參數(shù)資料
型號(hào)： L7980
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 3.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 3 MM, 1.08 MM HEIGHT, ROHS COMPLIANT, VFQFPN-8
文件頁(yè)數(shù)： 4/44頁(yè)
文件大小： 1247K
代理商： L7980
Functional description
L7980
12/44
Doc ID 15181 Rev 3
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 6.4 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 5.
Uncompensated error amplifier characteristics
Low frequency gain
100dB
GBWP
4.5MHz
Slew rate
7V/
μs
Output voltage swing
0 to 3.3V
Maximum source/sink current
17mA/25mA
相關(guān)PDF資料
PDF描述
L7980TR 3.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
L7981ATR SWITCHING REGULATOR, DSO8
L7981TR SWITCHING REGULATOR, DSO8
L8219LP STEPPER MOTOR CONTROLLER, 2.5 A, PDSO28
L8219P STEPPER MOTOR CONTROLLER, 2.5 A, PDSO36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L7980A 制造商:STMicroelectronics 功能描述:Conv DC-DC Single Step Down 4.5V to 28V 8-Pin HSOP EP Tube 制造商:STMicroelectronics 功能描述:POWER CONVERSION - Rail/Tube 制造商:STMicroelectronics 功能描述:2A Step-Down Reg 2.5A 4.5 28V 250kHz 制造商:STMicroelectronics 功能描述:BUCK, 4.5-28V, 2A, 1MHZ, 0.6-28V, 8HSOP; Primary Input Voltage:28V; No. of Outputs:1; Output Current:2A; Voltage Regulator Case Style:HSOP; No. of Pins:8; Operating Temperature Min:-25C; Operating Temperature Max:125C; MSL:MSL 3 - ;RoHS Compliant: Yes 制造商:ST 功能描述:0
L7980ATR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2 A Step-Down Reg 4.5V to 28V 250 kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
L7980TR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A DC 4.5 V to 28 V Adj 0.6V 250 kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
L7981 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Step-Down Reg 3A DC 4.5-28V 250Khz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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
L7981A 制造商:STMicroelectronics 功能描述:POWER CONVERSION - Rail/Tube 制造商:STMicroelectronics 功能描述:3A Step-Down Reg 3.7A 4.5 to 28V 1MHz 制造商:ST 功能描述:3A STEP-DOWN SWITCHING REGULATOR
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