LT3971IDD 查看數據表（PDF） - Linear Technology
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LT3971IDD Datasheet PDF : 28 Pages
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BLOCK DIAGRAM
LT3971/LT3971-3.3/LT3971-5
VIN
C1
RT
VIN
INTERNAL 1.19V REF
1V +
– SHDN
EN
RT
–
+
Σ
SLOPE COMP
OSCILLATOR
200kHz TO 2MHz
SYNC
PG
1.09V
ERROR AMP
+
–
Burst Mode
DETECT
VC CLAMP
VC
C5
GND
FB
R2
R1
R2 R1
LT3971-3.3
LT3971-5
ONLY
VOUT
SWITCH
LATCH
R
Q
S
BD
BOOST
SW
1µA
SS
SHDN
LT3971
ONLY C5
LT3971-3.3: R1 = 6.39M, R2 = 3.61M
LT3971-5: R1 = 7.62M, R2 = 2.38M
C3
L1
D1
VOUT
C2
R3
C4
3991 BD
3971fd
9
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