Analog Devices Inc. LTC3588EMSE-1#PBF

Overview

LTC3588EMSE-1#PBF from Analog Devices (formerly Linear Technology) is an ultralow-quiescent-current energy harvesting power supply IC integrating a low-loss full-wave bridge rectifier and a hysteretic synchronous buck regulator. It operates from 2.7V–20V input, delivers up to 100mA continuous output at pin-selectable voltages (1.8V/2.5V/3.3V/3.6V), and features 450nA UVLO quiescent current - optimized for piezoelectric, electro-mechanical, and low-power ambient energy sources in wireless sensor nodes.

For engineers reviewing the LTC3588EMSE-1#PBF datasheet, LTC3588EMSE-1#PBF pinout, LTC3588EMSE-1#PBF application, or LTC3588EMSE-1#PBF equivalent, key selection criteria include input voltage hysteresis window (≥1.0V), 950nA regulation quiescent current, integrated 20V input shunt protection, PGOOD logic-level output referenced to VOUT, and eMSOP-10 package compatibility with nanopower PCB layouts.

Technical Context

The LTC3588EMSE-1#PBF implements a two-stage energy harvesting architecture: first, a differential PZ1/PZ2 full-wave bridge rectifies AC inputs (e.g., piezoelectric transducers) into a DC reservoir on VIN; second, a hysteretic buck converter transfers stored energy to VOUT only when VIN exceeds a programmable UVLO rising threshold (3.77V–5.05V depending on output voltage). This eliminates continuous switching losses.

Internal rail generation provides CAP (VIN–4.8V) for PMOS gate drive and VIN2 (4.8V above GND, clamped to VIN if <4.8V) for NMOS drive and D0/D1 logic reference. Sleep mode reduces total input quiescent current to 950nA while maintaining regulation via VOUT sensing and wake-up based on ±12mV hysteresis around the selected output voltage.

Key Specifications

Pinout & Package

Package: 10-Lead Plastic eMSOP (MSE), 3mm × 3mm footprint, exposed pad (Pin 11) connected to GND. Thermal resistance θ_JA = 45°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP5090ACPZ-1-R7 and BQ25504RGTT, the LTC3588EMSE-1#PBF uniquely combines 450nA UVLO IQ, integrated piezo-optimized bridge, and pin-selectable output voltages - making it the only solution capable of reliable startup from sub-1µA piezoelectric sources without external components.

Availability

LTC3588EMSE-1#PBF is available at Aetrix Electronics and suitable for piezoelectric wireless sensors, industrial tire pressure monitors, and remote light switches requiring stable component supply across extended product lifecycles.

Supply support for LTC3588EMSE-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 legacy of high-performance analog and power management ICs with rigorous automotive and industrial qualification.

The LTC3588-1 product line was designed specifically for ambient energy harvesting applications - targeting batteryless operation in wireless IoT sensors, industrial monitoring, and asset tracking where µA-level source currents and long-term reliability are critical.

FAQ

What is the minimum input current required for LTC3588EMSE-1#PBF to exit UVLO and begin regulation?

The LTC3588EMSE-1#PBF exits UVLO when VIN rises above the rising threshold (e.g., 4.04V for 2.5V output), which depends on D0/D1 configuration. No minimum input *current* is specified - it starts regulation as soon as VIN crosses the threshold, even with nanoampere-level charging currents from piezoelectric sources. The 450nA UVLO quiescent current ensures minimal drain during accumulation.

Can LTC3588EMSE-1#PBF operate with a single-ended DC input instead of AC piezoelectric input?

Yes, LTC3588EMSE-1#PBF supports single-ended DC input: connect the source to PZ1 and tie PZ2 to GND (or vice versa). The internal bridge rectifier functions as a low-drop diode in this mode. Do not short PZ1 and PZ2 together. VIN must still remain within 2.7V–20V, and the 20V shunt remains active.

How does the PGOOD pin behave when the input source is disconnected after regulation is achieved?

Once LTC3588EMSE-1#PBF reaches regulation, PGOOD goes high and remains high until VOUT falls to 92% of the selected output voltage - even if VIN drops below UVLO falling threshold. This allows downstream circuitry to continue operating using stored energy in the output capacitor after input loss.

What is the maximum inductor value recommended for LTC3588EMSE-1#PBF, and why?

The LTC3588EMSE-1#PBF datasheet specifies a minimum inductor value of 10µH but does not define a hard maximum. Larger inductors (e.g., 47µH–100µH) reduce peak switch current and ripple, improving efficiency at light loads - however, they increase start-up time and may limit peak output current capability. Use 10µH for fastest response; 47µH for lowest IQ trade-off.

Is LTC3588EMSE-1#PBF RoHS-compliant and lead-free?

Yes, LTC3588EMSE-1#PBF is RoHS-compliant and features a lead-free finish. The "#PBF" suffix explicitly denotes lead-free packaging per Analog Devices' standard marking convention. The eMSOP package uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 1.