MAX5097AEVKIT+ Maxim Integrated Products, MAX5097AEVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX5097AEVKIT+
• Description: EVAL KIT FOR MAX5097A
• Manufacturer: Maxim Integrated Products

Specifications of MAX5097AEVKIT+

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 600mA
• Voltage - Input: 5 ~ 40V
• Regulator Topology: Buck
• Frequency - Switching: 330kHz
• Board Type: Fully Populated
• Utilized Ic / Part: MAX5097A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX5097A EV kit is fully assembled and tested.
Follow these steps to verify board operation. Caution:
Do not turn on the power supply until all connec-
tions are completed.
•
•
•
1) Verify that a shunt is installed across jumpers JU1
2) Verify that a shunt is installed across pins 1-2 of
3) Connect the electronic load positive terminal to the
4) Connect the voltmeter to the VOUT and PGND pads.
5) Connect the power-supply positive terminal to the
6) Enable the electronic load output and set it to 80mA
7) Turn on the power supply and set it to 12V.
8) Verify that VOUT is 3.3V.
9) Remove the shunt from jumper JU1 and verify that
For instructions on selecting the feedback resistors for
other output voltages, see the Evaluating Other Output
Voltages section.
MAX5097A Evaluation Kit
Note: Indicate that you are using the MAX5097A when contact-
ing these component suppliers.
2
2
Diodes Inc.
Murata
Panasonic
Sumida
SUPPLIER
5V to 40V, 1A rated DC power supply
One voltmeter, one ammeter
Electronic load, such as an HP 6060B
(LDO/BUCK, Buck Mode enabled) and JU2 (SYNC,
330kHz).
jumper JU3 (EN, input enabled).
VOUT pad and connect the load’s negative terminal
to the PGND pad.
VIN pad and connect the supply ground to the
PGND pad.
current loading.
the LDO regulator output (VOUT) is 3.3V.
_______________________________________________________________________________________
_______________________________________________________________________________________
805-446-4800
770-436-1300
714-373-7366
847-545-6700
Component Suppliers
PHONE
Required Equipment
www.diodes.com
www.murata.com
www.panasonic.com
www.sumida.com
Output Startup
Quick Start
WEBSITE
The MAX5097A EV kit includes a high-efficiency cur-
rent-mode DC-DC step-down regulator (Buck Mode)
and a selectable low-quiescent-current LDO regulator
(LDO Mode). The EV kit circuit features a MAX5097A IC
in a 16-pin TQFN exposed paddle package. The
MAX5097A EV kit operates from a 5V to 40V input
range DC source that can provide the EV kit with 1A or
more of current.
The Buck Mode regulator provides a 3.3V output at up
to 600mA output current. An internal p-channel MOS-
FET works as a pass element when in LDO Mode and
delivers up to 100mA of load current. Resistors R1 and
R2 set the output voltage at VOUT. The output voltage
can be adjusted from 1.24V to 11V by selecting appro-
priate resistors. The EV kit’s Buck Mode regulator oper-
ates at a switching frequency of 330kHz or the circuit
can be configured to synchronize with an external clock
by removing jumper JU2.
When configured for synchronizing mode, an external
TTL square-wave clock is used to synchronize and set
the switching frequency up to 500kHz. SYNC and SGND
PCB pads are provided for connecting the external clock.
See the Clock Synchronization section for more informa-
tion on the external clock.
Capacitor C8 sets the soft-start feature. An open-drain
active-low RESET PCB pad is provided for interfacing.
The RESET pad is pulled up to VOUT by resistor R4, and
jumper JU3 controls the shutdown mode that reduces the
MAX5097A IC shutdown current to 6µA (typ).
The MAX5097A EV kit features two modes for regulat-
ing the output; a Buck Mode regulator or a low-quies-
cent-current LDO Mode regulator. The 2-pin jumper,
JU1, selects the mode of operation for the EV kit.
Table 1 lists the selectable jumper options.
Table 1. Operation Mode JU1 Functions
LOCATION
Installed
SHUNT
Open
Step-Down and Low-Quiescent-Current
Connected to
Connected to
Jumper Selection and VOUT
LDO/BUCK
BP with R7
SGND
Detailed Description
PIN
LDO regulator
(100mA max)
Buck Mode regulator
(600mA max)
Reconfiguration
OPERATION MODE
LDO Regulators
MAX5097A