MP28373DN-LF [MPS]
Switching Regulator, Current-mode, 6.5A, 1400kHz Switching Freq-Max, PDSO8, ROHS COMPLIANT, MS-012BA, SOIC-8;
| 型号： | MP28373DN-LF |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Switching Regulator, Current-mode, 6.5A, 1400kHz Switching Freq-Max, PDSO8, ROHS COMPLIANT, MS-012BA, SOIC-8 开关 光电二极管 |
| 文件： | 总11页 (文件大小：366K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP28373
3A, 28V, 1.4MHz
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP28373 is a 1.4MHz step-down regulator
with a built-in power MOSFET. It achieves 3A
continuous output current over a wide input
supply range with excellent load and line
regulation.
•
3A Continuous Output Current, 4A Peak
Output Current
Programmable Soft-Start
100mΩ Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 91% Efficiency
20μA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
•
•
•
Current mode operation provides fast transient
response and eases loop stabilization.
•
•
•
•
•
•
•
•
Fault condition protection includes cycle-by-
cycle current limiting and thermal shutdown.
Adjustable soft-start reduces the stress on the
input source at turn-on. In shutdown mode, the
regulator draws 20μA of supply current.
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 28V Operating Input Range
Output is Adjustable From 0.92V to 21V
Under Voltage Lockout
The MP28373 is available in an 8-pin SOIC
package with an exposed pad, and requires a
minimum number of readily available external
components to complete a 3A step-down DC to
DC converter solution.
APPLICATIONS
•
•
•
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
EVALUATION BOARD REFERENCE
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
Board Number
Dimensions
EV28373DN-00A
2.0” x 1.9” x 0.4”
TYPICAL APPLICATION
Efficiency Curve
INPUT
100
C5
1
2
V
=5V
IN
BS
L1
OUTPUT
3.3V
OUT
7
3
5
OPEN =
EN
SW
90
80
70
60
AUTOMATIC
3A
MP28373
STARTUP
8
SS
GND
FB
V
=3.3V
C1
CERAMIC
OUT
COMP
R1
4
6
D1
C2
CERAMIC
C3
R3
R2
C6
OPEN
C4
V
=12V
IN
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP28373 Rev. 1.0
12/12/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
1
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN.......................–0.3V to +30V
Switch Voltage VSW.............. –0.5V to VIN + 0.3V
Boost Voltage VBS..........VSW – 0.3V to VSW + 6V
All Other Pins.................................–0.3V to +6V
Junction Temperature...............................150°C
Lead Temperature....................................260°C
Storage Temperature .............–65°C to +150°C
Recommended Operating Conditions (2)
Input Voltage VIN............................ 4.75V to 28V
Ambient Operating Temp ..........–40°C to +85°C
TOP VIEW
BS
IN
1
2
3
4
8
7
6
5
SS
EN
SW
GND
COMP
FB
EXPOSED PAD
CONNECT TO PIN 4
Thermal Resistance (3)
θJA
θJC
SOIC8N ..................................50...... 10... °C/W
Part Number*
MP28373DN
Package
Temperature
SOIC8N
–40°C to +85°C
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
For Tape & Reel, add suffix –Z (eg. MP28373DN–Z)
For RoHS compliant packaging, add suffix –LF
(eg. MP28373DN–LF–Z)
*
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ Max Units
Shutdown Supply Current
Supply Current
VEN = 0V
20
30
µA
VEN = 3V, VFB =1.4V
1.3
1.5
mA
4.75V ≤ VIN ≤ 28V,
VCOMP < 2V
Feedback Voltage
VFB
0.901 0.920 0.939
V
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-Side Switch-On Resistance
Low-Side Switch-On Resistance
High-Side Switch Leakage Current
Short Circuit Current Limit
AVEA
GEA
400
V/V
330
530
100
10
730 µA/V
ΔICOMP = ±10μA
RDS(ON)1
RDS(ON)2
mΩ
Ω
VEN = 0V, VSW = 0V
0.1
6.5
6.0
1.4
180
65
10
µA
A
Current Sense to COMP Transconductance
Oscillation Frequency
GCS
fS
A/V
MHz
KHz
%
Short Circuit Oscillation Frequency
Maximum Duty Cycle
VFB = 0V
DMAX
TON
VFB = 0.8V
Minimum On Time
130
1.2
1.6
2.6
210
10
ns
EN Threshold Voltage
0.9
0.9
2.3
1.5
2.3
2.9
V
Enable Pull Up Current
VEN = 0V
µA
V
Under Voltage Lockout Threshold Rising
Under Voltage Lockout Threshold Hysteresis
Soft-Start Period
mV
ms
°C
CSS = 0.1µF
Thermal Shutdown
160
MP28373 Rev. 1.0
12/12/2007
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© 2007 MPS. All Rights Reserved.
