STM32L552CCT3PTR datasheet(146/340 Pages) STMICROELECTRONICS

146 / 340 page

Electrical characteristics

STM32L552xx

146/340

DS12737 Rev 6

5.3.2

SMPS step-down converter

The device embeds an SMPS step down converter which requires the external components

shown in below figure.

Figure 31. External components for SMPS step down converter

The following table summarizes the SMPS behavior depending on the main regulator range,

VDD and consumption.

Ambient temperature for

the suffix 6 version

Maximum power

dissipation

–40

°C

Low-power dissipation(6)

–40

105

Ambient temperature for

the suffix 3 version

Maximum power

dissipation

–40

125

Low-power dissipation(6)

–40

130

Junction temperature range

Suffix 6 version

–40

105

°C

Suffix 3 version

–40

130

1. When RESET is released functionality is guaranteed down to VBOR0 Min.

2. For Flash erase and program operation, VDD12 min must be 1.08 V.

3. This formula has to be applied only on the power supplies related to the IO structure described by the pin

definition table. Maximum I/O input voltage is the smallest value between MIN(VDD, VDDA, VDDIO2,

VDDUSB)+3.6 V and 5.5V.

4. For operation with voltage higher than Min (VDD, VDDA, VDDIO2, VDDUSB) +0.3 V, the internal Pull-up and

Pull-Down resistors must be disabled.

5. If TA is lower, higher PD values are allowed as long as TJ does not exceed TJmax (see Section 7.7: Thermal

characteristics).

6. In low-power dissipation state, TA can be extended to this range as long as TJ does not exceed TJmax (see

Section 7.7: Thermal characteristics).

Table 27. General operating conditions (continued)

Symbol

Parameter

Conditions

Min

Max

Unit

MSv62972V2

VDD

VDDSMPS

VLXSMPS

2 x V15SMPS

VSSSMPS

L = 4.7 μH typ

SMPS

C = 4.7 μF typ

VCORE

Regulator

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