LT3050MPMSE Ver la hoja de datos (PDF) - Linear Technology

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LT3050MPMSE

100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs

Linear Technology 

LT3050 Series

PIN FUNCTIONS

For detailed information on how to set the IMAX pin resistor

value, please see the Operation section.

The IMAX pin requires a 10nF decoupling capacitor to

ground. If not used, tie IMAX to GND.

IMON (Pin 12): Output Current Monitor. This pin is the

collector of a PNP current mirror that outputs 1/100th

of the power PNP current. When OUT = IMON, the pin

current exactly equals 1/100th that of the output current.

For detailed information on how to calculate the output

current from the IMON pin, please see the Operation section.

The IMON pin requires a small (22nF minimum) external

decoupling capacitor. If the IMON pin is not used, it must

be tied to GND.

BLOCK DIAGRAM

IN

5, 6

OUT

ADJ

9

R2

30k

R4

R1

IDEAL

DIODE

D3

Q2

D2

THERMAL/

–

CURRENT LIMITS

+

ERROR

AMPLIFIER

SHDN

4

+–

600mV

REFERENCE

R1

D1

QIMIN

1/200

QIMON

1/100

QIMAX

1/200

QPOWER

1

Q3 CURRENT

LIMIT

AMPLIFIER 100k

R3

IMIN

COMPARATOR

100k

R2

OUT

7, 8

IMAX 11

IMON 12

IMIN 2

FAULT

3

U1

QFAULT

FIXED VOUT

R1

R2

3.3V

60k

270k

5V

60k

440k

REF/BYP

1

GND

10, 13

3050 BD01

3050fa

14

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