LT6654BX datasheet(6/14 Pages) AD

6 / 14 page

LT6654BX

Rev. 0

For more information www.analog.com

PIN FUNCTIONS

DNC (Pins 1,7): Do Not Connect. Keep leakage current

from this pin to VIN or GND to a minimum. To minimize

leakage due to board contamination, encircle the pin with

a metal ring connected to VOUT.

NC (Pin 2, 5): Not internally connected. May be tied to

VIN, VOUT, GND or floated.

GND (Pin 3): Internal Function. This pin must be tied to

GND near Pin 4.

GND (Pin 4): Primary Device Ground. Pin 3 and the load

ground should be star-connected to Pin 4.

VOUT (Pin 6): VOUT Pin. An output capacitor of 1μF or

greater is required for stable operation.

VIN (Pin 8): Power Supply. Bypass VIN with a 0.1μF or

larger capacitor to GND.

BLOCK DIAGRAM

–

VOUT

6654BX BD

BANDGAP

VIN

DNC

GND

TYPICAL PERFORMANCE CHARACTERISTICS The test conditions are T

A = 25°C, CIN = 0.1μF,

COUT= 1μF, IOUT=0A and VIN = VOUT + 0.5V, unless otherwise noted.

2.5V Output Voltage Noise

Spectrum

2.5V Power Supply Rejection

Ratio vs Frequency

2.5V Output Impedance vs

Frequency

FREQUENCY (kHz)

0.01

0.1

100

150

250

300

350

200

400

6654 G18

100

IO = 5mA

IO = 0µA

FREQUENCY (kHz)

0.1

100

–100

–90

–80

–70

–50

–40

–30

–60

–20

6654 G20

1000

CL = 1µF

CL = 10µF

FREQUENCY (kHz)

100

0.1

100

6654BX G18

1000

CL = 10µF

CL = 1µF

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