Analog Devices Inc. LTC3588EDD-1#PBF

Overview

LTC3588EDD-1#PBF from Analog Devices (formerly Linear Technology) is an ultralow-quiescent-current energy harvesting power supply IC integrating a full-wave bridge rectifier and hysteretic buck regulator. It targets high-impedance AC sources (e.g., piezoelectric transducers), operates from 2.7V–20V input, delivers up to 100mA at pin-selectable outputs (1.8V/2.5V/3.3V/3.6V), and features 450nA UVLO quiescent current - enabling efficient charge accumulation for wireless sensor nodes.

For engineers reviewing the LTC3588EDD-1#PBF datasheet, LTC3588EDD-1#PBF pinout, LTC3588EDD-1#PBF application, or LTC3588EDD-1#PBF equivalent, key selection criteria include input voltage hysteresis window (≥1.0V), integrated 20V shunt protection, nanopower sleep mode (950nA in regulation), output voltage select logic (D0/D1), and DFN-10 package thermal performance (θJA = 43°C/W).

Technical Context

The LTC3588EDD-1#PBF implements a two-stage energy harvesting architecture: first, a low-loss internal full-wave bridge rectifies AC inputs (PZ1/PZ2) with ≤450mV total drop at 10µA; second, a synchronous hysteretic buck converter regulates output using VOUT-sense feedback and internal PMOS/NMOS switches (RP = 1.1Ω, RN = 1.3Ω). No external clock or compensation is required.

Its UVLO control uses wide hysteresis (e.g., 4.04V rising / 2.87V falling for 2.5V output) to prevent short cycling during low-energy accumulation. Sleep mode activates when VOUT reaches regulation, reducing input quiescent current to 950nA and output leakage to ≤89nA - critical for multi-day batteryless operation in intermittent vibration environments.

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11 = GND), θJA = 43°C/W, rated for –40°C to +125°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX17710G+T and BQ25504RGTT, the LTC3588EDD-1#PBF uniquely integrates a low-drop bridge rectifier and nanopower UVLO for direct piezo interfacing - eliminating external components and enabling simpler, smaller, and more efficient designs for vibration-powered sensors.

Availability

LTC3588EDD-1#PBF is available at Aetrix Electronics and suitable for piezoelectric wireless sensor nodes, industrial asset tracking tags, and tire pressure monitoring systems requiring stable component supply across automotive, industrial, and IoT production programs.

Supply support for LTC3588EDD-1#PBF 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

Analog Devices acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio. Linear pioneered high-efficiency, low-quiescent-current power solutions for demanding embedded applications.

The LTC3588-1 product line was designed specifically for ambient energy harvesting - targeting batteryless operation in wireless sensors, condition monitoring, and industrial IoT where µA-level source currents and wide input voltage ranges are typical.

FAQ

What is the minimum input voltage required for the LTC3588EDD-1#PBF to begin regulation?

The LTC3588EDD-1#PBF starts regulation when VIN rises above the UVLO rising threshold, which depends on the selected output voltage: 3.77V for 1.8V output, 4.04V for 2.5V, 4.73V for 3.3V, and 5.05V for 3.6V (typical values at 25°C). Below these thresholds, the device remains in UVLO mode with only 450nA quiescent current, allowing energy to accumulate on the input capacitor.

Can the LTC3588EDD-1#PBF operate with a single-ended DC input instead of an AC piezoelectric source?

Yes - the LTC3588EDD-1#PBF can accept a single-ended DC input applied to the PZ1 pin while leaving PZ2 grounded, effectively using one side of the internal bridge rectifier. However, the full bridge configuration (PZ1/PZ2 differential) is required for true AC harvesting; DC input bypasses rectification but still benefits from the buck regulator's nanopower efficiency and 20V shunt protection.

How does the PGOOD pin behave when the input voltage drops below UVLO falling threshold?

When VIN falls below the UVLO falling threshold, the LTC3588EDD-1#PBF disables the buck converter but holds PGOOD high until VOUT drops to 92% of the selected output voltage. This allows downstream circuitry (e.g., an MCU) to complete critical tasks using residual energy stored in the output capacitor, providing graceful shutdown without abrupt power loss.

What is the recommended inductor value and type for the LTC3588EDD-1#PBF buck stage?

The LTC3588EDD-1#PBF datasheet specifies a minimum inductor value of 10µH, with shielded power inductors (e.g., Coilcraft XAL series or Würth WE-PD) recommended to minimize EMI and saturation. Inductor DCR should be ≤100mΩ to preserve efficiency at 100mA load; typical designs use 10µH–22µH with 200mA–500mA saturation current rating.

Is the LTC3588EDD-1#PBF RoHS-compliant and lead-free?

Yes - the LTC3588EDD-1#PBF carries the #PBF suffix, indicating it is lead-free and RoHS-compliant per EU Directive 2011/65/EU. The device uses matte tin (Sn) lead finish, and the DFN package meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for standard SMT assembly.