Data Sheet

LT3077

analog.com

Rev. 0

8 of 38

(All typical specifications are at TJ (Junction Temperature) = 25°C and all min and max specifications are across

the entire operating temperature range unless otherwise noted. COUT = 22μF, CREF= 4.7μF, CBIASF = 2.2μF, RILIM =

0.8kΩ, unless otherwise noted. )

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Output Noise Spectral

Density4

Vn(OUT)

VOUT = 1V, IOUT =

3A, VIN = 1.3V,

VBIAS = 3.3V, COUT =

22μF

Frequency =

0.1Hz, CREF =

4.7μF

2.5

µV/√Hz

Frequency =

10Hz, CREF =

4.7μF

40

nV/√Hz

Frequency =

10Hz, CREF =

0.47μF

650

Frequency =

10kHz, CREF =

4.7μF

3.5

Frequency =

10kHz, CREF =

0.47μF

3.5

Frequency =

100kHz, CREF =

4.7μF

3.8

Frequency =

100kHz, CREF =

0.47μF

3.8

.

1

To maintain proper performance and regulation, the BIAS supply voltage must satisfy the following conditions:

2.375V ≤ VBIAS ≤ 5.5V and VBIAS ≥ (VOUT + 1.2V).

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

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.

A N A L O G D E V I C E S

C O N F I D E N T I A L