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Analog Devices Inc. LTC3890MPGN-1#TRPBF
- Part No.:
- LTC3890MPGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3890MPGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,628
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Product details
Overview
LTC3890MPGN-1#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance dual-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 LTC3890MPGN-1#TRPBF datasheet, LTC3890MPGN-1#TRPBF pinout, LTC3890MPGN-1#TRPBF application, or LTC3890MPGN-1#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, dual-channel phase-lockable frequency (75–850 kHz), RSENSE/DCR current sensing flexibility, and programmable light-load modes (Burst Mode®, pulse-skipping, or forced continuous).
Technical Context
The LTC3890MPGN-1#TRPBF implements a constant-frequency current-mode architecture with two independent 180° out-of-phase controllers, minimizing input capacitor requirements and supply-induced noise. Each channel uses an error amplifier (EA) with OPTI-LOOP® compensation, a transconductance gm of 2 mmho, and a regulated feedback voltage of 0.792–0.812 V across temperature.
It integrates dual gate drivers (TG/BG) with 2.5 Ω pull-up and 1.5 Ω pull-down on TG, 2.4 Ω/1.1 Ω on BG, minimum on-time of 95 ns, and internal LDOs supporting both VIN- and EXTVCC-derived INTVCC (5.1 V ±3%). The device includes dedicated SENSE+/– differential inputs per channel, independent TRACK/SS pins for soft-start or tracking, and PGOOD1 monitoring with ±10% trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 60 V - supports wide battery chemistries (12 V, 24 V, 48 V buses) and withstands 65 V abs max transients. |
| Quiescent Current (1 ch active) | 50 µA - extends runtime in always-on automotive or IoT edge nodes with single-output operation. |
| Output Voltage Range | 0.8 V ≤ VOUT ≤ 24 V - enables generation of core, I/O, and auxiliary rails from one controller. |
| Switching Frequency Range | 75 kHz to 850 kHz - adjustable via resistor or external clock; out-of-phase operation cuts input ripple by ~70% vs in-phase. |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive, industrial control, and harsh-environment power systems. |
| Current Sensing | RSENSE or DCR - flexible layout integration; supports low-loss ceramic capacitors and high-efficiency planar inductors. |
| Light-Load Modes | Burst Mode®, pulse-skipping, or forced continuous - selectable per PLLIN/MODE pin; Burst Mode achieves >85% efficiency at 200 µA load. |
Pinout & Package
Package: 28-lead plastic SSOP (GN), 5.3 mm × 10.2 mm, exposed pad for thermal enhancement. RoHS-compliant, lead-free finish, tape-and-reel packaging (#TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ITH1, ITH2 (1, 13) | Error amplifier output / compensation node | Controls peak inductor current per channel; connects to RC network for loop stability optimization. |
| VFB1, VFB2 (2, 12) | Feedback input | Monitors output voltage via resistive divider; regulated to 0.792–0.812 V reference across temp range. |
| SENSE1+, SENSE2+ (3, 11) | Current sense (+) input | Connects to high-side of sense resistor or DCR network; sets current limit threshold with SENSE–. |
| SENSE1–, SENSE2– (4, 10) | Current sense (–) input | Provides common-mode reference; bias current <±1 µA ensures accuracy with low-value sense resistors. |
| FREQ (5) | Frequency programming | Resistor-to-GND sets 50–900 kHz; GND = 350 kHz, INTVCC = 535 kHz - enables EMI tuning without external clock. |
| PLLIN/MODE (6) | Sync input / light-load mode select | Accepts external clock (75–850 kHz) or DC voltage: GND = Burst Mode, INTVCC = forced CCM, 1.2–3.8 V = pulse-skipping. |
| RUN1, RUN2 (8, 9) | Digital enable/disable | Independent channel control; <1.15 V shuts down channel; <0.7 V disables full IC with 14 µA shutdown IQ. |
| TRACK/SS1, TRACK/SS2 (14, 28) | Soft-start / tracking input | Internal 1 µA pull-up charges external cap for linear ramp; also accepts resistor divider for supply tracking. |
| PGOOD1 (27) | Power-good indicator | Open-drain output asserts low when VFB1 deviates >±10% from setpoint - enables sequencing or fault reporting. |
| TG1, TG2 (15, 26) | Top gate driver output | Drives N-channel high-side MOSFET gates; swing = INTVCC – 0.5 V superimposed on SW node - requires bootstrap capacitor. |
| BG1, BG2 (18, 23) | Bottom gate driver output | Drives N-channel low-side MOSFET gates; swing = 0 V to INTVCC - directly referenced to PGND. |
| SW1, SW2 (16, 25) | Switch node | Connects to inductor and bootstrap capacitor; handles high dv/dt; must be routed with minimal loop area. |
| BOOST1, BOOST2 (17, 24) | Bootstrap supply | Charged via external Schottky diode during low-side conduction; supplies floating top-gate drive. |
