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| 型号： | TPS70758PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 24/38页 |
| 文件大小： | 626K |
| 代理商： | TPS70758PWPR |
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LDO
Vin
VESR
Iout
RESR
Cout
RLOAD
Vout
+
TPS70745, TPS70748
TPS70751, TPS70758
TPS70702
SLVS291D – MAY 2000 – REVISED DECEMBER 2007
Figure 44 shows the output capacitor and its parasitic resistances in a typical LDO output stage.
Figure 44. LDO Output Stage with Parasitic Resistances ESR
In steady state (dc state condition), the load current is supplied by the LDO (solid arrow) and the voltage across
the capacitor is the same as the output voltage (V(CO) = VOUT). This condition means no current is flowing into the
CO branch. If IOUT suddenly increases (a transient condition), the following results occur:
The LDO is not able to supply the sudden current need because of its response time (t
1 in Figure 45).
Therefore, capacitor CO provides the current for the new load condition (dashed arrow). CO now acts like a
battery with an internal resistance, ESR. Depending on the current demand at the output, a voltage drop
When C
O is conducting current to the load, initial voltage at the load will be VO = V(CO) – VESR. As a result of
the discharge of CO, the output voltage VO drops continuously until the response time t1 of the LDO is
reached and the LDO resumes supplying the load. From this point, the output voltage starts rising again until
30
Copyright 2000–2007, Texas Instruments Incorporated
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相关代理商/技术参数 |
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| TPS70758PWPRG4 | 功能描述:低压差稳压器 - LDO Dual-Output LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS708 | 制造商:Toshiba 功能描述:Photodiode PIN Chip 850nm 2-Pin 0-5A1 |
| TPS70802 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS |
| TPS70802PWP | 功能描述:低压差稳压器 - LDO Dual Adj 250/125mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS70802PWP | 制造商:Texas Instruments 功能描述:IC DUAL ADJ LDO 20-HTSSOP 制造商:Texas Instruments 功能描述:IC, DUAL ADJ LDO 20-HTSSOP |
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