z Battery-Powered Equipment
z Hand-Held Instruments
Typical Application
V IN
1µF/X5R
C IN
22nF
V IN
CE
SS
OUT
V OU T
LD6909
GND
C O UT
1µF/X5R
Fig.1 Typical Application Circuit
Leadtrend Technology Corporation
LD6909-DS-01, May 2006
1

1 page

LD6909 pdf
LD6909
Typical Performance Characteristics
3.20
3.15
3.10
3.05
3.00
2.95
2.90-40 -20
0 20 40 60
Temperature (°C)
80 100
Fig. 2 Output Voltage vs. Temperature
VOUT
CE
VCSS
IIN
80
70
60
50
40
30
20
10 ILOAD=10mA
0
0.01
0.1 1
10 100 1000
Frequency (KHz)
Fig. 3 Ripple Rejection vs. Frequency
VOUT
250mA
IOUT
50mA
Fig. 4 Start Up Waveform CSS=22nF
Fig. 5 Load Transient Response
Leadtrend Technology Corporation
LD6909-DS-01, May 2006
5

5 Page



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