LTM4620E Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LTM4620E

Dual 13A or Single 26A DC/DC µModule Regulator

Linear Technology 

LTM4620

PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.)

RUN1, RUN2 (F5, F9): Run Control Pin. A voltage above

1.25V will turn on each channel in the module. A voltage

below 1.25V on the RUN pin will turn off the related chan-

nel. Each RUN pin has a 1µA pull-up current, once the

RUN pin reaches 1.2V an additional 4.5µA pull-up current

is added to this pin.

DIFFOUT (F8): Internal Remote Sense Amplifier Output.

Connect this pin to VOUTS1 or VOUTS2 depending on which

output is using remote sense. In parallel operation con-

nect one of the VOUTS pin to DIFFOUT for remote sensing.

SW1, SW2 (G2, G11): Switching node of each channel

that is used for testing purposes. Also an R-C snubber

network can be applied to reduce or eliminate switch node

ringing, or otherwise leave floating. See the Applications

Information section.

PHASMD (G4): Connect this pin to SGND, INTVCC, or float-

ing this pin to select the phase of CLKOUT to 60 degrees,

120 degrees, and 90 degrees respectively.

CLKOUT (G5): Clock output with phase control using the

PHASMD pin to enable multiphase operation between

devices. See the Applications Information section.

PGOOD1, PGOOD2 (G9, G8): Output Voltage Power

Good Indicator. Open drain logic output that is pulled to

ground when the output voltage is not within ±10% of

the regulation point.

INTVCC (H8): Internal 5V Regulator Output. The control

circuits and internal gate drivers are powered from this

voltage. Decouple this pin to PGND with a 4.7µF low ESR

tantalum or ceramic. INTVCC is activated when either RUN1

or RUN2 is activated.

TEMP (J6): Onboard Temperature Diode for Monitoring

the VBE Junction Voltage Change with Temperature. See

the Applications Information section.

EXTVCC (J7): External power input that is enabled through

a switch to INTVCC whenever EXTVCC is greater than 4.7V.

Do not exceed 6V on this input, and connect this pin to

VIN when operating VIN on 5V. An efficiency increase will

occur that is a function of the (VIN – INTVCC) multiplied by

power MOSFET driver current. Typical current requirement

is 30mA. VIN must be applied before EXTVCC, and EXTVCC

must be removed before VIN.

VIN (M2-M11, L2-L11, J2-J4, J9-J11, K2-K4, K9-K11):

Power Input Pins. Apply input voltage between these pins

and GND pins. Recommend placing input decoupling

capacitance directly between VIN pins and GND pins.

Top Heat Sink: Top heat sink is at ground potential.

For more information www.linear.com/LTM4620

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