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參數資料
| 型號： | TPS54974PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 16 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數： | 20/21頁 |
| 文件大小： | 743K |
| 代理商： | TPS54974PWPR |
www.ti.com
APPLICATION INFORMATION
4.02 k
28
6
PVIN
24
23
22
21
20
PVIN
14
13
12
11
10
9
8
7
PH
5
BOOT
19
18
17
16
15
PGND
POWERPAD
AGND
VSENSE
COMP
PWRGD
SS/ENA
VIN
RT
27
26
VBIAS
25
4
3
2
1
U1
TPS54974PWP
0.047
F
C9
0.047
F
L1
0.65
H
C8
22
F
C10
22
F
C12
22
F
VO
3300 pF
PVIN
R7
2.4
C11
3300 pF
C7
22
F
C5
22
F
R6
71.5 k
C6
1
F
C3
R5
10 k
C4
R3
120 pF
C2
R2
383
1200 pF
C1
R1
10 k
R4
9.76 k
Analog and Power Grounds Are Tied at the Pad Under the Package of IC
2.2 - 4.0 V
1
F
VIN
3 - 4 V
C13
22
F
C14
COMPONENT SELECTION
OPERATING FREQUENCY
INPUT FILTER
R +
500 kHz
Switching Frequency
100 [kW]
(1)
FEEDBACK CIRCUIT
OPERATING WITH SEPARATE PVIN
TPS54974
SLVS458B – JANUARY 2003 – REVISED FEBRUARY 2005
Figure 10 shows the schematic diagram for a typical TPS54974 application. The TPS54974 (U1) can provide up
to 9 A of output current at a nominal outputvoltage of 1.8 V. For proper thermal performance, the exposed
thermal PowerPAD underneath the integrated circuit, TPS54974, package must be soldered to the printed-circuit
board.
Figure 10. Application Circuit
The resistor divider network of R1 and R4 sets the
output voltage for the circuit at 1.8 V. R1 along with
R2, R3, C1, C2, and C4 forms the loop compensation
The values for the components used in this design
network for the circuit. For this design, a Type-3
example were selected for best load transient re-
topology is used.
sponse and small PCB area. Additional design infor-
mation is available at www.ti.com.
In the application circuit, RT is grounded through a
71.5-k
resistor to select the operating frequency of
The PVIN input voltage is nominally at 2.5 VDC. The
700 kHz. To set a different frequency, place a 68-k
input filter consists of three 22-F ceramic capacitors
to 180-k
resistor between RT (pin 28) and analog
(C10, C12, and C13) which must be located as close
ground or leave RT floating to select the default of
as possible to the PVIN and PGND pins or the device
350 kHz. The resistance can be approximated using
to provide high-frequency decoupling. Ripple current
the following equation:
is carried in all three capacitors. The return path to
PGND must be made so as to avoid introducing
circulating currents in the output filter stage.
The values for these components are selected to
The TPS54974 is designed to operate with the power
provide fast transient response times.
stage (high-side and low-side MOSFETs) with the
8
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| TPS54974PWPRG4 | 功能描述:直流/直流開關調節器 Dl Inp Bus 3.3 2.5V 9A Output Synch Buck 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 |
| TPS54980 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
| TPS54980EVM-022 | 功能描述:電源管理IC開發工具 3.3/5Vin 9-A Seq DC/DC Conv Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54980PWP | 功能描述:直流/直流開關調節器 3.3V Inp Sync Buck 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 |
| TPS54980PWPG4 | 功能描述:直流/直流開關調節器 3.3V Input Synch Buck 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 |
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