Data Sheet

LT3073

analog.com

Rev 0.

7 of 37

2

Dropout voltage, VDO, is the minimum input-to-output voltage differential at a specified output current. In

dropout, the output voltage equals VIN – VDO.

3

Operating conditions are limited by maximum junction temperature. The regulated output voltage specification

does not apply to all possible input and output current combinations. When operating at maximum output

current, limit the input voltage range to VIN ≤ VOUT + 600mV.

4

The TEMP output voltage represents the average temperature of the LT3073’s power devices. Due to power

dissipation, temperature gradients, and thermal time constants across the die, the TEMP output voltage

measurement is not guaranteed to precisely track transient power excursions in the power device. The internal

thermal shutdown sensor is designed to keep the LT3073 within its safe operating area.

5

The VIOC buffer outputs a voltage equal to VIN-VOUT+800mV. See the Applications Information section for further

information. The VIOC pin’s source current can be set between 10µA and 200µA. The minimum voltage required

from BIAS to VIOC is 1V.

6

Adding a capacitor at the REF pin decreases output voltage noise. Adding this capacitor bypasses the REF pin

internal resistor’s thermal noise and the reference current’s noise. The output noise then equals the error

amplifier noise. The use of a REF pin bypass capacitor also increases start-up time.

ABSOLUTE MAXIMUM RATINGS

Table 2. Absolute maximum ratings

PARAMETER

RATING

IN Pin Voltage 1

-0.3V to 6V

OUT Pin Voltage 1

-0.3V to 6V

SENSE Pin Voltage 1

-0.3V to 6V

BIAS, BIASF Pin Voltage 1

-0.3V to 6V

VO0, VO1, VO2, MARG Pin Voltage 1

-0.3V to 5.5V

EN Pin Voltage 1

-0.3V to 6V

VIOC Pin Voltage 1

-0.3V to 6V

VIOC Pin Current

-1mA to 1mA

IMON Pin Voltage 1

-0.3V to 6V

TEMP Pin Voltage 1

-0.3V to 6V

PG Pin Voltage 1

-0.3V to 6V

REF Pin Voltage 1

-0.3V to 6V

Output Short Circuit Duration

Indefinite

Operating Junction Temperature 2

-40°C to 125°C

Storage Temperature Range

-65°C to 150°C

Maximum Reflow (Package Body) Temperature

260°C

.