MIC2174 datasheet(4/24 Pages) MICREL

Il numero della parte	MIC2174

Spiegazioni elettronici	300kHz, Synchronous Buck Controller 300kHz, Synchronous Buck Controller

PDF	24 Pages

Scroll/Zoom	100%

Produttore elettronici	MICREL [Micrel Semiconductor]

Homepage	http://www.micrel.com

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4 / 24 page

Micrel, Inc.

MIC2174

September 2009

M9999-090409-B

Parameter

Condition

Min

Typ

Max

Units

Oscillator

Switching Frequency

Measured in Test Mode

0.225

0.3

0.375

MHz

Maximum Duty Cycle

Measured at DH

(8)

Minimum Duty Cycle

Measured at DH

FET Drives

DH, DL Output Low Voltage

ISINK = 10mA

0.1

DH, DL Output High Voltage

ISOURCE = 10mA

VIN-0.1V

VBST-0.1V

DH On-Resistance, High State

2.1

3.3

Ω

DH On-Resistance, Low State

1.8

3.3

Ω

DL On-Resistance, High State

1.8

3.3

Ω

DL On-Resistance, Low State

1.2

2.3

Ω

LX Leakage Current

VLX = 40V, VIN = 5.5V,VBST = 45.5V

µA

HSD Leakage Current

VLX = 40V, VIN = 5.5V,VBST = 45.5V

µA

Thermal Protection

Over-temperature Shutdown

155

°C

Over-temperature Shutdown

Hysteresis

°C

Shutdown Control

En Logic Level Low

3V < VIN <5.5V

0.4

0.8

En Logic Level High

3V < VIN <5.5V

0.9

1.2

En Pull-up Current

µA

Note:

8. The maximum duty cycle is limited by the fixed mandatory off time TOFF of typical 363ns.

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