MP5410 [MPS]
Low Start-up Voltage Boost Converter with Four SPDT Switches; 低启动电压升压转换器与四SPDT开关
| 型号： | MP5410 |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Low Start-up Voltage Boost Converter with Four SPDT Switches |
| 文件： | 总12页 (文件大小：458K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP5410
Low Start-up Voltage Boost Converter
with Four SPDT Switches
The Future of Analog IC Technology
DESCRIPTION
FEATURES
•
•
•
•
•
•
•
1.8V Low Voltage Start-Up
1.8V to 5.5V Input Range
Output Disconnection
Integrated Power MOS & Schottky Diode
Variable Frequency Control
<1µA Shutdown Current
Current Mode Control with Internal
Compensation
The MP5410 is a high efficiency, current mode
step-up converter with four single-pole/double-
throw (SPDT) switches designed for low-power
bias supply application. The device can boost
dual-cell NiCd/NiMH or single-cell Li+ battery to
10V output voltage.
The MP5410 can start up from an input voltage
as low as 1.8V. It uses a current limited variable
frequency control algorithm to optimize
efficiency and minimize external component
size and cost. The internal low resistance N-
Channel MOSFET switch can withstand up to
10V allowing the MP5410 to produce high
output voltage with high efficiency.
•
More than 80% Efficiency at Light Load
Conditions
•
•
Tiny External Components
Inrush Current Limiting and Internal Soft-
Start
•
•
•
Input UVLO
Over Temperature Protection
3x3mm QFN16 Package
In addition, the MP5410 can disconnect all
loads from input DC power supply. The
integrated schottky diode reduces external
parts to save critical board space.
APPLICATIONS
•
Dual-cell and Three-cell NiCd/NiMH or
Single-cell Li Battery Consumer Products
3D Glass Driver
Small LCD Displays Bias Supply
Digital Still and Video Cameras
Handheld Computers and PDAs
Cell Phones
The MP5410 features low shutdown current
allowing the part to draw less than 1µA off
current in shutdown mode. And it includes input
under voltage and over temperature protection.
•
•
•
•
•
The MP5410 is available in a small 16-pin QFN
3x3mm package.
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
L1
Efficiency
COUT
100
95
90
85
80
75
70
65
60
55
50
L
SW
OUT
IN
R1
R2
CIN
Battery
FB
EN
MP5410
ISET
GND
D
S0
S1
S2
S3
RISET
Control
Signal
A
B
C
1.6
2.6
3.6
4.6
5.6
VIN (V)
L+ L- R+ R-
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
MP5410EQ
QFN16 (3x3mm)
ABAY
-20°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP5410EQ–Z);
For RoHS Compliant Packaging, add suffix –LF (e.g. MP5410EQ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
PIN 1 ID
OUT
SW
IN
GND
13
16
15
14
L
EN
S1
S0
1
2
3
4
12 ISET
11
FB
10 S2
9
S3
5
6
7
8
A
B
C
D
EXPOSED PAD
CONNECT TO GND
QFN16 (3x3mm)
Thermal Resistance (4)
θJA
θJC
ABSOLUTE MAXIMUM RATINGS (1)
QFN16 (3x3mm) ....................60 ...... 12...°C/W
SW, OUT, A, B, C, D.....................-0.5V to +12V
All other Pins................................-0.5V to +6.5V
Continuous Power Dissipation (TA = +25°C) (2)
........................................................... 2.08W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions (3)
Supply Voltage VIN ..........................1.8V to 5.5V
Boost Converter Output Voltage.........VIN to 10V
Maximum Junction Temp. (TJ)............... +125°C
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)-
TA)/ θJA. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
3) The device is not guaranteed to function outside of its
operation conditions.
4) Measured on JESD51-7, 4-layer PCB.
