Datasheet

LTC3115-1
35
31151fb
For more information www.linear.com/LTC3115-1
Typical applicaTions
Industrial 12V 1MHz Regulator with Custom Input Undervoltage Lockout Thresholds
PWM Mode Efficiency
vs Load Current 0A to 1.5A Load Step, V
IN
= 24V
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
10µH
C
BST1
0.1µF
C
BST2
0.1µF
10V TO
40V
C
FF
33pF
C1
4.7µF
12V
1.4A
C
IN
10µF
C
O
22µF
R
TOP
1M
R
BOT
90.9k
C
IN
: MURATA GRM55DR61H106K
C
O
: TDK CKG57NX5R1H226M
L1: WÜRTH 744065100
31151 TA04a
R
T
35.7k
R
FF
10k
R
FB
40.2k
C
FB
820pF
R1
2M
R2
255k
ENABLED WHEN V
IN
REACHES 10.6V
DISABLED WHEN V
IN
FALLS BELOW 8.7V
LOAD CURRENT (A)
0.01
40
EFFICIENCY (%)
80
90
100
0.1 1
31151 TA04b
70
60
50
V
IN
= 10.6V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
OUT
(500mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
500µs/DIV
31151 TA04c
V
OUT
(500mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
500µs/DIV
31151 TA04d
0A to 1.5A Load Step, V
IN
= 10.6V 0A to 1.5A Load Step, V
IN
= 40V
V
OUT
(500mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
500µs/DIV
31151 TA04e
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