2
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
PIN FUNCTIONS
Pin # Name Description
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 10nF or greater capacitor from SW to BS to power the high side switch.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
Drive IN with a 4.75V to 28V power source. Bypass IN to GND with a suitably large capacitor
to eliminate noise on the input to the IC. See Input Capacitor
1
2
BS
IN
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.
3
4
5
SW
GND Ground. Connect the exposed pad on backside to Pin 4.
Feedback Input. FB senses the output voltage to regulate said voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.92V. See Setting
FB
the Output Voltage
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
6
COMP series RC network from COMP to GND to compensate the regulation control loop. In some
cases, an additional capacitor from COMP to GND is required. See Compensation
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN higher than 2.9V
7
8
EN
SS
to turn on the regulator, lower than 0.9V to turn it off. For automatic startup, leave EN
unconnected.
Soft-Start Control Input. SS controls the soft start period. Connect a capacitor from SS to GND
to set the soft-start period. A 0.1μF capacitor sets the soft-start period to 10ms.
ELECTRICAL CHARACTERISTICS
VIN = 12V, C1 = 10µF, C2 = 47µF, L = 4.7µH and TA = +25°C, unless otherwise noted.
Efficiency vs
Load Current
Feedback Voltage vs
Die Temperature
Peak Current vs
Duty Cycle
90
80
70
60
50
40
30
0.95
0.94
0.93
0.92
0.91
0.90
0.89
8.0
7.5
7.0
6.5
6.0
5.5
5.0
V
= 5V
OUT
V
OUT
= 2.5V
V
= 24V
IN
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
-40 -20
0
20 40 60 80 100 120
0
20
40
60
80
TEMPERATURE (OC)
DUTY CYCLE (%)
MP28373 Rev. 1.0
12/12/2007
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3
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, C1 = 10µF, C2 = 47µF, L = 4.7µH and TA = +25°C, unless otherwise noted.
Steady State Operation Steady State Operation
V
= 1.8V, I
OUT
= 1.5A
V
= 1.8V, I = 3A
OUT
OUT
OUT
V
V
V
OUT
OUT
OUT
AC Coupled
50mV/div.
AC Coupled
20mV/div.
AC Coupled
20mV/div.
V
V
SW
SW
10V/div.
10V/div.
I
INDUCTOR
1A/div.
I
I
I
INDUCTOR
2A/div.
INDUCTOR
2A/div.
LOAD
1A/div.
400ns/div.
400ns/div.
Shutdown Through Enable
Startup Through Enable
Startup Through Enable
V
I
= 3.3V,
V
I
= 3.3V,
V
I
= 3.3V,
OUT
= 1.5A (Resistance Load)
OUT
= 3A (Resistance Load)
OUT
= 1.5A (Resistance Load)
OUT
OUT
OUT
V
V
V
EN
EN
EN
5V/div.
5V/div.
5V/div.
V
OUT
V
V
OUT
OUT
1V/div.
1V/div.
1V/div.
