LM2751SDX-A datasheet(4/19 Pages) TI

Part #	LM2751SDX-A

Description	LM2751 Regulated 2X, 1.5X Switched Capacitor White LED Driver

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Manufacturer	TI [Texas Instruments]

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LM2751

SNVS299B – APRIL 2005 – REVISED MAY 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

(1) (2)

Limits in standard typeface are for TA = 25ºC. Limits in boldface type apply over the full operating ambient temperature range

(-40°C

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

= 3.6V, V(EN) = VIN, CS0 = CS1 = VIN, C1 = C2 = 1.0µF, CIN = COUT = 2.2µF

(3).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VOUT

Output Voltage

Version A, 2.8V

≤ VIN ≤ 5.5V,

4.850

5.0

5.150

V

Freq. = 300kHz, 725kHz, TA = 25°C

(-3%)

(+3%)

IOUT = 0 to 60mA

Version A, 2.8V

≤ VIN ≤ 5.5V,

4.775

5.225

Freq. = 300kHz, IOUT = 0 to 60mA

(-4.5%)

(+4.5%)

Freq. = 725kHz, IOUT = 0 to 80mA

Version B, 2.8V

≤ VIN ≤ 5.5V,

4.343

4.5

4.658

Freq. = 300kHz, 725kHz, TA = 25°C

(-3.5%)

(+3.5%)

IOUT = 0 to 120mA

Version B, 2.8V

≤ VIN ≤ 5.5V,

4.275

4.725

Freq. = 300kHz, IOUT = 0 to 120mA

(-5%)

(+5%)

Freq. = 725kHz, IOUT = 0 to 150mA

VR

Output Ripple

2.8V

≤ VIN ≤ 5.5V

8

mV

IOUT = 60mA

IQ

Quiescent Current

Freq. = 9.5kHz, IOUT = 0mA, VIN = 3.7V

425

600

µA

Freq. = 37kHz, IOUT = 0mA, VIN = 3.7V

450

640

Freq. = 300kHz, IOUT = 0mA, VIN = 3.7V

700

900

Freq. = 725kHz, IOUT = 0mA, VIN = 3.7V

1000

1500

ISD

Shutdown Supply Current

V(EN) = 0V

0.77

1.3

µA

V(EN) = 0V, TA = 85°C

1.0

E

Efficiency

IOUT = 80mA (Version A, 5.0V)

92

%

Freq. = 300kHz, 725kHz

IOUT = 150mA (Version B, 4.5V)

83

Freq. = 300kHz, 725kHz

f

SW

Switching Frequency

CS0 = High, CS1 = Low

6.7

9.5

12.3

kHz

2.8V

≤ VIN ≤ 5.5V

(

−30%)

(+30%)

CS0 = Low, CS1 = Low

26

37

48

2.8V

≤ VIN ≤ 5.5V

(

−30%)

(+30%)

CS0 = Low, CS1 = High

210

300

390

2.8V

≤ VIN ≤ 5.5V

(

−30%)

(+30%)

CS0 = High, CS1 = High

508

725

942

2.8V

≤ VIN ≤ 5.5V

(

−30%)

(+30%)

VIH

Logic Input High

Input Pins: EN, CS0, CS1

1.00

VIN

V

2.8V

≤ VIN ≤ 5.5V

VIL

Logic Input Low

Input Pins: EN, CS0, CS1

0

.30

V

2.8V

≤ VIN ≤ 5.5V

IIH

Logic Input High Current

Input Pins: CS0, CS1

10

nA

V(CSx) = 1.8V

Input Pin: EN

2

µA

V(EN) = 1.8V(4)

IIL

Logic Input Low Current

Input Pins: EN, CS0, CS1

10

nA

V(EN, CSx) = 0V

VG

Gain Transition Voltage

1.5X to 2X

3.50

V

(Version A, B)

2X to 1.5X

3.58

Hysteresis

40

80

150

mV

ISC

Short Circuit Output

VOUT = 0V

250

mA

Current

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but represent the most likely

norm.

(3)

CIN, COUT, C1, and C2: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.

(4)

EN Logic Input High Current (IIH) is due to a 1MΩ(typ.) pull-down resistor connected internally between the EN pin and GND.

4

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