VinMin = 12.0V
VinMax = 22.0V
Vout = 3.3V
Iout = 2.0A
WEBENCH
®
Device = LMZ14203TZ-ADJ/NOPB
Topology = Buck
Created = 6/1/15 7:21:37 PM
BOM Cost = $10.62
2
Footprint = 296.0 mm
BOM Count = 12
Total Pd = 0.74W
Design Report
Design : 4387352/1 LMZ14203TZ-ADJ/NOPB
LMZ14203TZ-ADJ/NOPB 12.0V-22.0V to 3.30V @ 2.0A
VinMin = 12.0V
VinMax = 22.0V
Vout = 3.3V
Iout = 2.0A
Ron
LMZ1 4 2 0 3
60.4 kOhm VIN
125.0 m W
U1
Ron
VOUT
FB
EN
SS
GND
Vin
Rfbt
Cf
3.32 kOhm
125.0 m W
22.0 nF
Rent
68.1 kOhm
125.0 m W
Cout
Cin
Css
Rfbb
4.7 µF
3.0 m Ohm
Qty= 3
10.0 nF
1.07 kOhm
125.0 m W
Renb
100.0 µF
18.0 m Ohm
Iout
7.5 kOhm
125.0 m W
Electrical BOM
# Name
Manufacturer
Part Number
Properties
Qty Price
1. Cf
Yageo America
CC0805KRX7R9BB223
Series= X7R
Cap= 22.0 nF
VDC= 50.0 V
IRMS= 0.0 A
1
GRM31CR71H475KA12L
Series= X7R
Cap= 4.7 uF
ESR= 3.0 mOhm
VDC= 50.0 V
IRMS= 4.98 A
3
T520B107M006ATE018
Series= 249
Cap= 100.0 uF
ESR= 18.0 mOhm
VDC= 6.3 V
IRMS= 2.7 A
1
GRM216R71H103KA01D
Series= X7R
Cap= 10.0 nF
VDC= 50.0 V
IRMS= 0.0 A
1
ERJ-6ENF7501V
Series= 225
Res= 7.5 kOhm
Power= 125.0 mW
Tolerance= 1.0%
1
ERJ-6ENF6812V
Series= 225
Res= 68.1 kOhm
Power= 125.0 mW
Tolerance= 1.0%
1
ERJ-6ENF1071V
Series= 225
Res= 1.07 kOhm
Power= 125.0 mW
Tolerance= 1.0%
1
ERJ-6ENF3321V
Series= 225
Res= 3.32 kOhm
Power= 125.0 mW
Tolerance= 1.0%
1
ERJ-6ENF6042V
Series= 225
Res= 60.4 kOhm
Power= 125.0 mW
Tolerance= 1.0%
1
2. Cin
3. Cout
4. Css
5. Renb
6. Rent
7. Rfbb
8. Rfbt
9. Ron
MuRata
Kemet
MuRata
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Copyright © 2015, Texas Instruments Incorporated
®
Footprint
$0.01
2
0805 7 mm
$0.07
1206 11 mm
2
$0.56
2
3528-21 17 mm
$0.01
2
0805 7 mm
$0.01
2
0805 7 mm
$0.01
2
0805 7 mm
$0.01
2
0805 7 mm
$0.01
2
0805 7 mm
$0.01
1
WEBENCH Design Report LMZ14203TZ-ADJ/NOPB : LMZ14203TZ-ADJ/
NOPB 12.0V-22.0V to 3.30V @ 2.0A June 1, 2015 19:29:03 GMT-07:00
2
0805 7 mm
ti.com/webench
®
WEBENCH
# Name
Manufacturer
Part Number
Properties
Qty Price
10. U1
Texas Instruments
LMZ14203TZ-ADJ/NOPB
Switcher
1
Design
Footprint
$9.78
TZA07A 199 mm
Vout p- p
2
Duty Cycle
0 .0 1 7 7 5
3 0 .0
0 .0 1 7 5 0
2 7 .5
0 .0 1 7 2 5
0 .0 1 7 0 0
2 5 .0
0 .0 1 6 7 5
Duty Cycle(%)
Vout p- p(V)
0 .0 1 6 5 0
0 .0 1 6 2 5
0 .0 1 6 0 0
0 .0 1 5 7 5
0 .0 1 5 5 0
0 .0 1 5 2 5
0 .0 1 5 0 0
2 2 .5
2 0 .0
1 7 .5
1 5 .0
1 2 .5
0 .0 1 4 7 5
1 0 .0
0 .0 1 4 5 0
0 .0 1 4 2 5
7 .5
0 .0 1 4 0 0
5 .0
0 .2 5
0 .5 0
0 .7 5
1 .0 0
1 .2 5
1 .5 0
1 .7 5
2 .0 0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Vin= 1 2 .0 V
Efficiency
Vin= 1 7 .0 V
Vin= 2 2 .0 V
M Vds Act
9 2 .5
0 .1 6
0 .1 5
9 0 .0
0 .1 4
0 .1 3
0 .1 2
8 5 .0
M Vds Act(V)
Efficiency(%)
8 7 .5
8 2 .5
8 0 .0
7 7 .5
0 .1 1
0 .1 0
0 .0 9
0 .0 8
0 .0 7
0 .0 6
