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参数资料
| 型号： | L6731D |
| 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： | HTSSOP-16 |
| 文件页数： | 17/23页 |
| 文件大小： | 386K |
| 代理商： | L6731D |
L6731D
Summary description
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Summary description
The controller is an integrated circuit realized in BCD5 (BiCMOS-DMOS, version 5)
fabrication that provides complete control logic and protection for high performance
step-down DC-DC and niPoL 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 600 mV with a maximum
tolerance of ±0.8 %. If an external reference is used, it will be transferred divided by 2 to the
N.I. input of the error-amplifier, in accordance to the DDR memory specifications.
An internal resistor divider and a voltage buffer allow to achieve an accuracy of 1 % on both
Vtt and Vttref. It's possible to provide an external reference from 0V to 2.5 V in order to meet
the specification for DDRI and DDRII. The input voltage can range from 1.8 V to 14 V, while
the supply voltage can range from 4.5 V to 14 V. High peak current gate drivers provide for
fast switching to the external power section, and the output current can be in excess of 20 A.
The PWM duty cycle can range from 0 % to 100 % with a minimum on-time (TON, MIN) lower
than 100 ns making possible conversions with very low duty cycle at high switching
frequency. The device provides voltage-mode control that includes a selectable frequency
oscillator (250 kHz or 500 kHz).
The error amplifier features a 10 MHz gain-bandwidth-product and 5 V/s slew-rate that
permits to realize high converter bandwidth for fast transient response. 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.
When necessary, two different current limit protections can be externally set through two
external resistors. During the soft-start phase a constant current protection is provided while
after the soft-start the device enters in hiccup mode in case of over-current. The converter
can always sink current. Other features are power good, not latched over-voltage-protection,
feed-back disconnection and thermal shutdown. The HTSSOP16 package allows the
realization of really compact DC/DC converters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6731DTR | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6732 | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732C | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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