MA2009C [MPOWER]
1.2MHz 2A, High Voltage, Boost Converte;![MA2009C](http://pdffile.icpdf.com/pdf2/p00332/img/icpdf/MA2009_2044506_icpdf.jpg)
型号: | MA2009C |
厂家: | ![]() |
描述: | 1.2MHz 2A, High Voltage, Boost Converte |
文件: | 总9页 (文件大小:383K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
![](http://public.icpdf.com/style/img/ads.jpg)
MA2009
1.2MHz 2A, High Voltage, Boost Converter
GENERAL DESCRIPTION
The MA2009 is a current mode step up converter intended for small, low power applications.
The converter input voltage ranging from 2.6V to 16V. The Output voltage can be set up to
28V. The frequency is 1.2MHz allows the use of small external inductors and capacitors and
provides fast transient response. Internal soft start results in small inrush current and extends
battery life. Internal power MOSFET with very low RDS (ON) provides high efficiency. The
MA2009 automatically transits from PWM to PFM during light load condition further increasing
efficiency. The converter also provides protection functions such as under-voltage lockout,
current limit and thermal shutdown. The MA2009 is available in 6-pin SOT23 packages.
FEATURES
-
-
-
-
-
-
-
-
-
2.6V to 16V operating input voltage range
1.2MHz Fixed Switching Frequency
Adjustable output voltage range up to 28V
Internal 3A switching current limit
Up to 97% Efficiency
Internal Soft-start Function and compensation
Current limit and Thermal shutdown protection
Under voltage Lockout
Available in the 6-pin SOT23 Packages
APPLICATIONS
-
-
-
-
-
Battery-Powered Equipment
Set-Top Boxed
LCD Bias Supply
PDA, DVD and GPS Receivers
Portable Instruments
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
1/9
MA2009
BLOCK DIAGRAM
VCC
UVLO
and POR
REFERENCE
0.6V
+
SW
EA
-
PWM
CONTROL
LOGIC
COMP
FB
DRIVER
ILIMIT
Enable
+
EN
OSCILLATOR
GND
PIN ASSIGNMENT
The package of MA2009 is SOT23-6L; the pin assignment is given by:
Name
Description
Power Switch Output. SW is the drain of
the internal MOSFET switch. Connect the
power inductor and output rectifier to SW.
SW can swing between GND and 28V.
NC
VIN
Top View
GND
EN
SW
(
)
GND Ground Pin.
Feedback Input. The FB voltage is 0.6V.
FB
Connect a resistor divider to FB.
Regulator On/Off Control Input. A high
input at EN turns on the converter,
Input Supply Pin.
EN
SW
FB
VIN
ORDER/MARKING INFORMATION
Order Information
Top Marking
B 2 Y WX
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
2/9
MA2009
ABSOLUTE MAXIMUM RATINGS (at TA=25°C)
Characteristics Symbol
Rating
Unit
V
VIN,EN pin voltage
SW pin voltage
FB pins voltage
-0.3 to 20
-0.3 to 30
-0.3 to 6
( TJ-TA ) / θJA
-40 to 85
150
VSW
V
V
Continuous Power Dissipation
Operating Temperature
PD
Top
TJ
mW
°C
Junction Temperature
°C
Storage Temperature Range
-65 to 150
110
°C
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
Note: θJA is measured with the PCB copper are (need connect to GND) of approximately 1 in2 (Multi-layer).
θJC
θJA
°C/W
°C/W
250
ELECTRICAL CHARACTERISTICS
(VIN = 5V, VEN = 5V, TA = 25°C)
Characteristics
Input Voltage Range
Input UVLO
Symbol
Conditions
Min Typ Max Units
VIN
2.6
-
16
V
V
V
V
UVLO Rising
-
-
1.7 2.55
UVLO Hysteresis
0.1
-
-
Step-Up Voltage Adjust Range VOUT
3
-
28
Quiescent Current
Shutdown Current
FB Pin Voltage
ICCQ IOUT= 0mA, VFB =0.7V
100 200 μA
ISD VEN = 0V
-
0.1
1
μA
VFB
0.588 0.600 0.612
V
Switching frequency
Maximum Duty
FOSC
800 1200 1500 KHz
DMAX
88
90
4
-
-
%
A
SW current limit(Note 1)
ILIM Duty=50%
3
MOSFET on-resistance(Note 1) RDS(on) VCC=5V, ISW=1A
-
-
80 150 mΩ
SW Leakage Current
ISWL VSW = 28V, VFB =0.7V
-
1
-
µA
V
EN high-level input voltage
EN low-level input voltage
VIH
VIL
1.5
-
-
-
0.4
-
V
Thermal Shutdown
TDS
-
150
°C
Note1: Guaranteed by design, not tested.
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
3/9
MA2009
APPLICATION CIRCUIT
D1
B340A
VIN=5V
L1
4.7uH
VOUT=12V
U1
R3
100K
R1
380K
1
3
5
4
VIN
EN
SW
FB
C1
C2
GND
22uF
22uF
R2
20K
2
OUT
FUNCTION DESCRIPTION
The MA2009 uses a fixed frequency, peak current mode boost regulator architecture to
regulate voltage at the feedback pin. The operation of the MA2009 can be understood by
referring to the block diagram of Block Diagram item. At the start of each oscillator cycle the
MOSFET is turned on through the control circuitry. To prevent sub-harmonic oscillations at
duty cycles greater than 50 percent, a stabilizing ramp is added to the output of the current
sense amplifier and the result is fed into the negative input of the PWM comparator. When
this voltage equals the output voltage of the error amplifier the power MOSFET is turned off.
