MPS MP1469GJ Schematic

MP1469

The Future of Analog IC Technology

DESCRIPTION

The MP1469 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 1.5A continuous output current over a wide input supply range, with excellent load and line regulation. The MP1469 has synchronous-mode operation for higher efficiency over the output current-load range.

Current-mode operation provides fast transient response and eases loop stabilization.

Protection features include over-current protection and thermal shutdown.

The MP1469 requires a minimal number of readily-available, standard, external components and is available in a space-saving 6-pin TSOT23 package.

High-Efficiency, 1.5A, 16V, 500kHz

Synchronous, Step-Down Converter

In 6 Pin SOT 23

FEATURES

• Wide 4.7V-to-16V Operating Input Range

• 255m/160m Low-R

Internal Power

DS(ON)

MOSFETs

• Proprietary Switching-Loss–Reduction

Technique

• High-Efficiency Synchronous-Mode

Operation

• Fixed 500kHz Switching Frequency

• AAM Power-Save Mode for High Efficiency

at Light Load

• Internal Soft-Start

• Over-Current Protection and Hiccup

• Thermal Shutdown

• Output Adjustable from 0.8V

• Available in a 6-pin TSOT-23 package

APPLICATIONS

• GameStations

• Digital Set-Top Boxes

• Flat-Panel Television and Monitors

• General Purposes

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page.

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

TYPICAL APPLICATION

VIN

GND

EN

1

5

IN

U1

MP1469

EN

GND

2

BST

SW

FB

4

3

R3

6

59k

3.3V/1.5A VOUT

R1

40.2k

R2 13k

100

95

90

85

80

75

70

65

60

55

50

0.01 0.1 1 10

MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

ORDERING INFORMATION

Part Number* Package Top Marking

MP1469GJ TSOT23-6 ADM

* For Tape & Reel, add suffix –Z (e.g. MP1469GJ–Z);

PACKAGE REFERENCE

TOP VIEW

ABSOLUTE MAXIMUM RATINGS

(1)

VIN ..................................................-0.3V to 17V

V

......................................................................

SW

-0.3V (-5V for <10ns) to 17V (19V for <10ns)

V

......................................................... VSW+6V

BS

All Other Pins...................................–0.3V to 6V

Continuous Power Dissipation (T

= +25°C)

A

(2)

........................................................... 0.57W

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

Lead Temperature ....................................260°C

Storage Temperature................. -65°C to 150°C

Recommended Operating Conditions

(3)

Supply Voltage VIN...........................4.7V to 16V

Output Voltage V Operating Junction Temp. (T

.................... 0.8V to Vin-3V

OUT

). -40°C to +125°C

J

Thermal Resistance

(4)

θ

JA

θJC

TSOT-23-6............................. 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 ambient thermal resistance 

. The maximum allowable continuous power dissipation at

T

A

any ambient temperature is calculated by P (MAX)-TA)/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.

(MAX), the junction-to-

J

, and the ambient temperature

JA

(MAX) = (T

D

J

MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

ELECTRICAL CHARACTERISTICS

(5)

VIN = 12V, TA = 25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

Supply Current (Shutdown) IIN VEN = 0V 1 A

Supply Current (Quiescent) Iq VEN = 2V, VFB = 1V 0.83 mA

HS Switch-On Resistance HS

LS Switch-On Resistance LS

Switch Leakage SW

Current Limit

AAM Peak Current I

(5)

I

AAM_PEAK

Oscillator Frequency fSW VFB=0.75V 400 490 580 kHz

Maximum Duty Cycle D

Minimum On Time

(5)

t

ON_MIN

Feedback Voltage VFB 776 800 824 mV

EN Rising Threshold V

EN Falling Threshold V

EN_RISING

EN_FALLING

V

RDS-ON

Vcc=5V 160 m

RDS-ON

VEN = 0V, VSW =12V 1 A

LKG

2.5 3.0 A

LIMIT

=5V 255 m

BST-SW

0.5 A

VFB=700mV 88 92 %

MAX

90 ns

1.4 1.5 1.6 V

1.23 1.32 1.41 V

EN Input Current IEN

VEN=2V 1.6 A

=0 0 A

V

EN

VIN Under-Voltage Lockout Threshold—Rising

VIN Under-Voltage Lockout Threshold—Hysteresis

INUV

3.85 4.2 4.55 V

Vth

340 mV

HYS

Soft-Start Period tSS 1 ms

Thermal Shutdown

Thermal Hysteresis

Notes:

5) Guaranteed by design.

