MA2009CA [MPOWER]

1.2MHz 2A, High Voltage, Boost Converte;


型号：	MA2009CA
厂家：	Major-Power
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

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

PWM

CONTROL

LOGIC

COMP

DRIVER

ILIMIT

Enable

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.

VIN

Top View

GND

(

)

GND Ground Pin.

Feedback Input. The FB voltage is 0.6V.

Connect a resistor divider to FB.

Regulator On/Off Control Input. A high

input at EN turns on the converter,

Input Supply Pin.

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 T_A=25°C)

Characteristics Symbol

Rating

Unit

VIN,EN pin voltage

SW pin voltage

FB pins voltage

-0.3 to 20

-0.3 to 30

-0.3 to 6

( T_J-T_A) / θ_JA

-40 to 85

150

V_SW

Continuous Power Dissipation

Operating Temperature

Top

T_J

°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: θ_JAis measured with the PCB copper are (need connect to GND) of approximately 1 in²(Multi-layer).

θ_JC

θ_JA

°C/W

250



ELECTRICAL CHARACTERISTICS

(V_IN= 5V, V_EN= 5V, T_A= 25°C)

Characteristics

Input Voltage Range

Input UVLO

Symbol

Conditions

Min Typ Max Units

V_IN

2.6

UVLO Rising

1.7 2.55

UVLO Hysteresis

0.1

Step-Up Voltage Adjust Range V_OUT

Quiescent Current

Shutdown Current

FB Pin Voltage

I_CCQI_OUT= 0mA, V_FB=0.7V

100 200 μA

I_SDV_EN= 0V

0.1

μA

V_FB

0.588 0.600 0.612

Switching frequency

Maximum Duty

F_OSC

800 1200 1500 KHz

D_MAX

SW current limit(Note 1)

I_LIMDuty=50%

MOSFET on-resistance(Note 1) R_DS(on)V_CC=5V, I_SW=1A

80 150 mΩ

SW Leakage Current

I_SWLV_SW= 28V, V_FB=0.7V

µA

EN high-level input voltage

EN low-level input voltage

V_IH

V_IL

1.5

0.4

Thermal Shutdown

T_DS

150

°C

Note1: Guaranteed by design, not tested.

Major Power Technology Co., Ltd.

Rev 1.0 Sep. 14, 2016

3/9

MA2009



APPLICATION CIRCUIT

B340A

V_IN=5V

4.7uH

V_OUT=12V

100K

380K

VIN

GND

22uF

20K

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:

 0.6V x (1

)

OUT

Table 1—Resistor Selection for Common Output Voltages

V_OUT(V)

R2 (kΩ)

R1 (kΩ)

147

380

515

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:

I_D

(RMS) 

I_OUT _PEAK

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

SW should be

connected to Inductor

by wide and short

trace, keep sensitive

components away

from this trace

GND

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

VOUT

VEN

IOUT

VIN

VOUT

VOUT(AC)

IOUT

ILX

Major Power Technology Co., Ltd.

Rev 1.0 Sep. 14, 2016

8/9

MA2009

 Package Outlines

GAUGE PLANE

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

0^o

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

8^o

Min.

Nom.

Max.

0.041

0.002

0.035

0.012

0.003

0.106

0.055

0.102

0.012

0.020

0.071

0.033

0^o

0.057

0.085

0.051

0.020

0.009

0.122

0.071

0.118

0.024

0.028

0.079

0.045

8^o

1.10

0.043

2.90

1.60

2.80

0.60

1.90

1.00

4^o

1.114

0.063

0.110

0.024

0.075

0.037

4^o

Major Power Technology Co., Ltd.

Rev 1.0 Sep. 14, 2016

9/9

MA2009CA [MPOWER]

相关型号：

MA200K

MA200KP295CVCL

MA200WA

MA200WK

MA201

MA201-110V

MA201-110V-CU

MA201-CU

MA20101BAN

MA20101BBN

MA20101CAN

MA20101CBN