LTC3630_15 Datasheet, PDF (8/26 Pages) Linear Technology – High Efficiency, 65V 500mA Synchronous Step-Down Converter

LTC3630
Block Diagram
11 ^ISET
1.3V
ACTIVE: 5µA
SLEEP: 1µA
INTV_CC*
+
PEAK CURRENT
COMPARATOR
2M
RUN
5
SLEEP, ACTIVE: 2µA
SHUTDOWN: 0µA
+
1.21V –
LOGIC
AND
SHOOT-
THROUGH
PREVENTION
V_IN
3
V_IN
C_IN
SW
1
GND
16
L1
C_OUT
V_OUT
INTV_CC*
20µA
REVERSE CURRENT
COMPARATOR
FBO
12
14
GND
8
GND
17
FEEDBACK
COMPARATOR
VOLTAGE _INTVCC*
REFERENCE
70Ω
0.800V
SOFT-START
START-UP: 50µA
NORMAL: 5µA
SS
10
R1
V_FB
9
R2
V_PRG1
7
V_PRG2 V_PRG1
V_OUT
R1 R2
GND GND ADJUSTABLE 1.0M ∞
GND SS 5V FIXED 4.2M 800k
SS GND 3.3V FIXED 2.5M 800k
SS SS 1.8V FIXED 1.0M 800k
IMPLEMENT DIVIDER
EXTERNALLY FOR
ADJUSTABLE VERSION
V_PRG2
6
*WHEN V_IN > 5V, INTV_CC = 5V
WHEN V_IN ≤ 5V, INTV_CC FOLLOWS V_IN
3630 BD
3630fd
8
For more information www.linear.com/LTC3630