7 5 .0
0 .0 5
0 .0 4
7 2 .5
0 .0 3
7 0 .0
0 .0 2
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Vin= 1 2 .0 V
Vin= 1 7 .0 V
IC Tj
Cin Pd
0 .0 0 0 8 5
46
0 .0 0 0 8 0
45
0 .0 0 0 7 5
44
0 .0 0 0 7 0
43
0 .0 0 0 6 5
42
0 .0 0 0 6 0
41
0 .0 0 0 5 5
Cin Pd(W)
IC Tj(degC)
Vin= 2 2 .0 V
40
39
38
0 .0 0 0 5 0
0 .0 0 0 4 5
0 .0 0 0 4 0
0 .0 0 0 3 5
37
0 .0 0 0 3 0
36
0 .0 0 0 2 5
0 .0 0 0 2 0
35
0 .0 0 0 1 5
34
0 .0 0 0 1 0
33
0 .0 0 0 0 5
32
0 .0 0 0 0 0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
0 .2 5
0 .5 0
0 .7 5
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Vin= 2 2 .0 V
Copyright © 2015, Texas Instruments Incorporated
®
1 .0 0
1 .2 5
1 .5 0
1 .7 5
2 .0 0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
2
WEBENCH Design Report LMZ14203TZ-ADJ/NOPB : LMZ14203TZ-ADJ/
NOPB 12.0V-22.0V to 3.30V @ 2.0A June 1, 2015 19:29:03 GMT-07:00
Vin= 2 2 .0 V
ti.com/webench
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Cin IRMS
Iin Avg
0 .9 0
0 .6 0
0 .8 5
0 .5 5
0 .8 0
0 .7 5
0 .5 0
0 .7 0
0 .4 5
0 .6 5
Iin Avg(A)
Cin IRMS(A)
Design
0 .6 0
0 .5 5
0 .5 0
0 .4 5
0 .4 0
0 .3 5
0 .4 0
0 .3 5
0 .3 0
0 .2 5
0 .2 0
0 .3 0
0 .1 5
0 .2 5
0 .2 0
0 .1 0
0 .1 5
0 .0 5
0 .1 0
0 .0 0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Vin= 1 2 .0 V
Pout
6 .0
5 .5
5 .0
IC Ipk(A)
Pout(W)
4 .5
4 .0
3 .5
3 .0
2 .5
2 .0
1 .5
1 .0
0 .5
2 .5
2 .4
2 .3
2 .2
2 .1
2 .0
1 .9
1 .8
1 .7
1 .6
1 .5
1 .4
1 .3
1 .2
1 .1
1 .0
0 .9
0 .8
0 .7
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 7 .0 V
Vin= 2 2 .0 V
IC Ipk
6 .5
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Vin= 1 2 .0 V
Cout IRMS
Vin= 1 7 .0 V
Vin= 2 2 .0 V
M Irms
0 .3 2 0
1 .2
0 .3 1 5
1 .1
0 .3 1 0
0 .3 0 5
1 .0
0 .3 0 0
0 .9
0 .2 9 0
M Irms(A)
Cout IRMS(A)
0 .2 9 5
0 .2 8 5
0 .2 8 0
0 .2 7 5
0 .2 7 0
0 .2 6 5
0 .2 6 0
0 .8
0 .7
0 .6
0 .5
0 .2 5 5
0 .4
0 .2 5 0
0 .2 4 5
0 .3
0 .2 4 0
0 .2 3 5
0 .2
0 .2 3 0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Copyright © 2015, Texas Instruments Incorporated
®
Vin= 1 2 .0 V
Vin= 1 7 .0 V
3
WEBENCH Design Report LMZ14203TZ-ADJ/NOPB : LMZ14203TZ-ADJ/
NOPB 12.0V-22.0V to 3.30V @ 2.0A June 1, 2015 19:29:03 GMT-07:00
Vin= 2 2 .0 V
ti.com/webench
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WEBENCH
Cout Pd
Design
Total Pd
0 .8 5
0 .0 0 1 8 5
0 .0 0 1 8 0
0 .8 0
0 .0 0 1 7 5
0 .7 5
0 .0 0 1 7 0
0 .7 0
0 .0 0 1 6 5
0 .6 5
0 .0 0 1 5 5
Total Pd(W)
Cout Pd(W)
0 .0 0 1 6 0
0 .0 0 1 5 0
0 .0 0 1 4 5
0 .0 0 1 4 0
0 .0 0 1 3 5
0 .0 0 1 3 0
0 .0 0 1 2 5
0 .6 0
0 .5 5
0 .5 0
0 .4 5
0 .4 0
0 .3 5
0 .0 0 1 2 0
0 .3 0
0 .0 0 1 1 5
0 .2 5
0 .0 0 1 1 0
0 .2 0
0 .0 0 1 0 5
0 .0 0 1 0 0
0 .1 5
0 .0 0 0 9 5
0 .2 5
0 .5 0
0 .7 5
1 .0 0
1 .2 5
1 .5 0
1 .7 5
2 .0 0