| VIN (22) | Main input supply | Primary power source for INTVCC LDO and logic; bypassed with ≥4.7 µF ceramic to SGND. |
| EXTVCC (20) | External bias input | Enables higher-efficiency INTVCC sourcing (e.g., from output rail); switchover at 4.7 V with 250 mV hysteresis. |
| INTVCC (19) | Internal LDO output | 5.1 V ±3% regulated supply for drivers and analog circuitry; requires ≥4.7 µF low-ESR decoupling. |
| PGND (21) | Power ground | High-current return path for bottom FETs and input capacitors - must be separate from SGND plane. |
| SGND (7) | Signal ground | Analog reference for feedback, error amp, and sense circuits - routed separately to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Out-of-phase dual controllers | Reduces RMS input current ripple by up to 70%, allowing smaller input bulk capacitors and lower EMI filter cost. |
| 50 µA no-load IQ (1 ch) | Extends battery life in always-on applications such as telematics, ADAS sensors, and remote monitoring nodes. |
| Programmable light-load operation | Three selectable modes (Burst, pulse-skipping, forced CCM) optimize efficiency vs. noise vs. transient response per system need. |
| 0.792–0.812 V feedback reference | High-accuracy reference with <±0.1% load regulation enables tight output tolerance without post-regulation. |
| 99% duty cycle capability | Supports ultra-low dropout operation (e.g., 12 V → 11.5 V), critical for backup power paths and brownout recovery. |
| Independent TRACK/SS pins | Enables precise power sequencing (e.g., core before I/O) or voltage tracking between multiple rails without external ICs. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Dual-rail power for SoC (1.2 V core), DDR memory (1.35 V), and display interface (3.3 V) in head-unit ECUs. IC Role / Device Role / Timing Role: Dual-phase controller generating 1.2 V/6 A and 3.3 V/3 A from 12 V battery with synchronized switching to minimize conducted EMI. Use Value: Out-of-phase operation reduces input ripple by 70%, enabling smaller 10 µF ceramic input caps instead of 47 µF tantalum - improving reliability and space savings. | Use Scenario: Distributed 24 V DC input powering isolated 5 V logic, 12 V analog sensors, and 3.3 V microcontroller in factory automation modules. IC Role / Device Role / Timing Role: Primary buck controller delivering 5 V/4 A and 12 V/2 A with independent soft-start to prevent inrush current overload on shared 24 V bus. Use Value: Independent RUN1/RUN2 pins allow dynamic enable/disable of sensor rails during sleep cycles, cutting system standby power by 40%. |
| Battery-Powered Test Equipment | Ruggedized Edge AI Gateway |
Use Scenario: Portable oscilloscope requiring ultra-low-noise 3.3 V analog rail and efficient 5 V digital rail from Li-ion (8–12.6 V) pack. IC Role / Device Role / Timing Role: Dual controller operating in Burst Mode® at light loads to maintain >88% efficiency down to 100 µA, while forced CCM ensures low ripple during signal acquisition. Use Value: 50 µA single-channel IQ extends battery runtime to >12 hours; RSENSE/DCR flexibility allows optimal trade-off between sense loss and PCB area. | Use Scenario: Fanless edge gateway deployed in transportation or energy infrastructure with ambient temps from –40°C to +85°C. IC Role / Device Role / Timing Role: Main power controller delivering 1.8 V/8 A (FPGA core) and 5 V/3 A (USB/PCIe) from 48 V PoE++ or battery input. Use Value: –55°C to +150°C qualification ensures stable operation during cold start and sustained high-temp operation; EXTVCC support enables self-bias from 5 V rail for >92% system efficiency. |
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 |
|---|---|---|---|
| LTC3890IGN-1#TRPBF | Same architecture and pinout; rated for –40°C to +125°C (vs. –55°C to +150°C). | Suitable for commercial/industrial environments but not extended-temperature automotive or aerospace. | Select when full MP-grade temp range is unnecessary and cost sensitivity is higher. |
| MP2918GL-Z | Single-chip dual-phase controller with integrated MOSFET drivers; lacks EXTVCC input and independent TRACK/SS pins. | Targeted at compact consumer electronics; no automotive qualification or extended temp support. | Choose only for space-constrained, non-automotive designs where integrated FETs simplify layout. |
Compared with LTC3890IGN-1#TRPBF, the LTC3890MPGN-1#TRPBF provides guaranteed operation down to –55°C and up to +150°C junction temperature, making it suitable for under-hood automotive use; compared with MP2918GL-Z, it offers superior thermal robustness, flexible biasing (EXTVCC), and independent sequencing control - critical for mission-critical industrial and transportation systems.
