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參數資料
| 型號： | MC34270FB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Output LDO, 250mA, Fixed(3.0V), Low Noise, Fast Transient Response 5-SOT-23 -40 to 85 |
| 中文描述： | 0.5 A DUAL SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | PLASTIC, QFP-32 |
| 文件頁數： | 5/12頁 |
| 文件大小： | 364K |
| 代理商： | MC34270FB |
MC34270 MC34271
5
MOTOROLA ANALOG IC DEVICE DATA
0
0
2.0
2.5
0
0.16
0
0
Vs
ISource, SWITCH OUTPUT CURRENT (mA)
Q
VDD, SUPPLY VOLTAGE (V)
F
ID, DRAIN CURRENT (mA)
O
I, CURRENT DRAW (mA)
Figure 3. Reference Voltage Change versus
Reference Current
Figure 4. Quiescent Current versus Supply Voltage
Figure 5. FET Drain Voltage versus Sink Current
Figure 6. ELD and DRV1 Switch Output Source
and Sink Saturation versus Current
VDD = 6.0 V
TA = 25
°
C
VDD = 6.0 V
TA = 25
°
C
VDD
Source Saturation
Vref
VA
EN1 and EN2 = 1
EN1 = 1 and EN2 = 0
RT = 169 k
No Loading
TA = 25
°
C
Standby Current
EN1 and EN2 = 0
Sink Saturation
1.5
2.0
1.0
0.5
0
– 5.0
–10
–15
– 20
– 25
– 30
0.12
0.08
0.04
–1.0
– 2.0
– 3.0
30
60
15
45
50
150
100
200
1.0
2.0
3.0
4.0
5.0
4.0
6.0
8.0
10
12
16
18
2.0
2.2
Vs
μ
S
1.4
1.8
1.0
0.6
0.2
1.5
1.0
0.5
14
0
– 4.0
0
VDD = 6.0 V
TA = 25
°
C
TA, AMBIENT TEMPERATURE (
°
C)
0
8.0
0
0.30
O
V
Figure 7. Vref and VA Variation
versus Temperature
TA, AMBIENT TEMPERATURE (
°
C)
Figure 8. Oscillator Frequency Variation
versus Temperature
0.25
0.20
0.15
0.10
0.05
0
– 0.05
– 0.10
6.0
4.0
2.0
0
– 2.0
– 4.0
– 6.0
– 8.0
10
20
30
40
50
60
70
10
20
30
40
50
60
70
VDD = 6.0 V
RT = 169 k
VDD = 6.0 V
Vref
VA
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