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Analog Devices Inc. LTC3890MPUH-2#TRPBF
- Part No.:
- LTC3890MPUH-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3890MPUH-2#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK/SEPIC 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,200
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Product details
Overview
LTC3890MPUH-2#TRPBF from Analog Devices is a high-performance, dual-phase synchronous step-down DC/DC controller designed for automotive and industrial power systems. It supports 4V–60V input, delivers two independent outputs (e.g., 8.5V/3.3V), operates with 50µA quiescent current in single-channel sleep mode, features out-of-phase operation to reduce input ripple, and is AEC-Q100 qualified for –55°C to 150°C junction temperature.
For engineers reviewing the LTC3890MPUH-2#TRPBF datasheet, LTC3890MPUH-2#TRPBF pinout, LTC3890MPUH-2#TRPBF application, or LTC3890MPUH-2#TRPBF equivalent, key selection criteria include its dual-channel phase-lockable architecture (75–850kHz), selectable light-load modes (Burst/Pulse-Skipping/Continuous), RSENSE/DCR current sensing, and robust automotive-grade thermal and reliability specs.
Technical Context
The LTC3890MPUH-2#TRPBF implements a constant-frequency current-mode control architecture with two independent controllers operating 180° out-of-phase to minimize input capacitor RMS current and EMI. Each channel features dedicated ITH error amplifier outputs, TRACK/SS pins for soft-start or voltage tracking, and programmable current limit via ILIM pin selection (GND/FLOAT/INTVCC).
Its dual-phase topology enables high-current distributed power delivery while maintaining low-noise operation; the internal 5.1V INTVCC LDO can be powered from VIN or an external EXTVCC supply ≥4.7V, improving system efficiency. The device supports precise output regulation (±1% VFB accuracy over temperature) and includes independent PGOOD1/PGOOD2 open-drain monitors with ±10% trip thresholds and 25µs fault reporting delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4V to 60V - supports wide battery chemistries (12V/24V/48V systems) and intermediate bus voltages without external pre-regulation. |
| Quiescent Current | 50µA (one channel active) - extends runtime in always-on automotive modules like telematics or ADAS sensors. |
| Output Voltage Range | 0.8V to 24V per channel - enables flexible generation of logic rails (3.3V), analog supplies (5V/8.5V), and higher-voltage subsystems. |
| Switching Frequency | 75kHz to 850kHz (phase-lockable) - allows EMI optimization and compact magnetics design across diverse load conditions. |
| Duty Cycle Max | 99% - supports ultra-low dropout operation critical for cold-crank scenarios where VIN drops near VOUT. |
| Operating Temp | –55°C to 150°C (junction) - validated for under-hood automotive applications per AEC-Q100 Grade MP. |
| Package | 32-pin 5mm × 5mm QFN with exposed pad - provides low thermal resistance (θJA = 34°C/W) and space-efficient layout. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = SGND). Requires soldering of exposed pad to PCB ground plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1– / SENSE2– (1, 9) | Differential current sense (–) input | Accepts common-mode voltage up to 28V; supplies bias current when > INTVCC – 0.5V for accurate DCR/RSENSE sensing. |
| FREQ (2) | Oscillator frequency programming | Resistor-to-GND sets 50–900kHz; internal 20µA pull-up enables fixed 350kHz (GND) or 535kHz (INTVCC) operation. |
| PHASMD (3) | Phase relationship selector | Configures TG2/CLKOUT phase offset vs TG1: 180°/60° (GND), 240°/120° (INTVCC), or 180°/90° (floating). |
| PLLIN/MODE (5) | Sync input & light-load mode control | Accepts external clock for synchronization; selects Burst Mode (GND/floating), Continuous (INTVCC), or Pulse-Skipping (1.2–INTVCC–1.3V). |
| RUN1 / RUN2 (7, 8) | Independent channel enable | Shuts down individual controller below 1.15V/1.20V; full shutdown (<0.7V both) reduces IQ to <14µA. |
| INTVCC (19) | Internal LDO output | 5.1V ±3% regulated supply for gate drivers and control circuitry; requires ≥4.7µF ceramic decoupling to SGND. |
| EXTVCC (20) | External LDO input | Bypasses VIN-powered LDO when >4.7V; switchover hysteresis is 250mV - enables efficient use of secondary converter outputs. |
| PGOOD1 / PGOOD2 (14, 27) | Open-drain power-good indicators | Assert low when VFB deviates >±10% from setpoint; 25µs response time ensures fast fault detection in safety-critical systems. |
