L9924L datasheet(44/84 Pages) STMICROELECTRONICS

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Electrical specifications

L9924L

44/84

DocID028840 Rev 3

Charge pump must be switched on only in high side configurations because:



a charge pump in off-state (default) asserts a charge pump low output fault condition



the charge pump low output fault disables GATE pin driver (i.e. Field Power MOS is

kept off)

Charge pump can be kept switched off in low side configurations. The charge pump

generator tail current ICP,TAIL can be selected via SPI register 0x03 among the following

typical values:



128 mA (Default)



77 mA



96 mA



45 mA

4.3.20

5-V (VDD) voltage regulator

The device contains a fully protected low drop voltage regulator designed for fast transient

response.

The voltage regulator provides a 5-V stable VDD supply voltage at VDD/VDD_CAP pins and

up to 50 mA continuous load current to supply the µC. In addition the 5-V regulator drives

the internal 5-V loads as I/O structures. The VDD voltage regulator is protected against

overload and over-temperature. The output voltage precision is ±2% (incl. temperature drift

and line-/load regulation) for the whole output current operating range; the output voltage is

stable for ceramic load capacitors greater than CVDD= 680 nF (typ. ±10%) close to the

device VDD_CAP pin.

4fCP

Charge pump oscillator

clock frequency

No wobbling

800

kHz

5tCP,LOW

Charge-pump-low filter

time

Digital filter time

μs

6ICP,TAIL

Charge pump tail

current

Reg(0x03<13:12>)

= b00 → 128mA

(default)

128

Table 28. Charge pump output electrical characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Table 29. 5-V (VDD) voltage regulator electrical characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

1VDD

Output voltage

V(A+/B+) > 6V

-50 mA ≤ I(VDD_CAP) ≤ 0 mA

-5.0

εVDD

Output voltage

tolerance

V(A+/B+) > 6 V

-50 mA ≤ I(VDD_CAP) ≤ 0 mA

-3.8

+3.8

3CVDD

Compensation

capacitor

CVDD to be connected as close as

possible to VDD_CAP pin

612

680

1000

4IVDD

Output current

Max continuous load current

-50

5IVDDinrush

Inrush current

capability

V(A+/B+) > 6 V

V(VDD_CAP) > VRTL

-50

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