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參數(shù)資料
| 型號： | TPS40304DRCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 6/31頁 |
| 文件大?。?/td> | 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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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40304DRCT | 功能描述:DC/DC 開關控制器 3-20V Wide Input Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體: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:電源管理IC開發(fā)工具 Eval with NexFET Pwr MOSFETs RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS40305 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40305DRCR | 功能描述:DC/DC 開關控制器 3-20V Wide Input Sync Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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