LTC1430CS8 查看數據表（PDF） - Linear Technology
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LTC1430CS8 Datasheet PDF : 16 Pages
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BLOCK DIAGRA
SHDN
DELAY
50µs
INTERNAL
SHUTDOWN
FREQSET
COMP
VCC
12µA
SS
ILIM
IMAX
12µA
PWM
FB
+–
MIN
40mV
1.26V
MAX
+
40mV
LTC1430
PVCC1
G1
PVCC2
G2
PGND
IFB
20.1k
12.4k
FB
SENSE+
SENSE –
LTC1430 • BD
TEST CIRCUITS
+
4.7µF
PVCC = 5V
+
100Ω
1µF
1N4148
+ CIN
220µF
×4
0.1µF
PVCC2 PVCC1
VCC
G1
SS
IMAX
0.01µF
LTC1430 IFB
NC
FREQSET G2
SHUTDOWN
SHDN PGND
0.1µF
M1A, M1B
2 IN PARALLEL
2.7µH/15A
M2
+ COUT
3.3V
330µF
×6
C1
220pF
COMP
GND
RC
7.5k
CC
4700pF
SENSE+
FB
SENSE–
NC
M1A, M1B, M2: MOTOROLA MTD20N03HL
CIN: AVX-TPSE227M010R0100
COUT: AVX-TPSE337M006R0100
Figure 1
FB MEASUREMENT
LTC1430
SENSE+
FB
SENSE–
VOUT
NC 1.61k
1k
NC
LTC1430 • F01
VSHDN VCC
PVCC
SHDN VCC PVCC2 PVCC1 IFB
NC
IMAX
G1
NC
NC
FREQSET LTC1430
NC
COMP
NC
SS
G2
NC
FB
NC
GND PGND SENSE– SENSE+
Figure 2
LTC1430 • TC02
5V
VCC PVCC1 PVCC2
G1
LTC1430
G2
GND
PGND
10µF
10,000pF
10,000pF
Figure 3
0.1µF
G1 RISE/FALL
G2 RISE/FALL
LTC1430 • TC03
5
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