AP65455

AP65455
4A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER
Description
Pin Assignments
The AP65455 is an adaptive, constant on-time mode synchronous
buck converter, providing high-efficiency, excellent transient response
and high DC output accuracy for low-voltage regulation in digital
TVs and monitors.
The constant-on-time control scheme handles wide input/output
voltage ratios and provides low external component count. The
internal proprietary circuit enables the device to adopt both low
equivalent series resistance (ESR) output capacitors, such as
SP-CAP or POSCAP and ultra-low ESR ceramic capacitors.
( Top View )
EN
FB
VREG5
SS
PGOOD
1
2
3
4
5
10
Exposed
Pad
11
PGND
VIN
9
VIN
8
BS
7
SW
6
SW
U-DFN3030-10
The adaptive on-time control supports seamless transition between
continuous conduction mode (CCM) at higher load conditions and
discontinuous conduction mode (DCM) at lighter load conditions.
DCM allows AP65455 to maintain high efficiency at light load
conditions. The AP65455 also features power good, programmable
soft-start, UVLO, OTP, OVP and OCP to protect the circuit.
This IC is available in U-DFN3x3-10 package.
Applications







Gaming Consoles
Flat Screen TV Sets and Monitors
Set-Top Boxes
Home Audio
Consumer Electronics
Network Systems
Green Electronics
Features















Fixed Frequency Emulated Constant On-Time Control
Good Stability Independent of the Output Capacitor ESR
Fast Load Transient Response
Synchronous Rectification: 90mΩ Internal High-side Switch and
57mΩ Internal Low-Side Switch
Wide Input Voltage Range: 4.5V to 18V
Output Voltage Range: 0.76V to 6V
4A Continuous Output Current
650kHz Switching Frequency
Built-in Over Current Limit
Built-in Over Voltage Protection
Built-in Thermal Shutdown Protection
Programmable Soft-Start
Pre-Biased Start-Up
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html 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.
AP65455
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AP65455
Typical Applications Circuit
INPUT
VIN
12V
ON
OFF
IN
BST
EN
SW
C1
0.1µF
AP65455
PGOOD
R2
100kΩ
C2
20μF
VREG5
L1
1.5μH
R1
8.25kΩ
PGOOD
FB
VREG5
SS
C3
44μF
C5
1µF
PGND
C4
8.2nF
R3
22.1kΩ
OUTPUT
VOUT
1.05V
Figure 1 Typical Application Circuit
Pin Descriptions
Pin
Name
Package
Function
U-DFN3x3-10
EN
1
Enable input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the
regulator, drive it low to turn off. It can be safely connected to VIN directly for automatic startup.
FB
2
Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage
divider connected to it from the output voltage.
VREG5
3
Internal power supply output pin to connect an additional capacitor. Connect a 1μF (typical)
capacitor as close as possible to the VREG5 and GND. This pin is not active when EN is low.
SS
4
Soft-start control input pin. SS controls the soft start period. Connect a capacitor from SS to GND
to set the soft-start period.
SW
6,7
Power Switching Output. SW is the switching node that supplies power to the output. Connect the
output LC filter from SW to the output load. Note that a capacitor is required from SW to BS to
power the high-side switch.
BS
8
VIN
9,10
PGOOD
5
PGND
11 (Exposed
Pad)
Bootstrap pin. A bootstrap capacitor is connected between the BS pin and SW pin. The voltage
across the bootstrap capacitor drives the internal high-side NMOS switch. A 0.1μF (typical)
capacitor is required for proper operation.
Supply input. A capacitor should be connected between the VIN pin and GND pin to keep the DC
input voltage constant.
Open drain power good output.
Power ground. Exposed pad must be connected to GND plane and connected to PGND for
maximum power dissipation.
