MAX1790EVKIT Maxim Integrated Products, MAX1790EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1790EVKIT
• Description: Power Management Modules & Development Tools MAX1790 EVAL KIT MAX1790 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX1790EVKIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The EV kit features a shutdown mode that reduces the
MAX1790 quiescent current to 0.1µA, preserving bat-
tery life. The three-pin header, JU1, selects the shut-
down mode (Table 1).
The EV kit output is programmed to 5V. However, the
output voltage can also be adjusted from V
selecting R1 and R2 values. R2 can have a value up to
500kΩ without sacrificing accuracy. R1 is then given
by:
where V
Refer to the Application Circuits section of the
MAX1790 data sheet for different output voltage cir-
cuits.
The MAX1790 is shipped to operate at 640kHz. The
switching frequency can be changed to 1.2MHz by
installing jumper JU2 (Table 2). Refer to the MAX1790
data sheet for selecting the proper components to
operate at 1.2MHz.
MAX1790 Evaluation Kit
2
_______________________________________________________________________________________
FB
= 1.24V.
Evaluating Other Output Voltages
R1 = R2 [(V
Switching Frequency Selection
Detailed Description
OUT
/ V
FB
Shutdown Mode
) - 1]
IN
to 12V by
Table 1. Jumper JU1 Functions
Table 2. Frequency Pin Setting
Installed
Not installed
LOCATION
LOCATION
SHUNT
SHUNT
1-2
2-3
Connected to VIN
Floating
Connected to GND
Connected to VIN
FREQUENCY PIN
SHDN PIN
MAX1790 enabled,
V
Shutdown mode,
V
OUT
OUT
MAX1790 OUTPUT
FREQUENCY
SWITCHING
= +5V
= V
1.2MHz
640kHz
IN
- V
DIODE