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参数资料
| 型号： | TPS84320RUQT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 390 kHz SWITCHING FREQ-MAX, PQCC47 |
| 封装： | 9 X 15 MM, 2.80 MM HEIGHT, GREEN, PLASTIC, QFN-47 |
| 文件页数： | 3/28页 |
| 文件大小： | 903K |
| 代理商： | TPS84320RUQT |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
( )
=
W
-
÷
÷
è
è
SET
OUT
1.43
R
k
V
1
0.8
SLUSAH7
– SEPTEMBER 2011
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
The VADJ control sets the output voltage of the TPS84320. The output voltage adjustment range is from 0.8V to
5.5V. The adjustment method requires the addition of RSET, which sets the output voltage, the connection of
SENSE+ to VOUT, and in some cases RRT which sets the switching frequency. The RSET resistor must be
connected directly between the VADJ (pin 43) and AGND (pin 45). The SENSE+ pin (pin 44) must be connected
to VOUT either at the load for improved regulation or at VOUT of the module. The RRT resistor must be
connected directly between the RT/CLK (pin 35) and AGND (pin 34).
Table 1 gives the standard external RSET resistor for a number of common bus voltages, along with the required
RRT resistor for that output voltage. For other output voltages, the value of the required resistor can either be
calculated using Equation 1, or selected from the values given in Table 2.
Table 1. Standard RSET Resistor Values for Common Output Voltages
RESISTORS
OUTPUT VOLTAGE VOUT (V)
0.8
1.0
1.2
1.5
1.8
2.5
3.3
5.0
RSET (k)
open
5.76
2.87
1.62
1.13
0.665
0.453
0.267
RRT (k)
open
324
158
105
(1)
Table 2. Standard RSET Resistor Values
VOUT (V)
RSET (k)
RRT(k)
fSW(kHz)
VOUT (V)
RSET (k)
RRT(k)
fSW(kHz)
0.8
open
330
3.2
0.475
191
580
0.9
11.3
open
330
3.3
0.453
158
630
1.0
5.76
open
330
3.4
0.442
158
630
1.1
3.83
open
330
3.5
0.422
158
630
1.2
2.87
324
480
3.6
0.402
158
630
1.3
2.26
324
480
3.7
0.392
158
630
1.4
1.91
324
480
3.8
0.374
137
680
1.5
1.62
324
480
3.9
0.365
137
680
1.6
1.43
324
480
4.0
0.357
137
680
1.7
1.27
324
480
4.1
0.348
137
680
1.8
1.13
324
480
4.2
0.332
118
730
1.9
1.02
324
480
4.3
0.324
118
730
2.0
0.953
324
480
4.4
0.316
118
730
2.1
0.866
324
480
4.5
0.309
118
730
2.2
0.806
324
480
4.6
0.301
118
730
2.3
0.750
324
480
4.7
0.294
118
730
2.4
0.715
324
480
4.8
0.287
105
780
2.5
0.665
324
480
4.9
0.280
105
780
2.6
0.634
237
530
5.0
0.267
105
780
2.7
0.604
237
530
5.1
0.267
105
780
2.8
0.562
237
530
5.2
0.261
105
780
2.9
0.536
237
530
5.3
0.255
105
780
3.0
0.511
191
580
5.4
0.249
105
780
3.1
0.499
191
580
5.5
0.243
105
780
Copyright
2011, Texas Instruments Incorporated
11
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