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LTC3603EMSEPBF Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3603EMSEPBF
Description  2.5A, 15V Monolithic Synchronous Step-Down Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3603EMSEPBF Datasheet(HTML) 6 Page - Linear Technology

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LTC3603
6
3603fa
PIN FUNCTIONS
INTVCC (Pin 1/Pin 3): Output of Internal 5V LDO.
SYNC/MODE (Pin 2/Pin 4): Mode Select and External
Clock Synchronization Input.
PGOOD (Pin 3/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 4/Pin 6): Frequency Set Pin.
ITH (Pin 5/Pin 7): Error Amplifier Compensation Point.
VFB (Pin 6/Pin 8): Feedback Pin.
SGND (Pin 7, Exposed Pad Pin 17/Pin 9, Exposed Pad
Pin 21): Signal Ground. Exposed pad is signal ground
and must be soldered to the PCB for rated thermal
performance.
RUN (Pin 8/Pin 10): Run Control Input. This pin may be
tied to PVIN to enable the chip.
TRACK/SS (Pin 9/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 10, 11/Pins 12, 13, 14, 15): Power
Ground.
SW (Pins 12, 13/Pins 16, 17, 18, 19): Switch Node Con-
nection to the Inductor.
BOOST (Pin 14/Pin 20): Bootstrapped Supply to the Top
Side Floating Gate Driver.
PVIN (Pins15,16/Pins1,2):PowerInputSupply.Decouple
this pin with a capacitor to PGND
MSE/UF Package
Load Regulation
5V LDO Output Voltage
vs Temperature
TRACK/SS Current
vs Temperature
LOAD CURRENT (A)
0
–0.20
–0.10
0
0.10
0.5
1
1.5
2
3603 G18
2.5
3
FIGURE 6 CIRCUIT
VIN = 12V
TEMPERATURE (°C)
–50
4.90
4.92
4.96
4.98
5.00
5.10
5.04
0
50
75
3603 G19
4.94
5.06
5.08
5.02
–25
25
100
125
TEMPERATURE (°C)
–50
1.30
1.35
1.40
25
75
3603 G20
1.25
1.20
–25
0
50
100
125
1.15
1.10
TYPICAL PERFORMANCE CHARACTERISTICS


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