参数资料
| 型号： | TPS75315QPWPREP |
| 厂商： | Texas Instruments |
| 文件页数： | 17/33页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.5V 1.5A 20HTSSOP |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.5V |
| 输入电压： | 2.7 V ~ 5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A（最小值） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-HTSSOP |
| 包装： | 标准包装 |
| 其它名称： | 296-22506-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页
TPS75101 EP, '75115 EP, '75118 EP, '75125 EP, '75133 EP WITH POWER GOOD
TPS75301 EP, TPS75315 EP, TPS75318 EP, TPS75325 EP, TPS75333 EP WITH RESET
FAST TRANSIENT RESPONSE 1.5 A LOW DROPOUT VOLTAGE REGULATORS
SGLS158 ? APRIL 2003
APPLICATION INFORMATION
In most cases one can neglect the effect of inductive impedance ESL. Therefore, the following application focuses
mainly on the parasitic resistance ESR.
Figure 22 shows the output capacitor and its parasitic impedances in a typical LDO output stage.
I O
LDO
+
V ESR
?
R ESR
V I
R LOAD
V O
C O
Figure 22. LDO Output Stage With Parasitic Resistances ESR and ESL
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(C O ) = V O ). This means no current is flowing into the C O branch. If
I O suddenly increases (transient condition), the following occurs:
D The LDO is not able to supply the sudden current need due to its response time (t 1 in Figure 23). Therefore,
capacitor C O provides the current for the new load condition (dashed arrow). C O now acts like a battery with
an internal resistance, ESR. Depending on the current demand at the output, a voltage drop will occur at R ESR .
This voltage is shown as V ESR in Figure 22.
D When C O is conducting current to the load, initial voltage at the load will be V O = V(C O ) – V ESR . Due to the
discharge of C O , the output voltage V O will drop continuously until the response time t 1 of the LDO is reached
and the LDO will resume supplying the load. From this point, the output voltage starts rising again until it reaches
the regulated voltage. This period is shown as t 2 in Figure 23.
Figure 23 also shows the impact of different ESRs on the output voltage. The left brackets show different levels of
ESRs where number 1 displays the lowest and number 3 displays the highest ESR.
From above, the following conclusions can be drawn:
D The higher the ESR, the larger the droop at the beginning of load transient.
D The smaller the output capacitor, the faster the discharge time and the bigger the voltage droop during the LDO
response period.
POST OFFICE BOX 655303
? DALLAS, TEXAS 75265
17
相关PDF资料 |
PDF描述 |
|---|---|
| TPS75301QPWPREP | IC REG LDO ADJ 1.5A 20HTSSOP |
| NCP4671DSN12T1G | IC REG LDO 1.2V .4A SOT-23-5 |
| ESC28DRTS-S734 | CONN EDGECARD 56POS DIP .100 SLD |
| ACC15DRTI-S734 | CONN EDGECARD 30POS DIP .100 SLD |
| HMC18DRYN-S13 | CONN EDGECARD 36POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS75315QPWPRG4 | 功能描述:低压差稳压器 - LDO Fast-Tran-Resp 1.5-A 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 |
| TPS75315QPWPRQ1 | 功能描述:低压差稳压器 - LDO Fast-Trans-Resp 1.5A LDO Vltg Reg 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 |
| TPS75318QPWP | 功能描述:低压差稳压器 - LDO Fast-Tran-Resp 1.5-A 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 |
| TPS75318QPWPG4 | 功能描述:低压差稳压器 - LDO Fast-Tran-Resp 1.5-A 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 |
| TPS75318QPWPR | 功能描述:低压差稳压器 - LDO Fast-Tran-Resp 1.5-A 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 |
发布紧急采购，3分钟左右您将得到回复。