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| LTC3115-2_15 Datasheet, PDF (34/42 Pages) Linear Technology – 40V, 2A Synchronous Buck-Boost DC/DC Converter | |||
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LTC3115-2
Typical Applications
Wide Input Voltage Range (10V to 40V) 1MHz 24V Supply at 400mA
10V TO 40V
UVLO
PROGRAMMED
TO 10V (1.3V
HYSTERESIS)
R1
953k
R2
130k
CBST1
0.1µF
L1
15µH
CBST2
0.1µF
CIN
4.7µF
RT
35.7k
BST1 SW1
PVIN
VIN
SW2 BST2
PVOUT
RUN
LTC3115-2
VC
RT
GND
FB
PWM/SYNC
PGND
PVCC
VCC
CO
10µF
RFB
CFB
4700pF
4.99k
C1
4.7µF
RTOP
1M
RBOT
43.2k
24V
500mA VIN ⥠12V
CFF 400mA VIN ⥠10V
47pF
RFF
4.99k
L1: WÃRTH 744 066 150
31152 TA03a
Maximum Load Current vs VIN
2.5
2.0
1.5
1.0
0.5
0
10
20
30
40
INPUT VOLTAGE (V)
31152 TA03b
Efficiency vs VIN
92
ILOAD = 0.5A
90
ILOAD = 1A
88
86
84
82
80
10
20
30
INPUT VOLTAGE (V)
40
31152 TA03c
34
Power-Up/Down Waveforms,
ILOAD = 0.5A
VIN
(5V/DIV)
VOUT
(10V/DIV)
INDUCTOR
CURRENT
(2A/DIV)
50ms/DIV
31152 TA03d
For more information www.linear.com/LTC3115-2
31152fa
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