MAX1531EVKIT Maxim Integrated Products, MAX1531EVKIT Datasheet - Page 8

• Manufacturer Part Number: MAX1531EVKIT
• Description: Power Management Modules & Development Tools MAX1531 EVAL KIT MAX1531 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX1531EVKIT

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

The power supply for the VGAM linear regulator can be
connected to PIN or STEP_UP. PIN is the input voltage
for the EV kit. STEP_UP is the output of the MAX1522
step-up switching regulator circuit on the EV kit.
Jumper JU14 selects the power supply for the VGAM
linear regulator on the MAX1531 EV kit. Table 10 lists
the jumper options.
The power supply for the VSRC linear regulator can be
connected to PIN or STEP_UP. PIN is the input voltage
for the EV kit. STEP_UP is the output of the MAX1522
step-up switching regulator circuit on the EV kit.
Jumper JU15 selects the power supply for the VSRC
linear regulator on the MAX1531 EV kit. Table 11 lists
the jumper options.
The MAX1531 EV kit includes a MAX1522 step-up
switching regulator. This regulator is not generally
needed, but is provided as a convenience for applica-
tions where the input voltage (PIN) can be less than
VSRC. If the step-up is needed, enable the MAX1522
MAX1531 Evaluation Kit
Table 10. Jumper JU14 Functions
Table 11. Jumper JU15 Functions
8
LOCATION
LOCATION
(Default)
(Default)
SHUNT
SHUNT
_______________________________________________________________________________________
None
None
1-2
2-3
1-2
2-3
Connected to
Connected to
Connected to
Connected to
STEP_UP
SUPPLY
Not used
STEP_UP
SUPPLY
Not used
POWER
The MAX1522 Step-Up Circuit
POWER
VSRC
VGAM
PIN
PIN
VSRC powered from the
output of the MAX1522 step-
up regulator.
VSRC powered from PIN.
VSRC not used.
VGAM powered from the
output of the MAX1522 step-
up regulator.
VGAM powered from PIN.
VGAM not used.
VGAM Power Supply
VSRC Power Supply
OPERATING MODE
OPERATING MODE
using JU16 and set JU14 and JU15 so that VGAM and
VSRC use the step-up’s output.
The MAX1531 EV kit’s step-down switching-regulator
output (VOUT) is set to +3.3V by feedback resistors R1
and R2. To generate output voltages other than +3.3V
(from +1.24V up to 0.6 x V
voltage-divider resistors (R1, R2). Output capacitor C7
is rated to +6.3V. To set the output voltage greater than
+6.3V, use a higher-voltage-rated capacitor. Refer to
the Main Step-Down Regulator Output Voltage
Selection section in the MAX1531 data sheet for
instructions on selecting the resistors.
The MAX1531 EV kit’s logic-voltage-supply linear regu-
lator output (VLOG) is set to +2.5V by feedback resis-
tors R9 and R10. To generate output voltages other
than +2.5V (from +1.24V up to VOUT) select different
external voltage-divider resistors (R9, R10). Output
capacitor C9 is rated to +6.3V. To set the output volt-
age greater than +6.3V, use a higher-voltage-rated
capacitor. Refer to the Linear-Regulator Controllers
Output Voltage Selection section in the MAX1531 data
sheet for instructions on selecting the resistors.
The MAX1531 EV kit’s gamma-reference linear regula-
tor output (VGAM) is set to +9.7V by feedback resistors
R18 and R19. To generate output voltages other than
+9.7V (from +1.24V up to its input voltage) select differ-
ent external voltage-divider resistors (R18, R19). Output
capacitor C12 is rated to +16V. To set the output volt-
age greater than +16V, use a higher-voltage-rated
capacitor. Refer to the Linear-Regulator Controllers
Output Voltage Selection section in the MAX1531 data
sheet for instructions on selecting the resistors.
Table 12. Jumper JU16 Functions
LOCATION
(Default)
SHUNT
Step-Down Switching-Regulator Output
1-2
2-3
Logic-Voltage-Supply Linear Regulator
Gamma-Reference Linear Regulator
Connected to
Connected to
Output Voltage Selection
SHDN PIN
MAX1522
VOUT
GND
Output Voltage (VGAM)
Output Voltage (VLOG)
PIN
), select different external
OPERATING MODE
Voltage (V
MAX1522
Disabled
Enabled
OUT
)