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13

MAX77831 Evaluation Kit

Evaluates: MAX77831

Figure 14. HDI PCB Layout Recommendation (with 2520 Inductor and POKB/INTB)

#Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements.
+Denotes a lead(Pb)-free/RoHS-compliant package.

PART

U1 IC

DEFAULT OUTPUT VOLTAGE

TYPE

MAX77831WEVKIT#

MAX77T

5V

EV Kit

NOTE:

 PLACE C

IN

 AND C

OUT

 CLOSE TO THE IC TO MINIMIZE PARASITIC INDUCTANCE WITHIN THE LOOP

+

IN

PGND

OUT

PGND

BST1

V

L

FB

SEL

*USING INTERNAL 

FEEDBACK RESISTORS

BST2

LX1

LX2

**LAYOUT BASED ON

3.8A I

LIM

 CONFIGURATION

0603

0402

1008 (2520)

NON-HDI VIA

8mil HOLE, 16mil PAD

6mil HOLE, 12mil PAD

HDI µVIA

4mil HOLE,  8mil PAD

LEGEND

COMPONENT SIZES LISTED IN 

IMPERIAL (METRIC)

AGND

V

IO

EN

SDA

SCL

POKB/INTB

L

1008 (2520)

C

IN

060

3

C

IN

060

3

C

OU

T

060

3

C

OU

T

060

3

C

BST2

0603

C

BST1

0603

R

SEL

0402

R

PU

04

02

C

VIO

04

02

C

VL

0402

Ordering Information

Содержание MAX77831

Страница 1: ...g current limit and feed back configuration can be adjusted by changing the RSEL resistor value R9 The MAXUSB_INTERFACE allows the use of Windows based software with a friendly graphical user interfac...

Страница 2: ...RBOT OPTIONAL I2C INTERFACE LX1 EN IN FB AGND PGND MAX77831 L 1 5 H DC SOURCE 2 5V TO 16V ENABLE VOUT 4 5V TO 15V RSEL VL SEL OUT CVL 2 2 F 10V 0402 SCL SDA BST1 BST2 LX2 CBST1 0 22 F 50V 0603 CBST2 0...

Страница 3: ...nd PGND1 ter minals of the EV kit Turn the supply on and increase the voltage to 7 6V 6 Confirm the DVM connected to OUTS and PGND2S reads the default output voltage of the EV kit 5V Confirm the ammet...

Страница 4: ...for R9 which is the SEL pin configuration resistor RSEL The default RSEL value installed on the EV kit is 0 See Table 2 for the nominal RSEL values and their corresponding settings The switching curre...

Страница 5: ...commendations Default value installed on the EV kit RSEL FEEDBACK RESISTOR SELECTION TYPICAL ILIM A I2C SLAVE ADDRESS 7 BIT RSEL FEEDBACK RESISTOR SELECTION TYPICAL ILIM A I2C SLAVE ADDRESS 7 BIT 0 In...

Страница 6: ...al nodes OUT1 LX1 and LX2 See Figure 2 for their loca tions on the EV kit Use these probe points to eliminate as much noise as possible when measuring the critical nodes To ensure best results use a v...

Страница 7: ...n the MAXUSB_INTERFACE to the PC with a Micro USB cable for the first time wait about 30 seconds for Windows to automatically install the neces sary drivers Connecting GUI to MAXUSB_INTERFACE After op...

Страница 8: ...7831 s registers The Chip Identification section Figure 7 displays the revision and version information of the MAX77831 IC on the EV Kit Click Read to obtain information from the IC The POK Status and...

Страница 9: ...831 Evaluation Kit Evaluates MAX77831 Figure 7 Configuration Tab Chip Identification Section Figure 8 Configuration Tab POK Status and Fault Interrupt Source Section Figure 9 Configuration Tab POK Sta...

Страница 10: ...Resistor textboxes to allow correct calculation of the corresponding output voltage to be displayed on the GUI software Note Changing the Internal Feedback or External Feedback checkboxes Figure 10 d...

Страница 11: ...ines for achieving the best possible layout They are repeated here for convenience Place the input capacitors CIN and output capacitors COUT immediately next to the IN pin and OUT pin of the IC respec...

Страница 12: ...PGND islands risk interrupting the hot loops Connect AGND and AGND island to the low impedance ground plane on the PCB the same net as PGND Keep the power traces and load connections short and wide T...

Страница 13: ...AX77831BEWB T 5V EV Kit NOTE PLACE CIN AND COUT CLOSE TO THE IC TO MINIMIZE PARASITIC INDUCTANCE WITHIN THE LOOP IN PGND OUT PGND BST1 VL FB SEL USING INTERNAL FEEDBACK RESISTORS BST2 LX1 LX2 LAYOUT B...

Страница 14: ...0 3IN BOARD HOLE 0 04IN RED PHOSPHOR BRONZE WIRE SILVER PLATE FINISH J1 J2 2 PEC03SAAN SULLINS ELECTRONICS CORP PEC03SAAN EVKIT PART CONNECTOR MALE THROUGH HOLE BREAKAWAY STRAIGHT 3PINS 65 C TO 125 C...

Страница 15: ...SS 102 TT 2 0 1UF 0402 OPEN 0603 0402_FF SDA 0603 0805_FF 0 22UF BST1 10UF 0805CAP DNI MAXUSB_VIO MAXUSB_SDA MAXUSB_SCL DNI DNI 0402CAP 15K 0402 MAXUSB_SCL EN 6 3V PEC03SAAN 0402RES PEC03SAAN 200K 0 0...

Страница 16: ...16 MAX77831 Evaluation Kit Evaluates MAX77831 MAX77831 EV Kit Schematic Diagram STAND OFF MECHANICAL MH4 MH3 MH2 MH1 02 SOM35016H 00 9032 9032 02 SOM35016H 00 02 SOM35016H 00 9032 9032 02 SOM35016H 0...

Страница 17: ...Evaluation Kit Evaluates MAX77831 MAX77831 EV Kit PCB Layout Top Silkscreen MAX77831 EV Kit PCB Layout Top View MAX77831 EV Kit PCB Layout Internal 2 MAX77831 EV Kit PCB Layout Internal 3 1 0 1 0 1 0...

Страница 18: ...vices 18 MAX77831 Evaluation Kit Evaluates MAX77831 MAX77831 EV Kit PCB Layout Internal 4 MAX77831 EV Kit PCB Layout Bottom View MAX77831 EV Kit PCB Layout Internal 5 1 0 1 0 1 0 MAX77831 EV Kit PCB L...

Страница 19: ...er any patent or patent rights of Analog Devices Trademarks andregistered trademarks are the property of their respective owners REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 9 20 Initial...

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