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MP2365

3A, 28V, 1.4MHz Step-Down Converter

Monolithic Power Systems 

MP2365 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER

PACKAGE REFERENCE

TOP VIEW

BS 1

IN 2

SW 3

GND 4

8 SS

7 EN

6 COMP

5 FB

EXPOSED PAD

CONNECT TO PIN 4

Part Number* Package

Temperature

MP2365DN

SOIC8N –40°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP2365DN–Z)

For RoHS compliant packaging, add suffix –LF

(eg. MP2365DN–LF–Z)

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage VIN....................... –0.3V to +30V

Switch Voltage VSW.............. –0.5V to VIN + 0.3V

Boost Voltage VBS..........VSW – 0.3V to VSW + 6V

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)

Input Voltage VIN............................ 4.75V to 28V

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

Thermal Resistance (3) θJA θJC

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

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

Parameters

Symbol Condition

Shutdown Supply Current

Supply Current

Feedback Voltage

Error Amplifier Voltage Gain

Error Amplifier Transconductance

High-Side Switch-On Resistance

Low-Side Switch-On Resistance

High-Side Switch Leakage Current

Short Circuit Current Limit

VFB

AVEA

GEA

RDS(ON)1

RDS(ON)2

VEN = 0V

VEN = 3V, VFB =1.4V

4.75V ≤ VIN ≤ 28V,

VCOMP < 2V

∆ICOMP = ±10µA

VEN = 0V, VSW = 0V

Current Sense to COMP Transconductance

Oscillation Frequency

Short Circuit Oscillation Frequency

Maximum Duty Cycle

Minimum On Time

EN Threshold Voltage

GCS

fS

DMAX

TON

VFB = 0V

VFB = 0.8V

Enable Pull Up Current

Under Voltage Lockout Threshold Rising

VEN = 0V

Under Voltage Lockout Threshold Hysteresis

Soft-Start Period

Thermal Shutdown

CSS = 0.1µF

Min Typ Max Units

20 30 µA

1.3 1.5 mA

0.90 0.92 0.94 V

400

V/V

330 530 730 µA/V

100

mΩ

10

Ω

0.1 10 µA

6.5

A

6.2

A/V

1.4

MHz

220

KHz

65

%

130

ns

0.9 1.2 1.5 V

0.9 1.6 2.3 µA

2.3 2.6 2.9 V

210

mV

10

ms

160

°C

MP2365 Rev. 0.91

www.MonolithicPower.com

2

7/10/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

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