MP3217
36V, 670kHz Step-up Converter
with a 0.5A Switch
The Future of Analog IC Technology
DESCRIPTION
The MP3217 is a monolithic step up converter
integrating a 0.5A, 0.6Ω internal switch. The
MP3217 uses current mode, fixed frequency
architecture to regulate the output voltage,
providing fast transient response and cycle by
cycle current limit.
The MP3217 includes under-voltage lockout, over
voltage protection and thermal overload
protection preventing damage in the event of an
output overload.
The MP3217 is available in small 6-pin TSOT23
package. The device is ROHS compliance.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
Internal 0.6Ω Power MOSFET
Up to 36V Output Voltage
670kHz Fixed Switching Frequency
42V Over Voltage Shutdown
Cycle-by-Cycle Over Current Protection
UVLO, Thermal Shutdown
Available in TSOT23-6 Packages
APD Bias Generation
Portable Applications
Handheld Computers and PDAs
Digital Still Cameras
APPLICATIONS
“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC Technology”
are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
D1
B0540
V
IN
=5V
V
OUT
=33V
EFFICIENCY (%)
90
80
70
60
50
40
Efficiency vs.
Output Current
IN
ENABLE
EN
SW
MP3217
FB
GND
PGND
0
2
4 6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
MP3217 Rev. 1.0
7/15/2014
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1
MP3217 –36V, 670kHz STEP-UP CONVERTER WITH A 0.5A SWITCH
ORDERING INFORMATION
Part Number*
MP3217DJ
Package
TSOT23-6
Top Marking
7H
Free Air Temperature (T
A
)
-40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP3217DJ–Z);
For RoHS Compliant Packaging, add suffix –LF (e.g. MP3217DJ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
PGND
GND
FB
1
2
3
6
5
4
SW
IN
EN
ABSOLUTE MAXIMUM RATINGS
(1)
SW Pin..........................................-0.5V to +44V
All Other Pins ...............................-0.3V to +6.5V
(2)
Continuous Power Dissipation (T
A
= +25°C)
.......................................................... 0.56W
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -55°C to +150°C
Thermal Resistance
(4)
θ
JA
θ
J
C
TSOT23-6 ..............................220 .... 110 ..
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX)=(T
J
(MAX)-
T
A
)/θ
JA
. 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
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
Recommended Operating Conditions
(3)
IN Supply Voltage ..............................2.5V to 6V
SW Pin ................................................V
IN
to 36V
Operating Junct. Temp (T
J
)...... -40°C to +125°C
MP3217 Rev. 1.0
7/15/2014
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
2
MP3217 –36V, 670kHz STEP-UP CONVERTER WITH A 0.5A SWITCH
ELECTRICAL CHARACTERISTICS
V
IN
= V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters
Operating Input Voltage
Supply Current (Shutdown)
Supply Current (Quiescent)
Switching Frequency
Maximum Duty Cycle
Under Voltage Lockout
IN Under Voltage Lockout
Under Voltage Lockout
Hysteresis
Over Voltage Shutdown
Threshold
Enable
EN OFF Threshold
EN ON Threshold
Feedback
FB Voltage
FB Input Bias Current
Output Switch
SW On-Resistance
(5)
SW Current Limit
(5)
Thermal Shutdown
(5)
Symbol
V
IN
Condition
V
EN
= 0V
V
FB
= 0.15V
Min
2.5
Typ
Max
6
10
560
770
Units
V
µA
µA
kHz
%
V
mV
V
V
V
V
nA
Ω
A
°C
f
SW
V
FB
= 0V
UVLO
V
IN
Rising
570
92
460
670
2.25
92
2.45
V
OV
V
OV
Rising
V
EN
Falling
V
EN
Rising
0.8
42
2
1.20
1.24
-100
0.6
0.50
150
1.28
V
FB
V
FB
= 1.2V
R
ON
Duty Cycle = 60%
Notes:
5) Guaranteed by design.
MP3217 Rev. 1.0
7/15/2014
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
3
MP3217 –36V, 670kHz STEP-UP CONVERTER WITH A 0.5A SWITCH
PIN FUNCTIONS
Pin #
1
2
3
Name
PGND
GND
FB
Pin Function
Power Ground.
Ground.
Feedback Input. Reference voltage is 1.24V, Connect a resistor divider from the
output to this pin.
ON/OFF Control Input. A voltage greater than 2V will turn the part on and less than
0.8V will turn the part off. When not used, float EN to the input source for automatic
startup.
Input Supply Pin. Must be locally bypassed.
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the
power inductor and output rectifier to SW.
4
5
6
EN
IN
SW
MP3217 Rev. 1.0
7/15/2014
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
4
MP3217 –36V, 670kHz STEP-UP CONVERTER WITH A 0.5A SWITCH
TYPICAL PERFORMANCE CHARACTERISTICS
Circuit refer to Figure 2, V
IN
=5V, V
OUT
=33V, T
A
=+25˚C, unless otherwise noted.
Efficiency vs.
Output Current
1000
Current Limit vs. Duty
V
FB
=0V
0.60
900
800
700
600
500
400
300
200
100
0
10 20 30 40 50 60 70 80 90 100
DUTY (%)
Load Regulation
90
CURRENT LIMIT (mA)
LOAD REGULATION(%)
EFFICIENCY (%)
80
70
60
50
40
0.40
0.20
0.00
-0.20
-0.40
-0.60
0
5
10
15
20
OUTPUT CURRENT (mA)
25
0
2
4 6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
Line Regulation
0.30
I
OUT
=10mA
Steady State
I
OUT
=0mA
Steady State
I
OUT
=10mA
LINE REGULATION (%)
0.20
0.10
0.00
-0.10
-0.20
I
INDUCTOR
100mA/div
2us/div
I
INDUCTOR
100mA/div
2us/div
V
SW
20V/div
V
OUT
/AC
20mV/div
V
SW
20V/div
V
OUT
/AC
50mV/div
-0.30
4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5
INPUT VOLTAGE (V)
V
IN
Power On
I
OUT
=10mA
V
SW
20V/div
V
IN
2V/div
V
OUT
20V/div
I
INDUCTOR
200mA/div
1ms/div
V
IN
Power Off
I
OUT
=10mA
EN Power On
I
OUT
=10mA
V
SW
20V/div
V
EN
5V/div
V
OUT
20V/div
I
INDUCTOR
200mA/div
V
SW
20V/div
V
IN
2V/div
V
OUT
20V/div
I
INDUCTOR
200mA/div
2ms/div
200us/div
MP3217 Rev. 1.0
7/15/2014
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
5
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