Diodes-Incorporated-DMC1028UFDB-13

Part #Diodes-Incorporated-DMC1028UFDB-13
Download 
Diodes-Incorporated-DMC1028UFDB-13
DMC1028UFDB  
COMPLEMENTARY PAIR ENHANCEMENT MODE MOSFET  
Product Summary  
Features  
Low On-Resistance  
I

D

max  
T

A

= +25°C  
Device  
BV

DSS  

R

DS(ON)

max  
Low Input Capacitance  
Low Profile, 0.6mm Max Height  
6.0A  
5.5A  
5.3A  
-3.4A  
-3.2A  
-3.0A  
25m
Ω @ V

GS

= 4.5V  
30m
Ω @ V

GS

= 3.3V  
32m
Ω @ V

GS

= 2.5V  
80m
Ω
@ V

GS

= -4.5V  
90m
Ω @ V

GS

= -3.3V  
100m
Ω @ V

GS

= -2.5V  
Q1  
N-Channel  
12V  
ESD HBM Protected up to 1.5kV, MM Protected up to 150V  
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  
Halogen and Antimony Free. “Green” Device (Note 3)  
For automotive applications requiring specific change control  
(i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and  
manufactured in IATF 16949 certified facilities), please  

contact us

or your local Diodes representative.  
Q2  
P-Channel  
-20V  
Mechanical Data  
Description  
Case: U-DFN2020-6  
This MOSFET is designed to minimize the on-state resistance  
(R

DS(ON)

) and yet maintain superior switching performance, making it  
ideal for high-efficiency power management applications.  
Case Material: Molded Plastic, “Green” Molding Compound.  
UL Flammability Classification Rating 94V-0  
Moisture Sensitivity: Level 1 per J-STD-020  
Terminals: Finish NiPdAu over Copper Leadframe.  
Applications  
e4  
Solderable per MIL-STD-202, Method 208  
Terminals Connections: See Diagram Below  
Weight: 0.0065 grams (Approximate)  
Optimized for Point of Load (POL) Synchronous Buck Converter that  
steps down from 3.3V to 1V for core voltage supply to ASICs. Target  
applications are Ethernet Network Controllers used in:  
Routers, Switchers, Network Interface Controllers (NICs)  
Digital Subscriber Line (DSL)  
Set-Top Boxes (STBs)  
U-DFN2020-6 (Type B)  
S2  
D2  
S2  
D1  
S1  
G2  
D2  
D1  
G2  
G1  
D1  
D2  
G1  
ESD PROTECTED  
S1  
Gate Protection  
Diode  
Gate Protection  
Diode  
Pin1  
Bottom View  
N-CHANNEL MOSFET  
P-CHANNEL MOSFET  
Internal Schematic  
Ordering Information
(Note 4)  
Part Number  
DMC1028UFDB
-7  
DMC1028UFDB
-13  
Case  
Packaging  
3,000/Tape & Reel  
10,000/Tape & Reel  
U-DFN2020-6 (Type B)  
U-DFN2020-6 (Type B)  
Notes:  
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.  

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen
– and Antimony-free, “Green” and  
Lead-free.  
3. Halogen- and Antimony-
free “Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and  
<1000ppm antimony compounds.  
1 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Marking Information  
Site 1  
D8 = Product Type Marking Code  
YM = Date Code Marking  
Y = Year (ex: H = 2020)  
D8  
M = Month (ex: 9 = September)  
Date Code Key  
Year  
2014  
…
2020  
2021  
2022  
2023  
2024  
2025  
2026  
2027  
2028  
2029  
Code  
B
…
H
I
J
K
L
M
N
O
P
R
Month  
Code  
Jan  
1
Feb  
2
Mar  
3
Apr  
4
May  
5
Jun  
6
Jul  
7
Aug  
8
Sep  
9
Oct  
O
Nov  
N
Dec  
D
Site 2  
D8 = Product Type Marking Code  
YWX = Date Code Marking  
Y = Year (ex: 0 = 2020)  
W = Week (ex: a = Week 27; z Represents Week 52 and 53)  
X = Internal Code (ex: U = Monday)  
D8  
Date Code Key  
Year  
2014  
…
2020  
2021  
2022  
2023  
2024  
2025  
2026  
2027  
2028  
2029  
Code  
4
…
0
1
2
3
4
5
6
7
8
9
Week  
Code  
1-26  
A-Z  
27-52  
a-z  
53  
z
Internal Code  
Code  
Sun  
T
Mon  
U
Tue  
V
Wed  
W
Thu  
X
Fri  
Y
Sat  
Z
2 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Maximum Ratings
(@T

