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參數資料
| 型號： | TPS54110PWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數： | 29/30頁 |
| 文件大小： | 870K |
| 代理商： | TPS54110PWP |
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5
C3
+
RT
SYNC
SS/ENA
VBIAS
VIN
PGND
PwrPd
AGND
VSENSE
COMP
PWRGD
BOOT
PH
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
4
3
2
1
VIN (4.5 5.5 V)
C1
10 F
R7
10 k
U2
TPS54110PWP
PWRGD
R4
71.5 k
C5
.047 F
C4
0.1 F
C9
10 F
21
0.047 F
R3
19.1 k
C7
33 pF
C6
2700 pF
C8
2200 pF
R5
2.05 k
R1
10.7 k
R2
3.92 k
1
2
L1
6.8 H
3.3 V at 1.5 A
C2
100 F
s(kHz)
100
500kHz
RT(k ) =
W
SLVS500C
– DECEMBER 2003 – REVISED FEBRUARY 2011
APPLICATION INFORMATION
Figure 9 shows the schematic diagram for a typical TPS54110 application. The TPS54110 can provide up to
1.5 A of output current at a nominal output voltage of 3.3 V. For proper thermal performance, the exposed
PowerPAD underneath the device must be soldered down to the printed-circuit board.
Figure 9. Application Schematic
Design Procedure
The following design procedure can be used to select component values for the TPS54110. Alternately, the
SWIFT Designer Software can be used to generate a complete design. The SWIFT Designer Software uses an
iterative design procedure to access a comprehensive database of components when generating a design. This
section presents a simplified discussion of the design process.
Design Parameters
The required parameters to begin the design process and values for this design example are listed in Table 1.
Table 1. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Input voltage range
4.5 to 5.5 V
Output voltage
3.3 V
Input ripple voltage
100 mV
Output ripple voltage
30 mV
Output current rating
1.5 A
Operating frequency
700 kHz
As an additional constraint, the design is set up to be small size and low component height.
Switching Frequency
The switching frequency is set within the range of 280 kHz to 700 kHz by connecting a resistor from the RT pin
to AGND. Equation 1 is used to determine the proper RT value.
(1)
In this example, the timing-resistor value chosen for R4 is 71.5 k
Ω, setting the switching frequency to 700 kHz.
8
2003–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS54110
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS54110PWPG4 | 功能描述:直流/直流開關調節器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54110PWPR | 功能描述:直流/直流開關調節器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54110PWPRG4 | 功能描述:直流/直流開關調節器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54110-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 6-V INPUT, 1.5-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT?￡a) |
| TPS54110QPWPRQ1 | 功能描述:直流/直流開關調節器 3-6V Input 1.5A Out Synch Buck PWM Swer RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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