V
V
V
SW
SW
SW
10V/div.
10V/div.
10V/div.
I
I
I
INDUCTOR
2A/div.
INDUCTOR
2A/div.
INDUCTOR
2A/div.
4ms/div.
4ms/div.
Shutdown Through Enable
V
= 3.3V,
OUT
= 3A (Resistance Load)
I
OUT
V
EN
5V/div.
V
OUT
1V/div.
V
SW
10V/div.
I
INDUCTOR
2A/div.
MP28373 Rev. 1.0
12/12/2007
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4
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
OPERATION
The MP28373 is a current-mode step-down
regulator. It regulates input voltages from 4.75V to
28V down to an output voltage as low as 0.92V,
and is able to supply up to 3A of load current.
The converter uses an internal N-Channel
MOSFET switch to step-down the input voltage
to the regulated output voltage. Since the
MOSFET requires a gate voltage greater than
the input voltage, a boost capacitor connected
between SW and BS drives the gate. The
capacitor is internally charged while SW is low.
The MP28373 uses current-mode control to
regulate the output voltage. The output voltage
is measured at FB through a resistive voltage
divider and amplified through the internal error
An internal 10ꢀ switch from SW to GND is used
to insure that SW is pulled to GND when SW is
low to fully charge the BS.capacitor.
amplifier.
The
output
current
of
the
transconductance error amplifier is presented at
COMP where a network compensates the
regulation control system. The voltage at COMP
is compared to the switch current measured
internally to control the output voltage.
2
IN
CURRENT
SENSE
AMPLIFIER
INTERNAL
REGULATORS
+
--
5V
OSCILLATOR
SLOPE
COMP
180KHz/
1.4MHz
1
3
BS
CLK
+
--
+
S
R
Q
Q
SW
CURRENT
COMPARATOR
SHUTDOWN
COMPARATOR
--
1.2V
7
EN
LOCKOUT
COMPARATOR
--
+
2.60V/
2.39V
+
--
+
4
GND
1.8V
0.6V
0.92V
--
FREQUENCY
FOLDBACK
COMPARATOR
ERROR
AMPLIFIER
5
6
8
SS
FB
COMP
Figure 1—Functional Block Diagram
MP28373 Rev. 1.0
12/12/2007
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5
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
APPLICATION INFORMATION
Choose an inductor that will not saturate under
the maximum inductor peak current. The peak
inductor current can be calculated by:
COMPONENT SELECTION
(Refer to Figure 3)
Setting the Output Voltage
⎛
⎜
⎝
⎞
⎟
⎟
⎠
The output voltage is set using a resistive
voltage divider from the output voltage to FB pin.
The voltage divider divides the output voltage
down to the feedback voltage by the ratio:
VOUT
VOUT
⎜
ILP = ILOAD
+
× 1−
2 × fS × L
V
IN
Where ILOAD is the load current.
Table 1 lists a number of suitable inductors
from various manufacturers. The choice of
which style inductor to use mainly depends on
the price vs. size requirements and any EMI
requirement.
R2
VFB = V
OUT R1+ R2
Where VFB is the feedback voltage and VOUT is
the output voltage.
