參數(shù)資料
型號(hào)： TPS60401DBVRG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHED CAPACITOR CONVERTER, 28 kHz SWITCHING FREQ-MAX, PDSO5
封裝： GREEN, PLASTIC, SOT-23, 5 PIN
文件頁(yè)數(shù)： 7/28頁(yè)
文件大?。?/td> 787K
代理商： TPS60401DBVRG4
TPS60400, TPS60401, TPS60402, TPS60403
UNREGULATED 60mA CHARGE PUMP VOLTAGE INVERTER
SLVS324A JULY 2001 REVISED NOVEMBER 2004
15
WWW.TI.COM
APPLICATION INFORMATION
Table 4. Measurement Results on the TPS60400 (Typical)
VI
[V]
IO(2)
[mA]
CI
[
F]
C(fly)
[
F]
CO
[
F]
LP
[
H]
CP
[
F]
BW = 500 MHz
VPOUT
BW = 20 MHz
VPOUT
VACeff [mV]
I
[V]
O(2)
[mA]
CERAMIC
P
[
H]
CERAMIC
VPOUT
VPP[mV]
VPOUT
VPP[mV]
POUT
VACeff [mV]
5
60
1
320
240
65
5
60
1
2.2
120
240
32
5
60
1
0.1 (X7R)
260
200
58
5
60
1
0.1
0.1 (X7R)
220
200
60
5
60
1
2.2
0.1
0.1 (X7R)
120
100
30
5
60
1
10
0.1
0.1 (X7R)
50
28
8
rail splitter
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
F
CO
1
F
CI
1
F
VO = VI/2
GND
VI
GND
C3
1
F
Figure 26. TPS60400 as a High-Efficiency Rail Splitter
A switched-capacitor voltage inverter can be configured as a high efficiency rail-splitter. This circuit provides a
bipolar power supply that is useful in battery powered systems to supply dual-rail ICs, like operational amplifiers.
Moreover, the SOT23-5 package and associated components require very little board space.
After power is applied, the flying capacitor (C(fly)) connects alternately across the output capacitors C3 and CO.
This equalizes the voltage on those capacitors and draws current from VI to VO as required to maintain the
output at 1/2 VI.
The maximum input voltage between VI and GND in the schematic (or between IN and OUT at the device itself)
must not exceed 6.5 V.
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