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| 型号： | TPS40304DRCR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 6/31页 |
| 文件大小： | 1798K |
| 代理商： | TPS40304DRCR |
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SLUS964 – NOVEMBER 2009
www.ti.com
DESIGN EXAMPLES
Design Example 1: Using the TPS40305 for a 12 V to 1.8 V Point-of-Load Synchronous Buck
Regulator
12 V to 1.8 V Point-of-Load Synchronous Buck Regulator
The following example illustrates the design process and component selection for a 12 V to 1.8 V point-of-load
synchronous buck regulator using the TPS40305.
Table 1. Design Example Electrical Characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN
Input voltage
8
14
V
VIN(ripple)
Input ripple voltage
IOUT = 10 A
0.6
V
VOUT
Output voltage
0 A
≤ IOUT ≤ 10 A
1.764
1.800
1.836
V
Line regulation
8 V
≤ VIN ≤ 14 V
0.5%
Load regulation
0 A
≤ IOUT ≤ 10 A
0.5%
VRIPPLE
Output voltage ripple
IOUT = 10 A
36
mV
VOVER
Output overshoot
IOUT falling from 7 A to 3 A
100
mV
VUNDER
Output undershoot
IOUT rising from 3 A to 7 A
100
mV
IOUT
Output current
4.5 V
≤ VIN ≤ 5.5 V
0
10
A
tSS
Soft start time
VIN = 12 V
1.5
ms
ISCP
Short circuit current trip point
13
15
A
f SW
Switching frequency
1200
kHz
η
Efficiency
VIN = 12 V, IOUT = 5 A
90%
η
Full load efficiency
VIN = Nom, IOUT = Max
80%
Figure 14. TPS40305 Design Example Schematic
The list of materials for this application is shown in Table 3. The loop response and efficiency from boards built
using this design are shown in Figure 15 and Figure 16. Gerber Files and additional application information are
available from the factory.
Design Procedure
Selecting the Switching Frequency
To achieve the small size for this design the TPS40305, with f SW = 1200 kHz, is selected for minimal external
component size.
14
Copyright 2009, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40304DRCT | 功能描述:DC/DC 开关控制器 3-20V Wide Input Synch Buck Cntrlr 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 |
| TPS40304DRCT | 制造商:Texas Instruments 功能描述:Synchronous Buck Controller IC 制造商:Texas Instruments 功能描述:IC, SYNC BUCK CONTROLLER, SON-10 |
| TPS40304EVM-353 | 功能描述:电源管理IC开发工具 Eval with NexFET Pwr MOSFETs RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS40305 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40305DRCR | 功能描述:DC/DC 开关控制器 3-20V Wide Input Sync Buck 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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