SC4525FEVB datasheet(4/23 Pages) SEMTECH

tên linh kiện	SC4525FEVB

Giải thích chi tiết về linh kiện	18V, 3A, 350kHz Step-Down Switching Regulator

PDF	23 Pages

Scroll/Zoom	100%

nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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4 / 23 page

SC4525F

Parameter

Conditions

Min

Typ

Max

Units

Minimum Switch On-time

IN = 0 V, RSW = 0Ω

230

Minimum Switch Off-time

IN = 6 V, RSW = 6Ω

Switch Leakage Current

µA

Minimum Bootstrap Voltage

SW = -3.9A

2.3

BST Pin Current

SW = -3.9A

Oscillator

Switching Frequency

SET = 60.4kΩ

275

350

425

kHz

Foldback Frequency

SET = 60.4kΩ, VFB = 0

kHz

Soft Start and Overload Protection

SS/EN Shutdown Threshold

0.2

0.3

0.4

SS/EN Switching Threshold

FB = 0 V

0.95

Soft-start Charging Current

SS/EN = 0 V

µA

SS/EN = .5 V

2.4

3.2

Soft-start Discharging Current

µA

Hiccup Arming SS/EN Voltage

SS/EN Rising

2.5

Hiccup SS/EN Overload Threshold

SS/EN Falling

Hiccup Retry SS/EN Voltage

SS/EN Falling

0.6

Over Temperature Protection

Thermal Shutdown Temperature

°C

Thermal Shutdown Hysteresis

°C

Note : Switch current limit does not vary with duty cycle.

Electrical Characteristics (Cont.)

Unless otherwise noted, V

IN = 2V, VBST = 5V, VSS = 2.2V, -40°C < TA = TJ < 25°C, RSET = 60.4kΩ.

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