Availability
LTC3890MPGN-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, battery-powered test equipment, and ruggedized edge AI gateways requiring stable component supply across extreme temperature ranges and long production lifecycles.
Supply support for LTC3890MPGN-1#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LTC3890 family is designed for high-efficiency, high-reliability dual-output DC/DC conversion in harsh environments - emphasizing ultra-low IQ, wide VIN range, extended temperature operation, and flexible control for automotive and industrial power systems.
FAQ
What is the maximum input voltage rating for the LTC3890MPGN-1#TRPBF?
The LTC3890MPGN-1#TRPBF has an absolute maximum input supply voltage (VIN) of 65 V, with a recommended operating range of 4 V to 60 V. This allows robust operation across 12 V, 24 V, and 48 V battery and bus systems, including automotive cold-crank and load-dump transients when properly clamped externally.
Does the LTC3890MPGN-1#TRPBF support synchronization to an external clock?
Yes, the LTC3890MPGN-1#TRPBF supports external synchronization via the PLLIN/MODE pin, accepting clock signals from 75 kHz to 850 kHz. When an external clock is applied, the phase-locked loop aligns the rising edge of TG1 with the external clock's rising edge - enabling EMI reduction through frequency dithering or system-level timing coordination.
How does the LTC3890MPGN-1#TRPBF achieve ultra-low quiescent current?
The LTC3890MPGN-1#TRPBF achieves 50 µA quiescent current with one channel active by entering Sleep Mode: the error amplifier disconnects from ITH, internal circuitry powers down, and gate drivers halt. In full shutdown (both RUN pins <0.7 V), IQ drops to <14 µA - validated across its –55°C to +150°C operating range.
Can the LTC3890MPGN-1#TRPBF drive high-side N-channel MOSFETs without external level shifters?
Yes, the LTC3890MPGN-1#TRPBF integrates floating high-side gate drivers (TG1/TG2) with bootstrap circuitry. Each TG pin delivers a voltage swing equal to INTVCC – 0.5 V superimposed on the SW node, enabling direct drive of N-channel MOSFETs without external level shifters - provided proper bootstrap capacitor and Schottky diode are used per channel.
What is the function of the EXTVCC pin on the LTC3890MPGN-1#TRPBF?
The EXTVCC pin on the LTC3890MPGN-1#TRPBF allows the internal INTVCC LDO to be powered from an external supply (e.g., one of the LTC3890MPGN-1#TRPBF's own output rails). When EXTVCC exceeds 4.7 V, the VIN-based LDO turns off and the EXTVCC-based LDO activates - improving overall system efficiency by avoiding linear regulation losses from high VIN.
LTC3890MPGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
LTC3890MPGN-1#TRPBF FAQ
1.How can I place an order for LTC3890MPGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3890MPGN-1#TRPBF 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 LTC3890MPGN-1#TRPBF reliable?
The price and inventory of LTC3890MPGN-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3890MPGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3890MPGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3890MPGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3890MPGN-1#TRPBF?
LTC3890MPGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3890MPGN-1#TRPBF 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 LTC3890MPGN-1#TRPBF?
For technical support, including LTC3890MPGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3890MPGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3890MPGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3890MPGN-1#TRPBF 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 LTC3890MPGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3890MPGN-1#TRPBF?
All LTC3890MPGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3890MPGN-1#TRPBF, 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 LTC3890MPGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3890MPGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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