MAX77504AAWE+ [MAXIM]
Sense Points for High-Accuracy Measurements;
| 型号： | MAX77504AAWE+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Sense Points for High-Accuracy Measurements |
| 文件： | 总8页 (文件大小：1066K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
General Description
Features and Default Settings
● Sense Points for High-Accuracy Measurements
The MAX77504 evaluation kit (EV kit) provides a proven
design to evaluate the MAX77504, a 3A high-efficiency
buck converter. The IC is capable of 2.6V to 14V input
and is output voltage configurable between 0.6V to 6V.
The factory default output voltage of this EV kit is set at
3.3V. Output voltage can be configured by changing the
feedback resistor values (R3 and R4). Two GPIO pins are
available to support Force PWM and EN function.
● Accessible Test Points for EN, POK, FPWM, and
OUTS
● Switching Frequency Configurable Between 500kHz
to 1.5MHz Through SEL
● FPWM and Skip Mode Configurable (Skip Mode
Default)
● UVLO Rising = 2.6V, UVLO Falling = 2.4V
Ordering Information appears at end of data sheet.
SPECIFICATION
Input Voltage
TEST CONDITIONS
MIN
2.6
TYP
MAX
14
UNIT
V
Output Voltage
0.6
6
V
Default Output Voltage
Output Current
R3 = 49.9kΩ, R4 = 11.1kΩ
3.7V , 3.3V , 300mA load
3.3
V
0
3
A
Peak Efficiency
97.6
%
IN
OUT
MAX77504 Evaluation Board
MAX77504
SOLUTION
INPUT/OUTPUT
SENSE PINS
MAX77504
SOLUTION
SILKSCREEN
INPUT SUPPLY
TERMINALS
OUTPUT
TERMINALS
SKIP/FPWM
CONFIGURATION
RSEL
CONFIGURATION
319-100465; Rev 0; 11/19
MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
Quick Start
Description of Hardware
The MAX77504 EV kit demonstrates the MAX77504 buck
converter. It regulates output from input voltage ranges
from 2.6V to 14V. Configurable output range is from 0.6V
to 6.0V with feedback resistors R3 and R4. The EV kit
is suited with a general DC input. Table 1 lists jumpers and
associated functions that are available on the EV kit.
Required Equipment
● MAX77504 EV kit
● Adjustable DC power supply with 14V and 3A
capability
● Digital Multimeters
Procedure
Design Procedure (Choosing RSEL)
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation. Use twisted wires of
appropriate gauge (20AWG) that are as short as possible
to connect the load and power sources.
The MAX77504 includes an RSEL pin to configure the
switching frequency, mid-band gain, and active discharge
on startup. The configuration selection resistor (RSEL)
sets five bits of configuration options decoded in Table 2.
Choose RSEL[4:0] carefully by following the procedure
outlined in the Design Procedure section of the IC data
sheet; or refer to the Typical Application Circuits section of
the IC data sheet for a list of known good RSEL choices
for common applications. Resistors with tolerance 1%
(or better) should be chosen for R7, with nominal values
specified in Table 3. Ensure proper resistor configuration
by measuring the resistance across SEL and GND sense
points.
1) Ensure that the EV kit has the correct jumper settings,
as shown in Table 1.
2) Connect a DVM to the SUPS and GNDS sense pins
to measure input voltage.
3) Connect a DVM to the OUTS and GNDS sense pins
to measure output voltage.
4) Apply a power supply set to 0V (100mA current limit)
across the VIN and PGND terminals of the EV kit.
Turn the supply on and increase the voltage to 12V.
5) Confirm the DVM connected to OUTS and GNDS
reads the default output voltage of the EV kit (3.3V).
Table 1. Default Shunt Positions and Jumper Descriptions
NODE OR
FUNCTION
SHUNT
POSITION
JUMPER
FUNCTION
1-2*
2-3
Connects EN to V (MAX77504 is enabled by default).
IN
J1
J2
J3
J4
J5
EN
Connects EN to GND.
1-2
Enables FPWM function.
Enables SKIP mode function.
FPWM
RSEL
RSEL
2-3*
Potentiometer (R6) value configuration to set switching frequency, mid-band
gain, and active discharge (Default RSEL = OPEN).
