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Evaluate: MAX20075/MAX20075D/
MAX20075/MAX20076
MAX20076/MAX20076D/MAX20076E/
Evaluation Kits
MAX25276/MAX25276D
Procedure
General Description
The EV kit is fully assembled and tested, follow the steps
The MAX20075 and MAX20076 evaluation kits (EV kit)
below to activate the board. Caution: Do not turn on the
provide a proven design to evaluate the MAX20075/
power supply until all connections are completed.
MAX20076/MAX25276 2.1MHz high-voltage mini-buck
converters in a 12-pin TDFN package. All components are
1) Verify that all jumpers are in their default positions, as
rated for the automotive temperature range. Various test
shown in Table 1.
points and jumpers are included for evaluation.
2) Connect the positive and negative terminals of
the power supply to the SUP and GND test pads,
The EV kit comes with a MAX2007_DATCA/V+ installed,
respectively.
but can also be used to evaluate all other MAX20075/
3) Connect the positive terminal of the voltmeter to OUT,
MAX20076/MAX25276 variants with minimal U1 compo-
and the negative terminal to GND2.
nent changes.
4) Set the power supply to 14V and 2A current limit. Turn
on the power supply.
Benefits and Features
5) With the PU and LED jumpers shorted, the green
3.5V to 36V Input Supply Range
LED should light up. The voltmeter should display
5V or 3.3V Fixed Output Voltage, or Adjustable
an output voltage of 5V.
Between 1V and 10V
Additional Evaluation
Delivers Up to 0.6A/1.2A Output Current
6) Connect the positive and negative terminals of an
Frequency-Synchronization Input
electronic load to OUT and GND, respectively.
Enable Input
7) Set the electronic load to 100mA or use an equivalent
Voltage-Monitoring PGOOD Output
resistive load. The resistive load is calculated based
on 5V output and should be approximately 50. If
Proven PCB Layout
using a resistor load, make sure it can handle 0.5W.
Fully Assembled and Tested
8) Turn on the power supply and electronic load. Verify
that OUT is 5V.
Quick Start
Required Equipment
MAX20075 or MAX20076 EV kit
Table 1. Default Jumper Settings
3.5V to 36V, 2A power supply
SHUNT
Voltmeter
JUMPER FUNCTION
POSITION
Electronic load
EN Middle-ON Buck controller enabled
SPS Middle-OFF Spread spectrum disabled
PGOOD pulls up to V
BIAS
PU, LED Installed
when OUT is in regulation
SYNC Middle-FPWM Forced-PWM mode
Ordering Information appears at end of data sheet.
19-8754; Rev 3; 2/20Evaluate: MAX20075/MAX20075D/
MAX20075/MAX20076
Evaluation Kits MAX20076/MAX20076D/MAX20076E/
MAX25276/MAX25276D
Evaluating the Other Variants
Detailed Description
The devices are available in fixed 5V, 3.3V, and 5.147V out-
The MAX20075 and MAX20076 EV kits provide a
puts. The EV kits come installed with the 5V output version.
proven layout for the MAX20075/MAX20075D/MAX20076/
The other parts can be swapped with the 5V part without
MAX20076D/MAX20076E/MAX25276/MAX25276D
changing other components.
2.1MHz synchronous buck regulator. The device accepts
input voltages as high as 36V and delivers up to 0.6A and
Setting the Output Voltage in
1.2A. The EV kits can handle an input-supply transient
Buck Converters
up to 42V. Various test points are included for evaluation.
To externally adjust the output voltage (OUT) between 3V
Switching Frequency/
and 10V, remove R1 and install a 0 resistor on R4. Place
External Synchronization
appropriate resistors in positions R5 and R6 according to
the following equation:
The devices can operate in two modes: forced-PWM
or skip. Skip mode has better efficiency for light-load
V
OUT
conditions. When SYNC is pulled low, the device operates
R5 R6 1
V
in skip mode for light loads and in PWM mode for larger
FB
loads. When SYNC is pulled high, the device is forced to
where V = 1V (typ).
FB
operate in PWM across all load conditions.
Use an external resistor-divider with the MAX2007_ATCC
SYNC can be used to synchronize with other supplies if a
for output voltages between 1V and 3V.
clock source is present. The device is forced to operate in
PWM when SYNC is connected to a clock source.
Buck Output Monitoring (PGOOD)
Ordering Information
The EV kits provide a power-good output test point
PART TYPE
(PGOOD) to monitor the status of the buck output (OUT).
PGOOD is low impedance when the output voltage is in
MAX20075EVKIT# EV Kit
regulation. PGOOD is high impedance when the output
MAX20076EVKIT# EV Kit
voltage drops below 6.5% (typ) of its nominal regulated
#Denotes RoHS compliant.
voltage.
To obtain a logic signal, pull up PGOOD to V by
BIAS
installing shunts on jumpers PU and LED.
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www.maximintegrated.com
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