LTC3646-1_15 Datasheet, PDF (24/28 Pages) Linear Technology – 40V, 1A Synchronous Step-Down Converter

LTC3646/LTC3646-1
TYPICAL APPLICATIONS
24V Input to 5V Output at 1MHz Frequency and EXTV_CC
V_IN
24V
2Ω
PVIN
SVIN
RUN
BOOST
LTC3646
100k
22µF
INTV_CC
SW
PGOOD
ITH
2.2µF
4.7µF
R_COMP
100k
RT
SWITCH ^VON
MODE/SYNC ^CONTROL
EXTV_CC
90.9k
C_COMP
33pF
0.6V
SGND
+ – _VFB
PGND
0.1µF
L1
10µH
V_OUT
5V
C_OUT
30µF
487k
20pF
66.5k
3646 TA03a
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency Curve
0.01
0.1
LOAD CURRENT (A)
1
3646 TA03b
50mA to 1A Load Step
I_LOAD
1A/DIV
I_L1
1A/DIV
V_OUT
200mV/DIV
AC-COUPLED
40µs/DIV
3646 TA03c
24
For more information www.linear.com/LTC3646
36461fb