Thus the output voltage is:
Table 1—Inductor Selection Guide
R1+ R2
Package
Dimensions
VOUT = 0.92 ×
R2
(mm)
Vendor/
Model
Core
Type
Core
Material
A typical value for R2 can be as high as 100kꢀ,
but a typical value is 10kꢀ. Using that value, R1
is determined by:
W
L
H
Sumida
CR75
Open
Open
Ferrite
Ferrite
7.0 7.8 5.5
7.3 8.0 5.2
5.5 5.7 5.5
5.5 5.7 5.5
6.7 6.7 3.0
R1= 10.87 × (VOUT − 0.92)(kΩ)
CDH74
Inductor
CDRH5D28 Shielded Ferrite
CDRH5D28 Shielded Ferrite
CDRH6D28 Shielded Ferrite
The inductor is required to supply constant
current to the output load while being driven by
the switched input voltage. A larger value
inductor will result in less ripple current that will
result in lower output ripple voltage. However,
the larger value inductor will have a larger
physical size, higher series resistance, and/or
lower saturation current. A good rule for
determining the inductance to use is to allow
the peak-to-peak ripple current in the inductor
to be approximately 30% of the maximum
switch current limit. Also, make sure that the
peak inductor current is below the maximum
switch current limit. The inductance value can
be calculated by:
CDRH104R Shielded Ferrite 10.1 10.0 3.0
Toko
D53LC
Type A
Shielded Ferrite
Shielded Ferrite
5.0 5.0 3.0
7.6 7.6 5.1
D75C
D104C
Shielded Ferrite 10.0 10.0 4.3
D10FL
Open
Ferrite
9.7 1.5 4.0
Coilcraft
DO3308
DO3316
Open
Open
Ferrite
Ferrite
9.4 13.0 3.0
9.4 13.0 5.1
⎛
⎜
⎝
⎞
⎟
⎟
⎠
VOUT
VOUT
⎜
L1=
× 1−
fS × ΔIL
V
IN
Where VIN is the input voltage, fS is the 1.4MHz
switching frequency and ΔIL is the peak-to-peak
inductor ripple current.
MP28373 Rev. 1.0
12/12/2007
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6
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
Output Rectifier Diode
The input capacitor can be electrolytic, tantalum
The output rectifier diode supplies the current to
the inductor when the high-side switch is off. To
reduce losses due to the diode forward voltage
and recovery times, use a Schottky diode.
or ceramic. When using electrolytic or tantalum
capacitors, a small, high quality ceramic
capacitor, i.e. 0.1μF, should be placed as close
to the IC as possible. When using ceramic
capacitors, make sure that they have enough
capacitance to provide sufficient charge to
prevent excessive voltage ripple at input. The
input voltage ripple caused by capacitance can
be estimated by:
Choose a diode whose maximum reverse
voltage rating is greater than the maximum
input voltage, and whose current rating is
greater than the maximum load current. Table 2
lists
example
Schottky
diodes
and
manufacturers.
⎛
⎜
⎝
⎞
⎟
⎟
⎠
ILOAD
VOUT
VIN
VOUT
⎜
ΔV
=
×
× 1−
IN
fS × C1
V
IN
Table 2—Diode Selection Guide
Voltage/Current Manufacture
Output Capacitor
Diode
Rating
30V, 3A
40V, 3A
30V, 3A
40V, 3A
30V, 3A
40V, 3A
The output capacitor (C2) is required to
maintain the DC output voltage. Ceramic,
tantalum, or low ESR electrolytic capacitors are
recommended. Low ESR capacitors are
preferred to keep the output voltage ripple low.
The output voltage ripple can be estimated by:
SK33
SK34
Diodes Inc.
Diodes Inc.
Diodes Inc.
Diodes Inc.
B330
B340
MBRS330
MBRS340
On Semiconductor
On Semiconductor
⎛
⎞
⎟
⎟
⎛
⎞
⎟
⎟
⎠
VOUT
VOUT
VIN
1
⎜
⎜
ΔVOUT
=
× 1−
× RESR
+
⎜
⎝
⎜
⎝
fS × L
8 × fS × C2
⎠
Input Capacitor
The input current to the step-down converter is
discontinuous, therefore a capacitor is required
to supply the AC current to the step-down
converter while maintaining the DC input
voltage. Use low ESR capacitors for the best
performance. Ceramic capacitors are preferred,
but tantalum or low-ESR electrolytic capacitors
may also suffice.
Where L is the inductor value and RESR is the
equivalent series resistance (ESR) value of the
output capacitor.