| ILIM (28) | Current limit threshold select | Three levels: 22/43/64mV (GND/FLOAT/INTVCC) - enables scalable overcurrent protection across different MOSFET RDS(on) and sense resistor values. |
| TRACK/SS1 / TRACK/SS2 (13, 29) | Soft-start & voltage tracking input | Internal 1µA pull-up enables RC ramp; accepts external reference for coordinated startup with other rails (e.g., FPGA core/I/O sequencing). |
Key Features
| Feature | Design Value |
|---|---|
| Out-of-phase dual controllers | Reduces input capacitor RMS current by ~30% and suppresses power supply-induced noise in shared input buses. |
| OPTI-LOOP® compensation | Enables stable loop response across wide ranges of output capacitance (10µF–1000µF) and ESR without manual tuning. |
| Selectably optimized light-load efficiency | Burst Mode achieves >85% efficiency at 1mA load; Pulse-Skipping maintains low output ripple; Continuous avoids subharmonics. |
| Robust automotive qualification | AEC-Q100 Grade MP (–55°C to 150°C) with tested reliability data - suitable for engine control units and infotainment head units. |
| Flexible current sensing | Supports both precision shunt resistors and lossless DCR sensing networks - eliminates need for separate current-sense amplifiers. |
| Independent dual-channel control | Each channel has dedicated RUN, TRACK/SS, PGOOD, and ITH pins - enables asymmetric configurations (e.g., 8.5V@3A + 3.3V@5A). |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powering multi-rail processors, DDR memory, and display interfaces in vehicle head units under cold-crank (4.5V) and load-dump (60V) conditions. IC Role / Device Role / Timing Role: Dual-output synchronous buck controller providing isolated 8.5V (analog/audio) and 3.3V (logic/memory) rails with independent sequencing and fault monitoring. Use Value: 50µA quiescent current prevents battery drain during vehicle sleep; 99% duty cycle sustains output during cranking; AEC-Q100 MP grade ensures long-term reliability. |
Use Scenario: Generating stable 5V and 12V supplies for digital I/O, analog sensor conditioning, and communication interfaces in factory automation controllers. IC Role / Device Role / Timing Role: High-efficiency dual-phase controller delivering 5V@6A and 12V@2A from 24V industrial bus, with out-of-phase switching to minimize input filter size. Use Value: Programmable 75–850kHz frequency allows EMI compliance across multiple board layouts; RSENSE/DCR flexibility simplifies BOM across product variants. |
| Battery-Powered Telematics | Medical Diagnostic Equipment |
|
Use Scenario: Power management for LTE/CAN-connected vehicle trackers operating on 12V lead-acid or LiFePO₄ batteries with multi-year standby requirements. IC Role / Device Role / Timing Role: Low-IQ dual controller enabling always-on GPS/GNSS and cellular modem subsystems with independent enable/disable control per rail. Use Value: Sleep-mode IQ of 50µA extends battery life beyond 5 years in deep-sleep states; independent RUN pins allow selective wake-up of subsystems. |
Use Scenario: Precision power delivery for imaging sensors, ADC front-ends, and FPGA-based signal processing in portable ultrasound or patient monitors. IC Role / Device Role / Timing Role: Dual-output controller generating low-noise 3.3V (digital core) and 5.0V (analog bias) with tight VFB accuracy (±1%) and low output ripple. Use Value: OPTI-LOOP® compensation ensures stability with diverse capacitive loads; independent TRACK/SS pins enable controlled power-up sequencing to prevent latch-up. |
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 |
|---|---|---|---|
| LTC3890HUH-2#TRPBF | Same silicon, rated for –40°C to 150°C (not –55°C); lower cold-temp guarantee. | Suitable for non-critical under-hood locations where extended low-temp operation is not required. | Select LTC3890MPUH-2#TRPBF when full –55°C startup and operation must be guaranteed (e.g., military or extreme-climate automotive). |
| MP2918GL-Z | Single-chip dual-phase controller with integrated MOSFET drivers only; no external top/bottom FET support; max VIN = 28V. | Targeted at cost-sensitive, lower-power consumer electronics (≤12V input, ≤20A total). | Choose LTC3890MPUH-2#TRPBF for high-input-voltage resilience (60V), discrete FET flexibility, and AEC-Q100 MP qualification. |
Compared with LTC3890HUH-2#TRPBF, the LTC3890MPUH-2#TRPBF adds guaranteed –55°C operation and tighter cold-temperature RUN pin thresholds; versus MP2918GL-Z, it offers 2.1× higher VIN rating, external FET control for thermal/power scalability, and automotive-grade reliability documentation.
