MAX850EVKIT-SO Maxim Integrated, MAX850EVKIT-SO Datasheet - Page 2

• Manufacturer Part Number: MAX850EVKIT-SO
• Description: Charge Pumps Evaluation Kit for the MAX850 MAX851 MAX852 MAX853
• Manufacturer: Maxim Integrated

Specifications of MAX850EVKIT-SO

• Function: Inverting
• Output Voltage: - 4.1 V, - 0.5 V to - 9 V
• Output Current: 5 mA

The MAX850 EV kit is fully assembled and tested.
Follow the steps below to verify board operation. Do
not turn on the power supply until all connections
are completed.
1) Connect a 4.5V to 10.0V supply to the VIN pad at
2) Connect a voltmeter and the load to the VOUT pad.
3) Place the shunt on J1 across pins 1 and 2. This
4) Turn on the power and verify that the output is
The 3-pin header, J1, controls pin 4 on the IC. Pin 4's
function depends on the IC mounted on the board. On
the MAX850/MAX853, pin 4 is a S
when connected to GND). For the MAX851, the device
is disabled when pin 4 is connected to V
MAX852, pin 4 is an input pin for an external oscillator.
Table 1 outlines the shunt positions for J1.
MAX850 Evaluation Kit
Table 1. J1 Shunt Positions
2
_________________________Quick Start
_______________Detailed Description
SHUNT POSITION
the top of the board. Connect the ground lead to
the adjacent GND pad.
connects the S
-4.1V. You can insert a scope probe into J3 to
observe the output noise. Be sure the scope
ground makes contact with the outside of the con-
nector.
_______________________________________________________________________________________
Open
1 & 2
2 & 3
—
H
—
D
—
N
–
CONNECTION
Connected to
pin to V
PIN 4
GND
pad
V
IN
IN
.
—
H
—
D
—
N
S
device enabled
S
device disabled
Pin 4 is driven by
user signal
connected to
SHDN/OSC pad
–
—
—
H
H
—
—
pin (disabled
FUNCTION
D
D
—
—
MAX850
N
N
IN
–
–
high,
low,
. On the
For output voltages other than -4.1V, cut the trace
across J2 that disconnects FB from GND, and install
two resistors (R1 and R2) for the output voltage divider.
Mounting pads for the resistors are located on the
board’s solder side. Cutting the trace across the loca-
tion marked J2 disconnects the pin from ground. See
the MAX850–MAX853 data sheet for instructions on cal-
culating R1 and R2 values.
For the MAX850, MAX851, and MAX852, connect V
to GND. For the MAX853, connect V
voltage to control V
V
V
______________Component Suppliers
Matsuo
Specialty Connectors
OUT
IN
.
SUPPLIER
= -V
CTRL
, assuming V
OUT
[phone]
[phone]
. For example, if R1 = R2, then
PHONE
CTRL
is at least 1V below
CTRL
[phone]
[phone]
to a positive
FAX
CTRL