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LT3694 Datasheet(PDF) 29 Page - Linear Technology

Part # LT3694
Description  40V 400mA Step-Down Switching Regulator with Dual Fault Protected LDOs
PDF  34 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3694 Datasheet(HTML) 29 Page - Linear Technology

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LT3667
29
3667fb
For more information www.linear.com/LT3667
TYPICAL APPLICATIONS
5V, 3.3V and 2.5V Step-Down Converter with 100mA LDO Current Limits
Programming LDO Current Limits with a Digital/Analog Converter
EN2/ILIM2
EN3/ILIM3
GND
IN1
LT3667
BOOST
SW
DA
FB1
IN2
BD
2.5V*
IN3
OUT3
FB3
3667 TA04
ON OFF
EN
PG
RT
OUT2
f = 2MHz
FB2
*100mA CURRENT LIMIT
C1-C5: X5R OR X7R
L1: CDRH4D22/HP
UVLO1
C1
4.7µF
C2
0.1µF
D1
DFLS160
C6
22pF
L1
10µH
R1
931k
5V
200mA
3.3V*
R2
294k
R3
340k
R4
158k
R7
3.09k
R8
3.09k
R5
499k
R6
158k
RT
37.4k
VIN
8.5V TO 16V
TRANSIENT
TO 60V
C3
10µF
C4
4.7µF
C7
47nF
C8
47nF
C5
2.2µF
3.01k
3.01k
VDAC
DAC OUTPUT
0V TO 0.8V
47nF
EN2/ILIM2
LT3667
CURRENT LIMIT = 799
0.8V – VDAC
3.01k + 160
1.5k
IDAC
DAC OUTPUT
0µA TO 267µA
47nF
3667 TA05
EN2/ILIM2
LT3667
CURRENT LIMIT = 799
0.4V – IDAC • 1.5k
1.5k + 80



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