19-5936; Rev 0; 6/11
MAX17019N Evaluation Kit
The MAX17019N evaluation kit (EV kit) demonstrates
the MAX17019’s standard application circuit. This quadoutput converter steps down high-voltage batteries and/
or AC adapters, generating main supplies for ultramobile PCs (UMPCs).
The EV kit provides a 5V main stage output voltage
(VOUTA), a 1.8V VDDQ output voltage (VOUTB), a 1.05V
chipset supply output voltage (VOUTC), and a 0.9V VTT
output voltage (VOUTD) from a 6V to 38V battery input
range. It delivers up to 4A output current for the 5V output, 2.5A for the 1.8V output, 4A for the 1.05V output, and
2A for the 0.9V output. The 1.8V VDDQ and 0.9V VTT are
for DDR2 memory applications. All outputs are adjustable by changing feedback resistors R5–R10.
The IC 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.
This EV kit is a fully assembled and tested circuit board.
It also allows the evaluation of other fixed output voltages
by changing R5–R10 resistors.
Features
S 6V to 38V Input Range
S Internal 5V Linear Regulator with 50mA Load
Capability
S Output Voltages
VOUTA: 5V Up to 4A
(Adjustable from 1V to 5.3V)
VOUTB: 1.8V Up to 2.5A
(Adjustable from 0.75V to 4V)
VOUTC: 1.05V Up to 4A
(Adjustable from 0.75V to 4V)
VOUTD: 0.9V Up to 2A
(Adjustable from 0.5V to 2V)
S 0.5MHz Switching Frequency (5V and 1.05V
Outputs)
S 1MHz Switching Frequency (1.8V Output)
S Independent Enable Inputs and Power-Good
Outputs
S Overvoltage and Undervoltage Fault Protection
S Thermal Fault Protection
S Proven PCB Layout
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX17019NEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
C1, C2
2
4.7FF Q10%, 50V X7R ceramic
capacitors (1210)
Murata GRM32ER71H475K
AVX 12105C475KAT2A
C3
1
22FF, 50V aluminum electrolytic
capacitor (6.3mm x 6.0mm DxL)
SANYO 50CE22KX
C6
4
4.7FF Q10% 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J475K
TDK C1608X5R0J475K
C7, C17, C21,
C29
C4, C11, C20,
C24
C5, C25, C33
QTY
DESCRIPTION
3
1FF Q10%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J105K
TDK C1005X5R0J105K
1
1FF Q10%, 50V X7R ceramic
capacitor (0805)
Murata GRM21BR71H105K
4
0.1FF Q10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R60J104K
TDK C1005X5R1A104K
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Evaluates: MAX17019
General Description
Evaluates: MAX17019
MAX17019N Evaluation Kit
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
C9
1
150FF, 6.3V low-ESR capacitor
(B case)
SANYO 6TPE150MAZB
NEC TOKIN PSLB0J157M(35)
C10, C32, C35
0
Not installed, capacitors (B case)
1
680pF Q10%, 50V X7R ceramic
capacitor (0402)
Murata GRM155R71H681K
TDK C1005X7R1H681K
C14
C15, C36, C37
C16, C26, C34
C18, C30
C19, C22
C23
C27, C28
C31
0
Not installed, capacitors (0805)
3
10FF Q20%, 6.3V X5R ceramic
capacitors (0805)
Murata GRM21BR60J106M
TDK C2012X5R0J106M
2
2
1
2
1
1000pF Q10%, 50V X7R ceramic
capacitors (0402)
Murata GRM155R71H102K
TDK C1005X7R1H102K
330FF, 2.5V low-ESR capacitors
(B case)
SANYO 2TPE330MAFGB
NEC TOKIN PSLB20E337M(18)
2200pF Q10%, 50V X7R ceramic
capacitor (0402)
Murata GRM155R71H222K
TDK C1005X7R1H222K
22FF, 6.3V X5R ceramic
capacitors (0805)
TDK C2012X5R0J226MT
Taiyo Yuden JMK212BJ226MG
0.22FF Q10%, 10V X5R ceramic
capacitor (0402)
Murata GRM155R60J224K
TDK C1005X5R0J224K
DESIGNATION
QTY
DESCRIPTION
D1
1
250mA, 50V Schottky diode
(SOT323)
Central Semi CMSSH-3E
L1
1
4.7FH, 7A, 20mI inductor
(7mm x 7mm x 4mm)
Würth 744311470
L2, L3
2
1FH, 6.8A, 14.2mI inductors
(5.8mm x 6.2mm x 3.0mm)
NEC TOKIN MPLC0525L1R0
TOKO FDV0530-1R0M
N1-A, N1-B
1
Dual n-channel MOSFETs (8 SO)
Fairchild FDS6982AS
POKA–POKD,
REFIND,
SYNC, VTTR
7
Test points
R1
1
10I Q5% resistor (0402)
R2, R21
2
0I Q5% resistors (0402)
R3, R4, R20,
R24, R29
0
Not installed, resistors (0402)
R5
1
40.2kI Q1% resistor (0402)
R6, R8, R10,
R22, R23
5
10kI Q1% resistors (0402)
R7
1
14kI Q1% resistor (0402)
R9
1
4.02kI Q1% resistor (0402)
R11–R19
9
100kI Q5% resistors (0402)
R25
1
51I Q5% resistor (0402)
R26
1
0.004I Q1%, 1/4W resistor (1206)
Vishay (Dale) WSL12064L000FEA
R27, R28
0
Not installed, resistors—short (PC
trace) (0612)
SW1
1
5-position, low-profile DIP switch
ITT SD05H0SB or Equivalent
U1
1
Quad output controller
(48 TQFN-EP)
Maxim MAX17019ATM+
—
1
PCB: MAX17019N EVALUATION
KIT+
2 _______________________________________________________________________________________
MAX17019N Evaluation Kit
SUPPLIER
PHONE
WEBSITE
AVX Corporation
843-946-0238
www.avx.com
Central Semiconductor Corp.
631-435-1110
www.centralsemi.com
Fairchild Semiconductor
888-522-5372
www.fairchildsemi.com
Murata Manufacturing Co., Ltd.
770-436-1300
www.murata.com
NEC TOKIN America, Inc.
408-324-1790
www.nec-tokinamerica.com
SANYO Electric Company, Ltd.
619-661-6835
www.sanyodevice.com
Taiyo Yuden
800-348-2496
www.t-yuden.com
TDK Corp.
847-803-6100
www.component.tdk.com
TOKO America, Inc.
847-297-0070
www.tokoam.com
Vishay
402-564-3131
www.vishay.com
Würth Electronik GmbH & Co. KG
201-785-8800
www.we-online.com
Note: Indicate that you are using the MAX17019 when contacting these component suppliers.
Quick Start
Required Equipment
•
MAX17019N EV kit
•
6V to 38V, 100W DC power supply
•
Four dummy loads capable of sinking 4A each
•
Four digital multimeters
•
100MHz dual-trace oscilloscope
Procedure
The 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 on position (SHDN = VBATT,
IC enabled).
Set SW1 (2, 9) to the on position (ONA = VDD,
VOUTA enabled).
Set SW1 (3, 8) to the on position (ONB = VDD,
VOUTB enabled).
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 PCB pads.
Connect the second DMM across the VOUTB and
GND PCB pads.
Connect the third DMM across the VOUTC and
GND PCB pads.
Connect the fourth DMM across the VOUTD and
GND PCB pads.
4) Turn on the power supply and adjust the input voltage to 12V.
5) Verify that the output voltages are VOUTA = 5V,
VOUTB = 1.8V, VOUTC = 1.05V, and VOUTD = 0.9V.
Detailed Description of Hardware
5V Output-Voltage Setting (VOUTA)
The MAX17019N EV kit is shipped with FBA connected
to resistors R5 and R6, which sets the VOUTA voltage
to 5V.
To change the output voltage to a value between 1V
and 5.3V, remove R5. Calculate R5 using the following
equation:
R5 = R6 [(VOUTA/VFBA) - 1]
where VFBA = 1V and R6 =10kI Q1%. For an output
voltage of 1V, place a short across R5 and leave R6
open.
_______________________________________________________________________________________ 3
Evaluates: MAX17019
Component Suppliers
Evaluates: MAX17019
MAX17019N Evaluation Kit
1.8V Output-Voltage Setting (VOUTB)
The EV kit is shipped with FBB connected to resistors R7
and R8, which sets the VOUTB voltage to 1.8V.
To change the output voltage to a value between 0.75V
and 4V, remove R7. Calculate R7 using the following
equation:
R7 = R8 [(VOUTB/VFBB) - 1]
where VFBB = 0.75V and R8 =10kI Q1%. For an output
voltage of 0.75V, place a short across R7 and leave R8
open.
1.05V Output-Voltage Setting (VOUTC)
The EV kit is shipped with FBC connected to resistors R9
and R10, which sets the VOUTC voltage to 1.05V.
To change the output voltage to a value between 0.75V
and 4V, remove R9. Calculate R9 using the following
equation:
R9 = R10 [(VOUTC/VFBC) - 1]
where VFBC = 0.75V and R10 =10kI Q1%. For an output
voltage of 0.75V, place a short across R9 and leave R10
open.
0.9V Output-Voltage Setting (VOUTD)
The EV kit is shipped with FBD connected directly to
output voltage VOUTD. The voltage at FBD tracks the
REFIND voltage. The REFIND voltage is set to 0.9V (half
the output voltage at VOUTB) by resistor-divider R22
and R23.
To change the VOUTD output voltage to a value between
0.5V and 2V, remove R22. Calculate R22 using the following equation:
R22 = R23 [(VOUTB/VOUTD) - 1]
where R23 =10kI Q1%.
Frequency Selection (FREQ)
The switching frequency of the EV kit can be adjusted
by removing resistor R24 and installing a short across
resistors R20 or R21. As configured, the 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.
Table 1. Switch SW1 Settings
SW1
SW1-A
SW1-B
SW1-C
SW1-D
SW1-E
PIN CONTROL
IC OUTPUT
Off
SHDN pin is connected to GND
Shutdown mode (all outputs disabled)
On
SHDN pin is connected to VBATT
ONA pin is connected to GND
IC enabled (all outputs depend on SW1 position settings)
Off
On
ONA pin is connected to VDD
Enables VOUTA, VOUTA = 5V
Off
ONB pin is connected to GND
Disables VOUTB, VOUTB = 0V
On
ONB pin is connected to VDD
Enables VOUTB, VOUTB = 1.8V
Off
ONC pin is connected to GND
Disables VOUTC, VOUTC = 0V
On
ONC pin is connected to VDD
Enables VOUTC, VOUTC = 1.05V
Off
OND pin is connected to GND
Disables VOUTD, VOUTD = 0V
On
OND pin is connected to VDD
Enables VOUTD, VOUTD = 0.9V
Disables VOUTA, VOUTA = 0V
Note: As configured, the MAX17019N EV kit is shipped with all SW1 settings in the off position.
Table 2. Switching-Frequency Selection
FREQ PIN
SWITCHING FREQUENCY
VOUTA
VOUTB
VOUTC
Connected to VDD through open resistor R24
250kHz
500kHz
250kHz
Connected to REF through open resistor R20
375kHz
750kHz
375kHz
Connected to GND through 0I resistor R21*
500kHz
1MHz
500kHz
*Default position.
4 _______________________________________________________________________________________
MAX17019N Evaluation Kit
Evaluates: MAX17019
Figure 1. MAX17019N EV Kit Schematic
_______________________________________________________________________________________ 5
Evaluates: MAX17019
MAX17019N Evaluation Kit
1.0”
Figure 2. MAX17019N EV Kit Component Placement Guide—
Component Side
1.0”
Figure 4. MAX17019N EV Kit PCB Layout—Layer 2
1.0”
1.0”
Figure 3. MAX17019N EV Kit PCB Layout—Component Side
Figure 5. MAX17019N EV Kit PCB Layout—Layer 3
6 _______________________________________________________________________________________
MAX17019N Evaluation Kit
Evaluates: MAX17019
1.0”
Figure 6. MAX17019N EV Kit PCB Layout—Solder Side
1.0”
Figure 7. MAX17019N EV Kit Component Placement Guide—
Solder Side
_______________________________________________________________________________________ 7
MAX17019N Evaluation Kit
Evaluates: MAX17019
Revision History
REVISION
NUMBER
REVISION
DATE
0
6/11
DESCRIPTION
Initial release
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
8
© 2011
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.