MAX16046EVKIT+ Maxim Integrated Products, MAX16046EVKIT+ Datasheet - Page 15

• Manufacturer Part Number: MAX16046EVKIT+
• Description: IC EE-PROG SYS MGR 12CH 56-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX16046EVKIT+

• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Utilized Ic / Part: MAX16046, MAX16048
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX16046 has both a JTAG interface and an I
serial interface. The slave address of the on-board
MAX16046 can be set using J1 according to Table 5.
The MAX16046 EV kit includes two on-board LDO
power supplies. LDO1 is connected to channel 2
(EN_OUT2/MON2/DACOUT2) and LDO2 is connected
to channel 3 (EN_OUT3/MON3/DACOUT3).
LDO1 is a MAX1658 voltage regulator equipped with
feedback resistors R2 and R8 to set the output voltage
to 3.3V. A series resistor, R9, connects the LDO feed-
back node to DACOUT2 to facilitate margining. To
completely disconnect LDO1 from EN_OUT2, MON2,
and DACOUT2, remove R9 and cut the traces shorting
R12 and R13. To modify the output voltage, calculate
the new values for resistors R2 and R8 by either using
the margining calculator feature of the MAX16046 EV kit
software, or the following formulas:
LDO2 is identical to LDO1 except the output voltage is
set using R1 and R6 to 2.5V. R7 connects LDO2 to
DACOUT3 for margining. To disconnect LDO2 from
EN_OUT3, MON3, and DACOUT3, remove R7 and cut
the traces shorting R10 and R14.
The shutdown connection on LDO1 and LDO2, SHDN,
is active low. This is equivalent to an active-high enable
connection. In the MAX16046 EV kit software, set the
enable output type to active-high push-pull. The output
must be push-pull since there is no pullup resistor.
Each LDO has a 475Ω load resistor: R5 for LDO1 and
R4 for LDO2.
Headers P3 and P4 provide access to the EN_OUT_,
MON_, and DACOUT_ connections for each LDO.
The MAX16046 EV kit includes two tracking n-channel
MOSFETs that facilitate evaluation of the MAX16046’s
closed-loop slew-rate-controlled tracking capability as
well as the open-loop charge-pump capability. FET Q1
is connected to EN_OUT1, MON1, and INS1 (GPIO1),
and FET Q2 is connected to EN_OUT4, MON4, and
INS4 (GPIO4).
V
V
OUT
OUT
1
2
On-Board LDO Power Supplies
=
______________________________________________________________________________________
= . . 21
On-Board Tracking MOSFETs
1 21
1
.
×
×
⎛
⎝ ⎜
⎛
⎝ ⎜
1
1
+
+
R
R
R
R
2
8
6
1
⎞
⎠ ⎟
⎞
⎠ ⎟
Serial Interfaces
(
(
LDO
LDO
1
2
)
)
2
C
MAX16046 Evaluation Kit
Power to FET Q1 is controlled by J8, and power to FET
Q2 is controlled by J7. Position 1-2 connects the input
(drain) side of the MOSFET to the V
J100, and position 2-3 connects to the USB interface’s
3.3V regulator output. Remove the jumper to provide an
external input voltage to the MON connection of head-
ers P10 and P9.
Since the source side of each MOSFET is monitored by a
GPIO configured as an INS (in sense) input in closed-loop
tracking mode, the LED and pullup resistor normally asso-
ciated with that GPIO must be disconnected. Jumpers J3
and J4, in position 1-2, disconnect the LED and pullup
resistor and connect to the source sides of the FETs. In
position 2-3, normal GPIO functionality is restored.
When using the MOSFETs in the open-loop charge-
pump-output configuration, the INS_ (GPIO) connec-
tions can safely be disconnected by shifting jumper J3
or J4, as appropriate, to the 2-3 position, allowing the
associated GPIO to be used for another function. In the
2-3 position, the MOSFET channel’s output capacitor
and load resistor are disconnected.
To disconnect the tracking MOSFETs entirely, remove
jumpers J5 and J6. To disconnect the MOSFETs from
MON1 and MON4, set jumpers J3 and J4 to their 2-3
positions.
Access to the MOSFET drain, gate, and source is pro-
vided through headers P10 and P9. MON_ connects to
the drain, EN_OUT_ connects to the gate, and OP_
connects to the source. Connecting an oscilloscope
probe to an OP_ connection will show the tracking out-
put voltage for that MOSFET channel. A load can also
be connected to OP_ to evaluate the behavior of
closed-loop tracking under varying load conditions.
Each of the MON_ inputs, EN_OUT_ outputs, and
DACOUT_ outputs not used for the two on-board LDOs
and two on-board tracking FETs can be accessed
through headers P7 (EN_OUTs), P5 (MONs), and P8
(DACOUTs).
The switch bank, S1, allows EN_OUT5–EN_OUT12 to
be connected to MON5–MON12 to help evaluate the
MAX16046’s sequencing feature. Configure the
EN_OUT_s for active-high push-pull, and configure the
voltage thresholds of the MON_s to correspond with the
output logic levels.
Monitoring Inputs, Enable Outputs, and
CC
DAC Outputs
supply set by
15