LMZ14201_13 Datasheet, PDF (3/26 Pages) Texas Instruments – LMZ14201 1A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage

LMZ14201
www.ti.com
Simplified Application Schematic
LMZ14201
V_IN
R_ON
See Table
Enable
C_IN
10 PF
C_SS
0.022 PF
SNVS649E – JANUARY 2010 – REVISED MARCH 2013
V_OUT
5V
3.3V
2.5V
1.8V
1.5V
1.2V
0.8V
R_FBT
5.62k
3.32k
2.26k
1.87k
1.00k
4.22k
0
R_FBB
1.07k
1.07k
1.07k
1.50k
1.13k
8.45k
39.2k
R_ON
100k
61.9k
47.5k
32.4k
28.0k
22.6k
24.9k
V_IN Range
7.5...42V
6...42V
6...30V
6...25V
6...21V
6...19V
6...18V
V_OUT @ 1A
C_{FF 0.022 PF}
R_FBT
See Table
R_FBB
See Table
100 PF
Connection Diagram
Exposed Pad
Connect to GND
7
VOUT
6
FB
5
SS
4
GND
3
EN
2
RON
1
VIN
Figure 2. Top View
7-Lead PFM
Pin Descriptions
Pin Name Description
1
VIN Supply input — Nominal operating range is 6V to 42V . 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.
7 VOUT Output Voltage — Output from the internal inductor. Connect the output capacitor between this pin and exposed pad.
EP EP Exposed 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.
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.
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