Datasheet

LTC3115-1
34
31151fb
For more information www.linear.com/LTC3115-1
Typical applicaTions
Wide Input Voltage Range (10V to 40V) 1MHz 24V Supply at 500mA
Maximum Load Current vs V
IN
Efficiency vs V
IN
Power-Up/Down Waveforms,
I
LOAD
= 0.5A
BST1 BST2
PV
IN
V
IN
RUN
PV
OUT
VC
FB
PV
CC
PWM/SYNC
V
CC
RT
SW1 SW2
GND PGND
LTC3115-1
L1
15µH
C
BST1
0.1µF
C
BST2
0.1µF
10V TO 40V
UVLO
PROGRAMMED
TO 10V (1.3V
HYSTERESIS)
C
FF
22pF
C1
4.7µF
24V
500mA
C
IN
10µF
C
O
10µF
R
TOP
1M
R
BOT
43.2k
L1: WÜRTH 744 066 150
31151 TA03a
R
T
35.7k
R1
953k
R2
130k
R
FF
10k
R
FB
10k
C
FB
3300pF
INPUT VOLTAGE (V)
10
LOAD CURRENT (A)
1.0
1.5
31151 TA03b
0.5
0
20
30
40
2.5
2.0
INPUT VOLTAGE (V)
10
80
EFFICIENCY (%)
82
84
86
88
I
LOAD
= 0.5A
I
LOAD
= 1A
92
20 30
31151 TA03c
40
90
V
IN
(5V/DIV)
V
OUT
(10V/DIV)
INDUCTOR
CURRENT
(2A/DIV)
50ms/DIV
31151 TA03d
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