GM6155-3.3ST25R 데이터 시트보기 (PDF) - Unspecified
부품명
상세내역
제조사
GM6155-3.3ST25R Datasheet PDF : 8 Pages
| |||
GM6155
This equation is correct due to the configuration of the bandgap reference. The bandgap voltage is relative to
the output, as seen in the block diagram. Traditional regulators normally have the reference voltage relative to
ground and have a different VOUT equation.
Resistor values ate not critical because ADJ(adjust) has a high input impedance, but for best results use
resistors of 470kW or less. A capacitor from ADJ to ground provides greatly improved noise performance.
VIN
1
2
5
R1
VOUT
2.2µF
3
4
470pF
R2
Figure 5. Ultra-Low- Noise Adjustable Voltage Application
Figure 5 includes the optional 470pF noise bypass capacitor from ADJ to GND to reduce output noise.
Dual-Supply Operation
When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage
must be diode clamped to ground.
Typical Characteristics
0 VIN = 6V
VOUT = 5V
-20
0 VIN = 6V
VOUT = 5V
-20
-40
-40
-60
-60
-80
IOUT =100mA
-100
COUT = 1µF
10 100 1k 10k 100k 1M 10M
FREQUENCY(Hz)
Figure 6. Power Supply Rejection Ratio
-80
IOUT =100mA
COUT = 2.2µF
-100
CBYP = 0.01µF
10 100 1k 10k 100k 1M 10M
FREQUENCY(Hz)
Figure 7. Power Supply Rejection Ratio
320
10
280
125°C
1
240
100mA
200
25°C
0.1
160
-40°C
10mA
120
0.01
80
VOUT=5V
1mA
0.001 COUT=10µF
40
electrolytic
0
0.0001 CBYP=10nF
0
40
80
120
160
10 100 1k 10k 100k 1M 10M
OUTPUT CURRENT (mA)
FREQUENCY(Hz)
Figure 8. Dropout Voltage vs.
Output Current
Figure 9. Noise Performance
7
Share Link: 