參數(shù)資料
型號(hào)： L6725
廠(chǎng)商： 意法半導(dǎo)體
英文描述： Low cost adjustable step-down controller
中文描述： 低成本可調(diào)降壓控制器
文件頁(yè)數(shù)： 10/27頁(yè)
文件大?。?/td> 489K
代理商： L6725
L6725
Device description
10/27
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/μs 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 R
DS(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 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 V
CC
pin and the output (5V) is the V
CCDR
pin. The LDO can be by-passed, providing directly a 5V
voltage to V
CCDR
. In this case V
CC
and V
CCDR
pins must be shorted together as shown in
Figure 3
. V
CCDR
pin must be filtered
with a 1uF capacitor to sustain the internal LDO during the
recharge of the bootstrap capacitor.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6725_07 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Voltage mode PWM controller with bootstrap anti-discharging system
L6725A 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Vltg Mode 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(kāi)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
L6725ATR 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Step-Down 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(kāi)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
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(kāi)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(chēng):UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
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