MAX20404 [MAXIM]

Output Voltage: 3.3V/5V Fixed and Adjustable from 0.8 to 10V;


型号：	MAX20404
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Output Voltage: 3.3V/5V Fixed and Adjustable from 0.8 to 10V
文件：	总7页 (文件大小：561K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Click here for production status of speciﬁc part numbers.

Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

General Description

Quick Start

The MAX20406 evaluation kit (EV kit) provides a proven

design to evaluate the MAX20406 automotive 2.1MHz

synchronous buck converter with 10µA quiescent current.

The standard EV kit PCB comes with a MAX20406AFOB/

VY+ (2.1MHz, 3.3V) installed, as well as various test

points and jumpers for evaluation. The EV kit output volt-

age is ﬁxed and easily conﬁgured with minimum compo-

nent changes. The default EV kit is designed to deliver

up to 6A with input voltage 3V to 36V. Output voltage

quality can be monitored by observing the PGOOD signal.

The MAX20406 EV kit can also be used to evaluate the

MAX20404 and MAX20405.

Required Equipment

● MAX20406 EV Kit

● 36V, 6A Power Supply (PS)

● Appropriate Resistive Load, or an Electronic Load

that can Sink 6A

● Digital Multimeter (DMM)

● Oscilloscope

Procedure

The EV kit comes fully assembled and tested. Follow the

steps below to verify board operation:

1) Verify that all jumpers are in their default positions, as

shown in Table 1.

Beneﬁts and Features

● Input Supply Range from 3V to 36V

2) Connectthepositiveandnegativeterminalsofthepow-

er supply to the VSUP_FILTER and GND test pads,

respectively.

● Output Voltage: 3.3V/5V Fixed and Adjustable from

0.8 to 10V

● Delivers up to 6A

3) Set the power-supply voltage to 14V and current limit

to 6A.

● Frequency - Synchronization Input

● Enable Input

4) Turn on the power supply.

● Spread Spectrum Available

● Voltage Monitoring PGOOD Output Available

● Proven PCB Layout

5) Using the DMM, verify the VOUT is approximately

3.3V.

6) Verify that the switching frequency is 2.1MHz

(approx.) by monitoring the inductor switching voltage

with the oscilloscope.

● Fully Assembled and Tested

Ordering Information appears at end of data sheet.

Additional Evaluation

7) Connect the positive and negative terminals of the

electronic load to VOUT and GND3, respectively.

8) Set the electronic load to the desired current at or

below 6A or use an equivalent resistive load with an

appropriate power rating.

9) Adjust current limit on the power supply as necessary.

10) Turn on the power supply and electronic load.

11) Verify that voltage across the VOUT and GND3 is 3.3V.

319-100435; Rev 3; 7/21

Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

Evaluating Other Variants

Detailed Description of Hardware

The EV kit comes installed with the 3.3V/2.1MHz, 6A vari-

ant (MAX20406AFOB/VY+). The other variants can be

installed with minimal component changes.

The MAX20406 EV kit provides a proven layout for

the MAX20406 synchronous buck regulator IC. The IC

accepts input voltages as high as 36V and delivers up to

6A. The EV kit can handle an input supply transient up to

42V. Various test points are included for evaluation.

Table 1. Default Jumper Settings

DEFAULT SHUNT

External Synchronization

JUMPER

FUNCTIONS

Buck enabled

POSITION

The IC can operate in two modes: forced-PWM (FPWM)

or skip mode. Skip mode has better efficiency for light-

load conditions. When SYNC is pulled low, the IC

operates in skip mode for light loads and PWM mode for

larger loads. When SYNC is pulled high, the IC is forced

to operate in PWM mode across all load conditions.

SYNC can be used to synchronize with other supplies if

a clock source is present. The IC is forced to operate in

FPWM mode when SYNC is connected to a clock source.

ENABLE

1–2

Forced-PWM mode

PGOOD TP pulled up to

bias

Installed

Ordering Information

PART

TYPE

MAX20406EVKIT#

EV Kit

Buck Output Monitoring (PGOOD)

#Denotes RoHS compliant.

The EV kit provides a power-good output test point

(PGOOD) to monitor the status of the buck output (OUT).

PGOOD is high impedance when the output is in regula-

tion. PGOOD is low impedance when the output voltage

drops below 7% (typ) of its nominal regulated voltage.

Programming Buck Output Voltage

The EV kit comes installed with MAX20406AFOB/

VY+, which can provide a fixed 3.3V output voltage

or an adjustable 0.8V-to-10V output voltage. To pro-

gram V

voltage, place appropriate resistors in

OUT

the positions R7 and R8 according to the following

equation:

R7 = R8 (V /V - 1)

OUT FB

Where typically V = 0.8V and R8 = 10k~100k.