AP65455
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AP65455
Functional Block Diagram
Figure 2 Functional Block Diagram
AP65455
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AP65455
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
Symbol
VIN
Parameter
Unit
-0.3 to 20
V
VREG5
VREG5 Pin Voltage
-0.3V to +6.0
V
VSW
Switch Node Voltage
-1.0 to VIN +0.3
V
VBS
Bootstrap Voltage
-0.3 to VSW +6.0
V
VFB
Feedback Voltage
-0.3V to +6.0
V
VEN
Enable/UVLO Voltage
-0.3V to VIN
V
VSS
Soft-start PIN
-0.3V to +6.0
V
VGND
Supply Voltage
Rating
GND Pin Voltage
-0.3 to 0.3
V
TST
Storage Temperature
-65 to +150
°C
TJ
Junction Temperature
+160
°C
TL
Lead Temperature
+260
°C
ESD Susceptibility (Note 5)
Notes:
HBM
Human Body Model
MM
Machine Model
2
kV
200
V
4. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may
be affected by exposure to absolute maximum rating conditions for extended periods of time.
5. Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when
handling and transporting these devices.
Thermal Resistance (Note 6)
Symbol
Parameter
Rating
Unit
θJA
Junction to Ambient
U-DFN3030-10
45.87
°C/W
θJC
Junction to Case
U-DFN3030-10
6.91
°C/W
Recommended Operating Conditions (Note 7) (@TA = +25°C, unless otherwise specified.)
Symbol
Notes:
Parameter
Min
Max
Unit
VIN
Supply Voltage
4.5
18.0
V
TJ
Operating Junction Temperature Range
-40
+125
°C
TA
Operating Ambient Temperature Range
-40
+85
°C
6. Test condition: Device mounted on 1"x1" FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
7. The device function is not guaranteed outside of the recommended operating conditions.
AP65455
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AP65455
Electrical Characteristics
Parameter
SUPPLY VOLTAGE (VIN PIN)
Input Voltage
(@TA = +25°C, VIN = 12V, unless otherwise specified.)
Symbol
Conditions
Min
Typ
Max
Unit
VIN
—
4.5
—
18
V
0.6
0.75
mA
10
μA
VFB=0.85V
—
ISHDN
VEN=0V
—
1
UVLO Threshold
VUVLO
VIN Rising Test VREG5 Voltage
3.6
3.85
4.1
V
UVLO Hysteresis
VHYS
VIN Falling Test VREG5 Voltage
0.16
0.35
0.47
V
EN High-level Input Voltage
VENH
—
1.25
—
18
V
EN Low-level Input Voltage
VENL
—
—
—
0.85
V
Quiescent Current
Shutdown Supply Current
IQ
UNDER VOLTAGE LOCKOUT
ENABLE (EN PIN)
VOLTAGE REFERENCE (FB PIN)
Feedback Voltage
VFB
VOUT=1.05V
0.753
0.765
0.777
V
Feedback Bias Current
IFB
VFB=0.8V
-0.1
0
0.1
μA
VREG5 OUTPUT
VREG5 Output Voltage
6.0V<VIN<18V 0<IVREG5<5mA
4.8
5.1
5.4
V
Source Current Capability
—
VIN=6V, VVREG5=4V
—
100
—
mA
Load Regulation
—
0<IVREG5<5mA
—
—
100
mV
Line Regulation
—
6.0V<VIN<18V IVREG5=5mA
—
—
20
mV
VVREG5
MOSFET
High-side Switch On-resistance
RDSONH
—
—
0.090
—
Ω
Low-side Switch On-resistance
RDSONL
—
—
0.057
—
Ω
L=1.5μH
4.6
5.6
6.9
A
VIN=12V, VOUT=1.05V
—
150
—
ns
VFB=0.7V
—
260
310
ns
CURRENT LIMIT
High Level Current Limit
ILIM-H
ON-TIME TIMER
On Time
Minimum Off Time
tON
tOFF-MIN
THERMAL SHUTDOWN
Thermal Shutdown
TOTSD
—
—
150
—
°C
Thermal Shutdown Hysteresis
THYS
—
—
25
—
°C
SOFT START (SS PIN)
Soft-start Source Current
Soft-start Discharge Current
ISS-SOURCE
VSS=1.0V
4.2
6.0
7.8
μA
ISS-DISCHARGE
VSS=0.5V
0.1
0.2
—
mA
%
Over Voltage Protection
OVP Trip Threshold
POWER GOOD
PGOOD Threshold
PGOOD Sink Current
AP65455
Document number: DS37994 Rev. 1 - 2
—
—
115
120
125
—
VFB Rising
85
90
95
—
VFB Falling
—
85
—
—
PGOOD = 0.5V
—
5
—
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%
mA
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AP65455
Typical Performance Characteristics (@TA = +25°C, VIN = 12V, VOUT = 1.05V, unless otherwise specified.)
