LTM4624 查看數據表（PDF） - Linear Technology

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LTM4624

14VIN, 4A Step-Down DC/DC µModule Regulator

Linear Technology 

LTM4624

Applications Information

Output voltage tracking can also be programmed externally

using the TRACK/SS pin. The output can be tracked up

and down with another regulator. Figure 2 and Figure 3

show an example waveform and schematic of ratiometric

tracking where the slave regulator’s output slew rate is

proportional to the master’s.

Since the slave regulator’s TRACK/SS is connected to

the master’s output through a RTR(TOP)/RTR(BOT) resistor

divider and its voltage used to regulate the slave output

voltage when TRACK/SS voltage is below 0.6V, the slave

MASTER OUTPUT

SLAVE OUTPUT

TIME

4624 F02

Figure 2. Output Ratiometric Tracking Waveform

VIN

4V TO 15V

10µF

16V

FREQ

VIN

VOUT

SVIN

RUN LTM4624

INTVCC

MODE

TRACK/SS

FB

PGOOD

COMP

GND SGND

47µF

6.3V

VOUT(MA)

1.5V

4A

RTR(TOP)

60.4k

RFB(MA)

40.2k

RTR(BOT)

40.2k

10µF

16V

FREQ

VIN

VOUT

SVIN

RUN LTM4624

INTVCC

MODE

TRACK/SS

FB

PGOOD

COMP

GND SGND

VOUT(SL)

1.2V

47µF 4A

6.3V

RFB(SL)

60.4k

4624 F03

Figure 3. Example Schematic of Ratiometric Output Voltage Tracking

For more information www.linear.com/LTM4624

4624fc

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