L5973AD datasheet(9/14 Pages) STMICROELECTRONICS

tên linh kiện	L5973AD

Giải thích chi tiết về linh kiện	2A SWITCH STEP DOWN SWITCHING REGULATOR

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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L5973AD

4.3 ZERO LOAD

Due to the fact that the internal power is a PDMOS, no boostrap capacitor is required and so, the device works prop-

erly also with no load at the output. In this condition it works in burst mode, with random repetition rate of the burst.

4.4 APPLICATION CIRCUIT

In figure 9 is shown the demo board application circuit, where the input supply voltage, Vcc, can range from 4.4V

to 25V due to the rated voltage of the input capacitor and the output voltage is adjustable from 1.235V to Vcc.

Figure 9. Demo board Application Circuit

Table 6. Component List

Reference

Part Number

Description

Manufacturer

µF, 25V

TOKIN

POSCAP 6TPB330M

330

µF, 6.3V

Sanyo

C1206C221J5GAC

220pF, 5%, 50V

KEMET

C1206C223K5RAC

22nF, 10%, 50V

KEMET

5.6K, 1%, 0.1W 0603

Neohm

3.3K, 1%, 0.1W 0603

Neohm

4.7K, 1%, 0.1W 0603

Neohm

STPS2L25U

2A, 25V

DO3316P-153

µH, 3A

COILCRAFT

D03IN1454

L5973AD

µF

25V

CERAMIC

330

µF

6.3V

VOUT=3.3V

VIN = 4.4V to 25V

5.6K

3.3K

4.7K

22nF

220pF

L1 15

µH

STPS2L25U

COMP

VCC

OUT

GND

INH

3.3V

SYNC.

VREF

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