Datasheet LTC3603 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 2.5A, 15V Monolithic Synchronous Step-Down Regulator |
| Pages / Page | 22 / 6 — typical perForMance characteristics. 5V LDO Output Voltage. TRACK/SS … |
| File Format / Size | PDF / 284 Kb |
| Document Language | English |
typical perForMance characteristics. 5V LDO Output Voltage. TRACK/SS Current. Load Regulation. vs Temperature
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LTC3603
typical perForMance characteristics 5V LDO Output Voltage TRACK/SS Current Load Regulation vs Temperature vs Temperature
0.10 5.10 1.40 FIGURE 6 CIRCUIT V 5.08 IN = 12V 5.06 1.35 5.04 0 1.30 (%) 5.02 OUT/V 5.00 1.25 4.98 ∆V OUT –0.10 4.96 1.20 LDO OUTPUT VOLTAGE (V) TRACK/SS CURRENT (µA) 4.94 1.15 4.92 –0.20 4.90 1.10 0 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 LOAD CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 3603 G18 3603 G19 3603 G20
pin Functions MSE/UF Package INTVCC (Pin 1/Pin 3):
Output of Internal 5V LDO.
TRACK/SS (Pin 9/Pin 11):
Tracking Input for the Controller
SYNC/MODE (Pin 2/Pin 4):
Mode Select and External Clock or Optional External Soft-Start Input. This pin allows the Synchronization Input. Do not leave this pin floating. start-up of VOUT to “track” the external voltage at this pin using an external resistor divider. An external soft-start can
PGOOD (Pin 3/Pin 5):
Power Good Output. Open-drain be programmed by connecting a capacitor between this logic output that is pulled to ground when the output volt- pin and ground. Leave this pin floating to use the internal age is not within ±10% of regulation point. 1ms soft-start clamp. Do not tie this pin to INTVCC or to
RT (Pin 4/Pin 6):
Frequency Set Pin. PVIN.
ITH (Pin 5/Pin 7):
Error Amplifier Compensation Point.
PGND (Pins 10, 11/Pins 12, 13, 14, 15):
Power Ground.
VFB (Pin 6/Pin 8):
Feedback Pin.
SW (Pins 12, 13/Pins 16, 17, 18, 19):
Switch Node Con-
SGND (Pin 7, Exposed Pad Pin 17/Pin 9, Exposed Pad
nection to the Inductor.
Pin 21):
Signal Ground. Exposed pad is signal ground and must be soldered to the PCB for rated thermal
BOOST (Pin 14/Pin 20):
Bootstrapped Supply to the Top performance. Side Floating Gate Driver.
RUN (Pin 8/Pin 10):
Run Control Input. This pin may be tied
PVIN (Pins 15, 16/Pins 1,2):
Power Input Supply. Decouple to PV this pin with a capacitor to PGND IN to enable the chip. Do not leave this pin floating. 3603fc 6 For more information www.linear.com/LTC3603
typical perForMance characteristics 5V LDO Output Voltage TRACK/SS Current Load Regulation vs Temperature vs Temperature
0.10 5.10 1.40 FIGURE 6 CIRCUIT V 5.08 IN = 12V 5.06 1.35 5.04 0 1.30 (%) 5.02 OUT/V 5.00 1.25 4.98 ∆V OUT –0.10 4.96 1.20 LDO OUTPUT VOLTAGE (V) TRACK/SS CURRENT (µA) 4.94 1.15 4.92 –0.20 4.90 1.10 0 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 LOAD CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 3603 G18 3603 G19 3603 G20
pin Functions MSE/UF Package INTVCC (Pin 1/Pin 3):
Output of Internal 5V LDO.
TRACK/SS (Pin 9/Pin 11):
Tracking Input for the Controller
SYNC/MODE (Pin 2/Pin 4):
Mode Select and External Clock or Optional External Soft-Start Input. This pin allows the Synchronization Input. Do not leave this pin floating. start-up of VOUT to “track” the external voltage at this pin using an external resistor divider. An external soft-start can
PGOOD (Pin 3/Pin 5):
Power Good Output. Open-drain be programmed by connecting a capacitor between this logic output that is pulled to ground when the output volt- pin and ground. Leave this pin floating to use the internal age is not within ±10% of regulation point. 1ms soft-start clamp. Do not tie this pin to INTVCC or to
RT (Pin 4/Pin 6):
Frequency Set Pin. PVIN.
ITH (Pin 5/Pin 7):
Error Amplifier Compensation Point.
PGND (Pins 10, 11/Pins 12, 13, 14, 15):
Power Ground.
VFB (Pin 6/Pin 8):
Feedback Pin.
SW (Pins 12, 13/Pins 16, 17, 18, 19):
Switch Node Con-
SGND (Pin 7, Exposed Pad Pin 17/Pin 9, Exposed Pad
nection to the Inductor.
Pin 21):
Signal Ground. Exposed pad is signal ground and must be soldered to the PCB for rated thermal
BOOST (Pin 14/Pin 20):
Bootstrapped Supply to the Top performance. Side Floating Gate Driver.
RUN (Pin 8/Pin 10):
Run Control Input. This pin may be tied
PVIN (Pins 15, 16/Pins 1,2):
Power Input Supply. Decouple to PV this pin with a capacitor to PGND IN to enable the chip. Do not leave this pin floating. 3603fc 6 For more information www.linear.com/LTC3603
