Nexperia USA Inc. NEH2000BYJ

Overview

NEH2000BY from Nexperia is a fully integrated energy harvesting power management IC designed to extract micropower from photovoltaic cells and regulate charge into rechargeable batteries. It features a 2× boosting DC-DC converter, embedded hill-climbing MPPT with 0.7 s interval, 35 µW–2 mW input power range, and delivers regulated VBAT output up to 4.5 V. It enables battery-powered wireless IoT sensors in low-light indoor environments.

For engineers reviewing the NEH2000BY datasheet, NEH2000BY pinout, NEH2000BY application, or NEH2000BY equivalent, key selection criteria include ultra-low startup power (35 µW), MPPT update rate, battery voltage compatibility (2.5–4.5 V), and QFN16 thermal performance (R_θ(j-a) = 97 K/W).

Technical Context

The NEH2000BY implements a capacitive charge-pump-based 2× boost converter with no external inductor required, enabling minimal BOM count and high integration density. Its MPPT engine operates independently of harvester characteristics and dynamically tracks maximum power point every 0.7 s using an embedded hill-climbing algorithm.

Startup occurs within 50 ms after VBAT application, generating internal 1.8 V supply (VREF) and asserting SYSRDY high. The device supports battery voltages from 2.5 V to 4.5 V and includes DISABLE control for active harvesting shutdown when battery is full.

Key Specifications

Pinout & Package

NEH2000BY is housed in a 3 mm × 3 mm × 0.75 mm HWQFN16 package (SOT8076-1) with exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and offers R_θ(j-a) = 97 K/W for passive thermal management in space-constrained modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar energy harvesting PMIC applications.

Compared with SPV1050 and ADP5090, NEH2000BY delivers lowest system-level footprint and simplest layout due to its inductorless design and fastest MPPT response-critical for indoor light-harvesting where illumination changes rapidly and space is constrained.

Availability

NEH2000BY is available at Aetrix Electronics and suitable for wireless IoT sensors, electronic shelf labels, industrial monitoring nodes, and smart remote controls requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NEH2000BY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and power management devices, serving automotive, industrial, and consumer markets with scalable manufacturing.

The NEH2000BY belongs to Nexperia's Energy Harvesting PMIC product line, engineered specifically for ultra-low-power, space-constrained battery-charging applications powered by indoor photovoltaic sources.

FAQ

What is the minimum PV open-circuit voltage (VOC) compatible with NEH2000BY?

The optimal VOC is 0.69 × VBAT per design guidelines, so for a 3.0 V battery, VOC should be ~2.07 V. Absolute minimum VOC is not specified, but practical operation begins at ~1.65 V VIN (typical). Below 1.5 V, MPPT convergence time increases significantly and efficiency drops below 70%.

Can NEH2000BY operate without a battery connected?

No. The datasheet explicitly warns against applying VIN > 2 V with no battery connected, as this may damage the device. VBAT must be present before enabling harvesting; the IC relies on battery voltage for internal biasing and safe startup sequencing.

How does the DISABLE pin interface with over-voltage protection (OVP) circuits?

DISABLE is an active-low input referenced to GND. An OVP device should assert a logic HIGH signal when battery voltage exceeds threshold; this HIGH must be inverted (e.g., via N-channel MOSFET or buffer) to pull DISABLE low and halt harvesting. Direct connection of OVP output to DISABLE is invalid unless OVP outputs active-low.

Is VREF intended for external use as a precision reference?

No. VREF is an internal 1.8 V supply node used solely for on-chip regulation. The datasheet states "Do not use/load VREF in the application." It requires only a 2.2 µF decoupling capacitor and must not drive external circuitry, as loading degrades internal stability and start-up behavior.