19-3730; Rev 1; 4/08
MAX5060 Evaluation Kit
General Description
The MAX5060 evaluation kit (EV kit) provides a +3.3V
adjustable output voltage from a +12V input source. It
delivers up to 20A of output current with a switching fre-
quency of 270kHz and achieves efficiencies up to 93%.
The MAX5060 single-phase, PWM controller provides
high-output-current capability in a compact package
with a minimum number of external components. The
MAX5060 utilizes average current-mode control that
offers accurate current limit and current sharing, and
avoids oversizing the MOSFETs and inductor.
Differential sensing enables accurate control of the out-
put voltage, while adaptive voltage positioning provides
optimum transient response. An internal regulator
enables operation with +4.75V to +5.5V, or +7V to
+28V input-voltage ranges. The high switching frequen-
cy, up to 1.5MHz, allows the use of low inductor and
input capacitor values. This accommodates the use of
PCB-embedded planar magnetics, achieving superior
reliability, current sharing, thermal management, com-
pact size, and low system cost.
The MAX5060 also features a clock input (CLKIN) for
synchronization to an external clock, and a clock output
(CLKOUT) with 180° phase delay to control a second
out-of-phase converter for lower-input-capacitor ripple
current. The MAX5060 also limits the reverse current if
the bus voltage becomes higher than the regulated out-
put voltage. This device is specifically designed to limit
current sinking when multiple power-supply modules
are paralleled. The MAX5060 offers an adjustable
+0.6V to +5.5V (V
IN
> 7V) output voltage.
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
Features
+10V to +14V Input-Voltage Range
3.3V Output Voltage
20A Output Current
270kHz Switching Frequency
Up to 93% Efficiency
Synchronization Up to 1.5MHz
Limits Reverse-Current Sinking
Voltage Signal Proportional to the Output Current
Clock Output for Ripple-Phase Operation
Overvoltage Protection
Enable (ON/OFF) Input
Power-Good Output
Size: 1.65in x 1.05in
Requires 400LFM Airflow and Larger Heatsink for
0°C to +70°C Temperature Range
Evaluates: MAX5060
Ordering Information
PART
MAX5060EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHs-compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
470pF
±10%,
50V X7R ceramic
capacitors (0402)
KEMET C0402C471K5RAC
Murata GRP155R71H471K
0.022µF
±10%,
16V X7R ceramic
capacitor (0402)
Murata GRP155R71C223K
0.01µF
±10%,
25V X7R ceramic
capacitor (0402)
KEMET C0402C103K3RAC
Murata GRP155R71E103K
0.22µF
±10%,
6.3V X5R ceramic
capacitor (0402)
Murata GRM155R60J224K
DESIGNATION
QTY
DESCRIPTION
0.47µF
±10%,
10V X5R ceramic
capacitors (0603)
KEMET C0603C474K8PAC
Murata GRM188R61A474K
1µF
±10%,
10V X5R ceramic
capacitor (0603)
KEMET C0603C105K8PAC
Murata GRM188R61A105K
0.1µF
±10%,
25V X7R ceramic
capacitors (0603)
KEMET C0603C104K3RAC
Murata GRM188R71E104K
C1, C3
2
C6, C12
2
C2
1
C7
1
C4
1
C8, C9
2
C5
1
________________________________________________________________
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.
MAX5060 Evaluation Kit
Evaluates: MAX5060
Component List (continued)
DESIGNATION
C10, C11
QTY
2
DESCRIPTION
22µF
±20%,
16V X5R ceramic
capacitors (1812)
Murata GRM43ER61C226M
220µF
±20%,
4V, 5mΩ
E-size, SP-cap
Panasonic EEFSE0G221R
Not installed (0603)
100µF
±20%,
6.3V X5R ceramic
capacitor (1210)
AVX 12106D107MAT
Murata GRM32ER60J107M
47µF
±20%,
6.3V X5R ceramic
capacitor (1206)
Murata GRM31CR60J476M
20V, 0.5A Schottky diode
(SOD123)
Diodes Inc. B0520LW
Fairchild Semiconductor MBR0520L
Central Semiconductor CMHSH5-2L
35V, 8A Schottky diode
POWERMITE 3
Microsemi UPS835LE3/TR13
30V, 0.1A Schottky diode
(SOD523)
Central Semiconductor CMOSH-3
8-pin header, single-row, straight,
0.05in center
0.6µH, 20A inductor
Pulse PG0702.601NL
20V, 25A, 4m
Ω
n-channel MOSFETs
(8 SO PowerPak)
Vishay Siliconix Si7866DP
npn transistor (SOT523)
Central Semiconductor
CMUT2222A
—
1
DESIGNATION
R1
R2
R3
R4, R17
R5
R6
R7, R14
R8
R9
R10
R11
R12
R13
R15, R18
R16
R19
R20
R21
U1
QTY
1
1
1
2
1
1
0
1
1
1
1
1
1
2
1
1
1
1
1
DESCRIPTION
2.0kΩ
±1%
resistor (0402)
100kΩ
±1%
resistor (0402)
51.1kΩ
±1%
resistor (0402)
4.99kΩ
±1%
resistors (0402)
100kΩ
±5%
resistor (0402)
226kΩ
±1%
resistor (0402)
Not installed, resistors (0402)
10kΩ
±1%
resistor (0402)
0Ω resistor (0603)
5.6kΩ
±5%
resistor (0402)
1Ω
±5%
resistor (0402)
2.2Ω
±5%
resistor (0402)
0.001Ω
±1%,
0.5W current-sense
resistor (2010)
Vishay Dale WSL2010-18 0.001
22Ω
±5%
resistors (0402)
22.1kΩ
±1%
resistor (0402)
10kΩ
±5%
resistor (0402)
100kΩ
±5%
resistor (0402)
20.5kΩ
±1%
resistor (0402)
Current-mode DC-DC controller
(28 TQFN)
Maxim MAX5060ETI+
Aluminum heatsink
Width = 0.40in, height = 0.40in
Length = 1.65in
Color = unfinished
Double-sided thermal tape, 0.40in
x 1.65in Bond-ply 100
Thickness = 0.008in
The Bergquest Company
BP100-0.008
PCB: MAX5060 Evaluation Kit+
C13
C14
1
1
C15
1
C16
1
D1
1
D2
1
D3
1
J1
L1
1
1
—
1
N1, N2
2
—
1
Q1
1
2
_______________________________________________________________________________________
MAX5060 Evaluation Kit
Component Suppliers
SUPPLIER
AVX Corporation
Central Semiconductor Corp.
Diodes Inc.
Fairchild Semiconductor
KEMET Corp.
Murata Electronics North America, Inc.
Panasonic Corp.
Pulse Engineering
TDK Corp.
Vishay
PHONE
843-946-0238
631-435-1110
805-446-4800
888-522-5372
864-963-6300
770-436-1300
800-344-2112
858-674-8100
847-803-6100
402-563-6866
WEBSITE
www.avxcorp.com
www.centralsemi.com
www.diodes.com
www.fairchildsemi.com
www.kemet.com
www.murata-northamerica.com
www.panasonic.com
www.pulseeng.com
www.component.tdk.com
www.vishay.com
Evaluates: MAX5060
Note:
Indicate that you are using the MAX5060 when contacting these component suppliers.
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• MAX5060 EV kit
• One DC power source capable of supplying 10A at
12V
• One voltmeter
• One load capable of sinking 30A
Detailed Description of Hardware
The MAX5060 EV kit provides a +3.3V adjustable out-
put voltage from a +12V input source. It delivers up to
20A of output current with 400LFM of airflow.
Remote Voltage Sensing
For high currents, there can be significant voltage drop
across the wires connecting the MAX5060 converter to
the load. To compensate for this voltage drop, the
MAX5060 EV kit includes remote sense pins that allow
the voltage to be sensed at the load. To use this fea-
ture, connect wires from VOUT_SENSE and SENSE-
(pins 7 and 8 of J1 on the MAX5060 EV kit) to the load.
Procedure
The MAX5060 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) Connect +VIN and COM to the DC power.
2) Connect +VOUT and COM to the load.
3) Set the load to 5A.
4) Turn on the power supply and increase the voltage
to 12V.
5) Verify the voltage at +VOUT is +3.3V.
Enable
The EN (pin 11 on the MAX5060) is internally pulled up
to VCC with 15µA of current. This allows the MAX5060
to power on when the +12V input source powers on. To
control enable with an external signal generator, con-
nect the external signal generator to enable (pin 4 of J1
on the MAX5060 EV kit). A logic-low shuts down the
power drivers.
_______________________________________________________________________________________
3
MAX5060 Evaluation Kit
Evaluates: MAX5060
Table 1. MAX5060 EV Kit Pinout
CONNECTOR
PIN
1
2
3
J1
4
5
6
7
8
NAME
SYNC/ON
V_IOUT
SGND
EN
PGOOD
CLK_OUT
SENSE-
VOUT_SENSE
DESCRIPTION
Drive with an external signal to synchronize the switching frequency.
Connecting to COM turns off the MAX5060.
The voltage on this pin is proportional to the output load current. On the
MAX5060 EV kit, V_IOUT = 0.135 x I
LOAD
.
Signal Ground.
Enable.
Power-Good Output. Open-drain, active-low output goes low when the
output voltage falls out of regulation.
Oscillator Output.
Low-Side Remote Voltage Sense Input.
High-Side Remote Voltage Sense Input.
Output Voltage
The MAX5060 EV kit provides a +3.3V output voltage.
Change the output voltage to a value between 0.6V and
5.5V by changing the resistor-divider R16/R17.
Use the equation shown below to set the output voltage.
R16
R17
=
⎞
⎛
⎜
V
OUT(NL)
⎟
⎟ −
1
⎜
⎜
0.6
× ⎛
1
+
R4
⎞ ⎟
⎜
⎟
⎜
⎝
R2
⎠ ⎟
⎠
⎝
Use resistors between 1kΩ and 10kΩ.
4
_______________________________________________________________________________________
MAX5060 Evaluation Kit
Evaluates: MAX5060
Figure 1. MAX5060 EV Kit Pinout
_______________________________________________________________________________________
5
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