A

= +25°C, unless otherwise specified.)  
Q1  
Q2  
Characteristic  
Symbol  
Unit  
N-CHANNEL P-CHANNEL  
Drain-Source Voltage  
Gate-Source Voltage  
12  
±8  
-20  
±8  
V
V
V

DSS  

V

GSS  

Steady  
State  
T

A

= +25°C  
T

A

= +70°C  
T

A

= +25°C  
T

A

= +70°C  
6.0  
4.8  
-3.4  
-2.7  
A
A
Continuous Drain Current (Note 5)  
N-Channel: V

GS

= 4.5V  
P-Channel: V

GS

= -4.5V  
I

D  

I

D  

7.1  
5.7  
-4.0  
-3.2  
t < 5s  
-1.4  
-20  
-12  
7.5  
Maximum Continuous Body Diode Forward Current (Note 5)  
Pulsed Drain Current (10µs Pulse, Duty Cycle = 1%)  
Avalanche Current L = 0.1mH  
1.4  
40  
A
A
I

S  

I

DM  

I

AS  

12  
A
Avalanche Energy L = 0.1mH  
8.4  
mJ  
E

AS  

Thermal Characteristics  
Characteristic  
Symbol  
Value  
Unit  
Steady State  
1.36  
1.89  
92  
66  
19  
Total Power Dissipation (Note 5)  
W
P

D  

t < 5s  
Steady State  
t < 5s  
Thermal Resistance, Junction to Ambient (Note 5)  
R

θ
JA  

°C/W  
°C  
Thermal Resistance, Junction to Case (Note 5)  
Operating and Storage Temperature Range  
R

θ
JC  

-55 to +150  
T

J,

T

STG  

Note:  
5.
Device mounted on 1”
1” FR
-4 PCB with high coverage 2oz. Copper, single sided.  
Electrical Characteristics Q1 N-CHANNEL
(@T

A

= +25°C, unless otherwise specified.)  
Characteristic  
OFF CHARACTERISTICS (Note 6)  
Drain-Source Breakdown Voltage  
Symbol  
Min  
Typ  
Max  
Unit  
Test Condition  
—
—
—
—
1.0  
±10  
12  
—
—
V
BV

DSS  

I

DSS  

V

GS

= 0V, I

D

= 250μA  
V

DS

= 12V, V

GS

= 0V  
V

GS

= ±8V, V

DS

= 0V  
μA  
μA  
Zero Gate Voltage Drain Current T

J

= +25°C  
Gate-Source Leakage  
I

GSS  

ON CHARACTERISTICS (Note 6)  
Gate Threshold Voltage  
0.4  
—
—
—
—
—
—
17  
19  
21  
30  
0.7  
1
V
m
Ω  
V
V

GS(TH)  

R

DS(ON)  

V

SD  

V

DS

= V

GS

, I

D

= 250
μA  
V

GS

= 4.5V, I

D

= 5.2A  
V

GS

= 3.3V, I

D

= 5.0A  
V

GS

= 2.5V, I

D

= 4.8A  
V

GS

= 1.8V, I

D

= 2.5A  
V

GS

= 0V, I

S

= 1A  
25  
30  
32  
40  
1.2  
Static Drain-Source On-Resistance  
Diode Forward Voltage  
DYNAMIC CHARACTERISTICS (Note 7)  
Input Capacitance  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
787  
203  
177  
4.8  
pF  
pF  
pF  
Ω
C

iss  

C

oss  

C

rss  

R

g  

V

DS

= 6V, V

GS

= 0V,  
f = 1.0MHz  
Output Capacitance  
Reverse Transfer Capacitance  
Gate Resistance  
V

DS

= 0V, V

GS

= 0V, f = 1MHz  
7.9  
nC  
nC  
nC  
nC  
nC  
ns  
ns  
ns  
ns  
ns  
nC  
Total Gate Charge (V

