Analog Devices Inc. LTC3260MPMSE#TRPBF

Overview

LTC3260MPMSE#TRPBF from Analog Devices is a low-noise dual-polarity power supply IC integrating an inverting charge pump (–VIN or –0.94·VIN), a 50mA positive LDO+ (adjustable 1.2V–32V), and a 50mA negative LDO– (adjustable –32V to –1.2V), all operating from a single 4.5V–32V input. It delivers ±12V outputs from 15V input in instrumentation-grade bias supplies.

For engineers reviewing the LTC3260MPMSE#TRPBF datasheet, LTC3260MPMSE#TRPBF pinout, LTC3260MPMSE#TRPBF application, or LTC3260MPMSE#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, 100µA Burst Mode quiescent current with both LDOs active, 50kHz–500kHz programmable oscillator, LDO noise of 100µVRMS, and thermally enhanced 16-pin MSOP package with exposed GND pad.

Technical Context

The LTC3260MPMSE#TRPBF implements a two-stage architecture: a programmable-frequency (50–500kHz) inverting charge pump generates VOUT, which powers the negative LDO–, while VIN directly powers the positive LDO+. Its MODE pin selects between constant-frequency inversion (VOUT = –VIN) or Burst Mode regulation (VOUT ≈ –0.94·VIN) with hysteretic control.

Both LDOs use external resistor dividers for output voltage programming (ADJ+ = 1.200V, ADJ– = –1.200V), feature independent enable pins (EN+, EN–), and include dedicated reference bypass pins (BYP+, BYP–) for 100µVRMS noise reduction. Soft-start, short-circuit protection (160mA max), and thermal shutdown (175°C trip) are integrated.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND), 0.75mm profile, θJA = 43°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-polarity regulator applications.

Compared with LT3261EMSE#TRPBF and MAX1759EUB+T, the LTC3260MPMSE#TRPBF uniquely integrates both positive and negative LDOs with matched 100µVRMS noise, full 4.5V–32V input support, and –55°C to 150°C operation-making it the only drop-in solution for high-reliability bipolar bias generation in instrumentation and automotive domains.

Availability

LTC3260MPMSE#TRPBF is available at Aetrix Electronics and suitable for portable medical equipment, industrial instrumentation, and automotive sensor modules requiring stable component supply across extended temperature ranges.

Supply support for LTC3260MPMSE#TRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.

The LTC3260 belongs to Analog Devices' µPower and Precision Power Management product line, designed specifically for low-noise, wide-input, bipolar rail generation in demanding analog signal chains and harsh-environment applications.

FAQ

What is the maximum output current capability of the LTC3260MPMSE#TRPBF?

The LTC3260MPMSE#TRPBF provides up to 100mA from its inverting charge pump output (VOUT), and up to 50mA each from its positive LDO+ and negative LDO– regulators. The LDO– is powered from VOUT, so total system output is constrained by VOUT current capacity and LDO– dropout headroom. At full 50mA per LDO, VOUT must sustain ≥50mA plus LDO– quiescent current.

How does the MODE pin affect the operation of the LTC3260MPMSE#TRPBF?

The MODE pin selects between two distinct charge pump operating modes: logic high enables Burst Mode, regulating VOUT to –0.94·VIN with ~100µA quiescent current and higher output ripple; logic low enables constant-frequency mode, driving VOUT to –VIN at 50kHz–500kHz with lower ripple but higher IQ. Both modes retain full LDO regulation and protection features.

Can the LTC3260MPMSE#TRPBF generate asymmetric output voltages like +5V and –12V?

Yes, the LTC3260MPMSE#TRPBF supports independent output voltage programming: VLDO+ is set via ADJ+ (1.200V reference) and resistor divider to any value from 1.2V to 32V; VLDO– is set via ADJ– (–1.200V reference) to any value from –32V to –1.2V. This enables asymmetric rails such as +5V/–12V, provided VOUT remains ≥ |VLDO–| + VDROPOUT– (min 200mV at 50mA).

What is the purpose of the BYP+ and BYP– pins on the LTC3260MPMSE#TRPBF?

The BYP+ and BYP– pins connect to the internal +1.200V and –1.200V reference buffers. Adding a 10nF capacitor from each pin to GND filters reference noise, reducing LDO+ and LDO– output voltage noise to 100µVRMS. Leaving these pins floating results in higher noise; they must not be shorted or connected to other voltages.

Is the LTC3260MPMSE#TRPBF pin-compatible with other variants in the LTC3260 family?

Yes, the LTC3260MPMSE#TRPBF uses the same 16-pin MSOP package and identical pinout as all other MSOP variants (e.g., LTC3260EMSE#TRPBF, LTC3260HMSE#TRPBF). The only differences are temperature grade (–55°C to 150°C), screening, and qualification-electrical functionality and pin mapping are fully compatible.