85˚C
25˚C
VIN=18V
-40˚C
VIN=12V
VIN=4.5V
VIN=18V
85˚C
25˚C
VIN=12V
-40˚C
VIN=4.5V
VO=3.3V
VIN=18V
VO=2.5V
VIN=12V
VIN=4.5V
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AP65455
Typical Performance Characteristics (continued) (@TA = +25°C, VIN = 12V, VOUT = 1.05V, unless otherwise specified.)
VO=2.5V
VIN=4.5V
VO=3.3V
VIN=12V
VIN=18V
VO=5V
VO=3.3V
VO=2.5V
VO=1.05V
VO=1.2V
VO=1.8V
VO=3.3V
VO=5V
VO=2.5V
VO=1.05V
VO=1.2V
VO=1.8V
AP65455
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AP65455
Typical Performance Characteristics (cont.)
(@TA = +25°C, VIN = 12V, VOUT = 1.05V, L = 1.5µH, C1 = 20µF, C2 = 44µF, unless otherwise specified.)
Startup Through VEN 4A Load
Startup Through VIN 4A Load
Short Circuit Test
VOUT (500mV/DIV)
VEN (5V/DIV)
VIN (12V/DIV)
VOUT (1V/DIV)
VOUT (1V/DIV)
IOUT (4A/DIV)
IOUT (4A/DIV)
SW (10V/DIV)
SW (10V/DIV)
Time-1ms/div
Shutdown Through VEN 4A Load
VEN (5V/DIV)
IOUT (2A/DIV)
Time-1ms/div
Time-200µs/div
Shutdown Through VIN 4A Load
Short Circuit Recovery
VIN (12V/DIV)
VOUT (500mV/DIV)
VOUT (1V/DIV)
VOUT (1V/DIV)
IOUT (4A/DIV)
IOUT (4A/DIV)
SW (10V/DIV)
IOUT (2A/DIV)
SW (10V/DIV)
Time-50µs/div
Time-200µs/div
Load Transient Response (0 to 4A)
Load Transient Response (1 to 4A)
Time-1ms/div
Switching State 4A Load
VOUT_AC (50mV/DIV)
VOUT_AC (50mV/DIV)
VOUT_AC (50mV/DIV)
IL (2A/DIV)
IOUT (2A/DIV)
IOUT (2A/DIV)
Time-100µs/div
Startup with VREG5
EN (5V/DIV)
Time-100µs/div
Power Good Rising 4A Load
Time-1µs/div
Power Good Falling 4A Load
VEN (5V/DIV)
VEN (5V/DIV)
PGOOD (5V/DIV)
PGOOD (5V/DIV)
VREG5 (5V/DIV)
VOUT (1V/DIV)
VOUT (500mV/DIV)
VOUT (1V/DIV)
IOUT (4A/DIV)
IOUT (4A/DIV)
Time-1ms/div
Time-500µs/div
DCM Voltage Ripple (IO=30mA)
Voltage Ripple at Input (IO=4A)
Time-2ms/div
VIN_AC (100mV/DIV)
VOUT_AC (100mV/DIV)
IL (2A/DIV)
SW (5V/DIV)
Time-1µs/div
AP65455
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Time-1µs/div
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AP65455
Application Information
R4
JP1
EN
VIN
VOUT
VIN
100KΩ
1
2
R1
8.25KΩ
R3
22.1KΩ
C10
3
EN
VIN
VREG5
R2
5
PGOOD
100KΩ 4
SS
C4
EP
C6
1µF
8.2nF
9, 10
C8
10µF
C1
AP65455
FB
C2
10µF
BS
SW
PGND
8
6, 7
0.1µF
VOUT
1.5µH
L1
11
C5
22µF
C9
22µF
Figure 3 Typical Application of AP65455 evaluation board
PWM Operation and Adaptive On-time Control
The AP65455 is a synchronous step-down converter with internal power MOSFETs. Adaptive constant on time (COT) control is employed to
provide fast transient response and easy loop stabilization. At the beginning of each cycle, the high-side MOSFET is turned on. This MOSFET is
turned off after internal one shot timer expires. This one shot is set by the converter input voltage (VIN), and the output voltage (VOUT) to maintain a
pseudo-fixed frequency over the input voltage range, hence it is called adaptive on-time control. The output voltage variation is sensed by
FB voltage. The one-shot timer is reset and the high-side MOSFET is turned on again when FB voltage falls below the 0.76V.
