SPSB100 datasheet(86/213 Pages) STMICROELECTRONICS

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Figure 54. Current limitation curves of BUCK1, 2 for Vout 6.5 V

0.5

1.5

2.5

3.5

6.5

7.5

8.5

VIN12 [V]

400 kHz

2.4 MHz

7.10

BUCK3 converter

The voltages are referred to GND and currents are assumed positive, when the current flows into the pin.

3 V ≤ VIN13 ≤ 7 V, Tj = -40 °C to 150 °C, unless otherwise specified.

Table 31. BUCK3 converter

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Vin3_L(1)(2)

Input voltage range

Vout_buck3 = 1.25 V or below

5.25

Vin3_H(1)(2)

Input voltage range

Vout_buck3 = 3.3 V

4.85

Vout_buck3_11X(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 11X

VIN3 = 3 V to 5.5 V

Iload = 50 mA to 3 A

0.9215 0.95 0.9785

Vout_buck3_101(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 101

VIN3 = 3 V to 5.5 V

Iload = 50 mA to 3 A

0.9312 0.96 0.9888

Vout_buck3_100(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 100

VIN3 = 3 V to 5.5 V

Iload = 50 mA to 3 A

0.9409 0.97 0.9991

Vout_buck3_000(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 000

VIN3 = 3 V to 5.5 V

Iload = 50 mA to 3 A

0.9506 0.98 1.0094

Vout_buck3_001(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 001

VIN3 = 3 V to 5.5 V

Iload = 50 mA to 3 A

0.9603 0.99 1.0197

Vout_buck3_010(1)(2)

Output voltage

BUCK3_PU_VALUE = 001

BUCK3_FTUNE = 010

VIN3 = 3 V to 5.5 V

0.97

1.0

1.03

SPSB100

Electrical characteristics

DS14640 - Rev 2

page 86/213

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