Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Analog Devices Inc. LTC3890IGN-3#PBF

Name: LTC3890IGN-3#PBF
Brand: Analog Devices Inc.
SKU: LTC3890IGN-3#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LTC3890IGN-3#PBF

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 28-SSOP (0.154", 3.90mm Width)

Datasheet:: LTC3890IGN-3#PBF.pdf

Description:: IC REG CTRLR BUCK/SEPIC 28SSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,953

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LTC3890IGN-3#PBF from Analog Devices (formerly Linear Technology) is a dual, 2-phase synchronous step-down DC/DC controller driving all-N-channel MOSFET stages. It supports 4V–60V input, delivers two independent outputs (e.g., 3.3V/5A and 8.5V/3A), operates with 50µA quiescent current in single-channel sleep mode, and features out-of-phase operation to reduce input ripple-ideal for automotive always-on systems and battery-powered digital devices.

For engineers reviewing the LTC3890IGN-3#PBF datasheet, LTC3890IGN-3#PBF pinout, LTC3890IGN-3#PBF application, or LTC3890IGN-3#PBF equivalent, key selection criteria include its 75kHz–850kHz phase-lockable frequency range, RSENSE/DCR current sensing flexibility, selectable light-load modes (Burst/Pulse-Skipping/Continuous), 99% duty cycle dropout capability, and independent TRACK/SS pins for soft-start or voltage tracking.

Technical Context

The LTC3890IGN-3#PBF implements a constant-frequency current-mode architecture with two independent controllers operating 180° out-of-phase to minimize input capacitor stress and supply-induced noise. Each channel uses an error amplifier (EA) comparing VFB to a 0.800V reference, with ITH voltage setting peak inductor current trip point via differential SENSE+/- inputs.

It integrates dual gate drivers (TG/BG) with 2.5Ω pull-up and 1.5Ω pull-down on top-side drivers, internal 5.1V INTVCC LDO powered from VIN or EXTVCC (switchover at 4.7V), and programmable light-load behavior via PLLIN/MODE pin-supporting Burst Mode (≤0.8V), pulse-skipping (1.2V–INTVCC−1.3V), or forced continuous (tied to INTVCC).

Key Specifications

Parameter	Value and Actual Design Meaning
V_IN Range	4V to 60V - supports wide intermediate bus voltages and battery chemistries including 12V, 24V, and 48V systems.
I_Q (One Channel Active)	50µA - extends battery life in always-on applications without compromising startup responsiveness.
V_OUT Range	0.8V to 24V - enables flexible output configuration across logic, analog, and interface rails.
Switching Frequency	75kHz to 850kHz (phase-lockable) - allows EMI optimization and compact magnetics design.
Duty Cycle Max	99% - supports ultra-low dropout operation when VIN approaches VOUT, critical for high-efficiency buck conversion near input limits.
Current Sensing	RSENSE or DCR - provides design flexibility for accuracy vs. power loss trade-offs in high-current or space-constrained layouts.
Shutdown I_Q	<14µA - ensures minimal parasitic drain during system standby or deep-sleep states.

Pinout & Package

28-Lead Plastic SSOP package (GN), thermally enhanced for industrial and automotive ambient temperatures up to +125°C junction.

