Datasheet > MPQ4456

MPQ4456

更新时间： 2024-04-09 19:03:03

品牌	Logo	应用领域
芯源 - MPS		/
页数	文件大小	规格书
16页	410K
描述
1A, 4MHz, 36V 降压变换器

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数据手册

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MPQ4456 数据手册

MPQ4456 –INDUSTRIAL GRADE, 1A, 4MHz, 36V STEP-DOWN CONVERTER

ELECTRICAL CHARACTERISTICS

V_IN= 12V, V_EN= 2.5V, V_COMP= 1.4V, T_J= -40°C to +125°C, unless otherwise noted. Typical values

are at T_J= 25°C.

Parameter

Symbol Condition

Min

Typ

Max Units

4.5V < V_IN< 36V, Tj=25

0.778 0.796 0.814

Feedback Voltage

V_FB

4.5V < VIN < 36V

V_FB= 0.8V

0.772

1.2

0.820

Feedback Bias Current

Upper Switch On Resistance⁽⁵⁾

Upper Switch Leakage

Current Limit

I_FB

0.01

300

μA

mΩ

μA

R_DS(ON)V_BST– V_SW= 5V

V_EN= 0V, V_SW= 0V, V_IN= 36V

Duty Cycle = 50%

1.8

3.1

2.4

COMP to Current Sense

G_CS

A/V

Transconductance⁽⁵⁾

Error Amp Voltage Gain⁽⁶⁾

Error Amp Transconductance

Error Amp Min Source current

Error Amp Min Sink current

VIN UVLO Threshold

VIN UVLO Hysteresis

Soft-Start Time⁽⁵⁾

200

V/V

µA/V

µA

I_COMP= ±3µA

V_FB= 0.7V

V_FB= 0.9V

2.6

1.6

–5

3.0

400

1.5

3.4

MHz

µA

°C

0V < V_FB< 0.8V

R_FREQ= 45.3kΩ

V_EN= 0V

Oscillator Frequency

Shutdown Supply Current

Quiescent Supply Current

Thermal Shutdown⁽⁵⁾

Thermal Shutdown Hysteresis⁽⁵⁾

Minimum Off Time⁽⁵⁾

f_S

2.4

I_Q

No load, V_FB= 0.9V

120

150

160

°C

100

Minimum On Time⁽⁵⁾

EN Up Threshold

1.2

1.5

300

1.8

EN Threshold Hysteresis

150

450

Note:

5) Derived from bench characterization. Not tested in production.

6) Guaranteed by design. Not tested in production.

MPQ4456 Rev. 1.01

1/27/2014

www.MonolithicPower.com

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

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