ST EVAL-L9001 Bedienungsanleitung

Introduction

EVAL-L9001 is a low cost tool designed to evaluate L9001, a smart power device designed by STMicroelectronics in advanced

BCD technology.

L9001 Simple Power Supply (SPS) device is a multiple output power regulator for automotive applications with one buck

regulator, one configurable buck or linear regulator and one linear regulator. Its output voltages are configurable via discrete

pins.

On top of the regulators, this device integrates a watchdog functional block, and a diagnosis functional block (under/over

voltage, output current and temperature).

Device is capable of low power operation mode with main regulators still active and reduced power consumption from battery.

EVAL-L9001 embeds a typical configuration for SPC5x microcontroller family supplying:

• Buck 5 V output for peripheral supply

• Buck 1.2 V output for core supply

• LDO 5 V output for ADC reference supply

The expansion connector allows to monitor the different diagnostic reset signal, to enable the regulator and, if activated, to

service the windows watchdog.

EVAL-L9001 evaluation board

UM2598

User manual

UM2598 - Rev 1 - June 2019

For further information contact your local STMicroelectronics sales office.

www.st.com

1Hardware description

EVAL-L9001 is intended as low cost tool with pre-defined configuration that exemplify a typical application of

L9001 as power supply for SPC5x family microcontroller. An optimized BOM for the proposed configuration has

been analyzed:

• All components are automotive grade (AEC-Q100)

• Dimensioning have been made taking into account the real application range and cost

Here below the main electrical characteristic of EVAL-L9001:

• Operative input voltage: 5.5 V – 18 V

• Output voltage in normal mode:

– VDD1 = 5 V ± 3%, 1 A

– VDD2 = 1.2 V ± 3%, 1 A

– VADC = 5 V ± 2%, 100 mA

• WD windows length: 40 ms ± 10%

• Wake input

• Standby input

• Reset signals on expansion connector

• Independent WD reset output

• Terminal available for wire soldering

• 50 x 50 mm 2 layers PCB

1.1 Block diagram

Figure 1. EVAL-L9001 block diagram

VDD1 reset

WDT

WAKE

Thermal reset

BATT 5.5 -18V

BATT

WDI

STBY

WDO

5V 1A

5V 0.1A

VDD1

Buck

LDO

logic

VADC

VDD2

Buck

Control

VADC reset

VDD2 reset

1.2V 1A

UM2598

Hardware description

UM2598 - Rev 1 page 2/15

2L9001 block diagram

Figure 2. L9001 block diagram

VDDIO

VADC

ADCLDO

3.3V / 5.0V

100 mA

CONF3

WDI

WDT

GND (EP)

WAKE

VDD1 regulator

3,3V, 5V, 6V

V1O

VR1

VDD2 regulator

0,8V...5V

Buck2

LDO2

300mA

V20

FB2

L9001

GND

RSTN2

CONF2

RSTN1

WDO

TWN

STBY

CP1 CP2 CP

VR2

CONF1

CONF1 = 0  VADC = 3,3V

CONF1 = Z  fail

CONF1 = 1  VADC = 5,0V

CONF3 = 0  VDD1 = 3,3V

CONF3 = Z  VDD1 = 5V

CONF3 = 1  VDD1 = 6V

ADCMON

CONF2 = 0  Buck 2 active

CONF2 = Z  fail

CONF2 = 1  LDO2 active

Diagnosis

Configuration

Voltage

monitor

Charge Pump

Stop

mode

Watchdog

Logic

Voltage

Monitor

Voltage

Monitor

Voltage

Monitor

bypass

GADG3103170733PS

UM2598

L9001 block diagram

UM2598 - Rev 1 page 3/15

3L9001 pin connection and description

Figure 3. L9001 pins connection diagram (top view)

