LT3506/LT3506A
U
TYPICAL APPLICATIO S
1.8V and 1.2V Outputs with Sequencing
V
IN
4.5V TO 21V
D3a
D3b
22µF
V
V
IN2
IN1
BOOST1 BOOST2
LT3506
L1
4.7µH
L2
3.3µH
0.22µF
0.22µF
V
V
1.2V
1.5A
OUT1
1.8V
1.5A
OUT2
SW1
FB1
SW2
FB2
18.7k
16.2k
1500pF
1000pF
V
V
C2
C1
D1
D2
47µF
15k
15k
20k
32.4k
68µF
RUN/SS1 PGOOD1
RUN/SS2
4.7nF
3506 TA01
100k
PGOOD2
GND
PGOOD
D1, D2: ON SEMICONDUCTOR MBRS230LT3
D3: BAT-54A
OUTPUT CURRENTS CAN INCREASE TO 1.6A WHEN V >12V.
IN
L1: COILCRAFT MSS6122-472
L2: TDK SLF7028-3R3M
1.8V and 5V Outputs
V
OUT2
V
OUT3
–5V
V
IN
0.3A
7V TO 25V
D4
D3a
D3b
47k
22µF
22µF
V
V
IN2
IN1
BOOST1 BOOST2
LT3506
L2
4.7µH
L1
4.7µH
0.22µF
0.22µF
2.2µF
V
V
OUT1
1.8V
1.5A
OUT2
5V
SW1
FB1
SW2
FB2
0.6A
18.7k
69.8k
1500pF
1500pF
V
V
C2
C1
D1
D2
47µF
15k
15k
15k
13.3k
22µF
RUN/SS1
4.7nF
PGOOD2 RUN/SS2
3506 TA02
100k
2.2nF
PGOOD1
GND
PGOOD
D1: ON SEMICONDUCTOR MBRS230LT3
D2: ON SEMICONDUCTOR MBRM130LT3
D3: BAT-54A
L1: COILCRAFT MSS6122-472
L2: COILTRONICS CTX5-1A
I
SHOULD NEVER EXCEED 1/2 OF I
.
OUT2
OUT3
SEE DESIGN NOTE 100 FOR DETAILS ON
GENERATING DUAL OUTPUTS USING A BUCK
REGULATOR.
D4: ON SEMICONDUCTOR MBR0530
3506afb
ꢀꢈ
Linear [ Linear ]
