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参数资料
| 型号： | REG71050DDCT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 1000 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | GREEN, PLASTIC, TSOT-23, 6 PIN |
| 文件页数： | 23/24页 |
| 文件大小： | 796K |
| 代理商： | REG71050DDCT |
THEORY OF OPERATION
PEAK CURRENT REDUCTION
OFF
SWITCHED
Step-Down(Buck)Mode
OFF
ON
C
PUMP
Q
1
Q
3
Q
2
Q
4
C
IN
C
OUT
V
OUT
V
IN
Step-Up(Boost)Mode
(A)
(B)
OFF
ON
OFF
C
PUMP
Q
2
Q
4
C
OUT
V
OUT
C
PUMP
Q
2
Q
4
C
OUT
V
OUT
OFF
ON
Q
1
Q
3
ON
OFF
Q
1
Q
3
C
IN
V
IN
C
IN
V
IN
SBAS221G – DECEMBER 2001 – REVISED JANUARY 2009........................................................................................................................................... www.ti.com
During the second half cycle the FET switched are
The REG710 regulated charge pump provides a
configured as shown in Figure 19B, and the voltage
regulated output voltage for input voltages ranging
on CPUMP is added to VIN. The output voltage is
from less than the output to greater than the output.
regulated by skipping clock cycles as necessary.
This is accomplished by automatic mode switching
within the device. When the input voltage is greater
than the required output, the unit functions as a
variable
frequency
switch-mode
regulator.
This
In normal operation, the charging of the pump and
output capacitors usually leads to relatively high peak
Q3 are held off, Q4 is on, and Q2 is switched as
input currents which can be much higher than that of
needed to maintain a regulated output voltage.
the average load current. The regulator incorporates
circuitry to limit the input peak current, lowering the
When the input voltage is less than the required
total EMI production of the device and lowering
output voltage, the device switches to a step-up or
output voltage ripple and input current ripple. Input
boost mode of operation, as shown in Figure 19.
capacitor (CIN) supplies most of the charge required
A conversion clock of 50% duty cycle is generated.
by input current peaks.
During the first half cycle the FET switches are
configured as shown in Figure 19A, and CPUMP
charges to VIN.
Figure 18. Simplified Schematic of the REG710 Operating in the Step-Down Mode
Figure 19. Simplified Schematic of the REG710 Operating in the Step-Up or Boost Mode
8
Copyright 2001–2009, Texas Instruments Incorporated
Product Folder Link(s): REG710
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相关代理商/技术参数 |
参数描述 |
|---|---|
| REG71050DDCTG4 | 功能描述:电荷泵 60-mA 5.0V Buck/ Boost Charge Pump 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 |
| REG71050DRV | 制造商:TI 制造商全称:Texas Instruments 功能描述:60mA, 5.0V, Buck/Boost Charge Pump in ThinSOT-23 and ThinQFN |
| REG71050DRVR | 功能描述:电荷泵 60mA 5.0V Buck/Boost Charge Pump 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 |
| REG71050DRVRG4 | 功能描述:电荷泵 60mA 5.0V Buck/Boost Charge Pump 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 |
| REG71050DRVT | 功能描述:电荷泵 60mA 5.0V Buck/Boost Charge Pump 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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