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Output Current (A)
Vin= 2 2 .0 V
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Vin= 2 2 .0 V
IC Pd
0 .8 0
0 .7 5
0 .7 0
0 .6 5
IC Pd(W)
0 .6 0
0 .5 5
0 .5 0
0 .4 5
0 .4 0
0 .3 5
0 .3 0
0 .2 5
0 .2 0
0 .1 5
0 .2 0 .3 0 .4 0 .5 0 .6 0 .7 0 .8 0 .9 1 .0 1 .1 1 .2 1 .3 1 .4 1 .5 1 .6 1 .7 1 .8 1 .9 2 .0
Output Current (A)
Vin= 1 2 .0 V
Vin= 1 7 .0 V
Vin= 2 2 .0 V
Operating Values
#
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Name
Cin IRMS
Cout IRMS
IC Ipk
Iin Avg
M1 Irms
BOM Count
FootPrint
Frequency
IC Tolerance
M Vds Act
Pout
Total BOM
Vout OP
Duty Cycle
Efficiency
IC Tj
ICThetaJA
IOUT_OP
VIN_OP
Vout p-p
Cin Pd
Cout Pd
IC Pd
Total Pd
Value
730.197 mA
280.91 mA
2.487 A
333.64 mA
891.521 mA
12
2
296.0 mm
443.759 kHz
20.0 mV
160.0 mV
6.6 W
$10.62
3.3 V
15.838 %
89.917 %
44.247 degC
19.3 degC/W
2.0 A
22.0 V
17.516 mV
533.187 µW
1.42 mW
738.161 mW
740.1 mW
Category
Current
Current
Current
Current
Current
General
General
General
General
General
General
General
Op_Point
Op_point
Op_point
Op_point
Op_point
Op_point
Op_point
Op_point
Power
Power
Power
Power
Description
Input capacitor RMS ripple current
Output capacitor RMS ripple current
Peak switch current in IC
Average input current
Q Iavg
Total Design BOM count
Total Foot Print Area of BOM components
Switching frequency
IC Feedback Tolerance
Voltage drop across the MosFET
Total output power
Total BOM Cost
Operational Output Voltage
Duty cycle
Steady state efficiency
IC junction temperature
IC junction-to-ambient thermal resistance
Iout operating point
Vin operating point
Peak-to-peak output ripple voltage
Input capacitor power dissipation
Output capacitor power dissipation
IC power dissipation
Total Power Dissipation
Design Inputs
#
1.
2.
3.
Name
Iout
Iout1
VinMax
Value
2.0
2.0
22.0
Copyright © 2015, Texas Instruments Incorporated
®
Description
Maximum Output Current
Output Current #1
Maximum input voltage
4
WEBENCH Design Report LMZ14203TZ-ADJ/NOPB : LMZ14203TZ-ADJ/
NOPB 12.0V-22.0V to 3.30V @ 2.0A June 1, 2015 19:29:03 GMT-07:00
ti.com/webench
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#
4.
5.
6.
7.
8.
9.
Name
VinMin
Vout
Vout1
base_pn
source
Ta
Value
12.0
3.3
3.3
LMZ14203
DC
30.0
Design
Description
Minimum input voltage
Output Voltage
Output Voltage #1
Base Product Number
Input Source Type
Ambient temperature
Design Assistance
1. LMZ14203 Product Folder : http://www.ti.com/product/LMZ14203 : contains the data sheet and other resources.
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WEBENCH Design Report LMZ14203TZ-ADJ/NOPB : LMZ14203TZ-ADJ/
NOPB 12.0V-22.0V to 3.30V @ 2.0A June 1, 2015 19:29:03 GMT-07:00
ti.com/webench