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參數(shù)資料
| 型號： | L5973AD |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.3 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | EXPOSED PAD, HSOP-8 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 486K |
| 代理商： | L5973AD |
L5973AD
Functional description
Doc ID 9552 Rev 9
7/22
4
Functional description
The main internal blocks are shown in Figure 3, where is reported the device block diagram.
They are:
●
A voltage regulator that supplies the internal circuitry. From this regulator, a 3.3 V
reference voltage is externally available.
●
A voltage monitor circuit that checks the input and internal voltages.
●
A fully integrated sawtooth oscillator whose frequency is 500 kHz
●
Two embedded current limitations circuitries which control the current that flows
through the power switch. The Pulse by Pulse Current Limit forces the power switch
OFF cycle by cycle if the current reaches an internal threshold, while the Frequency
Shifter reduces the switching frequency in order to strongly reduce the duty cycle.
●
A transconductance error amplifier.
●
A pulse width modulator (PWM) comparator and the relative logic circuitry necessary to
drive the internal power.
●
An high side driver for the internal P-MOS switch.
●
An inhibit block for stand-by operation.
●
A circuit to realize the thermal protection function.
Figure 3.
Block diagram
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L5973AD_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A switch step down switching regulator |
| L5973AD_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 A switch step down switching regulator |
| L5973ADTR | 功能描述:直流/直流開關調節(jié)器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L5973D | 功能描述:開關變換器、穩(wěn)壓器與控制器 1.235 to 35V Step-Dn RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5973D_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.5 A switch step down switching regulator?癎 |
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