MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER

MP2307 Rev. 1.7

www.MonolithicPower.com

2

3/14/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

TM

PACKAGE REFERENCE

BS

IN

SW

GND

SS

EN

COMP

FB

1

2

3

4

8

7

6

5

TOP VIEW

MP2307_PD01_SOIC8N

EXPOSED PAD

ON BACKSIDE

Part Number*

Package

Temperature

MP2307DN

SOIC8N

(Exposed Pad)

–40° to +85°C

For Lead Free, add suffix –LF (eg. MP2307DN–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

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

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

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

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

Recommended Operating Conditions

(2)

Ambient Operating Temp .............. –40°C to +85°C

Thermal Resistance

(3)

SOIC8N .................................. 50 ...... 10...

°C/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its

operating conditions.

3) Measured on approximately 1” square of 1 oz copper.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Shutdown Supply Current

0.3

3.0

µA

Supply Current

1.3

1.5

mA

Feedback Voltage

4.75V

0.900

0.925

0.950

V

Feedback Overvoltage Threshold

1.1

V

Error Amplifier Voltage Gain

(4)

400

V/V

Error Amplifier Transconductance

820

µA/V

High-Side Switch On-Resistance

(4)

100

mΩ

Low-Side Switch On-Resistance

(4)

100

mΩ

High-Side Switch Leakage Current

0

10

µA

Upper Switch Current Limit

Minimum Duty Cycle

4.0

5.8

A

Lower Switch Current Limit

From Drain to Source

0.9

A

COMP to Current Sense

Transconductance

5.2

A/V

Oscillation Frequency

300

340

380

KHz

Short Circuit Oscillation Frequency

110

KHz

Maximum Duty Cycle

90

%

Minimum On Time

(4)

220

ns

EN Shutdown Threshold Voltage

1.1

1.5

2.0

V

EN Shutdown Threshold Voltage

Hysterisis

220

mV