In the case of ceramic capacitors, the
impedance at the switching frequency is
dominated by the capacitance. The output
voltage ripple is mainly caused by the
capacitance. For simplification, the output
voltage ripple can be estimated by:
Since the input capacitor (C1) absorbs the input
switching current, it requires an adequate ripple
current rating. The RMS current in the input
capacitor can be estimated by:
⎛
⎜
⎝
⎞
⎟
⎟
⎠
VOUT
8 × fS2 × L × C2
VOUT
⎜
ΔVOUT
=
× 1−
V
IN
⎛
⎞
⎟
VOUT
VIN
VOUT
VIN
In the case of tantalum or electrolytic capacitors,
the ESR dominates the impedance at the
switching frequency. For simplification, the
output ripple can be approximated to:
⎜
IC1 = ILOAD
×
× 1−
⎜
⎝
⎟
⎠
The worst-case condition occurs at VIN = 2VOUT
,
where:
VOUT
VOUT
⎛
⎞
ΔVOUT
=
× ⎜1−
⎟ ×RESR
ILOAD
⎜
⎟
fS ×L
VIN
IC1
=
⎝
⎠
2
The characteristics of the output capacitor also
affect the stability of the regulation system. The
MP28373 can be optimized for a wide range of
capacitance and ESR values.
For simplification, choose the input capacitor
whose RMS current rating greater than half of
the maximum load current.
MP28373 Rev. 1.0
12/12/2007
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7
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
Compensation Components
In this case, a third pole set by the compensation
MP28373 employs current mode control for
easy compensation and fast transient response.
The system stability and transient response are
controlled through the COMP pin. COMP pin is
the output of the internal transconductance
error amplifier. A series capacitor-resistor
combination sets a pole-zero combination to
control the characteristics of the control system.
capacitor (C6) and the compensation resistor (R3)
is used to compensate the effect of the ESR zero
on the loop gain. This pole is located at:
1
fP3
=
2π × C6 × R3
The goal of compensation design is to shape
the converter transfer function to get a desired
loop gain. The system crossover frequency
where the feedback loop has the unity gain is
important.
The DC gain of the voltage feedback loop is
given by:
VFB
AVDC = RLOAD × GCS × AVEA
×
Lower crossover frequencies result in slower
line and load transient responses, while higher
crossover frequencies could cause system
unstable. A good rule of thumb is to set the
crossover frequency to approximately one-tenth
of the switching frequency or lower. The
switching frequency for the MP28373 is 1.4MHz,
so the desired crossover frequency is equal to
or less than 140KHz.
VOUT
Where AVEA is the error amplifier voltage gain, GCS
is the current sense transconductance and RLOAD
is the load resistor value.
The system has two poles of importance. One is
due to the compensation capacitor (C3) and the
output resistor of error amplifier, and the other is
due to the output capacitor and the load resistor.
These poles are located at:
Table 3 lists the typical values of compensation
components for some standard output voltages
with various output capacitors and inductors.
The values of the compensation components
have been optimized for fast transient
responses and good stability at given conditions.
GEA
fP1
=
2π× C3× AVEA
1
fP2
=
2π × C2× RLOAD
Table 3—Compensation Values for Typical
Output Voltage/Capacitor Combinations
Where GEA is the error amplifier transconductance,
530μA/V.
VOUT
(V)
C2 (µF,
Ceramic)
R3
(kΩ)
C3
(nF)
L (µH)
C6
The system has one zero of importance, due to
the compensation capacitor (C3) and the
compensation resistor (R3). This zero is located
at:
1.8
2.5
3.3
5
2.2
47
47
7.5
10
3.3 None
4.7 None
5.6 None
4.7 None
2.2 None
2.2 - 4.7
2.2 - 4.7
4.7 – 6.8
6.8 - 10
47
15
2 x 22
2 x 22
20
1
fZ1
=
12
44.2
2π × C3×R3
The system may have another zero of importance,
if the output capacitor has a large capacitance
and/or a high ESR value. The zero, due to the
ESR and capacitance of the output capacitor, is
located at:
1
fESR
=
2π × C2× RESR
MP28373 Rev. 1.0
12/12/2007
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8
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
To optimize the compensation components for
conditions not listed in Table 3, the following
procedure can be used.