1-2
1-2
Resistor (R7) value configuration to set switching frequency, mid-band gain,
and active discharge (Default RSEL = OPEN).
Resistor (R8) value configuration to set switching frequency, mid-band gain,
and active discharge (Default RSEL = OPEN).
RSEL
POK
1-2
J7
1-2*
Enables Power-OK indicator function.
* Default position
Maxim Integrated
│ 2
www.maximintegrated.com
MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
For example, choose a 30.9kΩ (1% TOL) resistor to
program RSEL[4:0] to 0x16. 0x16 (0b10110) decodes
with the following configuration:
Table 3 indicates that a 30.9kΩ selection resistor selects
code 0b10110 (0x16). The device evaluates R
SEL
whenever SUP is valid and EN transitions from logic 0 to
1. The decoded value of R
rising edge.
is latched until the next EN
SEL
● FSW[1:0] = 0b10 (1MHz switching frequency)
● GAIN[1:0] = 0b11 (200kΩ R
)
COMP
● ADEN = 0b0 (active discharge disabled)
Table 2. MAX77504 RSEL Configuration Bits
RSEL[4:0]
NAME
DESCRIPTION
DECODE
00 = 0.5MHz
01 = 0.75MHz
10 = 1.0MHz
11 = 1.5MHz
Bit 4
FSW[1:0]
Switching Frequency Control. Sets F
.
SW
Bit 3
Bit 2
Bit 1
Bit 0
MSB
00 = 75kΩ
01 = 100kΩ
10 = 150kΩ
11 = 200kΩ
GAIN[1:0]
ADEN
Mid-band gain control. Sets R
.
COMP
0 = disabled
1 = enabled
LSB
Active discharge resistor enable.
Program these bits by choosing a configuration selection resistor (R
) with a tolerance of 1% or better using lookup Table 3.
SEL
Table 3. Configuration Selection Resistor (RSEL) Lookup Table
R
(Ω) → RSEL[4:0]
SEL
95.3Ω or SHORT → 0x00
200Ω → 0x01
1620Ω → 0x0B
1870Ω → 0x0C
2150Ω → 0x0D
2490Ω → 0x0E
2870Ω → 0x0F
3740Ω → 0x10
8060Ω → 0x11
12400Ω → 0x12
16900Ω → 0x13
21500Ω → 0x14
26100Ω → 0x15
30900Ω → 0x16
36500Ω → 0x17
309Ω → 0x02
42200Ω → 0x18
422Ω → 0x03
48700Ω → 0x19
536Ω → 0x04
56200Ω → 0x1A
64900Ω → 0x1B
75000Ω → 0x1C
86600Ω → 0x1D
100000Ω → 0x1E
115000Ω or OPEN → 0x1F
649Ω → 0x05
768Ω → 0x06
909Ω → 0x07
1050Ω → 0x08
1210Ω → 0x09
1400Ω → 0x0A
Ordering Information
DEFAULT OUTPUT
VOLTAGE
PART
U1 IC
MAX77504AAWE+
UVLO FALLING
2.4V
UVLO RISING
MAX77504WEVKIT#
3.3V
2.6V
Maxim Integrated
│ 3
www.maximintegrated.com
MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
MAX77504 EV Kit Bill of Materials
PART
C1
QTY
1
MFG PART #
C1608X5R1E106M080AC
ANY
MANUFACTURER
DESCRIPTION
TDK
ANY
10μF ±10%, 10V X5R CERAMIC CAPACITOR (0603)
2.2μF ±10%, 6.3V X5R CERAMIC CAPACITOR (0402)
2.2pF ±5%, 50V C0G CERAMIC CAPACITOR (0402)
22μF ±20%, 10V X5R CERAMIC CAPACITOR (0603)
0.22μF ±10%, 16V X7R CERAMIC CAPACITOR (0402)
STRAIGHT CONNECTOR, 3 PINS
C3
1
C4
1
GRM1555C1H2R2BA01
C1608X5R1A226M080AC
ANY
MURATA
TDK
C5, C6, C7
C13
J1, J2
J7
3
1
ANY
2
TSW-103-07-T-S
TSW-102-07-T-S
FDSD0412-H-1R5M
ANY
SAMTEC
SAMTEC
MURATA
ANY
1
STRAIGHT CONNECTOR, 2 PINS
L1
1
1.5μH ±20%, ISAT=5.5A, DCR=53mΩ
0Ω, RESISTOR (0402)
R2, R5
R3
1
1
ERJ-2RKF4992
TNPW040211K1BE
MAX77504AAWE+
PANASONIC
VISHAY
MAXIM
49.9kΩ, RESISTOR (0402)
R4
1
11.1kΩ, RESISTOR (0402)
U1
1
BUCK (16 WLP), MAX77504AAWE+
Components below this line are outside of the immediate MAX77504 evaluation circuit and solution silkscreen.