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
ELECTRICAL CHARACTERISTICS
VIN = VEN = 2.4V, VOUT = 10V, IOUT = 2mA, TA = +25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ Max Units
Operating Input Voltage
Minimum Startup Voltage
Quiescent Current
VIN
1.8
5.5
1.8
50
1
V
V
VST
IQ NS
ISD
VOUT=0V
IOUT=0, VFB=1.3V, No switching
28
0.1
µA
µA
V
Shutdown Current
VEN=0V
IN Under Voltage Lockout
VUVLO
VIN Rising
1.58
1.7
Under Voltage Lockout
Hysteresis
100
mV
Step-up Converter
Maximum On Time
Minimum Off Time
SW On-Resistance
SW Leakage Current
SW Current Limit
TON
4
6
7.5
700
0.8
2
µs
ns
TOFF
400
550
0.65
RDS ON
ISW LKG
ISW LIMIT
ISW = 200mA
VSW=12V
Ω
µA
mA
RISET=300kΩ
180
0.5
10
Schottky Diode Forward
Voltage
VFW
IFW=100mA
0.4
9.7
0.6
V
V
Fixed OUT Supply Voltage
VOUT FIXED Let FB pin floating, 1.8V<VIN<5.5V
10.3
Connect R-divider to FB,
1.8V<VIN<5.5V
FB Voltage (Regulation Mode)
VFB
1.20 1.23 1.26
1
V
FB Input Bias Current
Control Interface
IFB
VFB = 1.23V
µA
EN/SX Input High Voltage
EN/SX Input Low Voltage
EN/SX Input Bias Current
SPDT Switch
VEN H
VEN L
IEN
1.4
0.4
1
V
V
µA
Switch On-Resistance
RSPDT ON VOUT=10V, IA, IB, IC, ID=2mA
25
50
10
Ω
Ω
Switch On-Resistance Match
Between Channels
∆RSPDT_ON VOUT=10V, IA, IB, IC, ID=2mA
Turn-on Time
Turn-off Time
Protection
TON
RL= 300Ω, CL= 35pF
RL= 300Ω, CL= 35pF
80
ns
ns
TOFF
170
Output Disconnect Switch On-
Resistance
RDISC_ON VOUT=10V
0.7
0.8
Ω
Thermal Shutdown
150
°C
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
PIN FUNCTIONS
Pin #
Name Pin Function
Inductor Output Pin. L is the output node of the internal disconnecting switch. Connect the
inductor to this pin.
1
L
On/Off control input. A logic high input turns on the chip. A logic low input turns off the chip.
This pin should not be left floating.
2
3
4
EN
S1
S0
Channel B SPDT Switch Control Input. If the chip is enabled, a logic low input switches B to
GND and a logic high input switches B to OUT. This pin should not be left floating.
Channel A SPDT Switch Control Input. If the chip is enabled, a logic low input switches A to
GND and a logic high input switches A to OUT. This pin should not be left floating.
5
6
7
8
A
B
C
D
Channel A SPDT Switch Output.
Channel B SPDT Switch Output.
Channel C SPDT Switch Output.
Channel D SPDT Switch Output.
Channel D SPDT Switch Control Input. If the chip is enabled, a logic low input switches D to
GND and a logic high input switches D to OUT. This pin should not be left floating.
9
S3
S2
FB
Channel C SPDT Switch Control Input. If the chip is enabled, a logic low input switches C to
GND and a logic high input switches C to OUT. This pin should not be left floating.
10
11
Regulation Feedback Input. Connect to an external resistive voltage divider from the output
to FB to set the boost converter output voltage. Floating this pin to achieve fixed 10V output.
Constant Peak Current Set. Connect to an external resistor to GND to set the boost
converter peak current.
12
13
14
ISET
GND
IN
Ground.
Input Supply Pin. IN pin powers the internal circuitry and is the input node of the internal
disconnecting switch. Must be locally bypassed.
Output Switch Node. SW is the drain node of the internal low-side N-Channel MOSFET.
Connect the inductor to SW to complete the step-up converter.
15
16
SW
OUT
Step-up Converter Output.
Exposed
Pad
Connect exposed pad to GND plane in PCB for proper thermal performance.
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
4
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VEN = 2.4V, VOUT = 10V, IOUT = 2mA, L = 10µH/150mΩ, unless otherwise noted.
