MPS MP2104DJ, MP2104DJ-1.5, MP2104DJ-1.8 Schematic [ru]

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 Output Voltage

MP2104DJ-1.5 V
MP2104DJ-1.8 V

MP2104DJ V

EVALUATION BOARD REFERENCE

Board Number Dimensions

EV2104DJ-00A 2.0”X x 2.0”Y x 0.5”Z

= 1.5V

OUT

= 1.8V

OUT

= 0.6V to 6V

OUT

FEATURES

• 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

APPLICATIONS

• Cellular and Smart Phones

• Microprocessors and DSP Core Supplies

• PDAs

• MP3 Players

• Digital Still and Video Cameras

• Portable Instruments

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.

TYPICAL APPLICATION

Efficiency vs
Load Current

100

V

= 3.3V

INPUT

2.5V - 6V

4

IN

SW

3

OUTPUT

1.8V
600mA

MP2104DJ-1.8

OFF ON

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1

GND

2

5

OUTEN

MP2104_TAC_S01

IN

90

80

70

60

50

40

30

EFFICIENCY (%)

20

10

0

10 100 1000

V

= 4.2V

IN

LOAD CURRENT (mA)

MP2104-EC01

TM

MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER

PACKAGE REFERENCE

TOP VIEW

EN

1

GND

2

SW

3

Part Number* Package Temperature

MP2104DJ TSOT23-5

For Tape & Reel, add suffix –Z (eg. MP2104DJ–Z)

*

For Lead Free, add suffix –LF (eg. MP2104DJ–LF–Z)

ABSOLUTE MAXIMUM RATINGS

VIN to GND ..................................–0.3V to +6.5V

V

to GND........................... –0.3V to VIN +0.3V

SW

V

, VEN to GND ..........................–0.3V to +6.5V

FB

SW Peak Current........................................ 1.4A

Junction Temperature.............................+150°C

Lead Temperature

Storage Temperature ............. –65°C to +150°C

54FB

C2YW

IN

MP2104_PD01-TSOT23-5

–40°C to +85°C

(2)

..............................+260°C

(1)

TOP VIEW

EN

1

GND

2

SW

3

Part Number** Package Marking Temp

MP2104DJ-1.5

MP2104DJ-1.8

For Tape & Reel, add suffix –Z (eg. MP2104DJ-1.5–Z)

**

For Lead Free, add suffix –LF (eg. MP2104DJ-1.5–LF–Z)

Recommended Operating Conditions

TSOT23-5 D7YW

TSOT23-5 D8YW

MARKING

54OUT

MP2104_PD02-TSOT23-5

IN

–40°C to

+85°C

(3)

Supply Voltage VIN............................. 2.5V to 6V

Output Voltage V

.......................... 0.6V to 6V

OUT

Operating Temperature .............–40°C to +85°C

Thermal Resistance

(4)

θ

JA

θJC

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.

ELECTRICAL CHARACTERISTICS

(5)

VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

Supply Current VEN = VIN, VFB = 0.65V 400 600 µA

Shutdown Current VEN = 0V, VIN = 6V 0.01 1 µA

IN Under Voltage Lockout
Threshold

IN Under Voltage Lockout
Hysteresis

Regulated FB Voltage

FB Input Bias Current VFB = 0.65V, MP2104DJ –50 0.5 +50 nA

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Rising Edge 2.10 2.27 2.45 V

55 mV

TA = +25°C, MP2104DJ 0.588 0.600 0.612

–40°C ≤ T

≤ +85°C 0.582 0.600 0.618

A

V

TM

MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER

ELECTRICAL CHARACTERISTICS (continued)

(5)

VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

MP2104DJ-1.5

= 50mA

I

OUT

Regulated Output Voltage

–40°C ≤ T

≤ +85°C

A

MP2104DJ-1.8
I

= 50mA

OUT

–40°C ≤ T

≤ +85°C

A

PFET On Resistance ISW = 100mA 0.44 Ω

NFET On Resistance ISW = –100mA 0.29 Ω

SW Leakage Current

PFET Current Limit

V

Duty Cycle = 100%,

= 0V, VIN = 6V

EN

V

= 0V or 6V

SW

Current Pulse Width < 1ms

Oscillator Frequency 1.26 1.70 2.08 MHz

Thermal Shutdown Trip
Threshold

145

EN Trip Threshold –40°C ≤ TA ≤ +85°C 0.3 0.96 1.5 V

EN Input Current VEN = 0V to 6V –1 +1 µA

Notes:

5) 100% production test at +25°C. Typical and temperature specifications are guaranteed by design and characterization.

1.455 1.500 1.545

V

1.746 1.800 1.854

–1 +1 µA

0.7 1.0 1.35 A

°C

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© 2005 MPS. All Rights Reserved.

TM

MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 3.3V, V

= 1.8V, L1 = 10µH, C1 = 4.7µF, C3 = 10µF, TA = +25°C, unless otherwise noted.

OUT

Efficiency vs
Load Current

100

90

V

80

70

V

= 4.2V

IN

60

50

40

30

EFFICIENCY (%)

20

10

0

10 100 1000

LOAD CURRENT (mA)

IN

= 3.3V

Efficiency vs
Load Current

100

90

80

70

60

50

40

30

EFFICIENCY (%)

20

10

0

10 100 1000

LOAD CURRENT (mA)

V
V

OUT
IN

= 1.8V

= 3.3V

MP2104-TPC01

MP2104-TPC03

Efficiency vs
Load Current

100

V

= 3.3V

IN

90

80

70

60

50

40

30

EFFICIENCY (%)

20

10

0

10 100 1000

V

= 4.2V

IN

LOAD CURRENT (mA)

Efficiency vs
Load Current

100

90

80

70

60

50

40

30

EFFICIENCY (%)

20

10

0

10 100 1000

LOAD CURRENT (mA)

V
V

OUT
IN

= 1.8V

= 4.2V

MP2104-TPC02

MP2104-TPC04

Output Voltage vs
Load Current

1.85

1.83

1.81

1.79

1.77

1.75

1.73

1.71

1.69

OUTPUT VOLTAGE (V)

1.67

1.65

0 100 200 300 400 500 600 700 800 900

LOAD CURRENT (mA)

V

IN

Output Voltage vs
Supply Voltage

1.810

1.808

1.806

1.804

1.802

OUTPUT VOLTAGE (V)

1.800
23456

SUPPLY VOLTAGE (V)

I

LOAD

= 200mA

= 3.3V

MP2104-TPC05

MP2104-TPC06

Regulated FB Voltage vs
Temperature

0.620

0.615

0.610

0.605

0.600

0.595

0.590

0.585

REGULATED FB VOLTAGE (V)

0.580

-50 -30 -10 10 30 40 70 90 110 130 -50 -30 -10 10 30 40 70 90 110 130
TEMPERATURE (°C)

MP2104-TPC07

PFET Current Limit vs
Temperature

1.3

1.2

1.1

1.0

0.9

0.8

PFET CURRENT LIMIT (A)

0.7

TEMPERATURE (°C)

MP2104-TPC08

Oscillator Frequency vs
Supply Voltage

2.05

1.95

1.85

1.75

1.65

1.55

1.45

1.35

OSCILLATOR FREQUENCY (MHz)

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

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© 2005 MPS. All Rights Reserved.