AP65455 uses an adaptive on-time control scheme and does not have a dedicated in-board oscillator. It runs with a pseudo-constant frequency of
650kHz by using the input voltage and output voltage to set the on-time one-shot timer. The on-time is inversely proportional to the input voltage
and proportional to the output voltage. It can be calculated using the following equation:
V
TON  OUT
VIN  f
VOUT is the output voltage
VIN is the input voltage
f is the switching frequency
After an ON-time period, the AP65455 goes into the OFF-time period. The OFF-time period length depends on VFB in most cases. It will end
when the FB voltage decreases below 0.76V, then the ON-time period is triggered. If the OFF-time period is less than the minimum OFF time, the
minimum OFF time will be applied, which is about 260ns typical.
Power Save Mode
The AP65455 is designed with Power Save Mode (PSM) at light load conditions for high efficiency. The AP65455 automatically reduces the
switching frequency and changes the Ton time to Tmin-on time during a light load condition to get high efficiency and low output ripple. As the
output current decreases from heavy-load condition, the inductor current decreases as well, and eventually comes close to zero current, which is
the boundary between CCM and DCM. The low-side MOSFET is turned off when the inductor current reaches zero level. The load is provided only
by output capacitor, when FB voltage is lower than 0.76V, the next ON cycle begins. The on-time is the minimum on-time that benefits for
decreasing VOUT ripple at light load conditions. When the output current increases from light to heavy load, the switching frequency increases to
keep the output voltage. The transition point to light load operation can be calculated using the following equation:
V V
ILOAD  IN OUT  TON
2L
TON is on-time
Enable
Above the ‘EN high-level input voltage’, the internal regulator is turned on and the quiescent current can be measured above this threshold. The
enable (EN) input allows the user to control turning on or off the regulator. To enable the AP65455, EN must be pulled above the ‘EN high-level
input voltage.’ To disable the AP65455, EN must be pulled below ‘EN low-level input voltage.’
In Figure 3, EN is a high-voltage input that can be safely connected to V IN (up to 18V) directly or through a 100KΩ pull-up to VIN for automatic
start-up.
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AP65455
Application Information (continued)
Soft-Start
The soft-start time of the AP65455 is programmable by selecting different CSS values. When the EN pin becomes high, the CSS is charged by a
6μA current source, generating a ramp signal fed into a non-inverting input of the error comparator. Reference voltage V REF or the internal softstart voltage SS, whichever is smaller, dominates the behavior of the non-inverting inputs of the error amplifier. Accordingly, the output voltage will
follow the SS signal and ramp up smoothly to its target level. The capacitor value required for a given soft-start ramp time can be expressed as:
t SS 
CSS  VFB
ISS
Where CSS is the required capacitor between SS pin and GND, tSS is the desired soft-start time and VFB is the feedback voltage.
Overcurrent Protection (OCP)
Figure 4 shows the overcurrent protection (OCP) scheme of AP65455. In each switching cycle, the inductor current is sensed by monitoring the
low-side MOSFET in the OFF period. When the voltage between GND pin and SW pin is smaller than the overcurrent trip level, the OCP will be
triggered and the controller keeps the OFF state. A new switching cycle will begin when the measured voltage is larger than the limit voltage. The
internal counter is incremented when OCP is triggered. After 16 sequential cycles, the internal OCL (Overcurrent Logic) threshold is set to a lower
level, reducing the available output current. When a switching cycle occurs where the switch current is below the lower OCL threshold, the counter
is reset and OCL limit is returned to higher value.
