參數資料
型號: TAR5S40U
廠商: Toshiba Corporation
英文描述: Point Regulators (Low-Dropout Regulator)
中文描述: 點穩(wěn)壓器(低壓差穩(wěn)壓器)
文件頁數: 6/23頁
文件大小: 632K
代理商: TAR5S40U
TAR5S15U~TAR5S50U
2003-02-10
6
3. Ripple Rejection
The devices of the TAR5SxxU Series feature a circuit with an excellent ripple rejection characteristic.
Because the circuit also features an excellent output fluctuation characteristic for sudden supply voltage drops,
the circuit is ideal for use in the RF blocks incorporated in all mobile telephones.
4. NOISE Pin
TAR5SxxU Series devices incorporate a NOISE pin to reduce output noise voltage. Inserting a capacitor
between the NOISE pin and GND reduces output noise. To ensure stable operation, insert a capacitor of
0.0047
μ
F or more between the NOISE pin and GND.
The output voltage rise time varies according to the capacitance of the capacitor connected to the NOISE
pin.
Ripple Rejection
f
TAR5S28U Input Transient Response
Frequency f (Hz)
Time t (ms)
R
0
10
100
1 k
10 k
100 k 300 k
10
20
30
40
50
60
70
80
10
μ
F
2.2
μ
F
1
μ
F
VIN
=
4.0 V, CNOISE
=
0.01
μ
F,
CIN
=
1
μ
F, Vripple
=
500 mVp
p,
Iout
=
10 mA, Ta
=
25°C
C
NOISE
V
N
Turn On Waveform
NOISE capacitance CNOISE (F)
Time t (ms)
C
V
C
O
μ
V
0
10
20
30
40
50
60
0.001
μ
0.01
μ
1.0
μ
TAR5S50
0.1
μ
TAR5S30
TAR5S15
CIN
=
1
μ
F, Cout
=
10
μ
F,
Iout
=
10 mA, Ta
=
25°C
O
V
0
1
4
5
8
10
Input voltage
2.8 V
2
3
6
7
9
Output voltage
3.1 V
3.4 V
Ta
=
25°C, CIN
=
1
μ
F,
Cout
=
10
μ
F, CNOISE
=
0.01
μ
F,
VIN: 3.4 V
3.1 V, Iout
=
50 mA
40
10
20
0
10
1
2
3
1
2
0
90
30
0
60
50
80
70
Output voltage waveform
Control voltage waveform
CNOISE
=
0.01
μ
F
1
μ
F
0.33
μ
F
0.1
μ
F
CIN
=
1
μ
F, Cout
=
10
μ
F,
Iout
=
50 mA, Ta
=
25°C
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TAR5S41U Point Regulators (Low-Dropout Regulator)
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