MAX764EVKIT-SO+ Maxim Integrated, MAX764EVKIT-SO+ Datasheet - Page 2

• Manufacturer Part Number: MAX764EVKIT-SO+
• Description: Power Management IC Development Tools MAX764 Eval Kit
• Manufacturer: Maxim Integrated
• Series: MAX764, MAX765, MAX766r

The MAX764 EV kit is a fully assembled and tested sur-
face-mount board. Do not turn on the power supply
until all connections are completed.
1) Connect a 5.0V supply to the pad marked VIN.
2) Connect a voltmeter and load (if any) to the VOUT
3) Place the shunt on J1 across pins 1 and 2 for normal
4) Turn on the power and verify that the output voltage
5) Refer to the sections
The 3-pin header J1 selects shutdown mode. Table 1
lists the selectable jumper options.
MAX764 Evaluation Kit
Table 1. Jumper J1 Functions
Figure 1. MAX764 EV Kit Schematic
2
_________________________Quick Start
_______________Detailed Description
SHUNT LOCATION
Ground connects to the GND pad.
pad.
operation.
is -5.0V.
MAX766 and Other Output Voltages to modify the
board for different output voltages.
_______________________________________________________________________________________
1 & 2
2 & 3
VIN 3V to 16V
SHDN
GND
1
Connected to GND
Connected to VIN
3
SHDN PIN
J1
2
0.1µF
C3
Evaluating the MAX765/
Jumper Selection
SHORT
R1
MAX764 enabled,
V
Shutdown mode,
V
MAX764 OUTPUT
OUT
OUT
= -5.0V
= 0V
3
4
2
5
SHDN
REF
FB
GND
MAX764
OPEN
R2
U1
OUT
V+
V+
LX
The 47µH Sumida CD54-470 inductor that comes
mounted on the EV kit is a low-resistance, medium-
current inductor. It provides excellent performance over
the line and load ranges of the MAX764/MAX765/
MAX766. See the Inductor Selection section in the
MAX764/MAX765/MAX766 data sheet for more
information.
The MAX764 can be replaced by either the MAX765 to
generate a -12V output with load currents up to 125mA,
or by the MAX766 to generate a -15V output with load
currents up to 100mA. Note that the input voltage range
is reduced due to the maximum V
21V. The only other modification required is to use a
low-ESR output capacitor (C2) with a voltage rating of
20V or greater. Refer to the Capacitor Selection section
in the MAX764/MAX765/MAX766 data sheet for more
information.
The MAX764/MAX765/MAX766 are preset for -5V, -12V,
and -15V output voltages, respectively. However, they
may be adjusted to other values through an external
voltage divider formed by R1 and R2 (located on the
board’s solder side). For output voltages greater than
10V, capacitor C2 must be replaced by a capacitor wih
a higher working voltage. The only other modification
required is to cut the trace accross R1. The Setting the
Output Voltage section in the MAX764/MAX765/
MAX766 data sheet gives instructions for calulating R1
and R2 values.
* Output current is a function of input voltage.
See the MAX764 data sheet for Typical Operating Characteristics.
7
6
8
1
L1
47µH
Evaluating the MAX765/MAX766
1N5818
C4
0.1µF
D1
Inductor Selection Notes
C2
330µF
10V
C1
120µF
20V
Other Output Voltages
IN
-V
250mA*
150mA
VOUT
OUT
-5V
to
differential of