If this is the case, then add the second
compensation capacitor (C6) to set the pole fP3
at the location of the ESR zero. Determine the
C6 value by the equation:
1. Choose the compensation resistor (R3) to set
the desired crossover frequency. Determine the
R3 value by the following equation:
C2 × RESR
C6 =
R3
2π × C2× fC VOUT
External Bootstrap Diode
R3 =
×
GEA × GCS
VFB
It is recommended that an external bootstrap
diode be added when the system has a 5V
fixed input or the power supply generates a 5V
output. This helps improve the efficiency of the
regulator. The bootstrap diode can be a low
cost one such as IN4148 or BAT54.
Where fC is the desired crossover frequency.
2. Choose the compensation capacitor (C3) to
achieve the desired phase margin. For
applications with typical inductor values, setting
the compensation zero, fZ1, below one forth of the
crossover frequency provides sufficient phase
margin. Determine the C3 value by the following
equation:
5V
BS
10nF
MP28373
4
C3 >
SW
2π × R3 × fC
3. Determine if the second compensation
capacitor (C6) is required. It is required if the ESR
zero of the output capacitor is located at less than
half of the 1.4MHz switching frequency, or the
following relationship is valid:
Figure 2—External Bootstrap Diode
This diode is also recommended for high duty
VOUT
cycle operation (when
>65%) and high
VIN
output voltage (VOUT>12V) applications.
fS
2
1
<
2π × C2× RESR
MP28373 Rev. 1.0
12/12/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
9
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
TYPICAL APPLICATION CIRCUITS
C5
10nF
INPUT
4.75V to 28V
2
1
IN
EN
BS
SW
OUTPUT
2.5V
3A
7
8
3
5
OPEN = AUTOMATIC
STARTUP
MP28373
SS
FB
GND
COMP
4
6
C3
4.7nF
D1
B330A
C6
OPEN
Figure 3—2.5V Output Typical Application Schematic
C5
10nF
INPUT
4.75V to 28V
2
1
IN
EN
BS
SW
OUTPUT
3.3V
3A
7
8
3
5
OPEN = AUTOMATIC
STARTUP
MP28373
SS
FB
GND
COMP
4
6
C3
5.6nF
D1
B330A
C6
OPEN
Figure 4—3.3V Output Typical Application Schematic
MP28373 Rev. 1.0
12/12/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
10
MP28373 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
PACKAGE INFORMATION
SOIC8N (EXPOSED PAD)
0.189(4.80)
0.197(5.00)
0.124(3.15)
0.136(3.45)
8
5
0.150(3.80)
0.157(4.00)
0.228(5.80)
0.244(6.20)
0.089(2.26)
0.101(2.56)
PIN 1 ID
1
4
TOP VIEW
BOTTOM VIEW
SEE DETAIL "A"
0.051(1.30)
0.067(1.70)
SEATING PLANE
0.000(0.00)
0.006(0.15)
0.0075(0.19)
0.0098(0.25)
0.013(0.33)
0.020(0.51)
SIDE VIEW
0.050(1.27)
BSC
FRONT VIEW
0.010(0.25)
0.020(0.50)
x 45o
GAUGE PLANE
0.010(0.25) BSC
0.024(0.61)
0.063(1.60)
0.050(1.27)
0.016(0.41)
0.050(1.27)
0o-8o
DETAIL"A"
0.103(2.62)
0.213(5.40)
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
0.138(3.51)
4) LEAD COPLANARITY(BOTTOM OF LEADS AFTER FORMING)
SHALL BE0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION BA.
6) DRAWING IS NOT TO SCALE.
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP28373 Rev. 1.0
12/12/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
11
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