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參數資料
| 型號： | TPS54672PWPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數： | 19/20頁 |
| 文件大?。?/td> | 553K |
| 代理商： | TPS54672PWPG4 |
TPS54672
SLVS397C JULY 2001 REVISED FEBRUARY 2005
www.ti.com
8
APPLICATION INFORMATION
Figure 9 shows the schematic diagram for a typical DDR
memory or GTL bus termination application using the
TPS54672. The TPS54672 (U1) can provide greater than
6 A of output current. For proper operation, the exposed
thermal PowerPAD underneath the integrated circuit
package needs to be soldered to the printed-circuit board.
COMPONENT SELECTION
The values for the components used in this design
example were selected for best load transient and tracking
response. Additional design information is available at
www.ti.com.
INPUT VOLTAGE
The input voltage range is 3 to 5.5 VDC. The input filter
(C4) is a 10-
F ceramic capacitor (Taiyo Yuden). C8, also
a 10-
F ceramic capacitor (Taiyo Yuden) that provides
high frequency decoupling of the TPS54672 from the input
supply, must be located as close as possible to the device.
Ripple current is carried in both C8 and C4, and the return
path to PGND should avoid the current circulating in the
output capacitors C7 and C10.
FEEDBACK CIRCUIT
R1, R2, R3, C1, C2 and C3 form the loop compensation
network for the circuit. For this design, a Type 3 topology
is used. The compensation network, along with the output
filter inductor and capacitor delivers a crossover frequency
of 135 kHz with 50
° of phase margin.
OPERATING FREQUENCY
In the application circuit, RT is grounded through a 71.5-k
resistor to select the maximum frequency of 700 kHz. To
set a different frequency, place a 68-k
to 180-k resistor
between RT (pin 28) and analog ground or leave RT
floating to select the default 350 kHz. The resistance can
be calculated using the following equation:
R
+
500 kHz
SwitchingFrequency
100 [k
W]
28
27
26
25
24
23
22
21
20
19
18
17
16
RT
ENA
REFIN
VBIAS
VIN
15
PGND
STATUS
COMP
AGND
1
3
5
7
9
11
U1
TPS54672
C4
10
F
R2
4.75 k
C6
0.047
F
2
4
6
8
10
12
13
14
C9
0.1
F
R7
10 k
R6
10 k
VDDQ
C8
10
F
PwrPad
C2
2700 pF
C1
100 pF
R1
10 k
R3
182
C3
0.01
F
L1
0.56
H
C7
150
F
+
C10
150
F
+
C11
1
F
VTTQ
VSENSE
BOOT
PH
VIN
PGND
VI
Figure 9. Application Circuit Optimized For Size And Performance
(1)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS54672PWPR | 功能描述:直流/直流開關調節器 6-A Act Bus Term/DDR DC/DC 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 |
| TPS54672PWPR | 制造商:Texas Instruments 功能描述:IC SYNC PWM SWITCHER |
| TPS54672PWPRG4 | 功能描述:直流/直流開關調節器 6-A Act Bus Term/DDR DC/DC 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 |
| TPS54672PWRG4 | 制造商:Texas Instruments 功能描述: |
| TPS54673 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs |
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