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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)： | 2/34頁 |
| 文件大?。?/td> | 962K |
| 代理商： | L6725ATR |
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L6725 - L6725A
Device description
10/32
5
Device description
The controller provides complete control logic and protection for flexible and cost-effective DC-
DC converters. It is designed to drive N-Channel MOSFETs in a synchronous rectified buck
topology. The output voltage of the converter can be precisely regulated down to 600mV with a
maximum tolerance of ±0.8%, when the internal reference is used. The device allows also
using an external reference (0V to 2.5V) for the regulation. The device provides voltage-mode
control. The switching frequency can be set at two different values: 250KHz or 500KHz. The
error amplifier features a 10MHz gain-bandwidth-product and 5V/
s slew-rate that permits to
realize high converter bandwidth for fast transient response. The PWM duty cycle can range
from 0% to 100%. The device protects against over current conditions providing a constant-
current-protection during the soft-start phase and entering in HICCUP mode in all the other
conditions. The device monitors the current by using the RDS(ON) of both the high-side and low-
side MOSFET(s), eliminating the need for a current sensing resistor and guaranteeing an
effective over-current-protection in all the application conditions. Other features are over-
voltage-protection and thermal shutdown. The device is available in SO16N package.
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 4. 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. 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
recharge of the bootstrap capacitor.
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?fù)浣Y(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 |
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