參數(shù)資料
型號(hào)： TPS60402DBVRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHED CAPACITOR CONVERTER, 70 kHz SWITCHING FREQ-MAX, PDSO5
封裝： GREEN, PLASTIC, SOT-23, 5 PIN
文件頁(yè)數(shù)： 9/28頁(yè)
文件大小： 787K
代理商： TPS60402DBVRG4
TPS60400, TPS60401, TPS60402, TPS60403
UNREGULATED 60mA CHARGE PUMP VOLTAGE INVERTER
SLVS324A JULY 2001 REVISED NOVEMBER 2004
17
WWW.TI.COM
APPLICATION INFORMATION
paralleling devices
Paralleling multiple TPS6040xs reduces the output resistance. Each device requires its own flying capacitor
(C(fly)), but the output capacitor (CO) serves all devices (see Figure 29). Increase CO’s value by a factor of n,
where n is the number of parallel devices. Equation 1 on page 3 shows the equation for calculating output
resistance.
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
F
CI
1
F
VO (VI)
GND
VI
GND
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
F
CO
2.2
F
+
Figure 29. Paralleling Devices
active-Schottky diode
For a short period of time, when the input voltage is applied, but the inverter is not yet working, the output
capacitor is charged positive by the load. To prevent the output being pulled above GND, a Schottky diode must
be added in parallel to the output. The function of this diode is integrated into the TPS6040x devices, which gives
a defined startup performance and saves board space.
A current sink and a diode in series can approximate the behavior of a typical, modern operational amplifier.
Figure 30 shows the current into this typical load at a given voltage. The TPS6040x devices are optimized to
start into these loads.
TPS60400
C1
C1+
53
OUT
IN
GND
1
2
4
CI
1
F
CO
1
F
C(fly)
1
F
Typical
Load
IO
VO (VI)
+V
V
VI
GND
60 mA
25 mA
0.4 V 1.25 V
5 V
Load Current
Voltage at the Load
0.4 V
Figure 30. Typical Load
Figure 31. Maximum Start-Up Current
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS60402DBVT 功能描述:電荷泵 60mA Charge Pump V RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60402DBVTG4 功能描述:電荷泵 60mA Charge Pump Voltage Inverter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60402QDBVRQ1 功能描述:電荷泵 Auto Cat Unreg 60mA Chg Pump Vltg Invrtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60403 制造商:TI 制造商全稱:Texas Instruments 功能描述:UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER
TPS60403DBV 制造商:TI 制造商全稱:Texas Instruments 功能描述:UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER
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