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LMZ30602RKGT Fiches technique(PDF) 9 Page - Texas Instruments

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No de pièce LMZ30602RKGT
Description  2A SIMPLE SWITCHER Power Module with 2.95V-6V Input in QFN Package
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LMZ30602RKGT Fiches technique(HTML) 9 Page - Texas Instruments

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LMZ30602
www.ti.com
SNVS997 – JULY 2013
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
The VADJ control sets the output voltage of the LMZ30602. The output voltage adjustment range is from 0.8V to
3.6V. 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 35) and AGND (pin 33 & 34). The SENSE+ pin (pin 36) 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 4) and AGND (pins 33 & 34).
Table 1 gives the standard external RSET resistor for a number of common bus voltages, along with the
recommended RRT resistor for that output voltage.
Table 1. Standard RSET Resistor Values for Common Output Voltages
RESISTORS
OUTPUT VOLTAGE VOUT (V)
0.8
1.2
1.5
1.8
2.5
3.3
RSET (kΩ)
open
2.87
1.65
1.15
0.673
0.459
RRT (kΩ)
1200
715
348
348
174
174
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)
0.8
open
1200
650
2.3
0.768
174
1500
0.9
11.8
1200
650
2.4
0.715
174
1500
1.0
5.83
1200
650
2.5
0.673
174
1500
1.1
3.83
1200
650
2.6
0.634
174
1500
1.2
2.87
715
750
2.7
0.604
174
1500
1.3
2.32
715
750
2.8
0.576
174
1500
1.4
1.91
715
750
2.9
0.549
174
1500
1.5
1.65
348
1000
3.0
0.523
174
1500
1.6
1.43
348
1000
3.1
0.499
174
1500
1.7
1.27
348
1000
3.2
0.475
174
1500
1.8
1.15
348
1000
3.3
0.459
174
1500
1.9
1.05
348
1000
3.4
0.442
174
1500
2.0
0.953
174
1500
3.5
0.422
174
1500
2.1
0.845
174
1500
3.6
0.412
174
1500
2.2
0.825
174
1500
Copyright © 2013, Texas Instruments Incorporated
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