M1583 [MITSUBISHI]
3A 380KHZ 28V PWM Buck DC/DC Converter,三菱科技高效率DC TO DC; 3A 380KHZ 28V PWM降压型DC / DC转换器，三菱科技高效率的DC TO DC
| 型号： | M1583 |
| 厂家： | 
Mitsubishi Group |
| 描述： | 3A 380KHZ 28V PWM Buck DC/DC Converter,三菱科技高效率DC TO DC |
| 文件： | 总10页 (文件大小：342K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
General Description
Features
The M1583 is a 380 KHz fixed frequency ꢀ 3A Constant Output Current
monolithic step down switch mode regulator ꢀ 140mΩ RDSON Internal Power PMOSFET
with a built in internal Power MOSFET. It Switch
achieves 3A continuous output current over a ꢀ Up to 95% Efficiency
wide input supply range with excellent load ꢀ Fixed 380KHz Frequency
and line regulation.
ꢀ Wide 3.6V to 28V Input Voltage Range
The device includes a voltage reference, ꢀ Output Adjustable from 1.235V to 26V
oscillation circuit, error amplifier, internal ꢀ Built in Frequency Compensation
PMOS and etc.
ꢀ
ꢀ
Built in Thermal Shutdown Function
Built in Current Limit Function
The PWM control circuit is able to adjust the ꢀ SOIC-8 Package is Available
duty ratio linearly from 0 to 100%. An enable ꢀ The minimum dropout up to 0.3V
function, an over current protection function
and a short circuit protection function are
Applications
built inside. An internal compensation block
is built in to minimize external component
count.
ꢀ Portable DVD
ꢀ LCD Monitor / TV
ꢀ Battery Charger
ꢀ ADSL Modem
The M1583 serves as ideal power supply
units for portable devices.
ꢀ Telecom / Networking Equipment
Figure 1 Package Type of M1583
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Pin Configurations
Figure 2 Pin Configuration of M1583 (Top View)
Pin Description
Pin Number Pin Name Description
1,6, 8
NC
Not Connect.
Supply Voltage Input Pin. M1583 operates from a 3.6V to 28V
DC voltage. Bypass Vin to GND with a suitably large capacitor
to eliminate noise on the input.
2
Vin
Power Switch Output Pin. SW is the switch node that supplies
power to the output.
Ground Pin. Care must be taken in layout. This pin should be
placed outside of the Schottky Diode to output capacitor ground
path to prevent switching current spikes from inducing voltage
noise into M1583.
3
4
SW
GND
Feedback Pin. Through an external resistor divider network, FB
senses the output voltage and regulates it. The feedback
threshold voltage is 1.235V.
Enable Pin. EN is a digital input that turns the regulator on or
off.Drive EN pin high to turn on the device, drive it low to turn
it off.
5
7
FB
EN
Ordering Information
X
M1583
X
Packing
Blank: Tube
Circuit Type
R:
Type and Reel
Package
S: SOP8
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Function Block
Figure 3 Function Block Diagram of M1583
Absolute Maximum Ratings
Parameter
Symbol
VIN
Value
-0.3 to 28
-0.3 to Vin
-0.3 to 12
-0.3 to Vin
Internally limited
150
Unit
V
Input Voltage
Feedback Pin Voltage
Enable Pin Voltage
V
VFB
V
VEN
VSW
PD
Switch Pin Voltage
V
Power Dissipation
mW
ºC
ºC
ºC
V
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
ESD (HBM)
TJ
-65 to 150
260
TSTG
TLEAD
2000
Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage
to the device. This is a stress rating only and functional operation of the device at these or any
other conditions above those indicated in the operation is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect reliability.
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Recommended Operating Conditions
Parameter
Symbol
VIN
Min.
3.6
Max.
28
Unit
V
Input Voltage
Operating Junction Temperature
Operating Ambient Temperature
TJ
-40
125
85
ºC
TA
-40
ºC
Electrical Characteristics
VCC = 12V, Ta = 25℃ unless otherwise specified.
