MP2358 datasheet(2/9 Pages) MPS

2 / 9 page

MP2358 – 2A, 23V, 370KHz STEP-DOWN CONVERTER

MP2358 Rev. 1.3

www.MonolithicPower.com

3/23/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

MP2358_PD01-QFN10

TOP VIEW

COMP

GND

EXPOSED PAD

ON BACKSIDE

Part Number*

Package

Temperature

MP2358DQ

QFN10

(3mm x 3mm)

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP2358DQ–Z)

For Lead Free, add suffix –LF (eg. MP2358DQ–LF–Z)

GND

COMP

TOP VIEW

MP2358_PD02_SOIC8

Part Number**

Package

Temperature

MP2358DS

SOIC8

–40

°C to +85°C

** For Tape & Reel, add suffix –Z (eg. MP2358DS–Z)

For Lead Free, add suffix –LF (eg. MP2358DS–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

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

Switch Node Voltage (VSW) .......................... 26V

Bootstrap Voltage (VBS) ....................... VSW + 6V

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

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

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

SS Voltage (VSS) ............................–0.3V to +6V

Junction Temperature............................ +150

°C

Lead Temperature ................................. +260

°C

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

°C

Recommended Operating Conditions

(2)

Supply Voltage (VIN) ...................... 4.75V to 23V

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

°C to +85°C

Thermal Resistance

(3)

θJA

θJC

QFN10 (3x3)........................... 50 ...... 12...

°C/W

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

0.892

0.920

0.948

Upper Switch On Resistance

RDS(ON)1

0.18

Ω

Lower Switch On Resistance

RDS(ON)2

Ω

Upper Switch Leakage

VEN = 0V, VSW = 0V

µA

Current Limit

(4)

2.8

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

550

830

1150

µA/V

Oscillator Frequency

370

KHz

Short Circuit Frequency

VFB = 0V

240

KHz

Soft-Start Pin Equivalent

Output Resistance

kΩ

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