loading

Automotive CIS/CCM PMIC for Ultra Compact Camera and High Image Quality System

EVB_RTQ2072BAGQVT-QT

Share
ACTIVE

The Evaluation Board demonstrates the RTQ2072BAGQVT-QT-11 to be designed with three step down converters and one high PSRR low-dropout (LDO) regulator for automotive camera applications. The high-voltage step down converter is operated with input voltage range up to 18.5V for Power Over Coax (POC) connection. Two low-voltage step down converters provide constant output voltage. All step down converters operate in a forced fixed-frequency PWM mode. The LDO output voltage is easily set via an external resistor. The RTQ2072B provides 10 power sequences by a resistor on SEQ pin for flexibility.

General Description

The Evaluation Board demonstrates the RTQ2072BAGQVT-QT-11 to be designed with three step down converters and one high PSRR low-dropout (LDO) regulator for automotive camera applications. The high-voltage step down converter is operated with input voltage range up to 18.5V for Power Over Coax (POC) connection. Two low-voltage step down converters provide constant output voltage. All step down converters operate in a forced fixed-frequency PWM mode. The LDO output voltage is easily set via an external resistor. The RTQ2072B provides 10 power sequences by a resistor on SEQ pin for flexibility.



Performance Specification Summary

Summary of the RTQ2072B Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C.


Table 1. RTQ2072B Evaluation Board Performance Specification Summary

Specification

Test Conditions

Min

Typ

Max

Unit

Input Voltage Range

4

--

18.5

V

Buck1 Output Current

2

--

--

A

Buck2 Output Current

1.5

--

--

A

Buck3 Output Current

0.75

--

--

A

LDO Output Current

300

--

--

mA

Buck1 Default Output Voltage

--

3.6

--

V

Buck2 Default Output Voltage

--

1.1

--

V

Buck3 Default Output Voltage

--

1.8

--

V

LDO Default Output Voltage

--

3.3

--

V

Buck Operation Frequency

--

2.1

--

MHz

Buck1 Ripple Voltage

VIN = 6V, VOUT = 3.6V, one switching cycle

--

20

--

mVpp

Buck2 Ripple Voltage

VIN = 3.6V, VOUT = 1.1V, one switching cycle

--

10

--

mVpp

Buck3 Ripple Voltage

VIN =3.6V, VOUT = 1.8V, one switching cycle

--

10

--

mVpp

Buck1 Load Transient Response

VIN = 6V, VOUT = 3.6V, IOUT = 10mA to 500mA, 1µs

--

±150

--

mV

Buck2 Load Transient Response

VIN = 3.6V, VOUT = 1.1V, IOUT = 10mA to 500mA, 1µs

--

±50

--

mV

Buck3 Load Transient Response

VIN = 3.6V, VOUT = 1.8V, IOUT = 10mA to 300mA, 1µs

--

±50

--

mV

LDO Load Transient Response

VIN = 3.6V, VOUT = 3.3V, IOUT = 10mA to 200mA, 1µs

--

±25

--

mV



Power-up Procedure

Suggestion Required Equipments

  • RTQ2072B Evaluation Board
  • DC power supply capable of at least 20V and 2A (depends on application)
  • Electronic load capable of 2A (depends on application)
  • Function Generator
  • Oscilloscope

Quick Start Procedures

The Evaluation Board is fully assembled and tested. Follow below steps to verify board operation. Do not turn on supplies until all connections are made. When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor.

Follow below procedure for proper setup of measurement and EVB operation.

1) With power off state, connect the input power supply to VIN and GND pins.

2) With power off state, connect the electronic load between the VOUT and nearest GND pins.

3) Turn on the power supply at the input. Make sure that the input voltage does not exceeds 24VAMR on the Evaluation Board.

4) Check for the proper output voltage using a voltmeter.

5) Once the proper output voltage is established, adjust the load within the operating ranges and observe the output voltage regulation, ripple voltage, efficiency and other performance.



Detailed Description of Hardware

Headers Description and Placement

一張含有 文字, 電子產品, 電路, 螢幕擷取畫面 的圖片

自動產生的描述

Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at evb_service@richtek.com.


Test Points

The EVB is provided with the test points and pin names listed in the below table.

Test Point/

Pin Name

Function

VIN

Input voltage.

VBUCK1

BUCK1 output voltage.

VBUCK2

BUCK2 output voltage.

VBUCK3

BUCK3 output voltage.

LDOOUT

LDO output voltage.

VEXT

Additional BUCK2, BUCK3 and LDO input voltage.

VCC

Additional pull high voltage for PG indication.