Because the RDS(ON) of MOSFET increases with temperature, VLimit has xppm/°C temperature coefficient to compensate this temperature
dependency of RDS(ON).
R
S
Q1
Q
-266mV
OC
COMPARATOR
Q2
Figure 4 Overcurrent Protection Scheme
Undervoltage Lockout
The AP65455 provides an under voltage lockout circuit to prevent it from undefined status during startup. The UVLO circuit shuts down the device
when VIN drops below 3.45V. The UVLO circuit has 320mV hysteresis, which means the device starts up again when VREG rises to 3.75V (nonlatch).
PGOOD Comparator
PGOOD is an open-drain output controlled by a comparator connected to the feedback signal. If FB exceeds 90% of the internal reference
voltage, PGOOD will be high impedance. Otherwise, the PGOOD output is connected to PGND.
Thermal shutdown
If the junction temperature of the device reaches the thermal shutdown limit of +160°C, the AP65455 shuts itself off, and both HMOS and LMOS
will be turned off. The output is discharged with the internal transistor. When the junction cools to the required level (+130°C nominal), the device
initiates soft-start as during a normal power-up cycle.
Setting the Output Voltage
The output voltage can be adjusted from 1.000 to 5V using an external resistor divider. Table 1 shows a list of resistor selection for common
output voltages. Resistor R1 is selected based on a design tradeoff between efficiency and output voltage accuracy. For high values of R1 there is
less current consumption in the feedback network. However the tradeoff is output voltage accuracy due to the bias current in the error amplifier.
R1 can be determined by the following equation:
V

R1  R2   OUT  1
 0.765

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AP65455
Application Information (cont.)
Output Voltage (V)
R1 (kΩ)
R3 (kΩ)
Figure 5 Feedback Divider Network
1
6.81
22.1
1.05
8.25
22.1
1.2
12.7
22.1
1.5
21.5
22.1
1.8
30.1
22.1
2.5
49.9
22.1
3.3
73.2
22.1
5
124
22.1
Table 1 Resistor Selection for Common Output
Voltages
Calculating the inductor value is a critical factor in designing a buck converter. For most designs, the following equation can be used to calculate
the inductor value:
Inductor
L
VOUT  (VIN  VOUT )
VIN  ΔIL  fSW
Where ΔIL is the inductor ripple current and fSW is the buck converter switching frequency.
Choose the inductor ripple current to be 30% of the maximum load current. The maximum inductor peak current is calculated from:
IL(MAX)  ILOAD 
ΔIL
2
Peak current determines the required saturation current rating, which influences the size of the inductor. Saturating the inductor decreases the
converter efficiency while increasing the temperatures of the inductor and the internal MOSFETs. Hence choosing an inductor with appropriate
saturation current rating is important.
A 1µH to 3.3µH inductor with a DC current rating of at least 25% higher than the maximum load current is recommended for most applications. For
highest efficiency, the inductor’s DC resistance should be less than 100mΩ. Use a larger inductance for improved efficiency under light load
conditions.
The phase boost can be achieved by adding an additional feed forward capacitor (C10) in parallel with R1.
Output Voltage (V)
1
1.05
1.2
1.5
1.8
2.5
3.3
5
C10(pF)
—
—
—
—
5-22
5-22
5-22
5-22
L1(µH)
1.0-1.5
1.0-1.5
1.0-1.5
1.5
1.5
2.2
2.2
3.3
C8+C9(µF)
22-68
22-68
22-68
22-68
22-68
22-68
22-68
22-68
Table 2 Recommended Component Selection
Input Capacitor
The input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. The input capacitor has to
sustain the ripple current produced during the on-time on the upper MOSFET. It must have a low ESR to minimize the losses.
The RMS current rating of the input capacitor is a critical parameter that must be higher than the RMS input current. As a rule of thumb, select an
input capacitor which has RMs rating greater than half of the maximum load current.
Due to large dI/dt through the input capacitors, electrolytic or ceramics should be used. If a tantalum must be used it must be surge protected,
otherwise, capacitor failure could occur. For most applications greater than 10µF, ceramic capacitor is sufficient.
