參數(shù)資料
型號： L6731BTR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝： HTSSOP-16
文件頁數(shù)： 2/24頁
文件大?。?/td> 439K
代理商： L6731BTR
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Device description
L6731B
10/24
5
Device description
5.1
Oscillator
The switching frequency can be fixed to two values: 250KHz or 500KHz by setting the proper
voltage at the EAREF pin (see Table 3. Pins function and section 4.3 Internal and external
reference).
5.2
Internal LDO
An internal LDO supplies the internal circuitry of the device. The input of this stage is the VCC
pin and the output (5V) is the VCCDR pin (Figure 3.).
The LDO can be by-passed, providing directly a 5V voltage to VCCDR. In this case VCC and
VCCDR pins must be shorted together as shown in Figure 4. VCCDR pin must be filtered with at
least 1F capacitor to sustain the internal LDO during the recharge of the bootstrap capacitor.
VCCDR also represents a voltage reference for PGOOD pin (see Table 3. Pins Function).
Figure 3.
LDO block diagram.
LDO
4.5V
÷14V
相關(guān)PDF資料
PDF描述
L6731B 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
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L6732_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
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