Datasheet > MP1477

MP1477

更新时间： 2024-04-09 19:01:54

品牌	Logo	应用领域
芯源 - MPS		/
页数	文件大小	规格书
19页	906K
描述
17V、3A、800kHz 高效率同步降压变换器，支持 COT 控制功能，采用 SOT563 封装

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数据手册

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MP1477 数据手册

MP1477 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

ELECTRICAL CHARACTERISTICS

VIN = 12V, T_J= -40°C to +125°C ⁽⁷⁾, typical value is tested at T_J= +25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

Max

Units

μA

Supply current (shutdown)

Supply current (quiescent)

HS switch on resistance

LS switch on resistance

Switch leakage

I_IN

I_Q

V_EN= 0V

V_EN= 2V, V_FB= 0.85V

170

200

240

μA

HS_RDS(ON)V_BST-SW= 3.3V

LS_RDS(ON)

mΩ

μA

SW_LKG

I_LIMIT

V_EN= 0V, V_SW= 12V

Valley current limit

V_OUT= 0V

2.7

-250

600

5.8

V_OUT= 3.3V, Lo = 2.2μH,

I_OUT= 0A

ZCD

I_ZCD

250

Oscillator frequency

Minimum on time ⁽⁸⁾

Minimum off time ⁽⁸⁾

f_SW

V_FB= 0.75V

800

1000

kHz

T_{ON_MIN}

T_{OFF_MIN}

180

805

T_J= +25°C

793

789

817

821

100

V_REF

Feedback voltage

V_REF

T_J= -40°C to 125°C

Feedback current

FB UV threshold (H to L)

Hiccup duty cycle ⁽⁸⁾

EN rising threshold

EN hysteresis

I_FB

V_{UV_th}

Hiccup entry

V_EN= 2V

75%

D_Hiccup

V_{EN_RISING}

V_{EN_HYS}

I_EN

1.14

1.2

100

1.26

µA

EN input current

VIN under-voltage lockout

threshold rising

INUV_Vth

3.7

1.6

4.18

VIN under-voltage lockout

threshold hysteresis

INUV_HYS

330

Soft-start period

Thermal shutdown ⁽⁸⁾

Thermal hysteresis ⁽⁸⁾

NOTES:

T_SS

TSD

2.5

150

°C

TSD_HYS

7) Guaranteed by over-temperature correlation, not tested in production.

8) Guaranteed by design and engineering sample characterization.

MP1477 Rev. 1.0

9/12/2017

www.MonolithicPower.com

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

1 2 345 6 7...19

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