TM
MP2104
1.7MHz, 600mA Synchronous
Step-Down Converter
The Future of Analog IC Technology
TM
DESCRIPTION
The MP2104 is a 1.7MHz constant frequency,
current mode, PWM step-down converter. The
device integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode. It is ideal for powering
portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. The MP2104 can supply
600mA of load current from a 2.5V to 6V input
voltage. The output voltage for the MP2104DJ
can be regulated as low as 0.6V, while the output
voltages
of
the
MP2104DJ-1.5
and
MP2104DJ-1.8 are fixed at 1.5V and 1.8V,
respectively. The MP2104 can also run at 100%
duty cycle for low dropout applications.
The MP2104 is available in a low profile (1mm)
5-pin, TSOT package.
ORDERING INFORMATION
Part Number
MP2104DJ-1.5
MP2104DJ-1.8
MP2104DJ
Board Number
EV2104DJ-00A
Output Voltage
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 0.6V to 6V
Dimensions
2.0”X x 2.0”Y x 0.5”Z
FEATURES
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High Efficiency: Up to 95%
1.7MHz Constant Switching Frequency
600mA Available Load Current
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1µA Shutdown Current
1.5V and 1.8V Fixed Output Versions
Space Saving 5-Pin TSOT23 Package
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
APPLICATIONS
EVALUATION BOARD REFERENCE
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Current
100
INPUT
2.5V - 6V
4
IN
SW
3
MP2104DJ-1.8
OFF ON
1
EN
GND
2
OUT
5
EFFICIENCY (%)
OUTPUT
1.8V
600mA
90
80
70
60
50
40
30
20
10
0
V
IN
= 3.3V
V
IN
= 4.2V
MP2104_TAC_S01
10
100
LOAD CURRENT (mA)
1000
MP2104-EC01
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1
TM
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
EN
GND
SW
1
5
FB
EN
GND
4
IN
SW
1
TOP VIEW
5
OUT
MARKING
C2YW
MP2104_PD01-TSOT23-5
2
3
2
3
4
IN
MP2104_PD02-TSOT23-5
Part Number*
MP2104DJ
*
Package
TSOT23-5
Temperature
–40°C to +85°C
Part Number**
MP2104DJ-1.5
MP2104DJ-1.8
Package
TSOT23-5
TSOT23-5
Marking
D7YW
D8YW
Temp
–40°C to
+85°C
For Tape & Reel, add suffix –Z (eg. MP2104DJ–Z)
For Lead Free, add suffix –LF (eg. MP2104DJ–LF–Z)
**
For Tape & Reel, add suffix –Z (eg. MP2104DJ-1.5–Z)
For Lead Free, add suffix –LF (eg. MP2104DJ-1.5–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
to GND ..................................–0.3V to +6.5V
V
SW
to GND........................... –0.3V to V
IN
+0.3V
V
FB
, V
EN
to GND ..........................–0.3V to +6.5V
SW Peak Current ........................................ 1.4A
Junction Temperature .............................+150°C
(2)
Lead Temperature ..............................+260°C
Storage Temperature ............. –65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
............................. 2.5V to 6V
Output Voltage V
OUT
.......................... 0.6V to 6V
Operating Temperature .............–40°C to +85°C
Thermal Resistance
(4)
TSOT23-5.............................. 220 .... 110..
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) For recommended IR reflow temperature information, refer to
MPS document MP2104_IRRTP.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on approximately 1” square of 1 oz copper.
