SC4503 datasheet(17/22 Pages) SEMTECH

tên linh kiện	SC4503

Giải thích chi tiết về linh kiện	1.3MHz Step-Up Switching Regulator with 1.4A Switch

PDF	22 Pages

Scroll/Zoom	100%

nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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 2007 Semtech Corp.

www.semtech.com

SC4503

POWER MANAGEMENT

Typical Application Circuits

VOUT

4.7

µF

SC4503

GND

SHDN/SS

10BQ015

µF

60.4k

187k

1.5

µH

15k

56nF

2.6 - 4.2V

1-CELL

LI-ION

OFF

3.3V

< 0.4V

10pF

Efficiency vs Load Current

0.001

0.010

0.100

1.000

Load Current (A)

VOUT = 5V

1.3MHz

VIN = 3.6V

VIN = 2.6V

VIN = 4.2V

Upper Trace : Output Voltage, AC Coupled, 0.2V/div

Lower Trace : Inductor Current, 0.5A/div

Upper Trace : Output Voltage, AC Coupled, 0.2V/div

Lower Trace : Inductor Current, 0.5A/div

Load Transient Response. I

OUT is switched

between 0.15A and 0.9A

Figure 11(d).

Load Transient Response. I

OUT is switched

between 0.1A and 0.5A

Figure 11(c).

VIN = 2.6V

VIN = 4.2V

µs/div

Efﬁciency of the Li-ion Cell to 5V

Boost Converter

Figure 11(b).

Figure 11(a). Single Li-ion Cell to 5V Boost Converter

L1: TDK VLF4012AT

C1: Murata GRM188R60J475K

C2: Murata GRM21BR60J106K

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