參數(shù)資料
型號： L6725ATR
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： SOP-16
文件頁數(shù)： 3/34頁
文件大?。?/td> 962K
代理商： L6725ATR
L6725 - L6725A
Device description
11/32
5.3
Bypassing the LDO to avoid the voltage drop with low Vcc
If VCC≈5V the internal LDO works in dropout with an output resistance of about 1. The
maximum LDO output current is about 100mA and so the output voltage drop is 100mV, to
avoid this the LDO can be bypassed.
5.4
Internal and external references
It is possible to set the internal/external reference and the switching frequency by setting the
proper voltage at the EAREF pin. The maximum value of the external reference depends on the
VCC: with VCC = 4V the clamp operates at about 2V (typ.), while with VCC greater than 5V the
maximum external reference is 2.5V (typ.).
●
VEAREF from 0% to 80% of VCCDR -> External reference/Fsw = 250KHz
●
VEAREF from 80% to 95% of VCCDR -> VREF = 0.6V/Fsw = 500KHz
●
VEAREF from 95% to 100% of VCCDR -> VREF = 0.6V/Fsw = 250KHz
Providing an external reference from 0V to 450mV the output voltage will be regulated but
some restrictions must be considered:
●
The minimum OVP threshold is set at 300mV;
●
The under-voltage-protection doesn't work;
To set the resistor divider it must be considered that a 100K pull-down resistor is integrated into
the device (see Figure 4.). Finally it must be taken into account that the voltage at the EAREF
pin is captured by the device at the start-up when VCC is about 4V.
Figure 3.
Bypassing the LDO
相關(guān)PDF資料
PDF描述
L6727TR 1.5 A SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8
L6727 1.5 A SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8
L6728AHTR SWITCHING CONTROLLER, PDSO10
L6730DTR 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
L6730D 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6725TR 功能描述:電壓模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
L6726 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726_08 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726_12 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726A 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Sngl phase PWM controller 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*