Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

PVIN, AVIN, EN, SNS

−0.3V to 6.5V

ESD Susceptibility (Note 2)

2kV

Power Dissipation

Internally Limited

Storage Temperature Range

−65˚C to +150˚C

Maximum Junction Temp.

150˚C

14-Pin Exposed Pad TSSOP

Package

Infrared (15 sec)

Vapor Phase (60 sec)

Soldering (10 sec)

220˚C

215˚C

260˚C

Operating Ratings

PVIN to GND

1.5V to 5.5V

AVIN to GND

2.85V to 5.5V

Junction Temperature

−40˚C to +125˚C

θ

JA

38˚C/W

Limits in standard type are for T

to +125˚C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values repre-

sent the most likely parametric norm at T

Symbol

Parameter

Conditions

Min

Typ

Max

Units

SYSTEM PARAMETERS

V

OUT

Voltage Tolerance

3

V

0.782

0.818

V

V

0.9775

1.0225

V

1.1730

1.2270

V

1.4663

1.5337

V

1.7595

1.8405

V

2.4437

2.5563

V

2.9325

3.0675

V

3.2257

3.3743

∆V

∆AVIN

Line Regulation

3

V

2.5V

2.85V

≤ AVIN ≤ 5.5V

0.2

0.6

%

V

3.5V

≤ AVIN ≤ 5.5V

0.2

0.6

%

∆V

∆I

O

Load Regulation

Normal operation

8

mV/A

V

ON

UVLO Threshold

(AVIN)

Rising

2.47

2.85

V

Falling Hysteresis

85

150

210

mV

r

DSON-P

PFET On

Resistance

Isw=2A

75

140

m

Ω

r

DSON-N

NFET On

Resistance

Isw=2A

55

120

m

Ω

R

SS

Soft-start

resistance

400

k

Ω

I

CL

Peak Current Limit

Threshold

LM2852X

2.75

4

4.95

A

LM2852Y

2.25

3

3.65

I

Q

Operating Current Non-switching

0.85

2

mA

I

SD

Shutdown

Quiescent Current

EN=0V

10

25

µA

R

SNS

Sense pin

resistance

400

k

Ω

PWM

f

osc

LM2852X

1500kHz option.

1050

1500

1825

kHz

LM2852Y

500kHz option.

325

500

625

kHz

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