SPSB100 datasheet(79/214 Pages) STMICROELECTRONICS

79 / 214 page

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Tsoftstart_buck2_01(3)

Soft start time slope when start-up

BUCK2_SS_VALUE = 01

4.95

8.25

11.9 V/ms

Tsoftstart_buck2_10(3)

Soft start time slope when start-up

BUCK2_SS_VALUE = 10

1.98

3.3

4.62 V/ms

Tsoftstart_buck2_11(3)

Soft start time slope when start-up

BUCK2_SS_VALUE = 11

0.99

1.65

2.31 V/ms

Fsw_buck2_0

Switching frequency

BUCK2_FREQ = 0

2.0

2.4

2.8

MHz

Fsw_buck2_1

Switching frequency

BUCK2_FREQ = 1

333

400

470

kHz

Fspread_buck2_24(3)

Spread spectrum range (enable/

disable by BUCK2_SPREAD_ENA)

Fsw_buck2 = 2.4 MHz

-8

Fspread_buck2_04(3)

Spread spectrum range (enable/

disable by BUCK2_SPREAD_ENA)

Fsw_buck2 = 400 kHz

-20

+20

PHI_buck2(3)(2)

Phase shift to BUCK1

225

deg

RPD_OFF_buck2

Pull-down resistor in off

Vout = 3.3 V

Ω

Ibuck2_LP

Output current in low power mode

VIN12 = 14 V

100

Vbuck2_LP_00

Output voltage in low power mode

BUCK2_PU_VALUE = 00

Line/load transients not included

Ripple included

VIN12 = 8.5 V to 16 V

Iload = 50 μA to IBuck2_LP

3.08

3.3

3.51

Vbuck2_LP_01

Output voltage in low power mode

BUCK2_PU_VALUE = 01

Line/load transients not included

Ripple included

VIN12 = 8.5 V to 16 V

Iload = 50 μA to IBuck2_LP

4.75

5.25

Vbuck2_LP_1X

Output voltage in low power mode

BUCK2_PU_VALUE = 1x

Line/load transients not included

Ripple included

VIN12 = 8.5 V to 16 V

Iload = 50 μA to IBuck2_LP

6.22

6.5

6.78

Isw_limit_buck2_LP

Peak current limit in LP mode

750

1000 1250

Vout_UV_buck2_LP_33

Output undervoltage threshold

monitor in LP mode

Vout = 3.3 V

2.8

2.9

3.05

Vout_UV_buck2_LP_5

Output undervoltage threshold

monitor in LP mode

Vout = 5 V

4.15

4.35

4.65

Vout_UV_buck2_LP_65

Output undervoltage threshold

monitor in LP mode

Vout = 6.5 V

5.45

5.65

5.85

Vout_OV_buck2_LP_33

Output overvoltage threshold

monitor in LP mode

Vout = 3.3 V

3.55

3.7

3.8

Vout_OV_buck2_LP_5

Output overvoltage threshold

monitor in LP mode

Vout = 5 V

5.4

5.65

5.85

Vout_OV_buck2_LP_65

Output overvoltage threshold

monitor in LP mode

Vout = 6.5 V

6.9

7.2

7.5

RDSON_HS_buck2_LP_25 HS switch ON resistance at 0.1 A

VIN12 = 14 V

Tj = 25 °C

0.72

0.9

Ω

RDSON_HS_buck2_LP_130 HS switch ON resistance at 0.1 A

VIN12 = 14 V

Tj = 130 °C

1.3

Ω

RDSON_LS_buck2_LP_25 LS switch ON resistance at 0.1 A

VIN12 = 14 V

Tj = 25 °C

0.25

0.3

Ω

RDSON_LS_buck2_LP_130 LS switch ON resistance at 0.1 A

VIN12 = 14 V

Tj = 130 °C

0.4

Ω

SPSB100

Electrical characteristics

DS14640 - Rev 1

page 79/214

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