GS

= 3.3V)  
Total Gate Charge (V

GS

= 4.5V)  
Total Gate Charge (V

GS

= 8V)  
Gate-Source Charge  
10.5  
18.5  
1.2  
Q

g  

V

DS

= 6V, I

D

= 6.8A  
Q

gs  

Q

gd  

t

D(ON)  

t

R  

Gate-Drain Charge  
2.9  
Turn-On Delay Time  
4.6  
Turn-On Rise Time  
9.4  
V

DD

= 6V, V

GS

= 4.5V,  
R

L

= 1.1
Ω, R

G

= 1
Ω  
Turn-Off Delay Time  
15.7  
3.7  
t

D(OFF)  

t

F  

Turn-Off Fall Time  
Body Diode Reverse Recovery Time  
Body Diode Reverse Recovery Charge  
12.0  
1.8  
t

RR  

I

S

= 5.4A, dI/dt = 100A/
μ
s  
I

S

= 5.4A, dI/dt = 100A/
μ
s  
Q

RR  

Notes:  
6. Short duration pulse test used to minimize self-heating effect.  
7. Guaranteed by design. Not subject to product testing.  
3 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Electrical Characteristics Q2 P-CHANNEL
(@T

A

= +25°C, unless otherwise specified.)  
Characteristic  
OFF CHARACTERISTICS (Note 6)  
Drain-Source Breakdown Voltage  
Symbol  
Min  
Typ  
Max  
Unit  
Test Condition  
-20  
—
—
—
—
—
V
BV

DSS  

I

DSS  

V

GS

= 0V, I

D

= –
250μA  
V

DS

= -20V, V

GS

= 0V  
V

GS

= ±8V, V

DS

= 0V  
-1.0  
±10  
μA  
μA  
Zero Gate Voltage Drain Current T

J

= +25°C  
Gate-Source Leakage  
—
I

GSS  

ON CHARACTERISTICS (Note 6)  
Gate Threshold Voltage  
-0.4  
—
—
55  
-1  
V
m
Ω  
V
V

GS(TH)  

R

DS(ON)  

V

SD  

V

DS

= V

GS

, I

D

= -250
μA  
V

GS

= -4.5V, I

D

= -3.8A  
V

GS

= -3.3V, I

D

= -3.5A  
V

GS

= -2.5V, I

D

= -3.3A  
V

GS

= -1.8V, I

D

= -1.0A  
V

GS

= -1.5V, I

D

= -0.5A  
V

GS

= 0V, I

S

= -1A  
80  
—
63  
90  
—
Static Drain-Source On-Resistance  
70  
100  
140  
210  
-1.2  
—
88  
—
110  
-0.7  
—
Diode Forward Voltage  
DYNAMIC CHARACTERISTICS (Note 7)  
Input Capacitance  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
576  
87  
pF  
pF  
pF  
Ω
C

iss  

C

oss  

C

rss  

R

g  

V

DS

= -10V, V

GS

= 0V,  
f = 1.0MHz  
Output Capacitance  
Reverse Transfer Capacitance  
Gate Resistance  
71  
15  
V

DS

= 0V, V

GS

= 0V, f = 1MHz  
5.2  
6.7  
11.5  
1.0  
2.0  
3.5  
3.6  
20.8  
12.7  
13.1  
3.9  
nC  
nC  
nC  
nC  
nC  
ns  
ns  
ns  
ns  
ns  
nC  
Total Gate Charge (V

GS

= -3.3V)  
Total Gate Charge (V

GS

= -4.5V)  
Total Gate Charge (V

GS

= -8V)  
Gate-Source Charge  
Q

g  

V

DS

= -10V, I

D

= -4.9A  
Q

gs  

Q

gd  

t

D(ON)  

t

R  

Gate-Drain Charge  
Turn-On Delay Time  
Turn-On Rise Time  
V

DD

= -10V, V

GS

= -4.5V,  
R

L

= 2.6
Ω, R

G

= 1
Ω  
Turn-Off Delay Time  
t

D(OFF)  

t

F  

Turn-Off Fall Time  
Body Diode Reverse Recovery Time  
Body Diode Reverse Recovery Charge  
t

RR  

I

S

= -3.9A, dI/dt = 100A/
μ
s  
I

S

= -3.9A, dI/dt = 100A/
μ
s  
Q

RR  

Notes:  
6. Short duration pulse test used to minimize self-heating effect.  
7. Guaranteed by design. Not subject to product testing.  
4 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Typical Characteristics – N-CHANNEL  
15  
12  
9
20.0  
V

