LMZ14203_15 Datasheet, PDF (3/29 Pages) Texas Instruments – SIMPLE SWITCHER 6V to 42V, 3A Power Module in Leaded SMT-TO Package

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5 Pin Configuration and Functions
NDW Package
7-Pin TO-PMOD
Top View
LMZ14203
SNVS632R – DECEMBER 2009 – REVISED OCTOBER 2015
Exposed Pad
Connect to GND
7
VOUT
6
FB
5
SS
4
GND
3
EN
2
RON
1
VIN
PIN
NAME
NO.
EN
3
FB
6
GND
4
RON
2
SS
5
VIN
1
VOUT
7
Thermal Pad
Pin Functions
TYPE
DESCRIPTION
Analog
Analog
Ground
Analog
Analog
Power
Power
Ground
Enable. Input to the precision enable comparator. Rising threshold is 1.18 V nominal; 90 mV
hysteresis nominal. Maximum recommended input level is 6.5 V.
Feedback. Internally connected to the regulation, overvoltage, and short-circuit comparators. The
regulation reference point is 0.8 V at this input pin. Connected the feedback resistor divider between
the output and ground to set the output voltage.
Ground. Reference point for all stated voltages. Must be externally connected to exposed thermal
pad.
ON-time resistor. An external resistor between this pin and the VIN pin sets the ON-time of the
application. Typical values range from 25 kΩ to 124 kΩ.
Soft-start. An internal 8-µA current source charges an external capacitor to produce the soft-start
function. This node is discharged at 200 µA during disable, overcurrent, thermal shutdown and
internal UVLO conditions.
Supply input. Nominal operating range is 6 V to 42 V . A small amount of internal capacitance is
contained within the package assembly. Additional external input capacitance is required between
this pin and exposed pad.
Output voltage. Output from the internal inductor. Connect the output capacitor between this pin and
exposed pad.
Exposed thermal pad. Internally connected to pin 4. Used to dissipate heat from the package during
operation. Must be electrically connected to pin 4 external to the package.
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)⁽¹⁾⁽²⁾
VIN, RON to GND
EN, FB, SS to GND
Junction Temperature
Peak Reflow Case Temperature (30 sec)
Storage Temperature
MIN
MAX
UNIT
–0.3
43.5
V
–0.3
7
V
150
°C
245
°C
–65
150
°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) For soldering specifications, refer to the following document: www.ti.com/lit/snoa549c
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