Efficiency
V
IN
vs. Current Limit
R
ISET
vs. Current Limit
100
95
90
85
80
75
70
65
60
55
50
250
200
150
100
50
900
800
700
600
500
400
300
200
100
0
0
1.6
2.6
3.6
4.6
5.6
0
200 400 600 800 1000
1.6
2.6
3.6
4.6
5.6
VIN (V)
VIN (V)
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = VEN = 2.4V, VOUT = 10V, IOUT = 2mA, L = 10µH/150mΩ, unless otherwise noted.
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
6
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
FUNCTION BLOCK DIAGRAM
Figure 1—MP5410 Function Block Diagram
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
7
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
OPERATION
The MP5410 is a step-up converter with four
single-pole/double-throw (SPDT) switches
Soft-Start
The MP5410 provides soft-start by charging an
internal capacitor with a very weak current
source. The voltage on this capacitor, in turn,
slowly ramps the peak inductor current limit from
zero to the setting value. The MP5410 limits this
inrush current by increasing the current limit in
two steps, starting from ILIM/4 for 256 switching
cycles to ILIM/2 for the next 256 cycles, and then
full current limit. The soft-start time varies greatly
with load current; output voltage and input
voltage.
designed for low-power bias supply application. It
operates from an input voltage as low as 1.8V.
The 0.65ꢀ internal N-Channel MOSFET power
switch and low dropout voltage schottky diode
are driven with a variable frequency, constant
peak-current architecture for improved regulation
and low operating current. Operation can be best
understood by referring to the Block Diagram.
Output Disconnection
The MP5410 integrates disconnect switch
between IN pin & L pin. The disconnect switch is
composed of a NMOS and a PMOS in parallel.
The MP5410 can disconnect all loads from input
DC power supply when EN pin is connected to
ground.
Variable Frequency
Constant-Peak-Current Operation
When the power MOSFET is turned on the
inductor current increases until the current limit is
reached. The Power MOSFET is then turned off
for a setting minimum off time. At the end of this
minimum of time transition if the feedback pin is
still lower than the 1.23V internal reference the
power MOSFET will again be turned on,
otherwise the MP5410 waits until the voltage
drops below the threshold before turning on the
MOSFET again. This process allows for optimal
use of the inductor, while minimizing the output
ripple and size of the output capacitor and
maintaining low operating current.
Under Voltage Lockout
An under voltage lockout function prevents
device startup if the supply voltage on VBat is
lower than approximately 1.5V. When in
operation and the battery is being discharged,
the device automatically enters the shutdown
mode if the voltage on VIN drops below 1.5V.
System Start-Up
When the MP5410 is enabled, the PMOS of
disconnect switch is turned on first, and then the
system starts boosting the step-up converter with
an internal soft-start and the output voltage rises
up. The NMOS of disconnect switch is driven by
Vout. It will be turned on once the output voltage
reaches the threshold level. The on-resistance of
NMOS is smaller than that of PMOS, so the
PMOS is shorted by NOMS at normal operation
to reduce the conduction loss.
Integrated Schottky Diode
The high switching frequency demands a high-
speed rectification for optimum efficiency The
MP5410 integrates a low voltage-drop schottky
diode to reduce external parts to save critical
board space.
Four SPDT Switches
The MP5410 includes four SPDT analog
switches.
S0~S1
control
the
switches
It is recommended on the start up sequence that
the enable signal comes after input voltage
established.
respectively. If the chip is enabled, a logic low
input switches the relative channel output to GND
and a logic high input switches it to OUT.
Soft-start and inrush current limiting are provided
during start-up as well as normal mode
operation.
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
8
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
Table 1—Switching Selection Control Logic
Control Input
Switch Output
EN
S0
X
L
S1
X
L
S2
X
L
S3
X
L
A
B
C
D
L
Open
GND
OUT
GND
OUT
GND
OUT
GND
OUT
GND
OUT
GND
OUT
GND
OUT
GND
OUT
Open
GND
GND
OUT
OUT
GND
GND
OUT
OUT
GND
GND
OUT
OUT
GND
GND
OUT
OUT
Open
GND
GND
GND
GND
OUT
OUT
OUT
OUT
GND
GND
GND
GND
OUT
OUT
OUT
OUT
Open
GND
GND
GND
GND
GND
GND
GND
GND
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
L
L
H
L
L
L
H
H
H
H
L
L
H
L
L
L
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
L
L
H
L
L
H
H
H
H
H
L
L
H
H
H
H: High Level
L: Low Level
X: Don’t Care
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
9
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
APPLICATION INFORMATION
Components referenced below apply to
Typical Application Circuit on page 11.
