LTM4601 데이터 시트보기 (PDF) - Linear Technology

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LTM4601

6A, 28VIN DC/DC µModule with PLL, Output Tracking and Margining

Linear Technology 

LTM4603HV

PI FU CTIO S (See Package Description for Pin Assignment)

MARG0 (Pin C12): This pin is the LSB logic input for the

margining function. Together with the MARG1 pin will

determine if margin high, margin low or no margin state

is applied. The pin has an internal pull-down resistor of

50k. See Applications Information.

MARG1 (Pin D12): This pin is the MSB logic input for the

margining function. Together with the MARG0 pin will

determine if margin high, margin low or no margin state

is applied. The pin has an internal pull-down resistor of

50k. See Applications Information.

SGND (Pin H12): Signal Ground. This pin connects to

PGND at output capacitor point.

COMP (Pin A11): Current Control Threshold and Error

Amplifier Compensation Point. The current comparator

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 (Pin A10): Run Control Pin. A voltage above 1.9V

will turn on the module, and when below 1.9V, will turn

off the module. A programmable UVLO function can be

accomplished with a resistor from VIN to this pin that has

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

VOUT_LCL (Pin L12): VOUT connects directly to this pin to

bypass the remote sense amplifier, or DIFFVOUT connects

to this pin when remote sense amplifier is used.

SI PLIFIED BLOCK DIAGRA

VOUT_LCL

>2V = ON

<0.9V = OFF

MAX = 5V RUN

PGOOD

COMP

RFB

19.1k

SGND

MARG1

MARG0

VFB

fSET

MPGM

TRACK/SS

CSS

PLLIN

INTVCC

DRVCC

1M

VOUT

INTERNAL

COMP

60.4k

5.1V

ZENER

POWER CONTROL

33.2k

50k 50k

50k

4.7μF

1.5μF

VIN

+

4.5V TO 28V

CIN

Q1

22μF

Q2

VOUT

2.5V

6A

+

COUT

PGND

INTVCC

10k

10k

10k

10k

VOSNS–

VOSNS+

DIFFVOUT

Figure 1. Simplified LTM4603HV Block Diagram

4603HV F01

8

4603hvf

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