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LTC1504CS8 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1504CS8
Description  500mA Low Voltage Step-Down Synchronous Switching Regulator
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1504CS8 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC1504
PIN FUNCTIONS
during power-up. CSS also compensates the current limit
loop, allowing the LTC1504 to enter and exit current limit
cleanly. See the Applications Information section for more
details.
COMP (Pin 8): External Compensation. An external RC
network should be connected to COMP to compensate the
feedback loop. COMP is connected to the output of the
internal error amplifier.
TEST CIRCUITS
IMAX
SHDN
SS
COMP
VCC
GND
SW
FB/SENSE
+
CIN
VCC
NC
0.01
µF
+
COUT
VOUT
LEXT
CIN: AVX TPSE107M016R0125
COUT: SANYO 16CV220GX
LEXT: COILCRAFT D03316-473
1504 • TC01
LTC1504
1
µF
0.1
µF
220pF
7.5k
Figure 1
+
–
VREF
LTC1504
COMP
FB/SENSE
A
B
A: TEST VOL, IOL
B: TEST VOH, IOH
1504 • TC02
Figure 2
BLOCK DIAGRAM
Figure 3. Block Diagram
+
–
+–
MIN
+–
MAX
+–
FB
–+
ILIM
+
–
40mV
1.265V
12V
12V
PWM
12.6k
20.4k
Q1
Q2
SW
FB
(ADJ ONLY)
SENSE
(–3.3V ONLY)
SAW
IMAX
SS
COMP
SHDN
1504 • BD
+
– 40mV
VREF
VCC
TO INTERNAL BLOCKS



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