MAX1518EVKIT+ Maxim Integrated Products, MAX1518EVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX1518EVKIT+
• Description: Power Management Modules & Development Tools MAX1518 EVAL KIT MAX1518 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX1518EVKIT+

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

Table
The MAX1518 EV kit contains a step-up switching regu-
lator and two linear regulators. It operates from a +4.5V
to +5.5V DC power supply. The switching frequency is
1.2MHz. As configured, the step-up switching regulator
generates a +13V output and can provide up to
650mA. VPOS uses two charge-pump stages to gener-
ate approximately +25V and can provide up to 10mA.
VNEG uses one charge-pump stage to generate
approximately -8V and can provide up to 15mA. The EV
kit includes five high-current operational amplifiers.
The positive charge pump can be powered by VIN or
VMAIN. Jumper JU1 selects the voltage source for the
positive charge pump.
The default configuration for the positive charge pump
of the MAX1518 EV kit is a two-stage charge pump
powered by VIN as indicated in Tables 1 and 2.
The negative charge pump can be connected to VIN or
PGND. Jumper JU2 selects the voltage source for the
negative charge pump.
options. The default configuration for the negative
charge pump of the MAX1518 EV kit is a one-stage
charge pump connected to PGND.
SHUNT LOCATION
(default)
1. Jumper JU1 Functions
1-2
2-3
Negative Charge Pump (JU2)
_______________________________________________________________________________________
Positive Charge Pump (JU1)
1st stage of a two-stage charge pump
powered by VMAIN
1st stage of a 2-stage charge pump
powered by VIN
Detailed Description
Table
POSITIVE CHARGE-PUMP
Jumper Selection
Table
1 lists the jumper options.
INPUT VOLTAGE
2 lists the jumper
MAX1518 Evaluation Kit
The MAX1518 EV kit’s step-up switching-regulator output
is set to +13V by feedback resistors R1 and R2. To gen-
erate output voltages other than +13V (+4.7V to +V
select different external voltage-divider resistors (R1 and
R2). The output capacitors (C4, C5, and C6) are rated at
+16V. To set the output voltage greater than +15V, use
higher-voltage rated capacitors. Refer to the Output
Voltage Selection section in the MAX1518 data sheet for
instructions on selecting the feedback resistors.
The MAX1518 EV kit’s positive linear-regulator output is
set to +25V by feedback resistors R3 and R4. To gen-
erate output voltages other than +25V (+1.25V to
+28V), select different external voltage-divider resistors
(R3 and R4). Refer to the Output Voltage Selection sec-
tion in the MAX1518 data sheet for instructions on
selecting the resistors.
The MAX1518 EV kit’s negative linear-regulator output is
set to -8V by feedback resistors R7 and R8. To generate
output voltages other than -8V (0 to -22V), select different
external voltage-divider resistors (R7 and R8). Refer to
the Output Voltage Selection section in the MAX1518
data sheet for instructions on selecting the resistors.
Table 2. Jumper JU2 Functions
Negative Linear-Regulator Output Voltage
SHUNT LOCATION
Positive Linear-Regulator Output Voltage
(default)
1-2
1-3
1-4
Step-Up Switching-Regulator Output
Output Voltage Selection
Charge pump connected to PGND
Charge pump connected to another
charge pump
Charge pump connected to VIN
NEGATIVE CHARGE-PUMP
INPUT VOLTAGE
Voltage (VMAIN)
(VNEG)
(VPOS)
MAIN
3
),