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LT3045 Datasheet(PDF) 40 Page - Analog Devices

Part # LT3045
Description  18V, 3A/5A Step-Down Silent Switcher 3 with Ultra-Low Noise Reference
PDF  44 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT3045 Datasheet(HTML) 40 Page - Analog Devices

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Data Sheet
LT83203/LT83205
analog.com
Rev. B
40 of 44
Figure 63. 5V 5A 1MHz Step-Down Converter with Soft-Start, Fast Start-Up and Power Good
Figure 64. Negative 5V 2A 1MHz Step-Down Converter with Soft-Start, Fast Start-Up and Power Good
Figure 65. Dynamic Output Voltage Control 1V to 5V 5A 400kHz Step-Down Converter with External DAC
1µF ×2
105kΩ
4.7µH
2.2µF
49.9kΩ
590Ω
453kΩ
49.9kΩ
0.1µF
1µF
8.2nF
0.22µF
0.22µF
22µF ×10
VIN
EN/UVLO
SET
RT
GND
VC
PGFB
OUTS
SW
LT83205
fSW = 1MHz
BST
INTVCC
VIN
GND
GND
L: XGL6060
VIN
7.5V TO 18V
5V
5A
VOUT
0805
X7R
16V
22µF ×5
PG
PIN(S) NOT USED IN THIS CIRCUIT:
SYNC/MODE
CSET: GCM21BR71C225KA64L
2.2µF
105kΩ
1µF
49.9kΩ
634Ω
453kΩ
49.9kΩ
0.1µF
1µF
33nF
0.22µF
100µF
22µF ×10
2.2µH
10µF
0.22µF
VIN
EN/UVLO
SET
RT
GND
VC
PGFB
OUTS
SW
LT83205
fSW = 1MHz
BST
INTVCC
VIN
GND
GND
VIN
5V TO 12V
−5V
2A
VOUT
0805
X7R
50V
PG
PIN(S) NOT USED IN THIS CIRCUIT:
SYNC/MODE
CSET: GCM21BR71H105KA03K
OPTIONAL
SCHOTTKY
DIODE
L: XGL4040
VOUT = (10 × VREF + 1) ÷ 11
1V TO 5V
5A
PIN(S) NOT USED IN THIS CIRCUIT:
PG, SYNC/MODE
*VREF SHOULD BE ABLE TO SOURCE
AND SINK 1mA CURRENT
10µF
287kΩ
1µF
10kΩ
309Ω
0.1µF
1µF
33nF
0.22µF
0.22µF
100µF
1kΩ
22µF ×10
2.2µH
VIN
EN/UVLO
VC
RT
GND
INTVCC
OUTS
SW
LT83205
fSW = 400kHz
BST
SET
VIN
GND
GND
VIN
12V
0805
X7R
25V
CSET: GRM219R71E105KA88D
PGFB
VREF*
1V TO 5.4V
L: XGL4040
DAC
0.5V OR INTVCC*
*NOTE THAT APPLICATIONS WITH DYNAMIC OUTPUT VOLTAGE CONTROL WILL NOT BE ABLE TO USE THE POWER GOOD AND
FAST START-UP FUNCTIONALITIES AND MUST TIE PGFB TO 0.5V TO DISABLE THESE FUNCTIONS CORRECTLY.



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