L5963Q-V0Y datasheet, PDF - EEWORLD Datasheet

L5963Q-V0Y: DescriptionBuck Regulator with LDO to Automotive 48-Pin VQFPN EP Tray; File Size531KB，49 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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L5963Q-V0Y Overview

Buck Regulator with LDO to Automotive 48-Pin VQFPN EP Tray

L5963Q-V0Y Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
Function	Buck Regulator with LDO
Switching Frequency (kHz)	250 to 2000
Input Voltage (V)	3.5 to 26
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	105
Packaging	Tray
Maximum Storage Temperature (°C)	150
Minimum Storage Temperature (°C)	-55
Supplier Package	VQFPN EP
Pin Count	48
Mounting	Surface Mount
Package Height	1(Max)
Package Length	7
Package Width	7
PCB changed	48

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L5963

Automotive dual monolithic switching regulator with LDO and HSD

Datasheet

production data

PowerSSO-36

(exposed pad)

PowerSSO-36

(slug-up)

VQFPN-48



Independent current limit on all regulators



Extremely low quiescent current in standby

conditions



Power good / adjustable voltage detector

outputs to realize customized power up/down

sequences

Featuress



AEC-Q100 qualified



Two step-down synchronous switching voltage

regulators with internal power switches:

– Wide input voltage range (from 3.5 V to 26 V)

– Internal high-side/ low-side NDMOS

– 1 V minimum output

– 3.0 A load current

– 250 kHz free-run frequency

– 250 kHz < f < 2 MHz synchronization range

– Integrated soft-start

– Independent hardware enable pins

– Independent power supply

– 180° PWM output phase shift

– Programmable switching frequency divider

by 1, 2, 4 or 8 between the two DC/DC

regulators

– Power good function



One standby / linear regulator

– Output voltage programmable with external

resistor divider

– 250 mA maximum current capability

– Backup function

– Power good function



One high side driver

– 0.5 V max drop @ 0.5 A

– Protected against short to ground and

battery, loss of ground and battery,

unsupplied short to battery



Programmable under voltage battery detector

– Under voltage threshold adjustable through

dedicated pin (VDIN)



Load dump protection



Independent thermal protection on all

regulators

June 2017

This is information on a product in full production.

Description

L5963 is a dual step-down switching regulator

with internal power switches, high side driver and

a low drop-out linear regulator that can operate as

standby regulator or normal LDO.

All the regulators can be connected directly to the

vehicle battery. In addition to an adjustable

voltage detector, voltage supervisors are

available.

The two DC-DC converters can work in free-run

condition or synchronize themselves to an

external clock. DC/DCs' PWM outputs have a

180° phase shift.

The high operating frequency allowed by the

synchronization input helps to reduce AM and FM

interferences and grants the use of small and low

cost inductors and capacitors.

This IC finds application in the automotive

segment, where load dump protection and wide

input voltage range are mandatory.

A slug-up package option is available for

applications which require heatsink use.

In standby condition the device guarantees

extremely low quiescent current (25

μA

typical @

-40 °C < T < 85 °C)

Table 1. Device summary

Order code

L5963DN-EHX

L5963DN-EHT

L5963U-KBX

L5963U-KBT

L5963Q-V0Y

L5963Q-V0T

Package

PowerSSO36

(exposed pad)

PowerSSO36

(slug-up)

VQFPN-48

Packing

Tube

Tape & Reel

Tube

Tape & Reel

Tray

Tape & Reel

DocID028553 Rev 3

1/49

www.st.com

Contents

L5963

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1

5.2

5.3

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.1

6.2

Operative modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Blocks functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

6.2.6

6.2.7

6.2.8

6.2.9

6.2.10

6.2.11

6.2.12

Unregulated supply input voltage (VINLDO) . . . . . . . . . . . . . . . . . . . . . 19

Low voltage warning monitor (related pins: VDIN, VDOUT, VDDLY) . . . 19

Power-good reset (related pins: LDOOK, LDOOKDLY) . . . . . . . . . . . . . 20

Power-good function of DC/DC1 (related pins: SW1OK, SW1OKDLY) . 20

Over voltage shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Power ground (PGND1 and PGND2) . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Signal ground (SGND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

PWM signal ground (SWGND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

TAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Linear regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

High-side driver (HSD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Switching regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.1

7.2

7.3

7.4

Output inductor (Lo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Output capacitors (COUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Input capacitors (C

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Bootstrap capacitor (CBOOT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2/49

DocID028553 Rev 3

L5963

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Figure 20.

Figure 21.

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Example of a typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Example of usage of two regulators in the same application . . . . . . . . . . . . . . . . . . . . . . . . 9

PowerSSO-36 pinout configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

VQFPN-48 pinout configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

PSRR LDO 50 mA load vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Efficiency vs. output current (VIN = 14 V, fsw = 2 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Efficiency vs. output current (VIN = 14 V, fsw = 250 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . 18

Low voltage warning monitor & delay schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Linear regulator diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Enable timing for standby regulator (ENLDO pin connect to supply directly) . . . . . . . . . . . 22

Enable timing for linear regulator (pin ENLDO isn't connected to VINLDO) . . . . . . . . . . . . 23

Switching regulators diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Closed loop system with TYPE III network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

TYPE III compensated network diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

PowerSSO-36 (exposed pad) package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

PowerSSO-36 (slug-up) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

VFQFPN-48 (7x7x1.0 - opt. D) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

PowerSSO-36 (exp. pad) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

PowerSSO-36 (slug up) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

VFQFPN-48 (7x7x1.0) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

DocID028553 Rev 3

5/49

L5963Q-V0Y Related Products

	L5963Q-V0Y	L5963Q-V0T
Description	Buck Regulator with LDO to Automotive 48-Pin VQFPN EP Tray	Buck Regulator with LDO to Automotive 48-Pin VFQFPN T/R

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