Ultralow Power Boost Regulator with

MPPT and Charge Management

Data Sheet

ADP5090

Rev. C

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FEATURES

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

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

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

TYPICAL APPLICATION CIRCUIT

Figure 1.

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.

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.

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)

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.

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.

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.

SW

VIN

BAT

SYS

TERM

PGOOD

SETPG

MPPT

CBP

DIS_SW

SETSD

MINOP

REF

BACK_UP

OPTIONAL

PRIMARY

BATTERY

RECHARGEABLE

BATTERY OR

SUPERCAP

FROM MCU

TO MCU

COLD-START

CHARGE PUMP

BOOST

REGULATOR

CHARGE CONTROL

AND

POWER PATH

MANAGEMENT

MPPT

CONTROL

ADP5090

+

–

+

–

AGND PGND