LTG2 datasheet(5/16 Pages) LINER

5 / 16 page

LT3464

3464f

CTRL (Pin 1): Internal Reference Override Pin. This allows

the FB voltage to be externally set between 0V and 1.25V.

Tie this pin to above 1.5V (VIN for example) to use the

internal 1.25V reference.

OUT

CTRL









when VCTRL is less than 1.25V (see Figure 4)

FB (Pin 2): Feedback Pin. The LT3464 regulates its feed-

back pin to 1.25V if the internal reference is used or to

VCTRL if the CTRL pin is between 0V and 1.25V. Connect

the feedback resistor divider tap to this pin. Set the output

voltage by selecting R1 and R2 (see Figure 4).

OUT

REF









–

OUT (Pin 3): PNP Collector. This is the output of the

Output Disconnect circuit. Bypass this pin with at least a

0.1

µF capacitor connected to the CAP pin or to ground.

GND (Pin 4): Ground. Tie this pin directly to the ground

plane.

CAP (Pin 5): PNP Emitter and Schottky Cathode. This pin

connects to the output capacitor, and optionally to the

external phase-lead capacitor.

SW (Pin 6): Switch Pin and Schottky Anode. This is the

collector of the internal NPN power switch. Minimize the

metal trace area connected to the pin to minimize EMI.

VIN (Pin 7): Input Supply Pin: Bypass this pin with a

capacitor located as close to the device as possible.

SHDN (Pin 8): Shutdown Pin. This pin is used to put the

device in shutdown mode. Tie the pin low to shut down the

LT3464. Tie high for normal operation See the electrical

specifications for the required voltages.

PI FU CTIO S

FB Pin Voltage vs

CTRL Pin Voltage

FB and CTRL Pin

Bias Currents

TYPICAL PERFOR A CE CHARACTERISTICS

3464 G19

TEMPERATURE (

°C)

–50

–25

100

TEMPERATURE (

°C)

–50

–25

100

3464 G18

CTRL PIN

FEEDBACK PIN

1.50

1.25

1.00

0.75

0.50

0.25

3464 G17

CONTROL PIN VOLTAGE (V)

0.25

0.5

0.75

1.0

1.25

1.5

1.75

FB Pin Hysteresis

LTG2 Datasheet(PDF) 5 Page - Linear Technology

LTG2 Datasheet(HTML) 5 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Datasheet Download

Link URL