5

LM2840-Q1, LM2841-Q1, LM2842-Q1

www.ti.com

SNVSBE5 – APRIL 2019

Product Folder Links: LM2840-Q1 LM2841-Q1 LM2842-Q1

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Copyright © 2019, Texas Instruments Incorporated

(1)

All limits specified at room temperature (TA = 25°C) unless otherwise noted. Room temperature limits are production tested. Limits at

temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. Limits are used to

calculate Average Outgoing Quality Level (AOQL).

(2)

Typical numbers are at 25°C and represent the most likely norm.

(3)

The part numbers in this table represent both the Q1 and non-Q1 versions of the respective parts.

(4)

Includes the bond wires, RDSON from VIN pin to SW pin.

(5)

Current limit at 0% duty cycle. May be lower at higher duty cycle or input voltages below 6 V.

(6)

Bias currents flow into pin.

(7)

Minimum ON-time specified by design and simulation.

6.5 Electrical Characteristics

Specifications are for TJ = 25°C unless otherwise specified. Minimum and Maximum limits are specified through test, design,

or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference

purposes only. Unless otherwise stated the following conditions apply: VIN = 12 V.

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IQ

Quiescent current

SHDN = 0 V

16

µA

TJ = −40°C to 125°C

40

Device ON, not switching

1.3

mA

TJ = −40°C to 125°C

1.75

Device ON, no load

1.35

TJ = −40°C to 125°C

1.85

RDSON

Switch ON resistance

See (4)

0.9

Ω

TJ = −40°C to 125°C

1.6

ILSW

Switch leakage current

VIN = 42 V

0

µA

TJ = −40°C to 125°C

0.5

ICL

Switch current limit

LM2840(5)

525

mA

TJ = −40°C to 125°C

900

LM2841(5)

525

mA

TJ = −40°C to 125°C

900

LM2842(5)

1.15

A

TJ = −40°C to 125°C

1.7

IFB

Feedback pin bias current

LM284[0,1,2](6)

0.1

µA

TJ = −40°C to 125°C

1

VFB

FB Pin reference voltage

0.765

V

TJ = −40°C to 125°C

0.747

0.782

tON(min)

Minimum ON-time

See (7)

100

ns

TJ = −40°C to 125°C

150

tOFF(min)

Minimum OFF-time

X option

110

ns

TJ = −40°C to 125°C

370

Y option

104

ns

TJ = −40°C to 125°C

200

fSW

Switching frequency

X option, VFB = 0.5 V

550

kHz

TJ = −40°C to 125°C

325

750

X option, VFB = 0 V

140

Y option, VFB = 0.5 V

1.25

MHz

TJ = −40°C to 125°C

0.95

1.5

Y option, VFB = 0 V

0.35

DMAX

Maximum duty cycle

X option

94%

TJ = −40°C to 125°C

88%

Y option

87%

TJ = −40°C to 125°C

81%