MP3209DJ [MPS]
1.4MHz, 350mA Boost Converter;
| 型号： | MP3209DJ |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | 1.4MHz, 350mA Boost Converter 开关 光电二极管 |
| 文件： | 总11页 (文件大小：397K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP3209
1.4MHz, 350mA
Boost Converter
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP3209 is a current mode step up
converter intended for small, low power
applications. The MP3209 switches at 1.4MHz
and allows the use of tiny, low cost inductor and
capacitor to achieve a solution less than 1mm
in height. Internal soft start results in small
inrush current and extends battery life.
•
•
•
•
•
•
•
2.5V to 6V Input Voltage Range
On Board Power MOSFET
Uses Tiny Capacitors and Inductors
1.4MHz Fixed Switching Frequency
Internally Compensated
Internal Soft-Start
Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
UVLO, Thermal Shutdown
Internal Current Limit
Available in TSOT23-5 and Ultra-Thin 2x2
QFN Packages
The MP3209 includes under-voltage lockout,
current limiting, and thermal overload protection
to prevent damage in the event of an output
overload. The MP3209 is available in small
5-pin TSOT23 and 2mm x 2mm ultra-thin QFN
8-pin packages.
•
•
•
APPLICATIONS
•
•
•
•
Cell Phones
External Modems
Small LCD Displays
OLED Drivers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Current
D1
VOUT
15V
95
92
89
86
83
80
VIN
3V - 6V
C3
100pF
IN
SW
FB
OFF ON
EN
MP3209
GND
R2
V
=4
v
v
IN
V
=15
OUT
10
20
30
40
50
60
LOAD CURRENT (mA)
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
PACKAGE REFERENCE
TOP VIEW
TOP VIEW
GND
IN
1
2
3
4
8
7
6
5
SW
NC
SW
GND
FB
1
2
3
5
4
IN
NC
EN
FB
GND
EN
Exposed pad connect to GND
Part Number*
MP3209DJ
Package
Temperature
Part Number*
Package
Temperature
TSOT23-5
–40°C to +85°C
MP3209DGU
2x2 UTQFN
–40°C to +85°C
For Tape & Reel, add suffix –Z (e.g. MP3209DJ–Z)
For RoHS Compliant Packaging, add suffix –LF
(Egg. MP3209DJ–LF–Z)
For Tape & Reel, add suffix –Z (egg. MP3209DGU–Z)
For RoHS Compliant Packaging, add suffix –LF
(Egg. MP3209DGU–LF–Z)
*
*
ABSOLUTE MAXIMUM RATINGS (1)
Recommended Operating Conditions (2)
Supply Voltage VIN............................. 2.5V to 6V
Output Voltage VOUT ........................... 3V to 22V
Operating Temperature .............–40°C to +85°C
SW Pin...........................................–0.3V to 25V
All Other Pins................................–0.3V to 6.5V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature.............. –65°C to +150°C
Thermal Resistance (3)
θJA
θJC
TSOT23-5..............................220.... 110.. °C/W
2x2 UTQFN ............................80...... 12... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating range.
3) Measured on approximately 1” square of 1oz. copper.
ELECTRICAL CHARACTERISTICS
VIN = VEN = 5V, TA = +25°C unless otherwise specified.
Parameters
Symbol Condition
Min
Typ
Max
6
Units
V
Operating Input Voltage
UVLO Ramp Up
VIN
2.5
VIN-UVLO
2.25
92
2.45
V
UVLO Hysteresis
mV
µA
µA
MHz
%
Supply Current (Shutdown)
Supply Current (Quiescent)
Switching Frequency
Maximum Duty Cycle
EN Threshold
VEN = 0V
VFB = 1.3V
fSW
0.1
635
1.4
85
1
850
1.65
1.15
80
VFB = 0V
VEN Rising, VIN=2.5V
1.0
1.3
100
1.6
V
EN Hysteresis
mV
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
ELECTRICAL CHARACTERISTICS (continued)
VIN = VEN = 5V, TA = +25°C unless otherwise specified.
Parameters
Symbol Condition
VEN = 0V, VIN=6V
Min
Typ
Max
1
Units
µA
V
EN Input Bias Current
FB Voltage
VFB
1.21
1.25
–30
0.5
1.29
FB Input Bias Current
SW On-Resistance (4)
SW Current Limit (4)
SW Leakage
VFB = 1.25V
–100
nA
Ω
RDS (ON)
Duty Cycle = 60%
VSW = 15V
0.35
A
1
µA
Thermal Shutdown (4)
160
°C
Note:
4) Guaranteed by design.