Availability
LTC3890MPUH-2#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC power supplies, and battery-powered telematics requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for LTC3890MPUH-2#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 industrial, automotive, communications, and healthcare markets.
The LTC3890MPUH-2#TRPBF belongs to the LTC3890 family of dual-phase synchronous buck controllers engineered for high-reliability automotive and industrial power conversion - emphasizing low IQ, wide VIN range, and AEC-Q100 compliance.
FAQ
What is the minimum input voltage supported by the LTC3890MPUH-2#TRPBF?
The LTC3890MPUH-2#TRPBF supports a minimum input voltage of 4V, enabling reliable operation during automotive cold-crank events where battery voltage dips to ~4.5V. Its 99% maximum duty cycle ensures regulation even when VIN approaches VOUT, making it suitable for low-dropout applications where input voltage margin is constrained.
How does the ILIM pin affect current limiting on the LTC3890MPUH-2#TRPBF?
The ILIM pin on the LTC3890MPUH-2#TRPBF selects one of three maximum current sense thresholds: 22mV (ILIM = GND), 43mV (ILIM = FLOAT), or 64mV (ILIM = INTVCC). This directly sets the peak inductor current trip point for both channels, allowing designers to match overcurrent protection to specific MOSFET RDS(on) or sense resistor values without changing feedback networks.
Can the LTC3890MPUH-2#TRPBF synchronize to an external clock source?
Yes, the LTC3890MPUH-2#TRPBF can synchronize to an external clock via the PLLIN/MODE pin. When an external signal is applied, the internal phase-locked loop aligns the rising edge of TG1 with the external clock's rising edge. This capability enables deterministic EMI reduction and coordinated switching across multiple power stages in complex systems.
What is the purpose of the PHASMD pin on the LTC3890MPUH-2#TRPBF?
The PHASMD pin on the LTC3890MPUH-2#TRPBF configures the phase relationship between the two controller channels and the CLKOUT signal. Pulling it to GND, INTVCC, or leaving it floating sets TG2 and CLKOUT to be 180°/60°, 240°/120°, or 180°/90° out-of-phase with TG1 - enabling optimal interleaving for reduced input/output ripple and thermal distribution.
Does the LTC3890MPUH-2#TRPBF support both RSENSE and DCR current sensing?
Yes, the LTC3890MPUH-2#TRPBF supports both RSENSE and DCR current sensing methods. Its differential SENSE+ and SENSE– inputs accept either a precision shunt resistor or a DCR network across the inductor, with common-mode voltage range up to 28V. This flexibility eliminates the need for external current-sense amplifiers and simplifies design across varying power levels and efficiency targets.
LTC3890MPUH-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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, Phase Control, Power Good, Soft Start, Tracking
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3890MPUH-2#TRPBF FAQ
1.How can I place an order for LTC3890MPUH-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3890MPUH-2#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 LTC3890MPUH-2#TRPBF reliable?
The price and inventory of LTC3890MPUH-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3890MPUH-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3890MPUH-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3890MPUH-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3890MPUH-2#TRPBF?
LTC3890MPUH-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3890MPUH-2#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 LTC3890MPUH-2#TRPBF?
For technical support, including LTC3890MPUH-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3890MPUH-2#TRPBF requirements.
6.How does Aetrix verify that LTC3890MPUH-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3890MPUH-2#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 LTC3890MPUH-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3890MPUH-2#TRPBF?
All LTC3890MPUH-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3890MPUH-2#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 LTC3890MPUH-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3890MPUH-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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