LTC3520 Datasheet, PDF (10/24 Pages) Linear Technology – Synchronous 1A Buck-Boost and 600mA Buck Converters

LTC3520
BLOCK DIAGRAM
23
24
PV_IN1* PV_IN3*
A
22
SW1A
GATE
DRIVERS
B
20
SW1B
D
C
19
V_OUT1
0.56A
+
Gm
2A –
PGND1
PWM1
5
SD1
6
SD3
8
+
3A –
3 ^AIN
+
0.786V –
2 ^AOUT
INTERNAL
V_CC
1 ^SVIN*
SLOPE
COMPENSATION
+
FB2
14
SS2
13
–
0.790V ₊ Gm
+
5µA
PGND1
BUCK-
BOOST
PWM
LOGIC
BANDGAP
REFERENCE
THERMAL
SHUTDOWN
DISABLE
+
1.25A
–
+
–
BUCK
PWM
LOGIC
0.782V
FB1
18
SS1
17
5µA
V_{C1 15}
OSC
R_{T 4}
PV_IN2* ₉
SW2
10
PGND2
11
0A
SGND
16
PGND1
21
PWM2
12
SD2
7
*PINS SV_IN, PV_IN1, PV_IN2 AND PV_IN3 MUST BE CONNECTED TOGETHER IN THE APPLICATION.
3520 F02
3520f
10