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MAXM17546 5V Output
Evaluation Kit
Evaluates: MAXM17546 5V Output
General Description
The
Himalaya
series of voltage regulator ICs and power
modules enable cooler, smaller, and simpler power-sup-
ply solutions. The MAXM17546 5V-output evaluation kit
(EV kit) is a demonstration circuit of the MAXM17546 42V,
5A high-efficiency, current-mode, synchronous step-down
DC-DC switching power module. The EV kit operates
over a wide input-voltage of 7.5V to 42V and provides
up to 5A load current with a 5V-output voltage. The EV
kit is programmed to switch at a frequency of 450kHz.
The module is simple to use and easily configurable with
minimal external components. It features cycle-by-cycle
peak current-limit protection, under-voltage lockout (EN/
UVLO), and thermal shutdown.
The EV kit comes with the compact 29-pin 15mm x 9mm x
4.32mm SiP package MAXM17546 module installed and
is rated to operate over the full industrial -40°C to +125°C
temperature range.
The MAXM17546 module data sheet provides a complete
description of the part that should be read in conjunction
with this data sheet prior to operating the EV kit. For full
module features, benefits and parameters, refer to the
MAXM17546 data sheet.
Quick Start
Recommended Equipment
●
MAXM17546EVKITB# evaluation kit
●
7.5V to 42V DC, 4A power supply
●
Dummy load capable of sinking 5A
●
Digital voltmeter (DVM)
●
100MHz dual-trace oscilloscope
Equipment Setup and Test Procedure
The MAXM17546 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution:
Do not turn on the power supply until all connections
are completed.
1)
2)
3)
Set the power supply at a voltage between 7.5V and
42V. Disable the power supply.
Connect the positive and negative terminals of the
power supply to VIN and GND PCB pads, respectively.
Connect the positive and negative terminals of the 5A
load to VOUT and GND PCB pads respectively, and
the set the load to 0A.
Connect the DVM across the VOUT PCB pad and the
GND PCB pad.
Verify that shunts are not installed on jumper J1 (see
Figure 2
for details).
Select the shunt position on jumper J2 according to the
intended mode of operation (see
Table 2
for details).
Enable the input power supply.
Verify the DVM display 5V.
Increase the load up to 5A to verify the output voltage
is 5V using DVM.
4)
5)
6)
7)
8)
9)
Features
●
Wide 7.5V to 42V Input Range
●
Highly Integrated Solution with Built-In Shielded
Inductor
●
Programmed 5V Output, Up To 5A Output Current
●
All Ceramic Capacitors and Ultra-Compact Solution
●
Selectable PWM, DCM, and PFM Modes
●
Programmable 4ms Soft-Start Time and Prebias
Startup
●
Open-Drain RESET Output Pulled Up To 5V V
CC
●
Programmable EN/UVLO Threshold
●
Provision for External Frequency Synchronization
●
Hiccup Overcurrent Protection (OCP)
●
Overtemperature Protection (OTP)
●
-40°C to +125°C Industrial Temperature Range
Ordering Information
appears at end of data sheet.
319-100177; Rev 0; 4/18
MAXM17546 5V Output
Evaluation Kit
Detailed Description of Hardware
Evaluates: MAXM17546 5V Output
The MAXM17546 EV kit is a proven circuit to demonstrate
the high-voltage, high-efficiency, and compact solution
size of the MAXM17546 synchronous step-down DC-DC
power module. The output voltage is preset to 5V to oper-
ate from 7.5V to 42V input and provides up to 5A load
current. The optimal frequency is set at 450kHz to maxi-
mize efficiency and minimize component size. The EV kit
includes four test points, TP1 for monitoring the
RESET,
TP2 for measuring the LX voltage, TP3 for monitoring the
DL voltage and TP4 for measuring the BST voltage.
should not be installed across pins 1-2 on JU1 to enable
the output through an internal pullup 3.32MΩ resistor from
the EN/UVLO pin to the IN pin. To disable the output,
install the shunt across pins 1-2 on JU1 to pull the EN/
UVLO pin to GND. See
Table 1
for JU1 setting details.
The EV kit also provides an R3 resistor to program a
UVLO threshold voltage at which an input-voltage level
device turns on. The R3 resistor can be calculated by the
following equation:
R3 = 3320 x 1.215/(V
INU
–1.215)
where V
INU
is the input voltage at which the device is
required to turn on, and R3 is in kΩ.
Soft-Start Input (SS)
The MAXM17546 module implements adjustable soft-start
operation to reduce inrush current. A capacitor connected
from the SS pin to SGND programs the soft-start time.
The selected output capacitance (C
SEL
) and the output
voltage (V
OUT
) determine the minimum required soft-start
capacitor as follows:
C
SS
≥ 28 x 10
-6
x C
SEL
x V
OUT
The soft-start time (t
SS
) is related to the capacitor
connected at SS (C
SS
) by the following equation:
t
SS
= C
SS
/(5.55 x 10
-6
)
where t
SS
is in ms and C
SS
is in nF. For example, to pro-
gram a 4ms soft-start time, a 22nF capacitor should be
connected from the SS pin to SGND.
MODE/SYNC Selection (MODE)
The device’s MODE pin can be used to select among the
PWM, PFM, or DCM modes of operation. The logic state
of the MODE pin is latched when the V
CC
and EN/UVLO
voltages exceed the respective UVLO rising thresholds
and all internal voltages are ready to allow LX switching.
State changes on the MODE pin are ignored during nor-
mal operation. Refer to the MAXM17546 IC data sheet
for more information on the PWM, PFM, and DCM modes
of operation.
Table 2
lists JU2 jumper settings that can be used to
configure the desired mode of operation. The internal
oscillator of the device can be synchronized to an external
clock signal on the SYNC pin. The external synchroniza-
tion clock frequency must be between 1.1 x f
SW
and 1.4 x
f
SW
, where f
SW
is the frequency of operation set by R4.
The minimum external clock high pulse width should be
greater than 50ns, while the minimum external clock low
pulse width should be greater than 160ns.
Regulator Enable/
Undervoltage-Lockout Level (EN/UVLO)
The EV kit offers an adjustable input undervoltage-lockout
level by resistor-dividers connecting between the IN, EN/
UVLO, and GND pins. For normal operation, a shunt
Table 1. EN/UVLO Enable/Disable Configuration (JU1)
SHUNT POSITION
1-2
Not installed*
*Default position
EN PIN
Connected to GND
Connected to the center node of
resistor-divider 3.32MΩ and R3
MAXM17546_OUTPUT
Disabled
Enabled, UVLO level set through
the 3.32MΩ and R3 resistors
Table 2. MODE Description (JU2)
SHUNT POSITION
Not installed
1-2
2-3*
*Default position
MODE PIN
Unconnected
Connected to V
CC
Connected to GND
MAXM17546_MODE
PFM mode of operation
DCM mode of operation
PWM mode of operation
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2
MAXM17546 5V Output
Evaluation Kit
Table 3. EXTVCC Configuration (JU3)
SHUNT POSITION
Not installed
1-2
2-3*
*Default position
EXTVCC PIN
Unconnected
Connected to GND
Connected to V
OUT
Evaluates: MAXM17546 5V Output
MAXM17546_EXTVCC
EXTVCC unused
EXTVCC = GND
EXTVCC = V
OUT
MAXM17546 EV Kit Performance Report
EFFICIENCY vs. LOAD CURRENT
(5V OUTPUT, PWM MODE, f
SW
= 450kHz)
EFFICIENCY vs. LOAD CURRENT
(5V OUTPUT, PFM MODE, f
SW
= 450kHz)
100
90
80