DS

= 5V  
V

GS

= 1.8V  
18.0  
16.0  
14.0  
12.0  
10.0  
8.0  
V

GS

= 4.5V  
V

GS

= 3.5V  
V

GS

= 3.0V  
T

A

= 125

o

C  
V

GS

= 2.5V  
T

A

= -55

o

C  
V

GS

= 1.5V  
V

GS

= 2.0V  
6
6.0  
T

A

= 25

o

C  
T

A

= 85

o

C  
T

A

= 150

o

C  
4.0  
3
V

GS

= 1.2V  
V

GS

= 1.1V  
2.0  
0.0  
0
0
0.5  
1
1.5  
2
2.5  
3
0
0.5  
1
1.5  
2
2.5  
3
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
Figure 1 Typical Output Characteristic  
V

GS

, GATE-SOURCE VOLTAGE (V)  
Figure 2 Typical Transfer Characteristic  
0.05  
0.1  
0.09  
0.08  
0.07  
0.06  
0.05  
0.04  
0.03  
0.02  
0.01  
0
0.045  
0.04  
V
= 1
.
8
V  
GS  
0.035  
0.03  
V
= 2
.
5
V  
0.025  
0.02  
GS  
I

D

= 2.5A  
I

D

= 4.8A  
I

D

= 5.2A  
0.015  
0.01  
V
= 3
.
3
V  
GS  
V
= 4
.
5
V  
GS  
0.005  
0
0
2
4
6
8
10 12 14 16 18 20  
1
2
3
4
5
6
7
8
I

D

, DRAIN-SOURCE CURRENT (A)  
Figure 3
T
y
pical On-Resistance vs.  
Drain Current and Gate Voltage  
V

GS

, GATE-SOURCE VOLTAGE (V)  
Figure 4 Typical Transfer Characteristic  
0.03  
0.025  
0.02  
1.8  
1.6  
1.4  
1.2  
1
V

GS

= 4.5V  
T

A

= 125

o

C  
T

A

= 150

o

C  
V

GS

= 4.5V, I

D

= 10A  
T

A

= 85

o

C  
T

A

= 25

o

C  
T

A

= -55

o

C  
0.015  
0.01  
V

GS

= 1.8V, I

D

= 3A  
0.8  
0.6  
0.005  
0
2
4
6
8
10 12 14 16 18 20  
-50 -25  
0
25  
50  
75 100
 
125 150  
I

D

, DRAIN CURRENT (A)  
Figure 5 Typical On-Resistance vs. Drain Current  
and Temperature  
T

J

, JUNCTION TEMPERATURE (
℃
)  
Figure 6 On-Resistance Variation with  
Temperature  
5 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Typical Characteristics – N-CHANNEL
(continued)  
0.05  
0.045  
0.04  
1.2  
1.1  
1
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
V

GS

= 1.8V, I

D

= 3A  
0.035  
I

D

= 1mA  
0.03  
0.025  
0.02  
I

D

= 250µA  
0.015  
V

GS

= 4.5V, I

D

= 10A  
0.01  
0.005  
0
-50 -25  
0
25  
50  
75 100
 
125 150  
-50 -25  
0
25  
50  
75 100
 
125 150  
T

J

, JUNCTION TEMPERATURE (
℃
)  
T

J

, JUNCTION TEMPERATURE (
℃
)  
Figure 7 On-Resistance Variation with Temperature  
Figure 8 Gate Threshold Variation vs. Junction  
Temperature  
20  
18  
16  
14  
12  
10  
8
10000  
1000  
100  
f = 1MHz  
V

GS

= 0V  
C

iss  

T

A

= 125

o

C  
C

oss  

T

A

= -55

o

C  
C

rss  

T

A

= 25

o

C  
T

A

= 150

o

C  
6
4
T

A

= 85

o

C  
1.2  
2
0
10  
0
0.3  
0.6  
0.9  
1.5  
0
2
4
6
8
10  
12  
V

SD

, SOURCE-DRAIN VOLTAGE (V)  
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
Figure 10 Typical Junction Capacitance  
Figure 9 Diode Forward Voltage vs. Current  
8
6
4
2
0
100  
10  
R

DS(ON)  

Limited  
DC  
1
P

W

=10s  
P

W

=1s  
T

J(Max)

