Ultralow Power Boost Regulator with
MPPT and Charge Management
Data Sheet
ADP5090
FEATURES
TYPICAL APPLICATION CIRCUIT
Boost regulator with maximum power point tracking (MPPT)
Hysteretic controller for best ultralight load efficiency
320 nA ultralow quiescent current (CBP ≥ MINOP)
260 nA ultralow quiescent current (CBP < MINOP)
Input voltage operation range from 80 mV to 3.3 V
Cold start from 380 mV (typical) with charge pump
Open circuit voltage (OCV) sensing for MPPT
Programmable MPPT ratio for photovoltaic (PV) or
thermoelectric generator (TEG) energy sources
Programmable shutdown point on MINOP pin
Energy storage management
ADP5090
P
IN
P
SYS
SW
VIN
SYS
BAT
COLD-START
CHARGE PUMP
MPPT
CBP
RECHARGEABLE
+
–
MPPT
BOOST
BATTERY OR
CONTROL REGULATOR
SUPERCAP
MINOP
TO MCU
PGOOD
REF
CHARGE CONTROL
AND
POWER PATH
MANAGEMENT
DIS_SW
FROM MCU
SETSD
SETPG
TERM
BACK_UP
OPTIONAL
PRIMARY
BATTERY
+
–
AGND PGND
Programmable voltage monitor (2.2 V to 5.2 V) to support
charging and prevent overcharging or overdischarging
Power path management for an optional backup primary
cell battery connected to the BACK_UP pin
Figure 1.
Radio frequency (RF) transmission friendly
Temporary shutdown boost regulator via microcontroller
(MCU) communication
APPLICATIONS
PV cell energy harvesting
TEG energy harvesting
Battery regulator powered by solar panel
Industrial monitoring
Self powered wireless sensor devices
Portable and wearable devices with energy harvesting
GENERAL DESCRIPTION
The ADP5090 is an integrated boost regulator that converts dc
power from PV cells or TEGs. The device charges storage elements
such as rechargeable Li-Ion batteries, thin film batteries, super
capacitors, and conventional capacitors, and powers up small
electronic devices and battery-free systems.
enables boost shutdown during a low light condition. In addition,
the DIS_SW pin can temporarily shut down the boost regulator
and is RF transmission friendly.
The charging control function of ADP5090 protects rechargeable
energy storage, which is achieved by monitoring the battery
voltage with programmable charging termination voltage and
shutdown discharging voltage. In addition, a programmable
PGOOD flag monitors the SYS voltage.
The ADP5090 provides efficient conversion of the harvested
limited power from a 16 µW to 200 mW range with sub-µW
operation losses. With the internal cold-start circuit, the regulator
can start operating at an input voltage as low as 380 mV. After
cold startup, the regulator is functional at an input voltage range
of 80 mV to 3.3 V.
An optional primary cell battery can be connected and managed
by an integrated power path management control block that
automatically switches the power source from the energy harvester,
rechargeable battery, and primary cell battery.
By sensing the input voltage at the VIN pin, the control loop keeps
the input voltage ripple in a fixed range to maintain stable dc-
to-dc boost conversion. The VIN OCV sensing and programmable
regulation points of the input voltage allow extraction of the
highest possible energy from the PV cell or TEG harvester. A
programmable minimum operation threshold (MINOP)
The ADP5090 is available in a 16-lead, 3 mm × 3 mm LFCSP
and is rated for a −40°C to +125°C junction temperature range.
Rev. C
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