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AP65455
Application Information (cont.)
Output Capacitor
The output capacitor keeps the output voltage ripple small, ensures feedback loop stability and reduces the overshoot of the output voltage. The
output capacitor is a basic component for the fast response of the power supply. In fact, during load transient, for the first few microseconds, it
supplies the current to the load. The converter recognizes the load transient and sets the duty cycle to maximum, but the current slope is limited
by the inductor value.
Maximum capacitance required can be calculated from the following equation:
ESR of the output capacitor dominates the output voltage ripple. The amount of ripple can be calculated from the equation below:
Vout capacitor  ΔIinductor * ESR
An output capacitor with ample capacitance and low ESR is the best option. For most applications, a 22µF to 68µF ceramic capacitor will be
sufficient.
ΔIinductor 2
)
2
Co 
(Δ V  Vout )2  Vout2
L(Iout 
Where ΔV is the maximum output voltage overshoot.
Bootstrap Capacitor
To ensure the proper operation, a ceramic capacitor must be connected between the VBST and SW pin. A 0.1µF ceramic capacitor is sufficient.
External Bootstrap Diode
It is recommended to add an external bootstrap diode between an external 5V and the BS pin for efficiency improvement when input voltage is
lower than 5.5V. The bootstrap diode can be a low cost one such as 1N4148 or BAT54. The external 5V can be a 5V fixed input from system or a
5V output of the AP65453. Note that the external bootstrap voltage must be lower than 5.5V.
Figure 6 External Bootstrap Diode
VREG5 Capacitor
To ensure the proper operation, a ceramic capacitor must be connected between the VREG5 and GND pin. A 1µF ceramic capacitor is sufficient.
PC Board Layout
1.
2.
3.
4.
5.
6.
The AP65455 works at a 4A load current, heat dissipation is a major concern in layout of the PCB. A 2oz Copper in both top and bottom
layer is recommended.
Provide sufficient vias in the thermal exposed pad for heat dissipate to the bottom layer.
Provide sufficient vias in the Output capacitor GND side to dissipate heat to the bottom layer.
Make the bottom layer under the device as GND layer for heat dissipation. The GND layer should be as large as possible to provide a
better thermal effect.
Make the Vin capacitors as close to the device as possible. Make the VREG5 capacitor as close to the device as possible.
The thermal pad of the device should be soldered directly to the PCB exposed copper plane to work as a heatsink. The thermal vias in
the exposed copper plane increase the heat transfer to the bottom layer.
Figure 7 PC Board Layout
AP65455
Document number: DS37994 Rev. 1 - 2
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© Diodes Incorporated
AP65455
Ordering Information
AP65455 XX - 7
Package
Packing
FN : U-DFN3030-10
7 : Tape & Reel
Part Number
Package Code
Package
Identification Code
AP65455FN-7
FN
U-DFN3030-10
TK
Quantity
Tape and Reel
Part Number Suffix
3,000/Tape & Reel
-7
Marking Information
U-DFN3030-10
( Top View )
XX
Y WX
Part Number
AP65455FN-7
XX : Identification Code
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : Internal Code
Package
U-DFN3030-10
Identification Code
TK
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
U-DFN3030-10
A3
A
SEATING PLANE
A1
D
D2
Pin#1 ID
E E2
L
z
e
AP65455
Document number: DS37994 Rev. 1 - 2
U-DFN3030-10
Dim Min Max Typ
A
0.57 0.63 0.60
A1
0
0.05 0.02
A3

 0.15
b
0.20 0.30 0.25
D
2.90 3.10 3.00
D2 2.30 2.50 2.40
e

 0.50
E
2.90 3.10 3.00
E2 1.50 1.70 1.60
L
0.25 0.55 0.40
z

 0.375
All Dimensions in mm
b
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Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
U-DFN3030-10
Y
C
Dimensions Value (in mm)
Z
2.60
G
0.15
X
1.80
X1
0.60
Y
0.30
C
0.50
X1
G
X
G
Z
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Copyright © 2015, Diodes Incorporated
www.diodes.com
AP65455
Document number: DS37994 Rev. 1 - 2
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August 2015
© Diodes Incorporated