C9
1
1
ANY
ANY
AVX
0.1μF ±10%, 10V X5R CERAMIC CAPACITOR (0402)
100μF ±10%, 16V TANTALUM CAPACITOR (6032)
C11
TPSC107K016R0200
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN;
BOARD HOLE=0.04IN; WHITE; PHOSPHOR BRONZE
WIRE SILVER;
EN, FPWM,
POK, POT, SEL
5
4
5002
KEYSTONE
GND, GND2-
GND5, OUT,
SUP
EVK KIT PARTS; MAXIM PAD; WIRE; NATURAL;
SOLID; WEICO WIRE; SOFT DRAWN BUS TYPE-S;
20AWG
9020 BUSS
WEICO WIRE
J3, J4, J5
LX, OUT1
3
2
TSW-102-07-T-S
SS-102-TT-2
SAMTEC
SAMTEC
STRAIGHT CONNECTOR, 2 PINS
IC-SOCKET; SIP; STRAIGHT; PRECISION MACHINED
SOCKET STRIP; OPEN FRAME; 2PINS; 100MIL
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN;
BOARD HOLE=0.04IN; RED; PHOSPHOR BRONZE
WIRE SILVER PLATE FINISH;
OUTS, SUPS,
VL
3
5000
KEYSTONE
R1
R6
1
1
CRCW0402100KFK
3296Y-1-204LF
VISHAY
100kΩ ±1%, RESISTOR (0402)
RESISTOR; THROUGH HOLE-RADIAL LEAD; 3296
SERIES; 200K OHM; 10%; 100PPM; 0.5W
BOURNS
PCB
C2, C8, C10
C12
1
0
0
0
MAX77504 SOLDERDOWN
MAXIM
N/A
PCB:MAX77504SOLDERDOWN
N/A
N/A
N/A
CAPACITOR; SMT (0603); OPEN; FORMFACTOR
CAPACITOR; SMT (0402); OPEN; FORMFACTOR
RESISTOR; 0402; OPEN; FORMFACTOR
N/A
R7, R8, R12
N/A
Maxim Integrated
│ 4
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MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
MAX77504 EV Kit Schematic
P G N D
B 4
P G N D
A 4
A G N D
D 3
A G N D
C 3
T S W - 1 0 2 - 0 7 - T - S
1
2
J 5
J 4
T S W - 1 0 2 - 0 7 - T - S
2
1
T S W - 1 0 2 - 0 7 - T - S
2
1
2
1
1
3 3
J 3
+
1
2
Maxim Integrated
│ 5
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MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
MAX77504 EV Kit PCB Layout Diagrams
MAX77504 EV Kit Component Placement Guide—Top Silkscreen
MAX77504 EV Kit PCB Layout—Internal 2
MAX77504 EV Kit PCB Layout—Top
MAX77504 EV Kit PCB Layout—Internal 3
Maxim Integrated
│ 6
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MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
MAX77504 EV Kit PCB Layout Diagrams (continued)
MAX77504 EV Kit PCB Layout—Bottom
MAX77504 EV Kit Component Placement Guide—Bottom Silkscreen
Maxim Integrated
│ 7
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MAX77504 WLP Evaluation Kit
Evaluates: MAX77504
(MAX77504AAWE+/MAX77504BAWE+)
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
11/19
Initial release
—
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.
2019 Maxim Integrated Products, Inc.
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