MP1593DN datasheet(2/11 Pages) MPS

2 / 11 page

MP1593 – 3A, 28V, 385KHz STEP-DOWN CONVERTER

MP1593 Rev. 1.9

www.MonolithicPower.com

9/14/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

Part Number*

Package

Temperature

MP1593DN

SOIC8E

(Exposed Pad)

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP1593DN–Z)

For RoHS Compliant Packaging, add suffix –LF

(eg. MP1593DN–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

SOIC8E (Exposed Pad).......... 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.

Parameter

Symbol Condition

Min

Typ

Max

Units

Shutdown Supply Current

VEN = 0V

µA

Supply Current

VEN = 2.6V, VFB = 1.4V

1.0

1.2

Feedback Voltage

VFB

4.75V

≤ VIN ≤ 28V

VCOMP < 2V

1.194

1.222

1.250

Error Amplifier Voltage Gain

AEA

400

V/V

Error Amplifier

Transconductance

GEA

∆ICOMP = ±10µA

500

800

1120

µA/V

High-Side Switch

On-Resistance

RDS(ON)1

100

140

mΩ

Low-Side Switch

On-Resistance

RDS(ON)2

Ω

High-Side Switch Leakage

Current

VEN = 0V, VSW = 0V

µA

Current Limit

4.8

6.2

7.6

Current Sense to COMP

Transconductance

GCS

5.4

A/V

Oscillation Frequency

fOSC1

335

385

435

KHz

Short Circuit Oscillation

Frequency

fOSC2

VFB = 0V

KHz

Maximum Duty Cycle

DMAX

VFB = 1.0V

Minimum Duty Cycle

DMIN

VFB = 1.5V

GND

COMP

TOP VIEW

EXPOSED PAD

ON BACKSIDE

CONNECT TO PIN 4

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