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| 型号： | TPS60401DBVTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 28 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | GREEN, PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 11/28页 |
| 文件大小： | 787K |
| 代理商： | TPS60401DBVTG4 |
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TPS60400, TPS60401, TPS60402, TPS60403
UNREGULATED 60mA CHARGE PUMP VOLTAGE INVERTER
SLVS324A JULY 2001 REVISED NOVEMBER 2004
19
WWW.TI.COM
APPLICATION INFORMATION
GaAs supply (continued)
RPMAX can be calculated using the following equation:
R
PMAX +
V
CO *
V
O
I
O
* R
O
With: VCO = 3.3 V; VO = 2.7 V; IO = 3 mA
RPMAX = 200 52 = 148
A 100-
resistor was selected for RP.
The reference voltage across R2 is 1.24 V typical. With 5-
A current for the voltage divider, R2 gets:
R2
+ 1.24 V
5
mA [
250 k
W
R1
+ 2.7 * 1.24 V
5
mA
[ 300 kW
With CP = 1 F the ratio VO/VI of the RC post filter is:
V
O
V
I
+
1
) (2p125000Hz
100
W
1
mF)
2
[ 0.01
step-down charge pump
By exchanging GND with OUT (connecting the GND pin with OUT and the OUT pin with GND), a step-down
charge pump can easily be formed. In the first cycle S1 and S3 are closed, and C(fly) with CO in series are
charged. Assuming the same capacitance, the voltage across C(fly) and CO is split equally between the
capacitors. In the second cycle, S2 and S4 close and both capacitors with VI/2 across are connected in parallel.
C(fly)
1
F
S2
S1
S3
S4
CO
1
F
VO (VI/2)
GND
VI
VO (VI/2)
+
Figure 34. Step-Down Principle
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
Figure 35. Step-Down Charge Pump Connection
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. For input voltages in the range of 6.5 V to 11 V, an additional Zener-diode is
recommended (see Figure 36).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS60401QDBVRQ1 | 功能描述:电荷泵 Auto Cat Unreg 60mA Chg Pump Vltg Invrtr RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60402 | 制造商:TI 制造商全称:Texas Instruments 功能描述:UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER |
| TPS60402DBV | 制造商:TI 制造商全称:Texas Instruments 功能描述:UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER |
| TPS60402DBVR | 功能描述:电荷泵 60mA Charge Pump Voltage Inverter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60402DBVRG4 | 功能描述:电荷泵 60mA Charge Pump Voltage Inverter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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