L7292D datasheet(4/60 Pages) STMICROELECTRONICS

Part #	L7292D

Description	Five buck regulators power management unit

Download	60 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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4 / 60 page

Contents

L7292

4/60

DocID028601 Rev 1

9.2.19

REGCTRL.YYYxDIS - PSRx/LDO disable . . . . . . . . . . . . . . . . . . . . . . 36

9.2.20

SETCTRL.BUSY - busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.2.21

SETCTRL.SDI - setting data integrity . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.2.22

SETCTRL.CMD - command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.2.23

STATUS.YYYxFL - fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

10

EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

EEPROM description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

11

Buck regulator description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

11.1

MOD selection - pin MODA, MODB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

11.2

VOUT selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

11.3

Regulator sequence programmability . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

11.4

Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

11.5

PWM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

11.6

PFM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11.7

Forced PWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11.8

Current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11.9

Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11.10 Deep sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11.11 Forced pull-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

11.12 Voltage monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

11.13 Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

11.14 Fault summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

12

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

12.1

VQFN 5 x 5 x 0.9 40L package information . . . . . . . . . . . . . . . . . . . . . . . 49

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