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LMZ31506RUQT bảng dữ liệu(PDF) 11 Page - Texas Instruments

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tên linh kiện LMZ31506RUQT
Giải thích chi tiết về linh kiện  6A SIMPLE SWITCHER Power Module with 2.95V-14.5V Input and Current Sharing
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Trang chủ  http://www.ti.com
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LMZ31506RUQT bảng dữ liệu(HTML) 11 Page - Texas Instruments

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SET
OUT
1.43
R
k
V
1
0.6
LMZ31506
www.ti.com
SNVS993 – JUNE 2013
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
The VADJ control sets the output voltage of the LMZ31506. The output voltage adjustment range is from 0.6V 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 device. 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.
Table 1. Standard RSET Resistor Values for Common Output Voltages
RESISTORS
OUTPUT VOLTAGE VOUT (V)
0.9
1.0
1.2
1.8
2.5
3.3
5.0
RSET (kΩ)
2.87
2.15
1.43
0.715
0.453
0.316
0.196
RRT (kΩ)
261
261
200
200
165
121
86.6
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in Table 2.
(1)
Table 2. Standard RSET Resistor Values
VOUT (V)
RSET (kΩ)
RRT(kΩ)
fSW(kHz)
VOUT (V)
RSET (kΩ)
RRT(kΩ)
fSW(kHz)
0.6
open
open
250
3.1
0.348
140
580
0.7
8.66
590
330
3.2
0.332
140
580
0.8
4.32
590
330
3.3
0.316
121
630
0.9
2.87
261
430
3.4
0.309
121
630
1.0
2.15
261
430
3.5
0.294
121
630
1.1
1.74
261
430
3.6
0.287
121
630
1.2
1.43
200
480
3.7
0.280
121
630
1.3
1.24
200
480
3.8
0.267
107
680
1.4
1.07
200
480
3.9
0.261
107
680
1.5
0.953
200
480
4.0
0.255
107
680
1.6
0.866
200
480
4.1
0.243
107
680
1.7
0.787
200
480
4.2
0.237
95.3
730
1.8
0.715
200
480
4.3
0.232
95.3
730
1.9
0.665
200
480
4.4
0.226
95.3
730
2.0
0.619
200
480
4.5
0.221
95.3
730
2.1
0.576
200
480
4.6
0.215
95.3
730
2.2
0.536
200
480
4.7
0.210
95.3
730
2.3
0.511
200
480
4.8
0.205
86.6
780
2.4
0.475
200
480
4.9
0.200
86.6
780
2.5
0.453
200
480
5.0
0.196
86.6
780
2.6
0.432
165
530
5.1
0.191
86.6
780
2.7
0.412
165
530
5.2
0.187
86.6
780
2.8
0.392
165
530
5.3
0.182
86.6
780
2.9
0.374
165
530
5.4
0.178
86.6
780
3.0
0.357
140
580
5.5
0.174
86.6
780
Copyright © 2013, Texas Instruments Incorporated
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