參數(shù)資料
型號(hào)： L5980
廠商： 意法半導(dǎo)體
英文描述： 0.7A step-down switching regulator
中文描述： 0.7A的降壓開(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 11/37頁(yè)
文件大?。?/td> 959K
代理商： L5980
Functional description
L5980
11/37
4.3
Error amplifier and compensation
The Error Amplifier (E/A) provides the error signal to be compared with the sawtooth to
perform the Pulse Width Modulation. Its non-inverting input is internally connected to a 0.6V
voltage reference, while its inverting input (FB) and output (COMP) are externally available
for feedback and frequency compensation. In this device the Error amplifier is a Voltage
Mode Operational Amplifier so with high DC gain and low output impedance.
The uncompensated Error Amplifier characteristics are the following:
In continuos conduction mode (CCM), the transfer function of the power section has two
poles due to the LC filter and one zero due to the ESR of the output capacitor. Different
kinds of compensation networks can be used depending on the ESR value of the output
capacitor. In case the zero introduced by the output capacitor helps to compensate the
double pole of the LC filter a type II compensation network can be used. Otherwise, a type
III compensation network has to be used (see
Chapter 5.4
for details about the
compensation network selection).
Anyway the methodology to compensate the loop is to introduce zeros to obtain a safe
phase margin.
Table 4.
Uncompensated Error Amplifier characteristics
Low frequency gain
100dB
GBWP
4.5MHz
Slew rate
7V/
μ
s
Output voltage swing
0 to 3.3V
Maximum source/sink current
25mA/40mA
相關(guān)PDF資料
PDF描述
L5980TR 0.7A step-down switching regulator
L5985 2A step-down switching regulator
L5985TR 2A step-down switching regulator
L5991 PRIMARY CONTROLLER WITH STANDBY
L5991A PRIMARY CONTROLLER WITH STANDBY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5980_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:0.7 A step-down switching regulator
L5980TR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 700mA Step-Down Switching Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5980TR-CUT TAPE 制造商:ST 功能描述:L5980 Series 15 V 250 kHz 0.7 A Step Down Switching Regulator - VFQFPN-8
L5981 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1A STEP-DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5981_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1 A step-down switching regulator
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*