MAX17019NEVKIT+ Maxim Integrated, MAX17019NEVKIT+ Datasheet - Page 4

• Manufacturer Part Number: MAX17019NEVKIT+
• Description: Power Management IC Development Tools Maxim Evaluation Kit
• Manufacturer: Maxim Integrated
• Series: MAX17019r

MAX17019N Evaluation Kit
The EV kit is shipped with FBB connected to resistors R7
and R8, which sets the VOUTB voltage to 1.8V.
To change the output voltage to a value between 0.75V
and 4V, remove R7. Calculate R7 using the following
equation:
where VFBB = 0.75V and R8 =10kI Q1%. For an output
voltage of 0.75V, place a short across R7 and leave R8
open.
The EV kit is shipped with FBC connected to resistors R9
and R10, which sets the VOUTC voltage to 1.05V.
To change the output voltage to a value between 0.75V
and 4V, remove R9. Calculate R9 using the following
equation:
where VFBC = 0.75V and R10 =10kI Q1%. For an output
voltage of 0.75V, place a short across R9 and leave R10
open.
Table 1. Switch SW1 Settings
Note: As configured, the MAX17019N EV kit is shipped with all SW1 settings in the off position.
Table 2. Switching-Frequency Selection
*Default position.
4
Connected to VDD through open resistor R24
Connected to REF through open resistor R20
Connected to GND through 0I resistor R21*
SW1-C
SW1-D
______________________________________________________________________________________
SW1-A
SW1-B
SW1-E
1.05V Output-Voltage Setting (VOUTC)
1.8V Output-Voltage Setting (VOUTB)
SW1
R9 = R10 [(VOUTC/VFBC) - 1]
R7 = R8 [(VOUTB/VFBB) - 1]
Off
On
Off
On
Off
On
Off
On
Off
On
FREQ PIN
SHDN pin is connected to GND
SHDN pin is connected to VBATT
ONA pin is connected to GND
ONA pin is connected to VDD
ONB pin is connected to GND
ONB pin is connected to VDD
ONC pin is connected to GND
ONC pin is connected to VDD
OND pin is connected to GND
OND pin is connected to VDD
PIN CONTROL
Shutdown mode (all outputs disabled)
IC enabled (all outputs depend on SW1 position settings)
Disables VOUTA, VOUTA = 0V
Enables VOUTA, VOUTA = 5V
Disables VOUTB, VOUTB = 0V
Enables VOUTB, VOUTB = 1.8V
Disables VOUTC, VOUTC = 0V
Enables VOUTC, VOUTC = 1.05V
Disables VOUTD, VOUTD = 0V
Enables VOUTD, VOUTD = 0.9V
VOUTA
250kHz
375kHz
500kHz
The EV kit is shipped with FBD connected directly to
output voltage VOUTD. The voltage at FBD tracks the
REFIND voltage. The REFIND voltage is set to 0.9V (half
the output voltage at VOUTB) by resistor-divider R22
and R23.
To change the VOUTD output voltage to a value between
0.5V and 2V, remove R22. Calculate R22 using the fol-
lowing equation:
where R23 =10kI Q1%.
The switching frequency of the EV kit can be adjusted
by removing resistor R24 and installing a short across
resistors R20 or R21. As configured, the EV kit operates
at 0.5MHz (VOUTA and VOUTC) and at 1MHz switch-
ing frequency (VOUTB). When changing the switching
frequency, refer to the MAX17019 IC data sheet for the
proper component selections and calculations for the
inductors and output capacitors.
0.9V Output-Voltage Setting (VOUTD)
SWITCHING FREQUENCY
R22 = R23 [(VOUTB/VOUTD) - 1]
VOUTB
500kHz
750kHz
1MHz
IC OUTPUT
Frequency Selection (FREQ)
VOUTC
250kHz
375kHz
500kHz