LTM4612 Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LTM4612

Ultralow Noise 36VIN, 15VOUT, 5A, DC/DC µModule

Linear Technology 

LTM4612

PIN FUNCTIONS

COMP (Pins A11, D11): Current Control Threshold and

Error Amplifier Compensation Point. The current com-

parator threshold increases with this control voltage. The

voltage ranges from 0V to 2.4V with 0.7V corresponding

to zero sense voltage (zero current).

PGOOD (Pin G12): 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,

after a 25μs power bad mask timer expires.

RUN (Pins A10, B9): Run Control Pins. A voltage above

1.9V will turn on the module, and below 1V will turn off

the module. A programmable UVLO function can be ac-

complished with a resistor from VIN to this pin that is has

a 5.1V zener to ground. Maximum pin voltage is 5V.

NC (Pins J12, K12, L12): No Connect Pins.

BLOCK DIAGRAM

> 1.9V = ON

< 1V = OFF

MAX = 5V RUN

PGOOD

COMP

RFB

5.23k

SGND

MARG1

MARG0

VFB

fSET

FCB

MPGM

TRACK/SS

CSS

PLLIN

INTVCC

DRVCC

INTERNAL

COMP

VOUT

100k

5.1V

ZENER

POWER CONTROL

93.1k

10k

50k 50k

4.7μF

50k

INPUT

FILTER

1μF

+

VIN

20V TO 36V

CIN

VD

CD

M1

VOUT

12V

AT 4A

NOISE

CANCEL-

10μF

+

LATION

M2

COUT

PGND

Figure 1. Simplified Block Diagram

DECOUPLING REQUIREMENTS Specifications are at TA = 25°C. Use Figure 1 configuration.

SYMBOL

CIN

COUT

PARAMETER

External Input Capacitor Requirement

(VIN = 20V to 36V, VOUT = 12V)

External Output Capacitor Requirement

(VIN = 20V to 36V, VOUT = 12V)

CONDITIONS

IOUT = 4A

IOUT = 4A

MIN TYP MAX

10

100 150

8

UNITS

μF

μF

4612f

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