L9788 datasheet(79/264 Pages) STMICROELECTRONICS

79 / 264 page

DS12308 Rev 4

79/264

L9788

Multi-voltage regulator supplies

263

When VB_IN is higher than 3.1 V (Voff_vb_in), the starter relay and MRD can hold the state.

VB_IN_SW pin is the dedicated supply pin for pre-buck regulator.

Note:

VB_IN_SW must be shorted to VB_IN in PCB layout.

Conditions:

4.8 V ≤ VB_IN ≤ 18 V; Tj -40 to 175° C unless otherwise specified;

6.8

Charge pump

Charge pump provides a permanent voltage of at least 4.8 V above VB_IN when VB_IN is

higher than 5.5 V, the VDD5 linear regulator, H-side switch and so on.

Once VB_IN overvoltage is detected (VB_IN > VOV_VB_IN_H for t>tVBOV2), the charge

pump will be switched off automatically.

Charge pump can provide voltage of 4V above VB_IN when VB_IN in low power condition

(3.1V<VB_IN<5.5V)

This charge pump is for internal use only.

Note:

It is forbidden to use this charge pump pin for external load.

Figure 27. Power up charge pump behavior

Table 38. VB_IN_SW electrical characteristics

Symbol

Parameter

Test

Condition

Min

Typ

Max

Unit

IVB_IN_sw_STBY VB_IN_SW current in OFF state.

µA

VB_IN_SW

GADG0112160905PS

KEY_IN

WK_IN_DET

WAKE_UP_EOT_DET

WAKE_UP_CAN_DET

MRD out

VB_IN / V_CP

Power On Reset

VPRE

CHARGE PUMP during Power Up

not permanent battery

Key_Tfilter

UV_VB_CP_OFF

UV_VB_IN

VB_IN

KEY_IN

WK_IN_DET

WAKE_UP_EOT_DET

WAKE_UP_CAN_DET

MRD out

VB_IN / V_CP

Power On Reset

VPRE

CHARGE PUMP during Power Up

permanent battery

Key_Tfilter

VB_IN

L9788 Datasheet(PDF) 79 Page - STMicroelectronics

L9788 Datasheet(HTML) 79 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL