MAX17019 Evaluation Kit
Evaluates: MAX17019
General Description
The MAX17019 evaluation kit (EV kit) presents the
MAX17019 high input-voltage quad-output controller in
a typical application setup. The EV kit operates from a
5.5V to 38V input range.
High-voltage controller A is used to generate a 5V rail that
serves as supply for the other three rails. These rails are
generated by two switching converters (rails B and C),
and one push-pull linear regulator (rail D). The supplies
for converters B and C and regulator D are accessible but
must be less than 6V.
The MAX17019 also has an internal fixed 5V linear
regulator capable of supplying 50mA. The EV kit operates
at 0.5MHz (VOUTA and VOUTC) and at 1MHz switching
frequency (VOUTB). The EV kit has superior line- and
load-transient response.
S
S
Features
S
5.5V to 38V Input Range with 42V Transient
S
S
Ordering Information
PART
MAX17019EVKIT+
TYPE
EV Kit
S
S
S
S
S
S
+Denotes
lead(Pb)-free and RoHS compliant.
Capability
Internal 5V Linear Regulator with 50mA Load
Capability
Output Voltages
VOUTA: 5V Up to 4A Peak Current,
Adjustable from 1V to 5.5V
VOUTB: 3.3V Up to 2.5A Peak Current,
Adjustable from 0.75V to 4V
VOUTC: 1.2V Up to 4A Peak Current,
Adjustable from 0.75V to 4V
VOUTD: 2.5V Up to 2A Current,
Adjustable from 0.5V to V
IND
Four Power-Good LEDs Help Monitor the Output
Voltages
0.5MHz Switching Frequency (5V and 1.2V
Outputs)
1MHz Switching Frequency (3.3V Output)
Independent Enable Inputs and Power-Good
Outputs
Overvoltage and Undervoltage Fault Protection
Thermal-Fault Protection
48-Pin (6mm x 6mm) Thin QFN Package
Fully Assembled and Tested
Component List
DESIGNATION
QTY
DESCRIPTION
4.7FF
Q10%,
50V X7R ceramic
capacitors (1210)
Murata GRM32ER71H475K
AVX 12105C475KAT2A
22FF, 50V aluminum electrolytic
capacitor (6.3mm x 6mm)
SANYO 50CE22KX
4.7FF
Q10%,
6.3V X5R ceramic
capacitors (0603)
TDK C1608X5R0J475K
Murata GRM188R60J475K
DESIGNATION
QTY
DESCRIPTION
1FF
Q10%,
6.3V X5R ceramic
capacitors (0402)
TDK C1005X5R0J105K
Taiyo Yuden JMK105BJ105MV
Murata GRM155R60J105K
1mF
Q10%,
50V X7R ceramic
capacitor (0805)
Murata GRM21BR71H105K
C1, C2
2
C5, C25, C33
3
C3
1
C6
1
C4, C11, C20,
C24
4
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4941; Rev 1; 4/15
MAX17019 Evaluation Kit
Evaluates: MAX17019
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
0.1FF
Q10%,
10V X5R ceramic
capacitors (0402)
TDK C1005X5R1A104K
Taiyo Yuden LMK105BJ104KV
Murata GRM155R60J104K
Not installed, ceramic capacitors
(0402)
150FF, 6.3V low-ESR capacitor
(B case)
SANYO 6TPE150MAZB
NEC TOKIN PSLB0J157M(35)
Not installed, ceramic capacitors
(B case)
680pF
Q10%,
50V X7R ceramic
capacitor (0402)
TDK C1005X7R1H681K
Taiyo Yuden UMK105BJ681KW
Murata GRM155R71H681K
Not installed, ceramic capacitors
(0805)
10FF
Q20%,
6.3V X5R ceramic
capacitors (0805)
TDK C2012X5R0J106M or
Taiyo Yuden AMK212BJ106MG
Murata GRM21BR60J106M
1000pF
Q10%,
50V X7R ceramic
capacitors (0402)
TDK C1005X7R1H102K
Taiyo Yuden UMK105BJ102KW
Murata GRM155R71H102K
330FF, 4V low-ESR capacitors
(D case)
SANYO 4TPF330ML (12mI)
NEC TOKIN PSLD0G337M(15)
2200pF
Q10%,
50V X7R ceramic
capacitor (0402)
TDK C1005X7R1H222K
Taiyo Yuden UMK105BJ222KW
Murata GRM155R71H222K
10FF
Q10%,
6.3V X5R ceramic
capacitor (0805)
TDK C2012X5R0J106K
Murata GRM21BR60J106K
DESIGNATION
QTY
DESCRIPTION
0.22FF
Q10%,
10V X5R ceramic
capacitor (0402)
TDK C1005X5R0J224K
Taiyo Yuden JMK105BJ224KV
Murata GRM155R60J224K
100nF
Q10%,
50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H104K
Murata GRM188R71H104K
250mA, 50V Schottky diode
(SOT323)
Central Semi CMSSH-3E
Green surface-mount LEDs (0805)
4-pin header
4.7FH, 7A, 20mI inductor
(7mm x 7mm x 4mm)
Würth 744311470
2.2FH, 13A, 11.5mI inductor
(7mm x 7mm x 4mm)
Würth 744311220
1FH, 6.8A, 14.2mI inductor
(5.8mm x 6.2mm x 3mm)
TOKO FDV0530-1R0M
NEC TOKIN MPLC0525L1R0
Dual 60V n-channel MOSFETs (8 SO)
Fairchild HUFA76413DK8T
Test points
10I
Q5%
resistor (0402)
0I resistors (0402)
Not installed, resistors (0402)
Not installed, resistor (0603)
40.2kI
Q1%
resistor (0603)
10kI
Q1%
resistors (0603)
34kI
Q1%
resistor (0603)
6.04kI
Q1%
resistor (0603)
100kI
Q5%
resistors (0402)
16.5kI
Q5%
resistor (0402)
4.02kI
Q5%
resistors (0603)
Maxim Integrated
C7, C17, C21,
C29
4
C31
1
C8, C12, C13
0
C38
1
C9
1
D1
D2–D5
JU1
L1
1
4
1
1
C10, C32,
C35
0
C14
1
C15, C28,
C36, C37
0
L2
1
C16, C26,
C34
3
L3
1
N1-A, N1-B
POKA–POKD,
REFIND,
SYNC, VTTR
R1
R2, R21, R30,
R31
R3, R20, R24,
R29
R4
R5
R6, R8, R10,
R22, R23
R7
R9
R11–R14
R15
R16–R19
2
C18, C30
2
7
1
4
0
0
1
5
1
1
4
1
4
C19, C22
2
C23
1
C27
1
2
MAX17019 Evaluation Kit
Evaluates: MAX17019
Component Suppliers (continued)
DESIGNATION
R25
R26
R27, R28
R32
R33
QTY
1
1
0
1
1
DESCRIPTION
51I
Q5%
resistor (0402)
0.004I
Q1%
1/4W resistor (1206)
Vishay (Dale) WSL12064L000FEA
Not installed, resistors—short (PC
trace) (0612)
82.5kI
Q5%
resistor (0402)
1kI
Q5%
resistor (0603)
DESIGNATION
SW1
U1
—
QTY
1
1
1
DESCRIPTION
5-position, low-profile DIP switch
Quad output controller
(48 TQFN-EP*)
Maxim MAX17019ATM+
PCB: MAX17019 EVALUATION KIT+
*EP
= Exposed pad.
Component Suppliers
SUPPLIER
Central Semiconductor Corp.
Fairchild Semiconductor
Murata Americas
NEC TOKIN America, Inc.
SANYO NA Corp.
Taiyo Yuden
TDK Corp.
TOKO America, Inc.
Vishay
Würth Electronik GmbH & Co. KG
PHONE
631-435-1110
888-522-5372
770-436-1300
408-324-1790
619-661-6835
800-348-2496
847-803-6100
847-297-0070
402-563-6866
201-785-8800
WEBSITE
www.centralsemi.com
www.fairchildsemi.com
www.murataamericas.com
www.nec-tokinamerica.com
www.sanyodevice.com
www.t-yuden.com
www.component.tdk.com
www.tokoam.com
www.vishay.com
www.we-online.com
Note:
Indicate that you are using the MAX17019 when contacting these component suppliers.
Quick Start
• MAX17019 EV kit
Recommended Equipment
Set SW1 (4, 7) to the on position (ONC = VDD,
VOUTC enabled).
Set SW1 (5, 6) to the on position (OND = VDD,
VOUTD enabled).
3) Connect the first DMM across the VOUTA and GND
pads.
• 5.5V to 38V DC power supply
• Four digital multimeters (DMMs)
• 100MHz dual-trace oscilloscope
The MAX17019 EV kit is a fully assembled and tested
surface-mount board. Follow the steps below to verify
board operation.
Caution: Do not turn on the power
supply until all connections are completed.
1) Ensure that the circuit is connected correctly to the
power supply and dummy loads prior to applying any
power.
2) Set SW1 (1, 10) to the off position (SHDN = VBATT,
MAX17019 disabled).
Set SW1 (2, 9) to the on position (ONA = VDD, VOUTA
enabled).
Set SW1 (3, 8) to the on position (ONB = VDD, VOUTB
enabled).
Maxim Integrated
Procedure
4) Connect the second DMM across the VOUTB and
GND pads.
5) Connect the third DMM across the VOUTC and GND
pads.
6) Connect the fourth DMM across the VOUTD and GND
pads.
7) Turn on the power supply and adjust input voltage to
12V.
8) Set SW1 (1, 10) to the on position (SHDN = VBATT,
MAX17019 activated).
9) All LEDs should be lit; verify that the output voltages
are VOUTA = 5V, VOUTB = 3.3V, VOUTC = 1.2V, and
VOUTD = 2.5V.
3
MAX17019 Evaluation Kit
Evaluates: MAX17019
Troubleshooting
Output Rails Do Not Come Up
The MAX17019 output rails incorporate undervoltage
shutoff and stay off until the corresponding ON_ switch
is toggled. Make sure the supplies to the rails are high
enough to allow it to regulate. Also check if the current
limit on the power supply is set high enough for the initial
startup current spike.
Current Capability Seems Too Low
The current capability listed in the data sheet is the peak
ripple current. DC current may be 30% lower. If the sup-
ply rails are cascaded, allow for lower external load cur-
rents. Also check the current limit on the power supply.
Load Regulation Seems Low
The control algorithm in the MAX17019 utilizes a load-
line architecture. This architecture improves stability and
step response at the cost of a weaker load response.
It may be necessary to set the output voltage higher to
fulfill accuracy requirements.
The MAX17019 EV kit is shipped with FBC connected to
resistors R9 and R10, which sets the VOUTC voltage to
1.2V.
To change the output voltage to a value between 0.75V
and 4V, remove R9. Calculate R9 using the following
equation:
V
=
R10 x
OUTC
−
1
R9
V
FBC
where V
FBC
= 0.75V and R10 =10kI
Q1%.
For an output
voltage of 0.75V, place a short across R9 and leave R10
open.
The MAX17019 EV kit is shipped with FBD connected to
resistors R22 and R23, which sets the VOUTD voltage
to 2.5V. The voltage at FBD tracks the REFIND voltage,
which is pulled up to the 1.25V reference output voltage
VREF through resistor R33.
To change the VOUTD output voltage to a value between
0.5V and V
IND
, remove R22. Calculate R22 using the fol-
lowing equation:
V
=
R23 x
OUTD
−
1
R22
V
FBD
where V
FBD
= V
REFIND
= 1.25V and R23 =10kI
Q1%.
Make sure the internal losses P
REGD
= (V
IND
- V
OUTD
) x
I
OUTD
do not violate the thermal limits of the IC (refer to
the MAX17019 IC data sheet).
1.2V Output-Voltage Setting (VOUTC)
2.5V Output-Voltage Setting (VOUTD)
Detailed Description of Hardware
The MAX17019 EV kit is shipped with FBA connected
to resistors R5 and R6, which sets the VOUTA voltage
to 5V.
5V Output-Voltage Setting (VOUTA)
To change the output voltage to a value between 1V
and 5.5V, remove R5. Calculate R5 using the following
equation:
V
=
R6 x
OUTA
−
1
R5
V
FBA
where V
FBA
= 1V and R6 =10kI
Q1%.
For an output volt-
age of 1V, place a short across R5 and leave R6 open.
The MAX17019 EV kit is shipped with FBB connected
to resistors R7 and R8, which sets the VOUTB voltage
to 3.3V.
3.3V Output-Voltage Setting (VOUTB)
Separate enable inputs and independent open-drain
power-good outputs allow flexible power sequencing.
Switch SW1 is provided to control the ONA–OND enable
inputs and the
SHDN
input. Table 1 summarizes SW1’s
function.
To display which of the outputs are in regulation, power-
good LED indicators D2–D5 are also provided.
Independent Enable Inputs and
Power-Good Outputs
To change the output voltage to a value between 0.75V
and 4V, remove R7. Calculate R7 using the following
equation:
V
=
R8 x
OUTB
−
1
R7
V
FBB
where V
FBB
= 0.75V and R8 =10kI
Q1%.
For an output
voltage of 0.75V, place a short across R7 and leave R8
open.
4
Maxim Integrated
MAX17019 Evaluation Kit
Evaluates: MAX17019
Table 1. Switch SW1 Settings
SW1
Off
SW1-A
On
PIN CONTROL
SHDN
pin is con-
nected to GND
SHDN
pin is con-
nected to VBATT
ONA pin is con-
nected to GND
ONA pin is con-
nected to VDD
ONB pin is con-
nected to GND
ONB pin is con-
nected to VDD
ONC pin is con-
nected to GND
ONC pin is con-
nected to VDD
OND pin is con-
nected to GND
OND pin is con-
nected to VDD
MAX17019 OUTPUT
Shutdown mode
(all outputs disabled)
MAX17019 enabled
(all outputs depend on
SW1 position settings)
Disables VOUTA,
VOUTA = 0V
Enables VOUTA,
VOUTA = 5V
Disables VOUTB,
VOUTB = 0V
Enables VOUTB,
VOUTB = 3.3V
Disables VOUTC,
VOUTC = 0V
Enables VOUTC,
VOUTC = 1.2V
Disables VOUTD,
VOUTD = 0V
Enables VOUTD,
VOUTD = 2.5V
Table 2. Switching-Frequency Selection
FREQ PIN
Connected to VDD
through open resistor R24
Connected to REF
through open resistor R20
Connected to GND
through 0I resistor R21*
*Default
position.
SWITCHING FREQUENCY
VOUTA
250kHz
375kHz
500kHz
VOUTB
500kHz
750kHz
1MHz
VOUTC
250kHz
375kHz
500kHz
Off
SW1-B
On
Off
SW1-C
On
Off
SW1-D
On
Off
SW1-E
On
Table 3. Jumper JU1 Functions
SHUNT POSITION
1-2*
1-3
1-4
*Default
position.
IND CONNECTS TO REGULATOR
VOUTA
VOUTB
VOUTC (only for custom setups
with VOUTC > VOUTD)
The MAX17019 EV kit includes a jumper (JU3) to select
which of the step-down switching regulators (VOUTA–
VOUTC) powers the push-pull linear regulator (VOUTD).
By default, the 2.5V VOUTD output stage is powered
from the IND input when a shunt is installed across
jumper JU1 pins 1-2 or pins 1-3, but not pins 1-4.
A user may want to set up VOUTC to 2.5V and VOUTD
to 1.25V for DDR RAM use. VOUTC can be set for 2.5V
using the equation from the
1.2V Output-Voltage Setting
(VOUTC)
section. For DDR RAM applications, VOUTD
can also track the REFIND voltage to provide a 1.25V
output. Remove R23 and replace R22 with a 0I resistor.
Under these two cases, JU1 may be configured to all
three settings.
Source/Sink Linear-Regulator Input (IND)
Note:
As configured, the MAX17019 EV kit is shipped with all
SW1 settings in the off position.
Frequency Selection (FREQ)
The switching frequency of the MAX17019 kit can be
adjusted by removing resistor R24 and installing a
short across resistors R20 or R21. As configured, the
MAX17019 EV kit operates at 0.5MHz (VOUTA and
VOUTC) and at 1MHz switching frequency (VOUTB).
When changing the switching frequency, refer to the
MAX17019 IC data sheet for the proper component
selections and calculations for the inductors and output
capacitors.
Maxim Integrated
5
stm32/stm8
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