Pin/Terminal	Circuit Role	Design Meaning
ITH1, ITH2	Error amplifier output / current limit control	Sets per-channel peak inductor current threshold; voltage directly scales current sense trip point.
VFB1, VFB2	Feedback input	Compares output voltage (via resistor divider) to 0.800V internal reference for regulation.
SENSE1+, SENSE2+	Current sense positive input	Connects to high-side of current sense resistor or DCR network for accurate current monitoring.
SENSE1–, SENSE2–	Current sense negative input	Completes differential sensing path; supports common-mode voltages down to 0V.
PLLIN/MODE	Light-load mode select / sync input	Selects Burst Mode (GND), pulse-skipping (1.2V–INTVCC−1.3V), or forced continuous (INTVCC); accepts external clock for synchronization.
RUN1, RUN2	Independent enable control	Digital shutdown inputs: <1.15V disables one channel; both <0.7V enters ultra-low-I_Q shutdown (<14µA).
TRACK/SS1, TRACK/SS2	Soft-start and tracking control	Internal 1µA pull-up charges external capacitor for linear ramp; also accepts external voltage for output tracking.
PGOOD1	Power-good monitor	Open-drain output asserting low when VFB1 deviates >±10% from setpoint-supports system sequencing and fault detection.
TG1, TG2 / BG1, BG2	Top/bottom gate drivers	Drive N-channel MOSFETs with 2.5Ω/2.4Ω pull-up and 1.5Ω/1.1Ω pull-down; supports bootstrap operation up to 71V BOOST swing.
VIN, PGND, SGND	Main input / power ground / signal ground	Separate PGND (high-current return) and SGND (low-noise reference) routing required for stability and noise immunity.

Key Features

Feature	Design Value
Out-of-phase dual-channel operation	Reduces RMS input current by ~30%, enabling smaller input capacitors and lower EMI filter component count.
OPTI-LOOP® compensation	Allows stable loop response across wide range of output capacitance values and ESR, simplifying design for diverse ceramic/polymer cap selections.
Independent TRACK/SS pins	Enables per-channel soft-start timing control or precise voltage tracking between outputs or with external supplies-critical for FPGA/CPU rail sequencing.
Low-noise Burst Mode®	Maintains high efficiency at microamp loads while minimizing output voltage ripple and audible noise-essential for sensor and RF subsystems.
EXTVCC switchover	Automatically switches INTVCC power source from VIN to an external 4.7–14V supply (e.g., one of its own outputs), improving overall system efficiency by bypassing VIN LDO losses.

Applications

Automotive Infotainment Power Supply	Industrial PLC I/O Module
Use Scenario: Dual-rail power for SoC (1.2V core), DDR memory (1.35V), and display interface (3.3V) in head-unit ECUs with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary dual-phase buck controller managing 12V battery input to generate tightly regulated, sequenced outputs with robust load transient response. Use Value: 4V–60V input range survives load-dump and cold-crank events; 50µA I_Q preserves battery during vehicle sleep; out-of-phase operation reduces input ripple on shared 12V bus.	Use Scenario: Distributed 24V-to-5V/3.3V conversion for isolated digital I/O channels in modular automation controllers. IC Role / Device Role / Timing Role: High-efficiency, low-noise dual-output controller powering microcontrollers, isolators, and level translators in harsh EMI environments. Use Value: RSENSE/DCR flexibility accommodates legacy shunt-based current monitoring; PGOOD1 enables safe power-up sequencing; 125°C rating supports convection-cooled enclosures.
Battery-Powered Test Equipment	Distributed Telecom DC Power System
Use Scenario: Portable oscilloscope or multimeter requiring long runtime from Li-ion pack (8.4V–12.6V) while powering analog front-end (±5V), ADC (2.5V), and MCU (3.3V). IC Role / Device Role / Timing Role: Dual-controller managing main 3.3V system rail and auxiliary bias rails with independent soft-start and tracking. Use Value: 50µA sleep I_Q extends battery life; selectable light-load modes optimize efficiency across dynamic load profiles; TRACK/SS enables synchronized ramp for analog section stability.	Use Scenario: Intermediate bus converter in 48V telecom shelf supplying multiple 12V/5V point-of-load converters for baseband processing cards. IC Role / Device Role / Timing Role: High-voltage, high-efficiency dual-phase controller stepping 48V down to 12V/5V for downstream POL regulators. Use Value: 60V max input handles 48V transients; phase-lockable frequency enables coherent switching across multiple LTC3890IGN-3#PBF units to suppress beat frequencies; low EMI improves signal integrity.