Parameters
Input voltage
Symbol
VIN
Test Condition
Min. Typ. Max. Unit
3.6
28
90
4
V
uA
mA
V
Shutdown Supply Current
Supply Current
ISTBY
VEN=0V
30
ICC
VFB
IFB
VEN=2V, VFB=1.3V
VIN = 3.6V to 23V
VFB=1.3V
3.6
Feedback Voltage
1.21 1.235 1.26
Feedback Bias Current
Switch Current Limit
0.1
4
0.5
5
uA
A
ILIM
Oscillator Frequency
FOSC
FOSC1
VEN
320
0.7
380
42
440 KHz
KHz
Frequency of Current
Limit or Short Circuit
Protection
VFB=0V
EN Pin Threshold
1.2
1.7
V
IH
IL
VEN=2.5V
VEN=0.5V
-0.1
-3
-1
uA
uA
EN Pin Input Leakage
Current
-10
VIN =12V, VFB=0V
VEN=12V, Iout=3A
Internal PMOS RDSON
Max. Duty Cycle
RDSON
DMAX
80
mΩ
VFB=0V, ISW=0.1A
100
%
VIN=12V ,Vout=5V
Iout=3A
Efficiency
η
-
92
-
%
Thermal Shutdown
TOTSD
165
ºC
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Typical Performance Characteristics
Figure 5. Vfb vs. Temperature
Figure 4. Switching Frequency vs. Temperature
Figure 6. Icc vs. Temperature
Figure 7. Efficiency vs. Load (Vin=10V)
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Typical Application Circuit
5V3A
M1583
5.5V~28V
DC INPUT
Fig8. M1583 Typical Application Circuit @ 5V/3A
3.3V3A
M1583
4.5V~28V
DC INPUT
Fig9. M1583 Typical Application Circuit @ 3.3V/3A
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
5V3A
M1583
5.5V~28V
DC INPUT
Fig10. M1583 Typical Application Circuit (with ceramic output capacitor) @ 5V/3A
3.3V3A
M1583
4.5V~28V
DC INPUT
Fig11. M1583 Typical Application Circuit (with ceramic output capacitor) @ 3.3V/3A
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Schottky Rectifier Selection Guide
Vin (Max)
3A Load Current
Part Number
B220
3A Load Current
Part Number
B320
Vendor
Vendor
1
1
20V
SK23
6
SK33
1,6
3
SR22
6
SS32
20BQ030
B230
4
B330
1
1
B340L
1
30V
SK23
6
MBRD330
SK33
4,5
1,6
2,3
SR23
3,6
2,3
SS23
SS33
Table 1 lists some rectifier manufacturers.
No.
1
Vendor
Web Site
Diodes, Inc.
www.diodes.com
2
Fairchild Semiconductor
General Semiconductor
International Rectifier
On Semiconductor
Pan Jit International
www.fairchildsemi.com
www.gensemi.com
www.irf.com
3
4
5
www.onsemi.com
www.panjit.com.tw
6
Table 2 Schottky Diode manufacturers.
Output Voltage VS R1, R2 Resistor Selection Guide
Vout = (1+R1/R2)*1.235V
R2
11K
5K
Vout
1.8V
2.5V
3.3V
5V
R1
5.1K
5.1K
2.7K
11K
43K
13K
1.6K
3.6K
6.8K
1.5K
9V
12V
Table 3. Vout VS. R1, R2 Select Table
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
package) operating as a buck-switching regulator
in an ambient temperature of 25oC (still air).
These temperature rise numbers are all
approximate and there are many factors that can
affect these temperatures. Higher ambient
temperatures require more heat sinking.
Function Description
Pin Functions
VIN
This is the positive input supply for the IC
switching regulator. A suitable input bypass
capacitor must be present at this pin to minimize
voltage transients and to supply the switching
currents needed by the regulator
For the best thermal performance, wide copper
traces and generous amounts of printed circuit
board copper should be used in the board layout.
(Once exception to this is the output (switch) pin,
which should not have large areas of copper.)
Large areas of copper provide the best transfer of
heat (lower thermal resistance) to the surrounding
air, and moving air lowers the thermal resistance
even further.
Gnd
Circuit ground.
SW
Internal switch. The voltage at this pin switches
between (VIN – VGS) and approximately – 0.5V,
with a duty cycle of approximately VOUT / VIN. To
minimize coupling to sensitive circuitry, the PC
board copper area connected to this pin should
be kept a minimum.
Package thermal resistance and junction
temperature rise numbers are all approximate,
and there are many factors that will affect these
numbers. Some of these factors include board
size, shape, thickness, position, location, and
even board temperature. Other factors are, trace
width, total printed circuit copper area, copper
thickness, single or double-sided, multi-layer
board and the amount of solder on the board.
FB
Senses the regulated output voltage to complete
the feedback loop.
EN
The effectiveness of the PC board to dissipate
heat also depends on the size, quantity and
spacing of other components on the board, as
well as whether the surrounding air is still or
moving. Furthermore, some of these components
such as the catch diode will add heat to the PC
board and the heat can vary as the input voltage
changes. For the inductor, depending on the
physical size, type of core material and the DC
resistance, it could either act as a heat sink taking
heat away from the board, or it could add heat to
the board.
Allows the switching regulator circuit to be
shutdown using logic level signals thus dropping
the total input supply current to approximately
30uA. Pulling this pin below a threshold voltage of
approximately 1.3V turns the regulator down, and
pulling this pin above 1.3V (up to a maximum of
12V) shuts the regulator on. Forautomatic starup
condition , can be implemented by the addition of
a resistive voltage divider from VIN to GND.
Thermal Considerations
The M1583 is available in SOP8 package.
The SOP8 package needs a heat sink under most
conditions. The size of the heat sink depends on
the input voltage, the output voltage, the load
current and the ambient temperature. The
M1583 junction temperature rises above
ambient temperature for a 3A load and different
input and output voltages. The data for these
curves was taken with the M1583 (SOP8
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Datasheet
M1583
3A 380KHZ 28V PWM Buck DC/DC Converter
Package Information
SOP8 Package Outline Dimensions
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