= 150
℃  
T

A

= 25
℃  
V

GS

= 4.5V  
Single Pulse  
DUT on 1*MRP  
Board  
V

DS

= 6V, I

D

= 6.8A  
P

W

=100ms  
0.1  
0.01  
P

W

=10ms  
P

W

=1ms  
P

W

=100µs  
0
2
4
6
8
10 12 14 16 18 20  
Q

g

(nC)  
Fiure 11 Gate Charge  
0.01  
0.1  
1
10  
100  
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
Figure 12 SOA, Safe Operation Area  
6 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Typical Characteristics – P-CHANNEL  
20.0  
10  
8
V

GS

= -4.5V  
V

GS

= -3.0V  
18.0  
16.0  
14.0  
12.0  
10.0  
8.0  
V

DS

= -5V  
V

GS

= -3.5V  
V

GS

= -2.5V  
V

GS

= -2.0V  
6
V

GS

= -1.8V  
4
T

A

= 125

o

C  
T

A

= 150

o

C  
6.0  
V

GS

= -1.5V  
V

GS

= -1.2V  
T

A

= -55

o

C  
2
4.0  
T

A

= 25

o

C  
T

A

= 85

o

C  
2.0  
0
0.0  
0
0.5  
1
1.5  
2
2.5  
3
0
1
2
3
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
V

GS

, GATE-SOURCE VOLTAGE (V)  
Figure 13 Typical Output Characteristic  
Figure 14 Typical Transfer Characteristic  
0.3  
0.25  
0.2  
0.3  
0.25  
0.2  
V
= -1.5V  
GS  
I

D

= -3.8A  
I

D

= -3.3A  
V
= -1.8V  
GS  
0.15  
0.1  
0.15  
0.1  
V
= -2.5V  
GS  
I

D

= -1.0A  
0.05  
0
0.05  
0
V
= -4.5V  
V
= -3.3V  
GS  
GS  
1
3
5
7
9
11 13 15 17 19 21  
0
2
4
6
8
I

D

, DRAIN-SOURCE CURRENT (A)  
Figure 15
T
y
pical On-Resistance vs.  
Drain Current and Gate Voltage  
V

GS

, GATE-SOURCE VOLTAGE (V)  
Figure 16 Typical Transfer Characteristic  
1.8  
1.6  
1.4  
1.2  
1
0.12  
0.1  
V

GS

= -4.5V  
T

A

= 125

o

C  
T

A

= 150

o

C  
V

GS

= -4.5V, I

D

= -5.0A  
0.08  
0.06  
0.04  
0.02  
T

A

= 85

o

C  
T

A

= 25

o

C  
V

GS

= -1.8V, I

D

= -1.0A  
T

A

= -55

o

C  
0.8  
0.6  
-50 -25  
0
25  
50  
75 100
 
125 150  
1
3
5
7
9
11 13 15 17 19 21  
I

D

, DRAIN CURRENT (A)  
T

J

, JUNCTION TEMPERATURE (
℃
)  
Figure 17 Typical On-Resistance vs. Drain Current  
and Temperature  
Figure 18 On-Resistance Variation with  
Temperature  
7 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Typical Characteristics – P-CHANNEL
(continued)  
0.14  
1
0.8  
0.6  
0.4  
0.2  
0
0.12  
V

GS

= -1.8V, I

D

= -1.0A  
0.1  
I

D

= -1mA  
0.08  
0.06  
I

D

= -250µA  
0.04  
V

GS

= -4.5V, I

D

= -5.0A  
0.02  
0
-50 -25  
0
25  
50  
75 100
 
125 150  
-50 -25  
0
25  
50  
75 100
 
125 150  
T

J

, JUNCTION TEMPERATURE (
℃
)  
T

J

, JUNCTION TEMPERATURE (
℃
)  
Figure 19 On-Resistance Variation with  
Temperature  
Figure 20 Gate Threshold Variation vs. Junction  
Temperature  
10000  
1000  
100  
20  
18  
16  
14  
12  
10  
8
f = 1MHz  
V

GS

= 0V  
C

iss  

T

A

= 150

o

C  
T

A

= 125

o

C  
C

oss  

6
T

A

= 25

o

C  
T

A

= 85

o

C  
C

rss  

4
2
T

A

= -55

o

C  
10  
0
0
2
4
6
8
10 12 14 16 18 20  
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
Figure 22 Typical Junction Capacitance  
0
0.3  
0.6  
0.9  
1.2  
1.5  
V

