MAX17710BEVKIT# Maxim Integrated, MAX17710BEVKIT# Datasheet - Page 15

• Manufacturer Part Number: MAX17710BEVKIT#
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Type: Energy Harvestingr
• Series: MAX17710r

Specifications of MAX17710BEVKIT#

• Product: Power Management Development Tools
• Tool Is For Evaluation Of: MAX17710
• Output Voltage: 1.8 V, 2.3 V, 3.3 V
• Output Current: 625 nA
• Part # Aliases: 90-NC01K#B00

The SEL1 pin selects at which voltage REG operates.
Connect SEL1 to BATT for 1.8V operation, three-state for
3.3V operation, or connect to GND for 2.3V operation.
Note that the voltage regulation value is latched when
enabled. To change the regulation voltage point, the reg-
ulator must be disabled and then reenabled. See
There are several cases when the system might overload
the cell, potentially causing damage. They are prevented
with the PCKP load switch block and external capacitor:
U During startup, when there is an inrush current due to
U When the cell is cold (such as -40NC), and due to
U If the system requires a load current higher than can be
The device provides cell undervoltage protection by
limiting the current from BATT to PCKP and guarantee-
ing that the cell voltage does not fall below 2.15V. In
Table 3. Regulator Output Voltage Selection
Table 4. PCKP Pin Capacitor Values by Application
*Capacitance value tolerances need to be considered.
Maxim Integrated
the application’s load and capacitance.
increased cell resistance, it is unable to support high-
load currents.
supported by the cell alone.
V
3.0
3.0
2.8
2.8
2.3
2.3
MIN
SEL1 PIN CONNECTION
Connect to BATT
Connect to GND
Energy-Harvesting Charger and Protector
Open circuit
PCKP Pin Capacitor Selection
Regulator Voltage Selection
t
TASK
5
5
5
5
5
5
(ms)
Table
3.
addition to voltage protection, the ramp of the PCKP
switch impedance is changed slowly (5ms to full on) to
gradually load the cell and not collapse the voltage on a
room-temperature cell. Because of these protection fea-
tures, an application can now support brief high-current
pulses by including a large capacitance at PCKP. This
allows support for pulse loads many times higher than
that naturally supported by the cell alone.
A large PCKP capacitance can be selected to support
a pulse load even while the cell is very cold, and would
normally be incapable of supporting a significant load.
Choose this capacitor according to
ing equation:
where:
I
t
minimum voltage of the load doing the task.
This equation assumes that the BATT impedance is high
and cannot support the load.
TASK
TASK
is the current required to sustain a required task,
is the time duration of the task, and V
I
TASK
C
2.5
10
8
4
5
5
REG PIN OUTPUT VOLTAGE (V)
PCKP
(mA)
= I
TASK
1.8
3.3
2.3
x t
TASK
MAX17710
/(3.7 - V
Table 4
C
PCKP
100
50
28
14
18
36
MIN
(µF)*
or the follow-
)
MIN
is the
15