Selecting the Input Capacitor
The input capacitor reduces the surge current
drawn from the input supply and the switching
noise from the device. The input capacitor
impedance at the switching frequency should be
less than the input source impedance to prevent
high frequency switching current from passing
through the input. Ceramic capacitors with X5R
or X7R dielectrics are highly recommended
because of their low ESR and small temperature
coefficients. For most applications, a 4.7µF or
10µF capacitor is sufficient.
Setting the SW Current Limit
The resistor on ISET pin is used to set the SW
current limit. The relationship of the SW current
limit vs. the ISET resistor is showed as the curve
in page 5. For Constant-Peak-Current Operation,
when the power MOSFET is turned on the
inductor current increases until the current limit is
reached. Since the response delay, the actual
SW peak current value exceeds the setting
current limit a little. Under the higher input
voltage and with the lower inductor, the actual
SW peak current is higher due to the faster SW
current di/dt. Under same condition, a lower
current limit allows lower SW current and higher
switching frequency, while a higher current limit
allows higher SW current and lower switching
frequency.
Selecting the Output Capacitor
The output capacitor keeps the output voltage
ripple small and ensures feedback loop stability.
The output capacitor impedance should be low at
the switching frequency. Ceramic capacitors with
X7R dielectrics are recommended for their low
ESR characteristics. For most applications, a
less than 10µF ceramic capacitor is sufficient.
Setting the Output Voltage
MP5410 features internal resistive voltage divider,
so floating the FB pin to achieve fixed about 10V
output. Connect to an external resistive voltage
divider from the output to FB to set the boost
converter output voltage. Set the output voltage
by selecting the resistive voltage divider ratio by
the equation:
Layout Considerations
Careful attention must be paid to the PCB board
layout and components placement. Proper layout
of the high frequency switching path is critical to
prevent noise and electromagnetic interference
problems. The loop of MP5410 SW to GND pin,
SW to OUT pin, and output capacitor is flowing
with high frequency pulse current. It must be as
short as possible. The IN pin is the power supply
input for the internal MOSFET switch gate driver
and the internal control circuitry. It must be locally
bypassed. See the MP5410 demo board layout
for reference.
R1+ R2
VOUT = VFB ×
R2
Where, VOUT is the output voltage, VFB = 1.23V.
For R1=178kꢀ and R2 = 24.9kꢀ, then VOUT
=
10V.
Selecting the Inductor
A inductor with a DC current rating of at least
40% higher than the maximum input current is
recommended for most applications at wide input
range. For highest efficiency, the inductor’s DC
resistance should be as small as possible.
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
10
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
TYPICAL APPLICATION CIRCUIT
Figure 2—Battery Powered, VOUT=10V, 3D Glass Driver
MP5410 Rev.1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
11
MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES
PACKAGE INFORMATION
QFN16 (3x3mm)
2.90
3.10
1.50
1.80
0.30
0.50
13
16
PIN 1 ID
SEE DETAIL A
PIN 1 ID
MARKING
0.18
12
1
4
0.30
2.90
3.10
1.50
1.80
0.50
BSC
PIN 1 ID
INDEX AREA
9
8
5
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
0.30x45º TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.80
1.00
0.20 REF
0.00
0.05
DETAIL A
SIDE VIEW
2.90
1.70
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE0.10 MILLIMETER MAX.
4) DRAWING CONFORMS TO JEDEC MO-220, VARIATION VEED-4.
5) DRAWING IS NOT TO SCALE.
0.70
0.25
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.
MP5410 Rev. 1.01
3/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
12
相关型号：
MP5420DM-LF-Z
Operational Amplifier, 4 Func, 20000uV Offset-Max, PDSO14, ROHS COMPLIANT, MO153AB-1, TSSOP-14
MPS
©2020 ICPDF网 联系我们和版权申明