LM2733XMF datasheet(3/22 Pages) TI

3 / 22 page

formula:

If power dissipation exceeds the maximum specified above, the internal thermal protection

LM2733

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SNVS209E – NOVEMBER 2002 – REVISED APRIL 2013

Absolute Maximum Ratings

(1) (2)

Storage Temperature Range

−65°C to +150°C

Operating Junction Temperature Range

−40°C to +125°C

Lead Temp. (Soldering, 5 sec.)

300°C

Power Dissipation(3)

Internally Limited

FB Pin Voltage

−0.4V to +6V

SW Pin Voltage

−0.4V to +40V

Input Supply Voltage

−0.4V to +14.5V

SHDN Pin Voltage

−0.4V to VIN + 0.3V

θJ-A (SOT-23)

265°C/W

ESD Rating(4)

Human Body Model

2 kV

Machine Model

200V

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply

when operating the device outside of the limits set forth under the operating ratings which specify the intended range of operating

conditions.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3)

The maximum power dissipation which can be safely dissipated for any application is a function of the maximum junction temperature,

TJ(MAX) = 125°C, the junction-to-ambient thermal resistance for the SOT-23 package, θJ-A = 265°C/W, and the ambient temperature,

TA. The maximum allowable power dissipation at any ambient temperature for designs using this device can be calculated using the

circuitry will protect the device by reducing the output voltage as required to maintain a safe junction temperature.

(4)

The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200 pF

capacitor discharged directly into each pin.

Electrical Characteristics

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range

(

−40°C ≤ TJ ≤ +125°C). Unless otherwise specified: VIN = 5V, VSHDN = 5V, IL = 0A.

Symbol

Parameter

Conditions

Min(1)

Typical(2)

Max(1)

Units

VIN

Input Voltage

2.7

ISW

Switch Current Limit

See(3)

1.0

1.5

RDS(ON)

Switch ON Resistance

ISW = 100 mA

500

650

Ω

SHDNTH

Shutdown Threshold

Device ON

1.5

Device OFF

0.50

ISHDN

Shutdown Pin Bias Current

VSHDN = 0

µA

VSHDN = 5V

VFB

Feedback Pin Reference Voltage

VIN = 3V

1.205

1.230

1.255

IFB

Feedback Pin Bias Current

VFB = 1.23V

Quiescent Current

VSHDN = 5V, Switching "X"

2.1

3.0

VSHDN = 5V, Switching "Y"

1.1

VSHDN = 5V, Not Switching

400

500

µA

VSHDN = 0

0.024

Δ VFBΔVIN

FB Voltage Line Regulation

2.7V

≤ VIN ≤ 14V

0.02

%/V

FSW

Switching Frequency

“X” Option

1.15

1.6

1.85

MHz

“Y” Option

0.40

0.60

0.8

DMAX

Maximum Duty Cycle

“X” Option

“Y” Option

Switch Leakage

Not Switching VSW = 5V

µA

(1)

Limits are specified by testing, statistical correlation, or design.

(2)

Typical values are derived from the mean value of a large quantity of samples tested during characterization and represent the most

likely expected value of the parameter at room temperature.

(3)

Switch current limit is dependent on duty cycle (see Typical Performance Characteristics). Limits shown are for duty cycles

≤ 50%.

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