L5953_07 datasheet(6/31 Pages) STMICROELECTRONICS

6 / 31 page

Block diagram and electrical specifications

L5953

6/31

Block diagram and electrical specifications

Figure 1.

Block diagram

Table 2.

Absolute maximum ratings

Symbol

Parameter

Value

Unit

VDD

DC operating supply voltage

-0.6 to 30

Transient supply over voltage (250ms)

VSPI

Supply voltage for SPI I/O

-0.6 to 6

Voltage regulator output current

Internally limited

Vinlog

Input voltage (C, D, Q, S, SYNC)

0 to 6

RESR

Output capacitor series e.g. resistance

(linear reg.) (allowed range)

From 0.2 to 10

Top

Operating temperature range

-40 to 85

°C

Tstg

Storage temperature ranges

-55 to 150

°C

Operative junction temperature

-40 to 150

°C

Table 3.

Thermal data

Symbol

Parameter

Value

Unit

Rthj-case

Thermal resistance junction to case

1.7

°C/W

VOLTAGE WARNING

SPI INTERFACE

REC2

LINEAR VOLTAGE

REGULATOR

1.5-3.3V/300mA

HSD1

HSD2

COMP

GATEOUT

GATEIN

VSW

DRAINOUT

STRAP

ADJ

VSTBY

GND

SWGND

VDD-LIN

REC1

ST-BY LINEAR VOLTAGE

REGULATOR

3.3-5V/250mA

PWM

STEP DOWN

REGULATOR

2.5-10V/1A

OSCILLATOR &

SYNC

STCAP

RES

VDD-SW

IRQ

VLR

FBLR

VIN

SYNC

VSPI

DGND

FGND

D01AU1330A

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