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
C1=10µF, C2=4.7µF, L=22µH, R3=26.1kΩ, C3=100pF, Ta=25ºC. Unless otherwise noted. (Figure 2)
Efficiency vs.
Load Current
Efficiency vs.
Load Current
Efficiency vs.
Load Current
95
92
89
86
83
80
95
92
89
86
83
80
95
93
91
89
87
85
V
OUT
=6V
IN
V
V
=4V
IN
OUT
V
V
=5V
IN
OUT
V
=12V
=12V
=12V
0
40
80
120
160
0
20 40
60 80 100 120
0
20
40
60
80
100
LOAD CURRENT(mA)
LOAD CURRENT(mA)
LOAD CURRENT(mA)
Efficiency vs
Load Current
Line Regulation
Load Regulation
12.3
12.2
12.1
12.0
11.9
11.8
12.4
12.2
12.0
11.8
11.6
11.4
95
92
89
86
83
80
V
=4.5V
IN
V =4V
IN
V
=3.5V
IN
V
IN
=3V
VIN=5V
IOUT=10mA
4.5 5.0
VOUT=15V
3.0
3.5
4.0
0
20
40
60
80
100
10 20 30 40 50 60 70 80
LOAD CURRENT(mA)
INPUT VOLTAGE(V)
LOAD CURRENT(mA)
Maximum Current vs
Duty Cycle
Quiescent Current
Supply Shut Down Current
1.0
0.8
0.6
0.4
0.2
0.0
800
700
600
500
400
300
1.0
0.8
0.6
0.4
0.2
0.0
200
100
0
2.5
3.2
3.9
4.6
5.3
6.0
20 30 40 50 60
DUTY CYCLE (%)
80 90
2.5
3.2
3.9
4.6
5.3
6.0
INPUT VOLTAGE(V)
INPUT VOLTAGE(V)
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
4
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C1=10µF, C2=4.7µF, L=22µH, R3=26.1kΩ, C3=100pF, Ta=25ºC. Unless otherwise noted.
MP3209 Rev.0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
PIN FUNCTIONS
TSOT23-5 UTQFN8
Name Function
Pin #
Pin #
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 22V.
1
8
SW
2
3
1, 5
6
GND Ground.
FB
Feedback Input. FB voltage is 1.25V. Connect a resistor divider to FB.
Regulator On/Off Control Input. A high input at EN turns on the converter, and a
low input turns it off. When not used, connect EN to the input source for automatic
startup. The EN pin cannot be left floating.
4
5
4
EN
2
IN
Input Supply Pin. Must be locally bypassed.
No Connect.
3, 7
NC
OPERATION
The MP3209 uses a fixed frequency, peak current
mode boost regulator architecture to regulate
voltage at the feedback pin. The operation of the
MP3209 can be understood by referring to the
block diagram of Figure 1. 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
1.25V bandgap 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. This results in more
current to flow through the power MOSFET, thus
increasing the power delivered to the output.
The MP3209 has internal soft start to limit the
amount of input current at startup and to also
limit the amount of overshoot on the output. The
current limit is increased by a fourth every 40µs
giving a total soft start time of 120µs.
R
C
C
C
SW
-
FB
+
-
CONTROL
M1
+
LOGIC
ERROR
AMPLIFIER
PWM
COMPARATOR
1.25V
+
-
+
CURRENT
SENSE
AMPLIFIER
1.3MHz
OSC
GND
Figure 1—Functional Block Diagram
MP3209 Rev.0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
6
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
APPLICATIONS INFORMATION
Selecting the Inductor
COMPONENT SELECTION
The inductor is required to force the output
voltage higher while being driven by the lower
input voltage. Choose an inductor that does not
saturate at the SW current limit. A good rule for
determining the inductance is to allow the peak-
to-peak ripple current to be approximately 30%-
50% of the maximum input current. Make sure
that the peak inductor current is below 75% of
the typical current limit at the duty cycle used to
prevent loss of regulation due to the current
limit variation.
Setting the Output Voltage
Set the output voltage by selecting the resistive
voltage divider ratio. Use 510kꢀ for the high-
side resistor R1 of the voltage divider.
Determine the low-side resistor R2 by the
equation:
R1× VFB
R2 =
VOUT − VFB
where VOUT is the output voltage.