Automotive Infotainment Power Supply

Industrial PLC I/O Module

Use Scenario: Dual-rail power for SoC (1.2V core), DDR memory (1.35V), and display interface (3.3V) in head-unit ECUs with cold-crank tolerance.

IC Role / Device Role / Timing Role: Primary dual-phase buck controller managing 12V battery input to generate tightly regulated, sequenced outputs with robust load transient response.

Use Value: 4V–60V input range survives load-dump and cold-crank events; 50µA I_Q preserves battery during vehicle sleep; out-of-phase operation reduces input ripple on shared 12V bus.

Use Scenario: Distributed 24V-to-5V/3.3V conversion for isolated digital I/O channels in modular automation controllers.

IC Role / Device Role / Timing Role: High-efficiency, low-noise dual-output controller powering microcontrollers, isolators, and level translators in harsh EMI environments.

Use Value: RSENSE/DCR flexibility accommodates legacy shunt-based current monitoring; PGOOD1 enables safe power-up sequencing; 125°C rating supports convection-cooled enclosures.

Battery-Powered Test Equipment

Distributed Telecom DC Power System

Use Scenario: Portable oscilloscope or multimeter requiring long runtime from Li-ion pack (8.4V–12.6V) while powering analog front-end (±5V), ADC (2.5V), and MCU (3.3V).

IC Role / Device Role / Timing Role: Dual-controller managing main 3.3V system rail and auxiliary bias rails with independent soft-start and tracking.

Use Value: 50µA sleep I_Q extends battery life; selectable light-load modes optimize efficiency across dynamic load profiles; TRACK/SS enables synchronized ramp for analog section stability.

Use Scenario: Intermediate bus converter in 48V telecom shelf supplying multiple 12V/5V point-of-load converters for baseband processing cards.

IC Role / Device Role / Timing Role: High-voltage, high-efficiency dual-phase controller stepping 48V down to 12V/5V for downstream POL regulators.

Use Value: 60V max input handles 48V transients; phase-lockable frequency enables coherent switching across multiple LTC3890IGN-3#PBF units to suppress beat frequencies; low EMI improves signal integrity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-phase synchronous buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC3890EGN-3#PBF	Same pinout, identical electrical specs, but rated for –40°C to 125°C (I-grade) instead of –40°C to 125°C industrial grade with tighter initial V_FB tolerance (±0.8% vs ±1.0%).	Preferred for cost-sensitive commercial applications where extended temperature validation is not required.	Select LTC3890IGN-3#PBF when full industrial temp qualification and traceable lot-level testing per AEC-Q200-aligned processes are mandated.
MP2918GL-Z	Single-chip dual-phase controller with integrated MOSFET drivers only; lacks RSENSE/DCR flexibility, no EXTVCC switchover, and fixed 300kHz–2MHz frequency range without PLL sync.	Suitable for compact, low-cost consumer power modules where layout area and BOM count are prioritized over configurability and ultra-low I_Q.	Choose LTC3890IGN-3#PBF when design requires 50µA I_Q, 4V–60V input, or precise light-load mode control not available in monolithic alternatives.

Compared with LTC3890EGN-3#PBF, the LTC3890IGN-3#PBF offers verified industrial-grade reliability and tighter feedback tolerance; versus MP2918GL-Z, it delivers superior input voltage range, lower quiescent current, and greater system-level flexibility through discrete MOSFET drive and multi-mode light-load control.

Availability

LTC3890IGN-3#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and battery-powered test equipment requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for LTC3890IGN-3#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 full product continuity, technical documentation, and manufacturing for the LTC portfolio. Linear's legacy expertise in precision power management remains central to ADI's high-performance analog roadmap.

The LTC3890IGN-3#PBF belongs to the LTC3890 family of dual-phase synchronous buck controllers designed specifically for high-efficiency, low-quiescent-current power conversion in automotive, industrial, and battery-operated systems demanding wide input range and flexible light-load operation.