The voltage at the output of the error amplifier is an amplified version of the difference
between the 0.6V band-gap reference voltage and the feedback voltage. In this way the
peak current level keeps the output in regulation. If the feedback voltage starts to drop, the
output of the error amplifier increases. These results in more current to flow through the
power MOSFET, thus increasing the power delivered to the output. The MA2009 has
internal soft start to limit the amount of input current at startup and to also limit the amount
of overshoot on the output.
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
4/9
MA2009
APPLICATION INFORMATION
Setting the Output Voltage
Application circuit item shows the basic application circuit with MA2009 adjustable
output version. The external resistor sets the output voltage according to the following
equation:
R1
V
0.6V x (1
)
OUT
R2
Table 1—Resistor Selection for Common Output Voltages
VOUT (V)
R2 (kΩ)
R1 (kΩ)
5
20
147
12
16
24
20
380
20
515
20
780
Input and Output Capacitor Selection
Input and output ceramic capacitors of 22μF are recommended for MA2009 applications. For
better voltage filtering, ceramic capacitors with low ESR are recommended. X5R and X7R
types are suitable because of their wider voltage and temperature ranges.
Inductor Selection
The recommended values of inductor are 4.7 to 22μH. Small size and better efficiency are the
major concerns for portable device, such as MA2009 used for mobile phone. The inductor
should have low core loss at 1.2MHz and low DCR for better efficiency. To avoid inductor
saturation current rating should be considered.
Schottky diode Selection
Schottky diode is a good choice for MA2009 because of its low forward voltage dropand fast
reverses recovery. Using Schottky diode can get better efficiency. The high speed rectification
is also a good characteristic of Schottky diode for high switching frequency. Current rating of
the diode must meet the root mean square of the peak current and output average current
multiplication as following:
ID
(RMS)
IOUT PEAK
I
The diode’s reverse breakdown voltage should be larger than the output voltage.
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
5/9
MA2009
PCB Layout Recommendations
When laying out the printed circuit board, the following checking should be used to ensure
proper operation of the MA2009. Check the following in your layout:
1. The power traces, consisting of the GND trace, the SW trace and the VIN trace should
be kept short, direct and wide.
2. Does the (+) plates of C1 connect to VIN as closely as possible. This capacitor provides
the AC current to the internal power MOSFETs.
3. Keep the switching node SW away from the sensitive VOUT rode.
4. Keep the (-) plates of C1 and C2 as close as possible.
C1's ground must be
as closer to IC's GND
pin as possible
R3
EN
5
6
4
SW should be
C1
connected to Inductor
by wide and short
trace, keep sensitive
components away
from this trace
L1
1
2
3
D1
SW
FB
R1
GND
C2
R2
C2's ground must be
as closer to IC's GND
pin as possible
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
6/9
MA2009
TYPICAL CHARACTERISTICS
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
7/9
MA2009
IOUT=50mA
POWER ON
VIN
VIN
VOUT
VOUT
VEN
LX
IOUT
IOUT
VIN
VIN
VOUT
VOUT
VOUT(AC)
LX
IOUT
ILX
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
8/9
MA2009
Package Outlines
D
C
GAUGE PLANE
L
L1
e
e1
b
Dimensions in Millimeters
Dimensions in Inches
Symbol
Min.
1.05
0.05
0.90
0.30
0.08
2.70
1.40
2.60
0.30
0.50
1.80
0.85
0o
Nom.
-
Max.
1.45
2.15
1.30
0.50
0.22
3.10
1.80
3.00
0.60
0.70
2.00
1.15
8o
Min.
Nom.
-
Max.
A
A1
A2
b
C
D
E1
E
L
L1
e1
e
0.041
0.002
0.035
0.012
0.003
0.106
0.055
0.102
0.012
0.020
0.071
0.033
0o
0.057
0.085
0.051
0.020
0.009
0.122
0.071
0.118
0.024
0.028
0.079
0.045
8o
-
-
1.10
-
-
0.043
-
-
2.90
1.60
2.80
-
0.60
1.90
1.00
4o
1.114
0.063
0.110
-
0.024
0.075
0.037
4o
θ
Major Power Technology Co., Ltd.
Rev 1.0 Sep. 14, 2016
9/9
相关型号:
![](http://pdffile.icpdf.com/pdf2/p00306/img/page/MA200KP295CV_1843819_files/MA200KP295CV_1843819_1.jpg)
![](http://pdffile.icpdf.com/pdf2/p00306/img/page/MA200KP295CV_1843819_files/MA200KP295CV_1843819_2.jpg)
MA200KP295CVCL
Trans Voltage Suppressor Diode, 200000W, 295V V(RWM), Bidirectional, 1 Element, Silicon, PLASTIC PACKAGE-2
MICROSEMI
©2020 ICPDF网 联系我们和版权申明