LTC3115-2_15 Datasheet, PDF (12/42 Pages) Linear Technology – 40V, 2A Synchronous Buck-Boost DC/DC Converter

LTC3115-2
Block Diagram Pin numbers are shown for the DHD package only.
14
PV_IN
A
15
2
SW1 SW2
D
BC
PGND PGND
3
PV_OUT
+
3A –
+
–1.5A –
CURRENT
LIMIT
REVERSE
CURRENT
LIMIT
+
0A –
ZERO
CURRENT
10
V_IN
REVERSE
BLOCKING
LDO
PV_CC* ₁₁
VC
6
FB
7
SOFT-START
1000mV
++–
RAMP
RT
8
PWM/SYNC
16
OSCILLATOR
MODE
SELECTION
GATE
DRIVES
V_IN
÷
PWM
1.21V
1000mV
BURST/PWM
(PWM MODE IF PWM/SYNC
IS HIGH OR SWITCHING)
CHIP
ENABLE
GND GND
EXPOSED
PAD
54
17
*PV_CC AND V_CC MUST BE CONNECTED TOGETHER IN THE APPLICATION
THE EXPOSED PAD IS AN ELECTRICAL CONNECTION AND MUST BE SOLDERED
TO THE BOARD AND ELECTRICALLY CONNECTED TO GROUND
PGND
BANDGAP
REFERENCE
BST2
12
BST1
13
V_{CC VCC*}
9
INPUT UVLO
V_IN
2.4V
V_IN
0.5µA
UVLO
RUN
1
1.21V
V_CC
2.4V
OVERTEMPERATURE
31152 BD
12
For more information www.linear.com/LTC3115-2
31152fa