Calculate the required inductance value L using
the equations:
(It is recommended to add feed-forward
resistor R3 and C3 to improve the transient
performance.) (Figure 2)
VIN(VOUT - VIN )
L =
Selecting the Input Capacitor
VOUT × fSW × ΔI
An input capacitor is required to supply the AC
ripple current to the inductor, while limiting noise
at the input source. This capacitor must have low
ESR, so ceramic is the best choice.
VOUT ×ILOAD
(MAX)
IIN(MAX)
=
VIN ×η
30% − 50% IIN(MAX)
ΔI =
)
Use an input capacitor value of 4.7μF or greater.
This capacitor must be placed physically close
to the IN pin. Since it reduces the voltage ripple
seen at IN, it also reduces the amount of EMI
passed back along that line to the other circuitry.
Where ILOAD(MAX) is the maximum load current, ΔI
is the peak-to-peak inductor ripple current, and η
is efficiency. For the MP3209, 10µH is
recommended for input voltages less than 3.3V
and 22µH for inputs greater than 3.3V.
Selecting the Output Capacitor
A single 4.7μF to 10μF ceramic capacitor
usually provides sufficient output capacitance
for most applications. If larger amount of
capacitance is desired for improved line support
and transient response, tantalum capacitors
can be used in parallel with the ceramic. The
impedance of the ceramic capacitor at the
switching frequency is dominated by the
capacitance, and so the output voltage ripple is
mostly independent of the ESR. The output
voltage ripple VRIPPLE is calculated as:
Selecting the Diode
The output rectifier diode supplies current to the
inductor when the internal MOSFET is off. To
reduce losses due to diode forward voltage and
reverse recovery, use a Schottky diode. Choose a
diode whose maximum reverse voltage rating is
greater than the maximum output voltage. For
output voltage less than 20V, it is recommended
to choose the CMH5H-3 for most applications.
This diode is used for load currents less than
300mA. For ultra-low-profile applications, choose
BAT54-02 Schottky diode. Use two BAT54-02 in
parallel for high load current.
ILOAD
VO − VIN
UT
VRIPPLE
=
VO × C2× fSW
UT
Where VIN is the input voltage, ILOAD is the load
current, C2 is the capacitance of the output
capacitor, and fSW is the 1.4MHz switching
frequency.
MP3209 Rev.0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
7
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
LAYOUT CONSIDERATIONS
High frequency switching regulators require
very careful layout for stable operation and low
noise. All components must be placed as close
to the IC as possible. Keep the path between
MP3209, D1, and C2 extremely short for
minimal noise and ringing. C1 must be placed
close to the IN pin for best decoupling. All
feedback components must be kept close to the
FB pin to prevent noise injection on the FB pin
trace. The ground return of C1 and C2 should
be tied close to the GND pin. See the MP3209
demo board layout for reference.
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
8
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
TYPICAL APPLICATION CIRCUITS
D1
CMHSH-3
V
OUT
V
5V
IN
12V
50mA
SOD323
C3
100pF
IN
EN
SW
FB
OFF ON
MP3209
GND
Figure 2—VIN = 5V, VOUT = 12V, IOUT = 50mA Boost Circuit
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
9
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
PACKAGE INFORMATION
TSOT23-5
0.95
BSC
0.60
TYP
2.80
3.00
5
4
1.20
TYP
1.50
1.70
2.60
TYP
2.60
3.00
1
3
TOP VIEW
RECOMMENDED LAND PATTERN
0.84
0.90
1.00 MAX
SEATING PLANE
0.09
0.20
0.30
0.50
0.00
0.10
0.95 BSC
SEE DETAIL "A"
FRONT VIEW
SIDE VIEW
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSION OR GATE BURR.
GAUGE PLANE
0.25 BSC
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSION.
0.30
0.50
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.10 MILLIMETERS MAX.
0o-8o
5) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
DETAIL A
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
10
MP3209 – 1.4MHZ, 350mA BOOST CONVERTER
2mm x 2mm UTQFN8
PIN 1 ID
SEE DETAIL A
1.90
2.10
0.25
0.45
0.45
0.65
PIN 1 ID
MARKING
0.18
0.30
8
5
1
1.90
2.10
1.05
1.25
0.50
BSC
PIN 1 ID
INDEX AREA
4
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
R0.10 TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.50
0.60
0.15 REF
0.00
0.05
SIDE VIEW
DETAIL A
NOTE:
1.90
0.60
0.70
0.25
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) JEDEC REFERENCE IS MO-229, VARIATION VCCD-3.
5) DRAWING IS NOT TO SCALE.
1.20
0.50
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.
MP3209 Rev. 0.941
11/30/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
11
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