LM2751SD-B datasheet(3/11 Pages) NSC

Part #	LM2751SD-B

Description	Regulated 2X, 1.5X Switched Capacitor White LED Driver

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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Absolute Maximum Ratings (Notes 1, 2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

V

IN Pin

−0.3V to 6.0V

EN, CS0, CS1 Pins

−0.3V to (V

IN+0.3)

w/ 6.0V max

Continuous Power Dissipation

(Note 3)

Internally Limited

Junction Temperature

(T

J-MAX-ABS)

150˚C

Storage Temperature Range

−65˚C to 150˚C

Maximum Lead Temperature

265˚C

(Soldering, 10sec.)

ESD Rating (Note 4)

Human-body model:

Machine model:

2kV

200V

Operating Ratings

(Notes 1, 2)

Input Voltage Range

2.8V to 5.5V

EN, CS0, CS1 Input Voltage Range

0V to V

IN

Junction Temperature (T

J) Range

-40˚C to 115˚C

Ambient Temperature (T

A) Range

-40˚C to 85˚C

(Note 5)

Recommended Maximum Load Current

Version

Freq. = 725kHz

150mA

B

Freq. = 300kHz

120mA

Freq. = 37kHz

40mA

Freq. = 9.5kHz

10mA

Version

Freq. = 725kHz

80mA

A

Freq. = 300kHz

60mA

Freq. = 37kHz

16mA

Freq. = 9.5kHz

4mA

Thermal Properties

Junction-to-Ambient Thermal

Resistance, LLP-10

55˚C/W

Package (

θ

JA) (Note 6)

Electrical Characteristics

(Notes 2, 7)

Limits in standard typeface are for T

A =25

oC. Limits in boldface type apply over the full operating ambient temperature range

(-40˚C

≤ T

A

≤ +85˚C) . Unless otherwise noted, specifications apply to the LM2751 Typical Application Circuit (pg. 1) with: V

IN

= 3.6V, V(EN) = V

IN, CS0=CS1=VIN,C1 =C2 = 1.0µF, CIN =COUT = 2.2µF (Note 8).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

V

OUT

Output Voltage

Version A, 2.8V

≤ V

IN

≤ 5.5V,

Freq. = 300kHz, 725kHz, T

A = 25˚C

I

OUT = 0 to 60mA

4.850

(-3%)

5.0

5.150

(+3%)

V

Version A, 2.8V

≤ V

IN

≤ 5.5V,

Freq. = 300kHz, I

OUT = 0 to 60mA

Freq. = 725kHz, I

OUT = 0 to 80mA

4.775

(-4.5%)

5.225

(+4.5%)

Version B, 2.8V

≤ V

IN

≤ 5.5V,

Freq. = 300kHz, 725kHz, T

A = 25˚C

I

OUT = 0 to 120mA

4.343

(-3.5%)

4.5

4.658

(+3.5%)

Version B, 2.8V

≤ V

IN

≤ 5.5V,

Freq. = 300kHz, I

OUT = 0 to 120mA

Freq. = 725kHz, I

OUT = 0 to 150mA

4.275

(-5%)

4.725

(+5%)

V

R

Output Ripple

2.8V

≤ V

IN

≤ 5.5V

I

OUT = 60mA

8mV

I

Q

Quiescent Current

Freq. = 9.5kHz, I

OUT = 0mA, VIN = 3.7V

425

600

µA

Freq. = 37kHz, I

OUT = 0mA, VIN = 3.7V

450

640

Freq. = 300kHz, I

OUT = 0mA, VIN = 3.7V

700

900

Freq. = 725kHz, I

OUT = 0mA, VIN = 3.7V

1000

1500

I

SD

Shutdown Supply Current

V(EN) = 0V

0.77

1.3

µA

V(EN) = 0V, T

A = 85˚C

1.0

E

Efficiency

I

OUT = 80mA (Version A, 5.0V)

Freq. = 300kHz, 725kHz

92

%

I

OUT = 150mA (Version B, 4.5V)

Freq. = 300kHz, 725kHz

83

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