LM3502

SNVS339B – SEPTEMBER 2005 – REVISED MAY 2013

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Absolute Maximum Ratings

(1) (2) (3)

−0.3V to +5.5V

Sw Pin

−0.3V to +48V

Fb Pin

−0.3V to +5.5V

Cntrl Pin

−0.3V to +5.5V

−0.3V to +48V

En1

−0.3V to +5.5V

En2

−0.3V to +5.5V

Continuous Power Dissipation

Internally Limited

Maximum Junction Temperature

+150°C

Storage Temperature Range

−65°C to +150°C

Human Body Model:

2 kV

Machine Model:

200V

(1)

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

(2)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical characteristic specifications do not

apply when operating the device outside of its rated operating conditions.

(3)

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

specifications.

(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.

Operating Conditions

(1) (2)

−40°C to +125°C

−40°C to +85°C

2.5V to 5.5V

Cntrl, En1, and En2 Pins

0V to 5.5V

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical characteristic specifications do not

apply when operating the device outside of its rated operating conditions.

(2)

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

Thermal Properties

(1)

Junction-to-Ambient Thermal Resistance (

DSBGA Package

65°C/W

WQFN Package

49°C/W

(1)

resistance,

dissipation will cause excessive die temperature. For more information on this topic, please refer toApplication Note 1187: Leadless

Leadframe Package (LLP) and Application Note 1112 for DSBGA chip scale package.

Preliminary Electrical Characteristics

(1) (2)

(

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Input Voltage

2.5

5.5

V

Non-Switching

Fb > 0.25V

0.5

1

mA

Switching

Fb = 0V, Sw Is Floating

1.9

3

mA

Shutdown

Cntrl = 0V

0.1

3

µA

Cntrl = 1.5V, En1 = En2 = 0V

6

15

µA

Feedback Voltage

0.18

0.25

0.3

V

(1)

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

(2)

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

norm.

4

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