Data Sheet

LT8615

analog.com

Rev 0

4 of 31

SPECIFICATIONS

Table 1. Electrical Characteristics

(TJ = -40°C to +150°C, unless otherwise noted. Typical values are at TA. = 25°C. All voltages are referenced to GND,

unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

VIN

2.5

3.0

V

VIN Quiescent Current in

Shutdown

IQ(SHDN)

VEN/UV = 0V, VSYNC = 0V, TA = +25°C

1

4

μA

VIN Quiescent Current in

Sleep

IQ

VEN/UV = 2V, Not Switching, VSYNC = 0V,

TA = +25°C

1.7

5.0

μA

VEN/UV = 2V, Not Switching, VSYNC = 0V

1.7

12.0

VIN Current in Regulation

IIN

VIN = 6V, VOUT = 2.7V, Output Load =

1mA, Burst Mode

540

700

μA

Feedback Reference

Voltage

VFB

VIN = 6V, ILOAD = 200mA, TA = +25°C

0.783 0.787 0.791

V

VIN = 6V, ILOAD = 200mA

0.771 0.787 0.801

Feedback Voltage Line

Regulation

ΔVFB(LINE)

VIN = 4V to 40V

0.005 0.020

%/V

Feedback Pin Input

Current

IFB

VFB = 1V

20

20

nA

Minimum On-Time

tON(MIN)

ILOAD = 1.6A, SYNC = 0V

40

75

ns

ILOAD = 1.6A, SYNC = 1.9V

40

60

Minimum Off-Time

tOFF(MIN)

75

100

ns

Oscillator Frequency

fsw

RT = 221kΩ, ILOAD = 0.5A

170

200

230

kHz

RT = 60.4kΩ, ILOAD = 0.5A

640

700

760

RT = 18.2kΩ, ILOAD = 0.5A

1925

2000

2075

Top Power NMOS On-

Resistance

RTOP

ISW= 1A

80

mΩ

Top Power NMOS

Current Limit

IPEAK-LIMIT

6.0

7.3

8.5

A

Bottom Power NMOS

On-Resistance

RBOT

80

mΩ

SW Leakage Current

ISW-LKG

VIN = 42V, VSW = 0V, 42V

-15

15

μA