100
90
80
toc01
toc02
EFFICIENCY vs. LOAD CURRENT
(5V OUTPUT, DCM MODE, f
SW
= 450kHz)
100
90
80
70
60
50
40
30
20
10
V
IN
= 12V
1
10
100
1000
0
V
IN
= 24V
V
IN
= 42V
toc03
EFFICIENCY (%)
EFFICIENCY (%)
70
60
50
40
30
20
10
0
1000
2000
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
70
60
50
40
30
20
10
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
3000
4000
5000
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
EFFICIENCY (%)
LOAD CURRENT (mA)
OUTPUT VOLTAGE vs. LOAD CURRENT
(5V OUTPUT, PWM MODE, f
SW
= 450kHz)
5.02
5.00
toc04
OUTPUT VOLTAGE vs. LOAD CURRENT
(5V OUTPUT, PFM MODE, f
SW
= 450kHz)
5.20
5.15
toc05
OUTPUT VOLTAGE (V)
4.98
4.96
4.94
4.92
4.90
V
IN
= 24V
V
IN
= 42V
V
IN
= 12V
OUTPUT VOLTAGE (V)
5.10
5.05
5.00
4.95
4.90
4.85
V
IN
= 24V
5
50
V
IN
= 42V
500
5000
V
IN
= 12V
5
50
500
5000
4.80
LOAD CURRENT (mA)
LOAD CURRENT (mA)
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3
MAXM17546 5V Output
Evaluation Kit
Evaluates: MAXM17546 5V Output
MAXM17546 EV Kit Performance Report (continued)
STEADY-STATE SWITCHING WAVEFORMS
(V
IN
= 24V, V
OUT
= 5V, I
OUT
= 5A
PWM MODE, MODE = SGND)
toc06
POWER-UP AND DOWN THROUGH EN/UVLO
(V
IN
= 24V, V
OUT
= 5V, I
OUT
= 5A
PWM MODE, MODE = SGND)
toc07
LOAD TRANSIENT
(V
IN
= 24V, V
OUT
= 5V, I
OUT
= 0A TO 2.5A
PWM MODE, MODE = SGND)
toc08
V
OUT
20mV/div
(AC-
COUPLED)
V
EN/UVLO
2V/div
V
OUT
100mV/div
(AC-
COUPLED)
V
OUT
V
RESET
V
LX
10V/div
I
OUT
5V/div
5V/div
1A/div
I
OUT
5A/div
2µs/div
4ms/div
200µs/div
LOAD TRANSIENT
(V
IN
= 24V, V
OUT
= 5V, I
OUT
= 2.5A TO 5A
PWM MODE, MODE = SGND)
toc09
BODE PLOT
(V
IN
= 24V, V
OUT
= 5V, I
OUT
= 5A)
40
30
100mV/div
(AC-
COUPLED)
PHASE
toc10
120
100
80
60
40
V
OUT
20
10
GAIN (dB)
0
-10
-20
f
CR
= 36kHz,
PHASE MARGIN = 62°
10
3
10
4
FREQUENCY (Hz)
10
5
GAIN
20
0
-20
-40
-60
I
OUT
2A/div
-30
-40
400µs/div
Ordering Information
PART
MAXM17546EVKITB#
#Denotes RoHS compliant.
TYPE
EV Kit
Component Suppliers
SUPPLIER
TDK Corp.
Murata Americas
Panasonic Corp.
Vishay
WEBSITE
www.tdk.com
www.murata.com
www.panasonic.com
www.vishay.com
Note:
Indicate that you are using the MAXM17546 when con-
tacting these component suppliers.
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Maxim Integrated
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4
PHASE (°)
MAXM17546 5V Output
Evaluation Kit
MAXM17546 EV Kit Bill of Materials
TITLE: Bill of Materials
DATE: 03/16/2018
DESIGN: maxm17546_evkit_b
Evaluates: MAXM17546 5V Output
ITEM
1
2
3
QTY
REF DES
2 C1, C2
1 C3
1 C4
Var Status
Pref
Pref
Pref
MAXINV
20-0010U-B40
20-0047U-A17
20-0U022-91
MFG PART #
GRM32ER71H106KA12; CL32B106KBJNNN
EEE-FK1K470P
C0603C223K5RAC; GRM188R71H223K;
C1608X7R1H223K080AA
MANUFACTURER
MURATA;SAMSUNG ELECTRONICS
PANASONIC
KEMET;MURATA;TDK
VALUE
10UF
47UF
0.022UF
DESCRIPTION
CAPACITOR; SMT (1210); CERAMIC CHIP; 10UF; 50V; TOL=10%; TG=-55 DEGC
