參數(shù)資料
型號(hào): LP2951ACD
廠商: ON SEMICONDUCTOR
元件分類(lèi): 固定/可調(diào)正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述: Micropower Voltage Regulators
中文描述: FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.45 V DROPOUT, PDSO8
封裝: PLASTIC, SOIC-8
文件頁(yè)數(shù): 22/23頁(yè)
文件大?。?/td> 240K
代理商: LP2951ACD
LP2950, LP2951, NCV2951
http://onsemi.com
8
1
0
100
4.0
-40
1.8
1.0
80
V out
,OUTPUT
CURRENT
(mA)
Vin, INPUT VOLTAGE (V)
VOL
TAGE
NOISE
(
V/
Hz)√
f, FREQUENCY (Hz)
SHUTDOWN
THRESHOLD
VOL
TAGE
(V)
t, TEMPERATURE (
°C)
RIPPLE
REJECTION
(dB)
f, FREQUENCY (Hz)
TA = 25°C
CL = 1.0 mF
Vin = 6.0 V
Vout = 5.0 V
CL = 1.0 mF
μ
CL = 100 mF
IL= 0.1 mA
IL= 100 mA
TA = 25°C
VO = 5.0 V
LP2951C
Output “Off"
Output “On"
TA = 25°C
LP2951CN
60
40
20
0
3.0
2.0
1.0
0
80
60
40
20
0
1.4
1.0
0.8
1.2
1.6
10
100
1.0 k
10 k
100 k
1.0 k
10 k
100 k
-20
40
80
120
160
5.0
15
25
35
40
10
20
30
60
100
140
20
0
TA = 75°C
4.0
2.0
0
-2.0
-4.0
-6.0
OUTPUT
VOL
TAGE
CHANGE
(mV)
0.01
0.1
10
100
1000
10000
0
10
20
3040
50
60708090
100
Output Current (mA)
ESR
(ohms)
Unstable Region
Stable Region
Unstable Region for 0.1
mF capacitor only
100
mF
0.1
mF
Vout = 5 V
Lower unstable region is for 0.1
mF only.
1
mF and 100 mF show no instability with low ESR values.
0
200
LOAD
CURRENT
(mA)
t, TIME (ms)
Figure 12. Load Transient Response
4
2.5
0.5
1.5
2
3
3.5
1
150
100
0
-50
50
Vout
ILoad
OUTPUT
VOL
TAGE
CHANGE
(mV)
0
-200
200
400
-400
CL = 1.0 mF
Vout = 5.0 V
IL = 400 mA to 75 mA
TA = 25°C
Figure 13. Ripple Rejection
Figure 14. Output Noise
Figure 15. Shutdown Threshold Voltage
versus Temperature
Figure 16. Maximum Rated
Output Current
Figure 17. Output Stability versus Output Capacitor
Change
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