JP1

PG pull high voltage supplied by VCC if short connection. Deafult is non-connected.

JP2

PG pull high voltage supplied by BUCK3 if short connection. Deafult is connected.

CP4

BUCK2/BUCK3 input voltage supplied by BUCK1 if short connection. Deafult is connected.

CP5

BUCK2/BUCK3 input voltage supplied by VEXT if short connection. Deafult is non-connected.

CP9

LDO input voltage supplied by VEXT if short connection. Deafult is non-connected.

CP10

LDO input voltage supplied by BUCK1 if short connection. Deafult is connected.

GND

Ground.

PG

Power-good indication test point.



Bill of Materials

Reference

Count

Part Number

Description

Package

Manufacturer

U1

1

RTQ2072BAGQVT-QT-11

PMIC

WETD-VQFN-16L 3x3

RICHTEK

C1

1

GCJ31CR71E475KA12

4.7µF/25V/X7R

1206

MURATA

C2

1

GRT188C81C475KE13

4.7µF/16V/X6S

0603

MURATA

C3

1

GRT155R71C104KE01

0.1µF/16V/X7R

0402

MURATA

C4, C5, C6

3

GRT188C81A106ME13

10µF/10V/X6S

0603

MURATA

C7

1

GRT155C81A105KE01

1µF/10V/X6S

0402

MURATA

C8, C9

2

GRT155C81A225KE13

2.2µF/10V/X6S

0402

MURATA

L1

1

TFM201610ALMA1R5MTAA

1.5µH

0806

TDK

L2, L3

2

TFM201610ALMA1R0MTAA

1µH

0806

TDK

R1

1

MR02X1372FAL

13.7k

0201

WALSIN

R2

1

MR02X3921FAL

3.92k

0201

WALSIN

R6, R7

2

MR02X000 PAL

0

0201

WALSIN

R8

1

MR02X1002FAL

10k

0201

WALSIN



Typical Applications

EVB Schematic Diagram

Technical Document Image Preview

1. The capacitance of the input and output capacitors will influence the input and output voltage ripple.

2. MLCC capacitors have degrading capacitance at DC bias voltage and temperature. Especially, smaller size MLCC capacitors will have much lower capacitance.


Measure Result

BUCK1 Efficiency

BUCK1 Load Regulation

Technical Document Image Preview

Technical Document Image Preview

BUCK2 Efficiency

BUCK2 Load Regulation

Technical Document Image Preview

Technical Document Image Preview

BUCK3 Efficiency

BUCK3 Load Regulation

Technical Document Image Preview

Technical Document Image Preview

LDO Load Regulation

LDO Dropout Voltage

Technical Document Image Preview

Technical Document Image Preview

LDO PSRR

LDO Output Noise

Technical Document Image Preview

Technical Document Image Preview

Power-On

Power-Off

Technical Document Image Preview

Technical Document Image Preview

Note: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the output capacitor.



Evaluation Board Layout

Figure 1 to Figure 4 are RTQ2072BAGQVT-QT Evaluation Board layout. This board size is 70mm x 50mm and is constructed on four-layer PCB with 2 oz. Cu.

一張含有 文字, 螢幕擷取畫面, 圖表, 地圖 的圖片

自動產生的描述

Figure 1. Top View (1st layer)


一張含有 螢幕擷取畫面, 文字, 圖表 的圖片

自動產生的描述

Figure 2. PCB Layout—Inner Side (2nd Layer)


一張含有 螢幕擷取畫面, 圖表 的圖片

自動產生的描述

Figure 3. PCB Layout—Inner Side (3rd Layer)


一張含有 螢幕擷取畫面, 圖表 的圖片

自動產生的描述

Figure 4. Bottom View (4th Layer)

Title Last Update Share Download
Evaluation Board User Guide 2023/09/18
Bill of Materials 2023/09/18
Schematic 2023/09/18
Gerber File 2023/09/18
RTQ2072-QT
RTQ2072-QT

The RTQ2072 is an integrated PMIC with three step down converters and one high PSRR low-dropout (LDO) regulator for automotive camera applications. The high-voltage step down converter is operated with input voltage range up to 18.5V for Power Over Coax (POC) connection. Two low-voltage step down converters provide constant output voltage. All step down converters operate in a forced fixed-frequency PWM mode. The LDO output voltage is easily set via an external resistor. The RTQ2072 provides 10 power sequences by a resistor for flexibility. The RTQ2072 is available in a WETD-VQFN-16L 3x3 package with dimple lead type wettable flanks.

Part NumberDistributorStockBuy From Authorized Distributor
EVB_RTQ2072BAGQVT-QT Digikey 1 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
TOP