MAX17019EVKIT+ Maxim Integrated, MAX17019EVKIT+ Datasheet - Page 5

• Manufacturer Part Number: MAX17019EVKIT+
• Description: Power Management IC Development Tools Maxim Evaluation Kit
• Manufacturer: Maxim Integrated
• Series: MAX17019r

Table 1. Switch SW1 Settings
Note: As configured, the MAX17019 EV kit is shipped with all
SW1 settings in the off position.
The switching frequency of the MAX17019 kit can be
adjusted by removing resistor R24 and installing a
short across resistors R20 or R21. As configured, the
MAX17019 EV kit operates at 0.5MHz (VOUTA and
VOUTC) and at 1MHz switching 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.
SW1-C
SW1-D
SW1-E
SW1-A
SW1-B
SW1
Off
On
Off
On
Off
On
Off
On
Off
On
SHDN pin is con-
nected to GND
SHDN pin is con-
nected to VBATT
ONA pin is con-
nected to GND
ONA pin is con-
nected to VDD
ONB pin is con-
nected to GND
ONB pin is con-
nected to VDD
ONC pin is con-
nected to GND
ONC pin is con-
nected to VDD
OND pin is con-
nected to GND
OND pin is con-
nected to VDD
PIN CONTROL
_______________________________________________________________________________________
Frequency Selection (FREQ)
Shutdown mode
(all outputs disabled)
MAX17019 enabled
(all outputs depend on
SW1 position settings)
Disables VOUTA,
VOUTA = 0V
Enables VOUTA,
VOUTA = 5V
Disables VOUTB,
VOUTB = 0V
Enables VOUTB,
VOUTB = 3.3V
Disables VOUTC,
VOUTC = 0V
Enables VOUTC,
VOUTC = 1.2V
Disables VOUTD,
VOUTD = 0V
Enables VOUTD,
VOUTD = 2.5V
MAX17019 OUTPUT
MAX17019 Evaluation Kit
Table 2. Switching-Frequency Selection
*Default position.
Table 3. Jumper JU1 Functions
*Default position.
The MAX17019 EV kit includes a jumper (JU3) to select
which of the step-down switching regulators (VOUTA–
VOUTC) powers the push-pull linear regulator (VOUTD).
By default, the 2.5V VOUTD output stage is powered
from the IND input when a shunt is installed across
jumper JU1 pins 1-2 or pins 1-3, but not pins 1-4.
A user may want to set up VOUTC to 2.5V and VOUTD
to 1.25V for DDR RAM use. VOUTC can be set for 2.5V
using the equation from the 1.2V Output-Voltage Setting
(VOUTC) section. For DDR RAM applications, VOUTD
can also track the REFIND voltage to provide a 1.25V
output. Remove R23 and replace R22 with a 0I resistor.
Under these two cases, JU1 may be configured to all
three settings.
Connected to VDD
through open resistor R24
Connected to REF
through open resistor R20
Connected to GND
through 0I resistor R21*
SHUNT POSITION
Source/Sink Linear-Regulator Input (IND)
1-2*
FREQ PIN
1-3
1-4
IND CONNECTS TO REGULATOR
VOUTC (only for custom setups
with VOUTC > VOUTD)
VOUTA
250kHz
375kHz
500kHz
SWITCHING FREQUENCY
VOUTA
VOUTB
VOUTB
500kHz
750kHz
1MHz
VOUTC
250kHz
375kHz
500kHz
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