Datasheet

1
2
3NFB
SW
GND
5 V
IN
4 SHDN
LM2611
SNOS965I –JUNE 2001–REVISED APRIL 2013 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
5-lead SOT-23 Package
Top View
See Package Number DBV0005A
Pin Description
Pin Name Function
1 SW Drain of internal switch. Connect at the node of the input inductor and Cuk capacitor.
2 GND Analog and power ground.
3 NFB Negative feedback. Connect to output via external resistor divider to set output voltage.
4 SHDN Shutdown control input. V
IN
= Device on. Ground = Device in shutdown.
5 V
IN
Analog and power input. Filter out high frequency noise with a 0.1 µF ceramic capacitor placed close
to the pin.
Absolute Maximum Ratings
(1)
V
IN
14.5V
SW Voltage −0. 4V to 36V
NFB Voltage +0. 4V to −6V
SHDN Voltage −0. 4V to 14.5V
Maximum Junction Temperature 125°C
Power Dissipation
(2)
Internally Limited
Lead Temperature 300°C
ESD Susceptibility
(3)
Human Body Model 2kV
Machine Model 200V
(1) Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the
device is intended to be functional, but device parameter specifications may not be ensured. For specifications and test conditions, see
the Electrical Characteristics.
(2) The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal
resistance, θ
JA
, and the ambient temperature, T
A
. See the Electrical Characteristics table for the thermal resistance of various layouts.
The maximum allowable power dissipation at any ambient temperature is calculated using: P
D
(MAX) = (T
J(MAX)
− T
A
)/θ
JA
. Exceeding
the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
(3) The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF
capacitor discharged directly into each pin.
Operating Conditions
Operating Junction Temperature Range −40°C to +125°C
Storage Temperature −65°C to +150°C
Supply Voltage 2.7V to 14V
θ
JA
256°C/W
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