V1O

WAKE

CONF3

RSTN2

VDDIO

RSTN1

ADCMON WDT

STBY

WDI

VADC

TWN

CONF2

CONF1

VR2

FB210

GND WDO

CP1

CP2 VR1

V2O

GADG3103170817PS

Table 1. L9001 pin description

Pin Number Pin Name Description Class I/O Type

EP GND Exposed pad: connected to GND Supply Global

1 GND Power GND Supply Global

2 ADCMON ADCLDO monitor (reset) O Local

3 RSTN1 VDD1 monitor (reset) O Local

4 RSTN2 VDD2 monitor (reset) O Local

5 VDDIO Input voltage reference Supply Local

6 CONF3 Configuration input 3 I Local

7 WAKE Wake-up input I Local

8 V1O VDD1 switching pin Supply Local

9 VS Battery supply voltage Supply Global

10 CP Charge pump output Supply Local

11 CP2 Charge pump capacitor pin 2 Supply Local

12 CP1 Charge pump capacitor pin 1 Supply Local

13 V2O BUCK2 switching pin/LDO2 output voltage Supply Local

14 VR1 VDD1 BYP output voltage /VDD2 supply pin Supply Global

15 FB2 VDD2 feedback voltage pin I Local

16 VR2 VDD2 BYP output voltage Supply Local

17 CONF1 Configuration input 1 I Local

18 CONF2 Configuration input 2 I Local

19 VADC ADCLDO output voltage Supply Global

20 TWN Thermal warning output flag O Local

21 WDI Watchdog input I Local

22 STBY Stand-by input I Local

23 WDT Watchdog timer input I/O Local

24 WDO Watchdog error flag output O Local

UM2598

L9001 pin connection and description

UM2598 - Rev 1 page 4/15

4Board layout

Figure 4. TOP layer

Figure 5. BOTTOM layer

UM2598

Board layout

UM2598 - Rev 1 page 5/15

Figure 6. Assembly TOP

UM2598

Board layout

UM2598 - Rev 1 page 6/15

5Main components and connectors

Figure 7. Components and connectors details

UM2598

Main components and connectors

UM2598 - Rev 1 page 7/15

6Jumpers and connectors

Table 2. Jumpers

Name Description Type

J1 Expansion connector (Enable signal, Reset signals,

Watchdog) Multi-pin connector

J2 Main battery positive connector (VB) Terminal

J3 VADC GND connector Terminal

J4 Watchdog disable

Solder jumper:

Closed (default) = Watchdog disabled

Open = Watchdog enabled

J5 VADC positive connector Terminal

J6 VDD1 positive connector Terminal

J7 VDD1 GND connector Terminal

J8 Main battery GND connector Terminal

J9 VDD2 GND connector Terminal

J10 VDD2 positive connector Terminal

Table 3. Expansion connector

Pin Description

1 ADCMON: VADC monitor flag (reset)

2 RSTN1: VDD1 monitor flag (reset)

3 RSTN2: VDD2 monitor flag (reset)

4 WAKE_EXT : Wake-up pin (to be > 3.25 V to enable power supply)

5WDO: Watchdog output (output is driven low

in case of watchdog fault)

STBY: Standby input (The state can be entered by ACTIVE state by rising STBY pin. Depending on the

active VDD regulators (i.e. the regulators which have not been disabled in the application), the low power

mode is managed in a different way). Please refer to L9001 Datasheet for further information

7 WDI: Windows watchdog input. Please refer to L9001 Datasheet for further information

8 TWN: Thermal warning flag output

9 GND : Ground

UM2598

Jumpers and connectors

UM2598 - Rev 1 page 8/15

7Functional description

7.1 Default jumper setting

Table 4. Jumper configuration

Name Description Configuration

J4 Watchdog disable Soldered

7.2 Getting started

Make sure jumper [J4] is closed:

Figure 8. Jumper J4 detail

Step 1. Connect power supply positive output to [J2] and ground to [J8].

Step 2. Configure the power supply to 13.5 V and limit the current to 3 A

Step 3. Switch on the power supply

Step 4. Connect the Wake_ext ( pin 4 of expansion connector) to a voltage > 3.25 V

Step 5. Use a multimeter, in voltage measurement setting, to measure following voltages:

– 5 V between [J6 (+)] and [J7 (-)]

– 1.2 V between [J10 (+)] and [J9 (-)]

– 5 V between [J5 (+)] and [J3 (-)]

UM2598

Functional description

UM2598 - Rev 1 page 9/15

8EVAL-L9001 board schematic

Figure 9. Board schematic

ADCMON

RSTN1

RSTN2

CONF3

CP1

CP2

FB2

TWN

WDI

STBY

WDT

WDO

GND

1VDD2

GND

VADC

Keep this loop short

close to the pin.

Keep this loop short

close to the pin.

VB BOOT

47uF/50V

GND

Imax = 3,5A

GND

Use many vias over the GND planes

to freeze each other

220nF/20V

68nF/20V

BOOT

CP2

CP1

CP2

CP1

Imax = 100mA Imax = 100mA

GND

Imax = 3,5A

GND

Imax = 3,5A

10k/0,5%

FB21

FB2

GND

Close to chip GND pin

R20 1k

R10

1k C9

100nF/40V

GND

WAKE

C11

47nF

GND

WDT

CONF1

CONF2

GND

R22 1k

WDI

R13

20k/0,5%

BOOT

1uF

R15 10k

VDD1

4,7uF/50V

22uF/25V

47uF/16V

VADC

GND

RSTN2

VDDIO

ADCMON

RSTN1

CONF3

WAKE

V1O

CP2

CP1

12 V2O 13

VR1 14

FB2 15

VR2 16

CONF1 17

CONF2 18

WDO 24

WDT 23

STBY 22

WDI 21

TWN 20

VADC 19

EX-PAD

L9001

GND

VDD1

VDD2

J10

VDD2

V2O

V1O

VDD1

VDD2

CONF3

VDDIO

4.7k

VDDIO

4.7k

VDDIO

4.7k

VDDIO

V1O

VDDIO

VADC

ADCMON

RSTN1

RSTN2

WAKE_EXT

VDDIO

STBY

V2O

V1O

STPS340B-TR

STPS3L60SY

10uH/4.9A

10uH/2.6A

22uH/4.6A

GND

4,7uF/50V

GND_ADC

GND

GNDD1 1

GNDD2

CON9

GND

UM2598 - Rev 1 page 10/15

UM2598

EVAL-L9001 board schematic

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