θ
JA
θ
JC
ELECTRICAL CHARACTERISTICS
(5)
V
IN
= V
EN
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameter
Supply Current
Shutdown Current
IN Under Voltage Lockout
Threshold
IN Under Voltage Lockout
Hysteresis
Regulated FB Voltage
FB Input Bias Current
Symbol Condition
V
EN
= V
IN
, V
FB
= 0.65V
V
EN
= 0V, V
IN
= 6V
Rising Edge
Min
Typ
400
0.01
2.27
55
T
A
= +25°C, MP2104DJ
–40°C
≤
T
A
≤
+85°C
V
FB
= 0.65V, MP2104DJ
0.588
0.582
–50
0.600
0.600
0.5
0.612
0.618
+50
Max
600
1
2.45
Units
µA
µA
V
mV
V
nA
2.10
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
2
TM
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
(continued)
(5)
V
IN
= V
EN
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameter
Symbol Condition
MP2104DJ-1.5
I
OUT
= 50mA
–40°C
≤
T
A
≤
+85°C
MP2104DJ-1.8
I
OUT
= 50mA
–40°C
≤
T
A
≤
+85°C
I
SW
= 100mA
I
SW
= –100mA
V
EN
= 0V, V
IN
= 6V
V
SW
= 0V or 6V
Duty Cycle = 100%,
Current Pulse Width < 1ms
Min
1.455
Typ
1.500
Max
1.545
V
1.746
1.800
0.44
0.29
–1
0.7
1.26
1.0
1.70
145
–40°C
≤
T
A
≤
+85°C
V
EN
= 0V to 6V
0.3
–1
0.96
1.5
+1
+1
1.35
2.08
1.854
Ω
Ω
µA
A
MHz
°C
V
µA
Units
Regulated Output Voltage
PFET On Resistance
NFET On Resistance
SW Leakage Current
PFET Current Limit
Oscillator Frequency
Thermal Shutdown Trip
Threshold
EN Trip Threshold
EN Input Current
Notes:
5) 100% production test at +25°C. Typical and temperature specifications are guaranteed by design and characterization.
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
3
TM
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 3.3V, V
OUT
= 1.8V, L1 = 10µH, C1 = 4.7µF, C3 = 10µF, T
A
= +25°C, unless otherwise noted.
Efficiency vs
Load Current
100
90
80
V
IN
= 3.3V
100
90
80
Efficiency vs
Load Current
V
IN
= 3.3V
V
IN
= 4.2V
1.85
1.83
Output Voltage vs
Load Current
OUTPUT VOLTAGE (V)
1.81
1.79
1.77
1.75
1.73
1.71
1.69
1.67
V
IN
= 3.3V
0 100 200 300 400 500 600 700 800 900
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
100
LOAD CURRENT (mA)
1000
MP2104-TPC01
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
V
IN
= 4.2V
100
LOAD CURRENT (mA)
1000
MP2104-TPC02
1.65
LOAD CURRENT (mA)
MP2104-TPC05
Efficiency vs
Load Current
100
90
80
100
90
70
60
50
40
30
20
10
1000
0
80
Efficiency vs
Load Current
1.810
Output Voltage vs
Supply Voltage
OUTPUT VOLTAGE (V)
1.808
1.806
1.804
1.802
I
LOAD
= 200mA
1000
1.800
2
3
4
5
SUPPLY VOLTAGE (V)
6
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
V
OUT
= 1.8V
V
IN
= 3.3V
100
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 1.8V
V
IN
= 4.2V
10
100
LOAD CURRENT (mA)
MP2104-TPC03
MP2104-TPC04
MP2104-TPC06
Regulated FB Voltage vs
Temperature
0.620
1.3
PFET Current Limit vs
Temperature
OSCILLATOR FREQUENCY (MHz)
2.05
1.95
1.85
1.75
1.65
1.55
1.45
1.35
Oscillator Frequency vs
Supply Voltage
REGULATED FB VOLTAGE (V)
PFET CURRENT LIMIT (A)
0.615
0.610
0.605
0.600
0.595
0.590
0.585
0.580
-50 -30 -10 10 30 40 70 90 110 130
TEMPERATURE (°C)
MP2104-TPC07
1.2
1.1
1.0
0.9
0.8
0.7
-50 -30 -10 10 30 40 70 90 110 130
TEMPERATURE (°C)
MP2104-TPC08
1.25
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
MP2104-TPC09
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
4
TM
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
(continued)
V
IN
= 3.3V, V
OUT
= 1.8V, L1 = 10µH, C1 = 4.7µF, C3 = 10µF, T
A
= +25°C, unless otherwise noted.
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
5
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