(5)

150 °C

(5)

20 °C

MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

TYPICAL CHARACTERISTICS

VIN = 12V, V

= 3.3V, L = 6.5µH, TA = +25°C, unless otherwise noted.

OUT

100

95

90

85

80

75

EFFICIENCY (%)

70

65

60

0.01 0.1 1 10 0.01 0.1 1 10 0.01 0.1 1 10

100

90

80

70

60

EFFICIENCY (%)

50

40

0.01 0.1 1 10

LOAD CURRENT (A)

100

95

90

85

80

75

70

65

60

55

50

LOAD CURRENT (A)

2

1.5

1

0.5

0

-0.5

-1

REGULATION (%)

-1.5

-2 0 0.3 0.6 0.9 1.2 1.5

LOAD CURRENT (A)

100

95

90

85

80

75

70

65

60

55

50

LOAD CURRENT (A)

2

1.5

1

0.5

0

-0.5

-1

-1.5

-2 5678910111213141516

INPUT VOLTAGE (V)

Peak Current vs. Duty Cycle

4.0

3.8

3.6

3.4

3.2

3.0

2.8

2.6

PEAK CURRENT (A)

2.4

2.2

2.0 01020304050607080 90

DUTY CYCLE (%)

30

25

20

15

10

5

0

0.0 0.3 0.6 0.9 1.2 1.5 LOAD CURRENT (A)

870

860

850

840

830

820

810

800

46810121416

INPUT VOLTAGE (V)

MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

TYPICAL CHARACTERISTICS (continued)

VIN = 12V, V

= 3.3V, L = 6.5µH, TA = +25°C, unless otherwise noted.

OUT

MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 12V, V

Startup through Input Voltage

I

OUT

= 3.3V, L = 6.5µH, TA = +25°C, unless otherwise noted.

OUT

Shutdown through Input Voltage

= 0A

I

OUT

= 0A

Startup through Input Voltage

I

= 1.5A

OUT

V

OUT

2V/div.

V

10V/div.

V

SW

5V/div.

500mA/div.

V

OUT

2V/div.

V

10V/div.

V

SW

5V/div.

1A/div.

IN

I

L

Shutdown through Input Voltage

I

= 1.5A

OUT

IN

I

L

V

OUT

2V/div.

V

10V/div.

V

SW

5V/div.

200mA/div.

V

OUT

2V/div.

V

EN

2V/div.

V

SW

10V/div.

500mA/div.

IN

I

L

Startup through Enable

I

= 0A

OUT

I

L

V

OUT

2V/div.

V

10V/div.

V

SW

5V/div.

1A/div.

V

OUT

2V/div.

V

EN

2V/div.

V

SW

10V/div.

500mA/div.

IN

I

L

Shutdown through Enable

I

= 0A

OUT

I

L

V

OUT

2V/div.

V

2V/div.

V

SW

10V/div.

1A/div.

Startup through Enable

I

= 1.5A

OUT

EN

I

L

Shutdown through Enable

I

= 1.5A

OUT

V

OUT

2V/div.

V

EN

2V/div.

V

SW

10V/div.

I

L

1A/div.

V

OUT/AC

50mV/div.

V

IN/AC

200mV/div.

V

SW

10V/div.

1A/div.

Input/Output Ripple

I

= 1.5A

OUT

I

L

MPS MP1469GJ Schematic [ru]

Specifications and Main Features

Frequently Asked Questions

User Manual