STPM098C datasheet(12/110 Pages) STMICROELECTRONICS

12 / 110 page

Table 7. VCC monitor electrical characteristic

Symbol

Parameter

Test

condition

Min Typ Max Unit

Notes

VCC_uv_th

VCC undervoltage threshold

4.19 4.4

Comparator output low to high

VCC_uv_hys

VCC undervoltage hysteresis

120 180

VCC_ov_th

VCC overvoltage threshold

5.3

5.5

5.7

Comparator output Low to high

VCC_ov_hys

VCC overvoltage hysteresis

125

T_vcc_uv_flt

VCC undervoltage

Digital filter

T_vcc_ov_flt

VCC overvoltage

Digital filter

T_apor_ltoh_flt POR ANA Low to high state filter time

3.5

5.5

7.5

μs

Analog filter

T_apor_htol_flt POR ANA high to Low state filter time

μs

Analog filter

Figure 6. VCC power supply operative range

VCC

VCC_OV

(internal signal)

VCC_UV

(internal signal)

VCC_OV_TH

TPOR_LTOH_flt

OPERATIVE

VCC_UV_TH

VCC_OV_HYS

VCC_UV_HYS

TPOR_HTOL_flt

≈2.5V

POR_ANA

SHUTDOWN

OPERATIVE

TPOR_LTOH_flt

TPOR_HTOL_flt

TVCC_OV_flt

TVCC_UV_flt

Note:

1. 0 V ≤ VCC ≤ 2.5 V(1)

STPM098C is shut down. Internal reference voltage/currents levels are shut down. Internal registers are

under reset.

2. 2.5 V ≤ VCC ≤ VCC_uv_th(Max) + VCC_uv_hyst (max)

VCC is in undervoltage and SAFE_HIZ is established. Internal reference voltage/currents levels are

degraded. Internal registers are out of reset.

3. VCC_uv_th ≤ VCC ≤ VCC_ov_th

Internal supply and reference voltage/currents are available. Internal registers are out of reset (if no LTC

faults are detected the device status depends on VR1_EN/VR2_EN status).

4. VCC_ov_th ≤ VCC

VCC is in overvoltage and SAFE_HIZ is established. The internal supply and reference voltage/currents are

available and possibly degraded. Internal registers are out of reset.

1. Indicative value. Not covered by production test or guaranteed by design. In operative conditions VCC is supposed to be

within the operating range or at 0 V; values in between are supposed to be applied only during power-up/down transients

for an interval based on VCC slew rate requirements.

STPM098C

Functional description

DS14440 - Rev 1

page 12/110

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