ltc3602 Linear Technology Corporation, ltc3602 Datasheet - Page 6

• Manufacturer Part Number: ltc3602
• Description: 2.5a, 10v, Monolithic Synchronous Step-down Regulator
• Manufacturer: Linear Technology Corporation

PIN FUNCTIONS
BLOCK DIAGRAM
LTC3602
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.
R
I
V
SGND (Pin 17/Pin 9, Pin 21): Signal Ground.
RUN (Pin 6/Pin 10): Run Control Input. This pin may be
tied to PV
TRACK/SS (Pin 7/Pin 11): Tracking Input for the Controller
or Optional External Soft-Start Input. This pin allows the
start-up of V
using an external resistor divider. An external soft-start can
6
TH
T
FB
(Pin 3/Pin 6): Frequency Set Pin.
(Pin 4/Pin 7): Error Amplifi er Compensation Point.
(Pin 5/Pin 8): Feedback Pin.
IN
to enable the chip.
OUT
to “track” the external voltage at this pin
TRACK/SS
V
PGOOD
FB
0.54V
0.66V
1μA
0.6V
FE/UF Package
+
+
+
–
+
–
+
–
SOFT-START
REFERENCE
VOLTAGE
SYNC/MODE
1ms
AMPLIFIER
ERROR
+
–
OSILLATOR
I
TH
+
–
R
T
COMPARATOR
BURST
BCLAMP
COMPENSATION
RUN
RECOVERY
SLOPE
LOGIC
be programmed by connecting a capacitor between this
pin and ground. Leave this pin fl oating to use the internal
1ms soft-start clamp. Do not tie this pin to INTV
PV
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.
PV
this pin with a capacitor to PGND
INTV
Exposed Pad (Pin 17/Pin 21): SGND. Exposed pad is
signal ground and must be soldered to the PCB.
SYNC/MODE
I-COMPARATOR
IN
IN
OVER-CURRENT
.
COMPARATOR
COMPARATOR
CC
MAIN
(Pin 15/Pins 1,2): Power Input Supply. Decouple
REVERSE
COMPENSATION
(Pin 16/Pin 3): Output of Internal 5V LDO.
SLOPE
+
–
+
–
+
–
BOOST
INTV
CC
PGND
PGND
PGND
SW
SW
SW
PV
3602 BD
IN
CC
or to
3602f