lt3579iufd-trpbf Linear Technology Corporation, lt3579iufd-trpbf Datasheet - Page 8

• Manufacturer Part Number: lt3579iufd-trpbf
• Description: Lt3579/lt3579-1 6a Boost/inverting Dc/dc Converter With Fault Protection Features
• Manufacturer: Linear Technology Corporation

LT3579/LT3579-1
BLOCK DIAGRAM
8
V
IN
C
SS
SHDN
SS
V
FB
IN
C
IN
1.33V
START
SOFT-
** SW OVERVOLTAGE PROTECTION IS NOT GUARANTEED TO PROTECT THE LT3579/LT3579-1 DURING SW OVERVOLTAGE EVENTS.
+
–
250k
REFERENCE
2.1V
1.215V
V
C
50mV
14.6k
14.6k
GATE
+
–
1.8V
+
–
+
–
A1
A2
UVLO
933μA
+
–
C
C
R
R
FAULT
FAULT
C
STARTUP
&
LOGIC
FAULT
DIE TEMP
L1
V
C
FREQUENCY
Figure 1. Block Diagram
FOLDBACK
DRIVER
DISABLE
165°C
16.2V
÷N
SYNC
D1
V
IN
ADJUSTABLE
OSCILLATOR
GENERATOR
BLOCK
SYNC
RAMP
∑
COMPARATOR
750mV
–
+
C
OUT1
R
RT
T
A3
SS
**
**
+
–
+
–
+
–
CLKOUT
SW1
42V (MIN)
SW2
42V (MIN)
I
3.4A (MIN)
R
SW1
GATE
OPTIONAL
M
R
1
SR1
S
TD ~ 30ns
Q
–
+
DRIVER
VBE • 0.9
A4
C
OUT
+
–
+
–
+
–
V
OUT
Q2
15.4m
12m
1.17V
45mV
GND
R
FB
SW2
SW1
S
Q1
3579 BD
35791f
R
FB