SPSB100 datasheet(11/214 Pages) STMICROELECTRONICS

No. de pieza	SPSB100

Descripción Electrónicos	Automotive power management IC for highly integrated processors

PDF	214 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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11 / 214 page

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BUCK2 (5.0 V): charged with 1 A (DC activation) at 2.4 MHz

•

BUCK3 (0.98 V): charged with 2 A (DC activation) at 2.4 MHz

Note:

1. BUCK3 load current is already considered in the power dissipation calculation, so 1 A is referred to BUCK1

external loads current.

2. Selecting the switching frequency at 2.4 MHz for BUCK1 and BUCK2 will lower the regulators efficiency and

this extra power to be dissipated can generate a faster thermal shut-down. In case the application requires a

high DC current load, it is strongly suggested using the switching frequency at 400 kHz for BUCK1 and

BUCK2.

The following curves show the relationship between max power dissipation vs ambient temperature:

Figure 4. Max power dissipation vs ambient temperature for case "A" and case "B"

0.000

0.500

1.000

1.500

2.000

2.500

3.000

3.500

4.000

4.500

5.000

-50

-25

100

125

150

175

200

Tamb. [°C]

Pwr_A [W]

Pwr_B [W]

SPSB100

Maximum ratings

DS14640 - Rev 1

page 11/214

SPSB100 Datasheet(PDF) 11 Page - STMicroelectronics