LT3473 查看數據表（PDF） - Linear Technology
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LT3473 Datasheet PDF : 12 Pages
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LT3473/LT3473A
BLOCK DIAGRA
FB
4
CTRL
3
ERROR
–
AMPLIFIER
+
gm
+
100mV
+––
A4
VREF
1.25V
7
6
VIN
SHDN
VC +
A1
BTH –
ENABLE
POWER SECTION
–
8
SW
CAP
1
PNP
DRIVER
Q2
OUT
2
PGOOD
5
Q5
GND
9
A2
+
RSQ
COMPARATOR
Q1
DRIVER
Σ
RAMP
GENERATOR
A3
1.2MHz
OSCILLATOR
3437 F01
Figure 1. LT3473 Block Diagram
FB
7
CTRL
8
ERROR
–
AMPLIFIER
+
gm
+
100mV
+––
VREF
1.25V
11
10
VIN
SHDN
VC +
A1
BTH –
ENABLE
POWER SECTION
A4
–
PGOOD
9
Q5
GND
13
A2
+
RQ
S
COMPARATOR
DRIVER
Σ
RAMP
GENERATOR
A3
1.2MHz
OSCILLATOR
12
SW
CAP
1
PNP
DRIVER
Q2
OUT
2
NB1
Q3
3
NE1
4
Q1
NB2
Q4
5
NE2
6
3437 F02
Figure 2. LT3473A Block Diagram
3473f
6
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