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参数资料
| 型号： | L6725A |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SOP-16 |
| 文件页数： | 2/34页 |
| 文件大小： | 962K |
| 代理商： | L6725A |
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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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6725ATR | 功能描述:开关变换器、稳压器与控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6725TR | 功能描述:电压模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| L6726 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726_08 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726_12 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
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