SD

, SOURCE-DRAIN VOLTAGE (V)  
Figure 21 Diode Forward Voltage vs. Current  
8
6
4
2
0
100  
10  
R

DS(ON)  

Limited  
1
DC  
P

W

=10s  
T

J(Max)

= 150
℃  
P

W

=1s  
P

W

=100ms  
T

A

= 25
℃  
V

GS

= -4.5V  
Single Pulse  
DUT on 1*MRP  
Board  
V

DS

= -10V, I

D

= -4.9A  
0.1  
0.01  
P

W

=10ms  
P

W

=1ms  
P

W

=100µs  
10  
0.1  
1
100  
0
2
4
6
8
10  
12  
V

DS

, DRAIN-SOURCE VOLTAGE (V)  
Figure 24 SOA, Safe Operation Area  
Q

g

(nC)  
Figure 23 Gate Charge  
8 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
1
D=0.5  
D=0.3  
D=0.9  
D=0.7  
0.1  
D=0.1  
D=0.05  
D=0.02  
D=0.01  
D=0.005  
0.01  
0.001  
R

θ
JA

(t)=r(t) * R

θ
JA  

R

θ
JA

=166
℃
/W  
Duty Cycle, D=t1/t2  
D=Single Pulse  
0.0001  
1E-05  
0.001  
0.01  
0.1  
1
10  
100  
1000  
t1, PULSE DURATION TIME (sec)  
Figure 25 Transient Thermal Resistance  
Typical Application Circuit  
DMC1028UFDB is designed for Point-of-Load (POL) converter that is stepping down from a nominal 3.3V to 1V with a load current up to 3A. This  
is implemented with a separate ASIC that is PWM signaling the complementary MOSFETs to act as a synchronous buck converter. The control  
switch (Q2) is implemented with P-channel MOSFETs to avoid needing a charge pump and with the 3.3V to 1V step down, which has a duty cycle  
of 33%. This means that for 67% of the cycle, the synchronous switch (Q1) is on and efficiency is dominated by the conduction losses; hence, the  
need for low R

DS(ON)

N-channel MOSFETs. Whereas for the control switch (Q2), the gate charge needs to be minimized as the switching losses  
become significant.  
9 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
Package Outline Dimensions  
Please see

for the latest version.  
U-DFN2020-6 (Type B)  
A3  
A1  
A
U-DFN2020-6  
Type B  
Min Max Typ  
0.545 0.605 0.575  
0.00 0.05 0.02  
Seating Plane  
Dim  
A
A1  
A3  
b
D
D2  
e
D
–
–
0.13  
D2  
D2  
0.20 0.30 0.25  
1.95 2.075 2.00  
0.50 0.70 0.60  
R
0
.150  
–
–
0.65  
E
E2  
k
1.95 2.075 2.00  
0.90 1.10 1.00  
z1  
–
–
0.45  
E
E2  
z1  
L
0.25 0.35 0.30  
k
z
z1  
–
–
–
–
0.225  
0.175  
All Dimensions in mm  
L
e
z
b
Suggested Pad Layout  
Please see

for the latest version.  
U-DFN2020-6 (Type B)  
X2  
C
Value  
Dimensions  
(in mm)  
C
G
G1  
X
X1  
X2  
Y
Y1  
Y2  
0.650  
0.150  
0.450  
0.350  
0.600  
1.650  
0.500  
1.000  
2.300  
X1(2x)  
Y1(2x)  
Y2  
G
Y
G1  
X
10 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2  

DMC1028UFDB  
IMPORTANT NOTICE  
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,  
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).  
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes  
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the  
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or  
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume  
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated  
website, harmless against all damages.  
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.  
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and  
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or  
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.  
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings  
noted herein may also be covered by one or more United States, international or foreign trademarks.  
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the  
final and determinative format released by Diodes Incorporated.  
LIFE SUPPORT  
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express  
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:  
A. Life
 
support devices or systems are devices or systems which:  
1. are intended to implant into the body, or  
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the  
labeling can be reasonably expected to result in significant injury to the user.  
B. A
 
critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the  
failure of the life support device or to affect its safety or effectiveness.  
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and  
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any  
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related  
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its  
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.  
Copyright © 2020, Diodes Incorporated  
11 of 11  
February 2020  
© Diodes Incorporated  
DMC1028UFDB  
Document number: DS37634
 
Rev. 5 – 2