LTC3646-1_15 Datasheet, PDF (8/28 Pages) Linear Technology – 40V, 1A Synchronous Step-Down Converter

LTC3646/LTC3646-1
FUNCTIONAL BLOCK DIAGRAM
C_SVIN
RUN
+
1.21V –
MODE/SYNC
OSCILLATOR
RT
SVIN
+
4.5V –
5V REG
EXTV_CC
R_RT
V_ON
TG
ON-TIME CONTROLLER
t_ON
=
V_ON
V_IN • f_O
R
ON
SQ
CONTROL
LOGIC
I_CMP
ITH
R_COMP
C_COMP
+–
INTV_CC – 0.3V
+ ^EA_–
BG
+ ^IREV
–
SENSE⁺
SENSE^–
0.555V +
UV
–
+ OV
0.645V –
0.6V
REF
SOFT-START
C_PVIN
PVIN
INTV_CC
BOOST
SW
C_VCC
C_BOOST
L1
V_OUT
C_OUT
PGND
PGOOD
V_FB
R1
SGND
R2
3646 BD
36461fb
8
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