LTC3521EFE View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3521EFE Datasheet PDF : 22 Pages
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Block Diagram (UF Package)
LTC3521
11
PVIN1
15
14
SW1A SW1B
A
INTERNAL
VCC
5 VIN
BC
PGND1A PGND1B
16
VOUT1
FILTER
+FORWIALIRMDIT 0.546V +
D
2.1A –
–
+
0.375A –
REVERSE ILIMIT
+
0A –
IZERO
PGOOD1
4
PVOUT
PWM
7
SHDN2
1
22 PVIN2
PVIN2
GATE
DRIVES
BUCK-BOOST
PWM
LOGIC
OSCILLATOR
UVLO
FB1
8
0.6V
SOFT-START
RAMP
SHDN1
10
SHDN3
9
PVIN2
SW2
20
GATE
DRIVES
BUCK
PWM
LOGIC
BUCK
PWM
LOGIC
GATE
DRIVES
SW3
17
FB2
24
PGND2
+
ZERO CROSSING
0A –
1.05A +
ILIMIT
–
+
SLOPE
COMPENSATION
–gm
+
0.60V ++
–
ZERO CROSSING
ILIMIT
PGND2
0A
1.05A
SLOPE
COMPENSATION
gm
FB3
23
0.60V
SOFT-START
RAMP
PGOOD2
3
0.546V
1.2V
0.6V
0.546V
0.25V
BANDGAP
REFERENCE
AND OT
SHUTDOWN
GND
PGND1A PGND1B
PGND2
6
21
12
18
SOFT-START
RAMP
–
+
0.546V
PGOOD3
2
3521 BD
For more information www.linear.com/LTC3521
3521fb
9
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