LMZ12003 Datasheet, PDF (2/16 Pages) National Semiconductor (TI) – 3A SIMPLE SWITCHER® Power Module with 20V Maximum

Simplified Application Schematic
Connection Diagram
30109001
Top View
7-Lead TO-PMOD
30109009
Ordering Information
Order Number
LMZ12003TZ-ADJ
LMZ12003TZX-ADJ
LMZ12003TZE-ADJ
Package Type
TO-PMOD-7
TO-PMOD-7
TO-PMOD-7
NSC Package Drawing
TZA07A
TZA07A
TZA07A
Supplied As
250 Units on Tape and Reel
500 Units on Tape and Reel
45 Units in a Rail
Pin Descriptions
Pin Name Description
1 VIN Supply input — Nominal operating range is 4.5V to 20V . A small amount of internal capacitance is contained within
the package assembly. Additional external input capacitance is required between this pin and exposed pad.
2 RON On Time Resistor — An external resistor from V_IN to this pin sets the on-time of the application. Typical values range
from 25k to 124k ohms.
3
EN Enable — Input to the precision enable comparator. Rising threshold is 1.18V nominal; 90 mV hysteresis nominal.
Maximum recommended input level is 6.5V.
4 GND Ground — Reference point for all stated voltages. Must be externally connected to EP.
5
SS 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, over-current, thermal shutdown and internal UVLO conditions.
6
FB Feedback — Internally connected to the regulation, over-voltage, and short-circuit comparators. The regulation
reference point is 0.8V at this input pin. Connected the feedback resistor divider between the output and ground to set
the output voltage.
www.national.com
2