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| 型号： | TPS51317RGBR |
| 厂商： | Texas Instruments |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A 20VQFN |
| 标准包装： | 3,000 |
| 系列： | D-Cap+™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 2 V |
| 输入电压： | 4.5 V ~ 6.5 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 800kHz，1MHz，1.2MHz，1.5MHz |
| 电流 - 输出： | 6A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-VQFN（3.5x4.0） |
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V OUT
V IN SW
PWM Frequency and Adaptive on Time Control
1
t ON = ′
f
where
SLUSAH9 – MARCH 2011
?
f SW is the frequency selected by the connection of the MODE pin
(1)
The on-time pulse is sent to the top FET. The inductor current and the current feedback rises to peak value.
Each ON pulse is latched to prevent double pulsing. Switching frequency settings are shown in .
Non-Droop Configuration
The TPS51317 can be configured as a non-droop solution. The benefit of a non-droop approach is that load
regulation is flat, therefore, in a system where tight DC tolerance is desired, the non-droop approach is
recommended. For the Intel system agent application, non-droop is recommended as the standard configuration.
The non-droop approach can be implemented by connecting a resistor and a capacitor between the COMP and
the VREF pins. The purpose of the type II compensation is to obtain high DC feedback gain while minimizing the
phase delay at unity gain cross over frequency of the converter.
The value of the resistor (R C ) can be calculated using the desired unity gain bandwidth of the converter, and the
value of the capacitor (C C ) can be calculated by knowing where the zero location is desired. An application tool
that calculates these values is available from your local TI Field Application Engineer.
G MV = 1 mS
R C
C C
+
V SLEW
+
L OUT
–
R DS(on)
+
G MC = 1 mS
+
PWM
Driver
ESR
+
–
R LOAD
8 k W
VREF
Comparator
C OUT
R OUT
UDG-10190
Figure 4. Non-Droop Mode Basic Implementation
Figure 6 shows the transient response of TPS51317 using non-droop configuration, where C OUT = 6 x 22 μ F. The
applied step load is from 0 A to 3 A.
Copyright ? 2011, Texas Instruments Incorporated
Product Folder Link(s): TPS51317
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS51317RGBT | 功能描述:直流/直流开关转换器 3.3V/5Vin,6A,DCAP Mode Sync Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS51362RVER | 制造商:Texas Instruments 功能描述:22V INPUT, 10A INTEGRATED FET 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 10A 28VQFN |
| TPS51362RVET | 制造商:Texas Instruments 功能描述:22V INPUT, 10A INTEGRATED FET 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 10A 28VQFN |
| TPS51363 | 制造商:TI 制造商全称:Texas Instruments 功能描述:22-V Input, 8-A or 10-A Converter With Integrated FET |
| TPS51363RVER | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 3V to 22V 28-Pin VQFN EP T/R 制造商:Texas Instruments 功能描述:IC REG BCK SYNC ADJ 10/8A 28VQFN |
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