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LTC3602 Arkusz danych(PDF) 6 Page - Linear Technology

Numer części LTC3602
Szczegółowy opis  2.5A, 10V, Monolithic Synchronous Step-Down Regulator
PDF  20 Pages
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTC3602 Arkusz danych(HTML) 6 Page - Linear Technology

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LTC3602
6
3602fb
BLOCK DIAGRAM
PIN FUNCTIONS
SYNC/MODE (Pin 1/Pin 4): Mode Select and External
Clock Synchronization Input.
PGOOD (Pin 2/Pin 5): Power Good Output. Open-drain
logic output that is pulled to ground when the output volt-
age is not within ±10% of regulation point.
RT (Pin 3/Pin 6): Frequency Set Pin.
ITH (Pin 4/Pin 7): Error Amplifier Compensation Point.
VFB (Pin 5/Pin 8): Feedback Pin.
SGND (Pin 17/Pin 9, Pin 21): Signal Ground.
RUN (Pin 6/Pin 10): Run Control Input. This pin may be
tied to PVIN to enable the chip.
TRACK/SS (Pin 7/Pin 11): Tracking Input for the Controller
or Optional External Soft-Start Input. This pin allows the
start-up of VOUT to “track” the external voltage at this pin
using an external resistor divider. An external soft-start can
be programmed by connecting a capacitor between this
pin and ground. Leave this pin floating to use the internal
1ms soft-start clamp. Do not tie this pin to INTVCC or to
PVIN.
PGND (Pins 8, 9, 10/Pins 12, 13, 14, 15): Power
Ground.
SW (Pins 11, 12, 13/Pins 16, 17, 18, 19): Switch Node
Connection to the Inductor.
BOOST (Pin 14/Pin 20): Bootstrapped Supply to the Top
Side Floating Gate Driver.
PVIN (Pin 15/Pins 1,2): Power Input Supply. Decouple
this pin with a capacitor to PGND
INTVCC (Pin 16/Pin 3): Output of Internal 5V LDO.
Exposed Pad (Pin 17/Pin 21): SGND. Exposed pad is
signal ground and must be soldered to the PCB.
RUN
RT
SYNC/MODE
BOOST
ITH
INTVCC
PVIN
3602 BD
LDO
SW
SW
PGND
PGND
PGOOD
VFB
TRACK/SS
LOGIC
SLOPE
COMPENSATION
RECOVERY
VOLTAGE
REFERENCE
1ms
SOFT-START
OSILLATOR
SLOPE
COMPENSATION
PGND
SW
–
+
+
+
–
+
–
+
–
+
–
+
–
+
–
+
+
–
1μA
0.6V
0.54V
0.66V
ERROR
AMPLIFIER
BURST
COMPARATOR
OVER-CURRENT
COMPARATOR
REVERSE
COMPARATOR
MAIN
I-COMPARATOR
BCLAMP
SYNC/MODE
FE/UF Package



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