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

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

265°C/W

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,

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

(

Symbol

Parameter

Conditions

Units

Input Voltage

2.7

14

V

Switch Current Limit

1.0

1.5

A

Switch ON Resistance

500

650

m

Ω

Shutdown Threshold

Device ON

1.5

V

Device OFF

0.50

Shutdown Pin Bias Current

0

µA

0

2

Feedback Pin Reference Voltage

1.205

1.230

1.255

V

Feedback Pin Bias Current

60

nA

Quiescent Current

2.1

3.0

mA

1.1

2

400

500

µA

0.024

1

FB Voltage Line Regulation

2.7V

0.02

%/V

Switching Frequency

“X” Option

1.15

1.6

1.85

MHz

“Y” Option

0.40

0.60

0.8

Maximum Duty Cycle

“X” Option

87

93

%

“Y” Option

93

96

Switch Leakage

1

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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