Maxim Integrated

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Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

MAX20406 EV Kit Bill of Materials

PARTS COMMON TO ALL VARIANTS

REF_DES

BIAS, FBR, GND2, GNDS, GNDS1‐

GNDS3, PGOOD, SYNCOUT, VEA,

MFG PART #

MANUFACTURER

KEYSTONE

VALUE

N/A

DESCRIPTION

5012

TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD

HOLE=0.063IN; WHITE; PHOSPHOR BRONZE WIRE SILVER PLATE

FINISH;

CAP; SMT (1210); 10UF; 10%; 50V; X7S; CERAMIC

CAP; SMT (0603); 2200PF; 10%; 50V; X7R; CERAMIC;

CAP; SMT (CASE_G); 100UF; 20%; 50V; ALUMINUM‐ELECTROLYTIC

VSUPS

C1, C2

CGA6P3X7S1H106K250AB TDK

CGA3E2X7R1H222K080AD TDK

EEH‐ZA1H101P

10UF

2200PF

100UF

PANASONIC

C4, C5

C6, C9

C7, C8, C10, C17

C11

ENABLE, J1

CGA5L3X7R1H475K160AB TDK

4.7UF

1UF

0.1UF

2.2UF

CAP; SMT (1206); 4.7UF; 10%; 50V; X7R; CERAMIC

CAP; SMT (0603); 1UF; 10%; 50V; X5R; CERAMIC

CAP; SMT (0603); 0.1UF; 10%; 50V; X7R; CERAMIC

CAP; SMT (0603); 2.2UF; 10%; 16V; X7R; CERAMIC

UMK107BJ105KA

TAIYO YUDEN

CGA3E2X7R1H104K080AE TDK

GRM188Z71C225KE43

PEC03SAAN

MURATA

SULLINS

PEC03SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT;

3PINS

GND, GND3, VOUT, VSUP_FILTER

575‐4

KEYSTONE

SULLINS

575‐4

RECEPTACLE; JACK; BANANA; 0.203IN [5.2MM] DIA X 0.218IN

[5.5MM] L; 0.203D/0.218L; NICKEL PLATED BRASS

PEC02SAAN

BLM41PG600SH1

PEC02SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT;

2PINS

MURATA

INDUCTOR; SMT (1806); FERRITE‐BEAD; 60 IMPEDANCE AT 100MHz;

R4, R5

C16

ERA‐2AEB103

RC0402JR‐070RL

PANASONIC

YAGEO PHYCOMP

10K

RES; SMT (0402); 10K; 0.10%; +/‐25PPM/DEGK; 0.0630W

RES; SMT (0402); 0; 5%; JUMPER; 0.0630W

Do not install

R7, R8

Do not install

2.1MHz VARIANT

REF_DES

MFG PART #

XEL5030‐102

MANUFACTURER

COILCRAFT

VALUE

1UH

DESCRIPTION

INDUCTOR; SMT; 1UH

L2 (For

MAX20404/MAX20405/MAX20406)

C12, C15

C13, C14

CGA6P1X7R1C226M250AC TDK

22UF

CAP; SMT (1210); 22UF; 10%; 16V; X7R; CERAMIC

Do not install

3MHz VARIANT

REF_DES

MFG PART #

XEL5030‐102

XEL5020‐681

XEL4030‐901

CGA6P1X7R1C226M250AC TDK

CGA6P1X7R1E106K250AC TDK

MANUFACTURER

VALUE

1UH

0.68UH

0.9UH

22UF

10UF

DESCRIPTION

INDUCTOR; SMT; 1UH

INDUCTOR; SMT; 0.68UH

COILCRAFT

L2 (For MAX20406)

L2 (For MAX20404/MAX20405)

INDUCTOR; SMT; 0.9UH

C12

C15

C13, C14

CAP; SMT (1210); 22UF; 10%; 16V; X7R; CERAMIC

CAP; SMT (1210); 10UF; 10%; 25V; X7R; CERAMIC

Do not install

400kHz VARIANT

REF_DES

MFG PART #

XEL5030‐222

XEL6060‐472

XEL6060‐682

GRT32EC81C476KE13

MANUFACTURER

VALUE

DESCRIPTION

INDUCTOR; SMT; 2.2UH

INDUCTOR; SMT; 4.7UH

INDUCTOR; SMT; 6.8UH

CAP; SMT (1210); 47UF; 10%; 16V; X6S; CERAMIC

Do not install

COILCRAFT

MURATA

2.2UH

4.7UH

6.8UH

47UF

L2 (For MAX20406)

L2 (For MAX20404/MAX20405)

C12, C13, C15

C14

Maxim Integrated

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Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

MAX20406 EV Kit Schematic Diagram

F B

1 2

1 3

1 4

1 5

1 6

1 7

O U T

V E A

P G O O D

S Y N C

S Y N C O U T

1 0 K

B I A S

R 2

B I A S

Figure 1. MAX20406 EV Kit Schematic

Maxim Integrated

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Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

MAX20406 EV Kit PCB Layout Diagrams

MAX20406 EV Kit PCB Layout—Top Silkscreen

MAX20406 EV Kit PCB Layout—Top Layer

MAX20406 EV Kit PCB Layout—Internal Layer 2

Maxim Integrated

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Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

MAX20406 EV Kit PCB Layout Diagrams (continued)

MAX20406 EV Kit PCB Layout—Internal Layer 3

MAX20406 EV Kit PCB Layout—Bottom Layer

MAX20406 EV Kit PCB Layout—Bottom Silkscreen

Maxim Integrated

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Evaluates: MAX20404/MAX20405/

MAX20406

MAX20406 Evaluation Kit

Revision History

REVISION REVISION

PAGES

CHANGED

DESCRIPTION

NUMBER

DATE

9/19

1/20

Initial release

—

Updated title to MAX20404/MAX20405/MAX20406; updated BOM

1–7

Updated General Description, Quick Start, Detailed Description, BOM, and

Layout Diagrams

3/21

7/21

1–6

Updated Procedure, Additional Evaluation, Detailed Description of Hardware,

BOM, Schematic Diagram, and PCB Layout Diagrams

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses

are implied. Maxim Integrated reserves the right to change the circuitry and speciﬁcations without notice at any time.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

2021 Maxim Integrated Products, Inc.

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