MP2354DS datasheet(2/10 Pages) MPS

2 / 10 page

MP2354 – 2A, 23V, 380KHz STEP-DOWN CONVERTER

MP2354 Rev. 1.4

www.MonolithicPower.com

1/6/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

SYNC

BST

VIN

RUN

COMP

GND

TOP VIEW

MP2354_PD01-SOIC8

Part Number*

Package

Temperature

MP2354DS

SOIC8

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP2354DS–Z)

For Lead Free, add suffix –LF (eg. MP2354DS–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

Supply Voltage (VIN) .................................... 25V

Switch Voltage (VLX) ....................... –1V to +26V

Bootstrap Voltage (VBST)....................... VLX + 6V

Feedback Voltage (VFB) ................... –0.3 to +6V

Enable/UVLO Voltage (VRUN)........... –0.3 to +6V

Comp Voltage (VCOMP) ..................... –0.3 to +6V

Sync Voltage (VSYNC) ....................... –0.3 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 23V

Operating Temperature .............–40

°C to +85°C

Thermal Resistance

(3)

θJA

θJC

SOIC8.................................... 105 ..... 50...

°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

Feedback Voltage

VFB

4.75V

≤ VIN ≤ 23V

1.198

1.222

1.246

Upper Switch On Resistance RDS(ON)1

0.18

Ω

Lower Switch On Resistance RDS(ON)2

Ω

Upper Switch Leakage

VRUN = 0V, VLX = 0V

µA

Current Limit

(4)

2.7

3.4

Current Sense

Transconductance

Output Current to Comp Pin

Voltage

GCS

1.95

A/V

Error Amplifier Voltage Gain

AVEA

400

V/V

Error Amplifier

Transconductance

GEA

∆IC = ±10µA

500

700

1000

µA/V

Oscillator Frequency

342

380

418

KHz

Short Circuit Frequency

VFB = 0V

KHz

Sync Frequency

Sync Drive 0V to 2.7V

445

600

KHz

Maximum Duty Cycle

DMAX

VFB = 1.0V

Minimum Duty Cycle

DMIN

VFB = 1.5V

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