LTC3630A Datasheet, PDF (8/24 Pages) Linear Technology – High Efficiency, 76V 500mA Synchronous Step-Down Converter

LTC3630A
Block Diagram
11 ^ISET
1.3V
ACTIVE: 5µA
SLEEP: 1µA
5V
+
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
FBO
12
14
GND
8
GND
17
5V
20µA
REVERSE CURRENT
COMPARATOR
FEEDBACK
COMPARATOR
VOLTAGE _5V
REFERENCE
70Ω
0.800V
START-UP: 50µA
NORMAL: 5µA
SS
10
R1
R2
V_FB
9
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
3630a BD
3630af
8
For more information www.linear.com/LTC3630A