TO +125 DEGC; TC=X7R
CAPACITOR; SMT (CASE_G); ALUMINUM-ELECTROLYTIC; 47UF; 80V; TOL=20%
CAPACITOR; SMT (0603); CERAMIC CHIP; 0.022UF; 50V; TOL=10%; TG=-55
DEGC TO +125 DEGC; TC=X7R
CAPACITOR; SMT (1210); CERAMIC CHIP; 22UF; 16V; TOL=20%; TG=-55 DEGC
TO +125 DEGC; TC=X7R; NOTE: NOT RECOMMENDED FOR NEW DESIGN-USE
20-0022u-G9
CAPACITOR; SMT (0603); CERAMIC CHIP; 2.2PF; 50V; TOL=+-0.1PF;
MODEL=ACCU-P; TG=-55 DEGC TO +125 DEGC
CAPACITOR; SMT (0402); CERAMIC CHIP; 0.1UF; 50V; TOL=10%; TG=-55 DEGC
TO +125 DEGC; TC=X7R
EVK KIT PARTS; MAXIM PAD; WIRE; NATURAL; SOLID; WEICO WIRE; SOFT
DRAWN BUS TYPE-S; 20AWG
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 2PINS
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 3PINS
RECEPTACLE; JACK; BANANA; 0.203IN [5.2MM] DIA X 0.218IN [5.5MM] L;
0.203D/0.218L; NICKEL PLATED BRASS
RESISTOR; 0603; 191K OHM; 1%; 100PPM; 0.10W; METAL FILM
RESISTOR; 0603; 42.2K OHM; 1%; 100PPM; 0.10W; THICK FILM
RES; SMT (0603); 665K; 1%; +/-100PPM/DEGK; 0.1W
RESISTOR; 0603; 10K; 1%; 100PPM; 0.10W; THICK FILM
0 RESISTOR; 0603; 0 OHM; 0%; JUMPER; 0.10W; THICK FILM
TEST POINT; JUMPER; STR; TOTAL LENGTH=0.256IN; BLACK; INSULATION=PBT
CONTACT=PHOSPHOR BRONZE; COPPER PLATED TIN OVERALL
TEST POINT; PIN DIA=0.1IN; TOTAL LENGTH=0.3IN; BOARD HOLE=0.04IN;
RED; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR
BOARD THICKNESS=0.062IN; NOT FOR COLD TEST
EVKIT PART-IC; LGA 15MMX9MMX4.42MM; 32LD; 1.27 PITCH
TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.35IN; BOARD HOLE=0.063IN;
RED; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR
BOARD THICKNESS=0.062IN
PCB:MAXM17546
4
5
6
7
8
9
10
11
12
13
14
15
3 C5, C6, C12
1 C11
2 C19, C20
3 IN, OUT, PGND
1 J1
2 J2, J3
4
1
1
1
1
J4-J7
R1
R2
R3
R5
Pref
Pref
Pref
Pref
Pref
Pref
Pref
Pref
Pref
Pref
Pref
Pref
20-0022U-C8
20-002P2-N6
20-000U1-04A
01-9020BUSS20AWG-00
01-PBC02SABN2P-21
01-PBC03SABN3P-21
02-57541P-01
80-0191K-24
80-042K2-24
80-0665K-10
80-0010K-24
80-0000R-27
C1210C226M4RAC;C3225X7R1C226M250AC;GR
M32ER71C226MEA8
KEMET;TDK;MURATA
06035J2R2BBT; GRM39C0G2R2B50V
CGA2B3X7R1H104K; C1005X7R1H104K050BB;
GRM155R71H104KE14
9020 BUSS
PBC02SABN
PBC03SABN
575-4
CRCW0603191KFK
CRCW060342K2FK
CRCW0603665KFK
CRCW060310K0FK;ERJ-3EKF1002
AVX;MURATA
TDK;TDK;MURATA
WEICO WIRE
SULLINS
SULLINS
KEYSTONE
VISHAY DALE
VISHAY DALE
VISHAY DALE
VISHAY DALE;PANASONIC
22UF
2.2PF
0.1UF
MAXIMPAD
PBC02SABN
PBC03SABN
575-4
191K
42.2K
665K
10K
1 R8
CRCW06030000ZS;MCR03EZPJ000;ERJ-3GEY0R00 VISHAY DALE;ROHM;PANASONIC
16
3 SU1-SU3
Pref
02-JMPFSTC02SYAN-00
STC02SYAN
SULLINS ELECTRONICS CORP.
STC02SYAN
17
18
4 TP1-TP4
1 U1
Pref
Pref
02-TPMINI5000-00
00-SAMPLE-01
MAXM17546
5000 KEYSTONE
MAXIM
N/A
MAXM17546
19
20
TOTAL
1 VCC
1 PCB
35
Pref
-
02-TPCOMP5005-00
EPCBM17546
MAXM17546
5005 KEYSTONE
MAXIM
N/A
PCB
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