FAQ

What is the maximum input voltage rating for the LTC3890IGN-3#PBF?

The LTC3890IGN-3#PBF has an absolute maximum input supply voltage (VIN) rating of 65V, with a recommended operating range of 4V to 60V. This wide range supports 12V, 24V, and 48V battery and bus architectures, including automotive cold-crank and load-dump conditions. Exceeding 65V risks permanent damage per Absolute Maximum Ratings.

Does the LTC3890IGN-3#PBF support phase synchronization with external clocks?

Yes, the LTC3890IGN-3#PBF supports external clock synchronization via the PLLIN/MODE pin. When an external clock signal is applied, the internal phase-locked loop aligns the rising edge of TG1 to that clock's rising edge. This enables coherent switching across multiple LTC3890IGN-3#PBF units or with other system clocks to suppress beat frequencies and simplify EMI filtering.

How does the LTC3890IGN-3#PBF achieve ultra-low quiescent current?

The LTC3890IGN-3#PBF achieves 50µA quiescent current with one channel active and <14µA in full shutdown by disabling non-essential circuitry-including gate drivers, oscillators, and error amplifiers-during light-load or shutdown states. Its proprietary Burst Mode® operation parks the ITH pin at 0.450V and disconnects the EA output, minimizing static current draw while retaining fast wake-up capability.

Can the LTC3890IGN-3#PBF drive both high-side and low-side N-channel MOSFETs?

Yes, the LTC3890IGN-3#PBF integrates dual high-current gate drivers for both top-side (TG1/TG2) and bottom-side (BG1/BG2) N-channel MOSFETs. TG outputs operate as floating drivers with voltage swing equal to INTVCC − 0.5V superimposed on SW node voltage; BG outputs swing from PGND to INTVCC. Bootstrap capacitors and Schottky diodes are required for high-side drive.

What is the function of the TRACK/SS pins on the LTC3890IGN-3#PBF?

The TRACK/SS1 and TRACK/SS2 pins on the LTC3890IGN-3#PBF provide per-channel soft-start and voltage tracking capability. An internal 1µA current source charges an external capacitor to generate a linear voltage ramp, controlling output rise time. Alternatively, connecting an external voltage divider allows the LTC3890IGN-3#PBF output to track another supply during startup-enabling safe sequencing of FPGAs, processors, or mixed-signal ICs.

LTC3890IGN-3#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 28-SSOP (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Output Type:: Transistor Driver

Function:: Step-Down, Step-Up/Step-Down

Output Configuration:: Positive

Topology:: Buck, SEPIC

Number of Outputs:: 2

Output Phases:: 2

Voltage - Supply (Vcc/Vdd):: 4V ~ 60V

Frequency - Switching:: 105kHz ~ 835kHz, 350kHz ~ 535kHz

Duty Cycle (Max):: 99%

Synchronous Rectifier:: Yes

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Enable, Frequency Control, Power Good, Soft Start, Tracking

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SSOP

LTC3890IGN-3#PBF FAQ

1.How can I place an order for LTC3890IGN-3#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3890IGN-3#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC3890IGN-3#PBF reliable?

The price and inventory of LTC3890IGN-3#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3890IGN-3#PBF is usually 5 days.

3.What payment methods are accepted for LTC3890IGN-3#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3890IGN-3#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3890IGN-3#PBF?

LTC3890IGN-3#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3890IGN-3#PBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC3890IGN-3#PBF?

For technical support, including LTC3890IGN-3#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3890IGN-3#PBF requirements.

6.How does Aetrix verify that LTC3890IGN-3#PBF is sourced from the original manufacturer or authorized distributors?

All LTC3890IGN-3#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3890IGN-3#PBF meets industry standards.

7.What is the process for return or replacement of LTC3890IGN-3#PBF?

All LTC3890IGN-3#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3890IGN-3#PBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC3890IGN-3#PBF part is unused and in its original packaging.

Return procedure for LTC3890IGN-3#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…