My Inquiry
My Account
Analog Devices Inc. LTC7890RUJM#TRPBF
- Part No.:
- LTC7890RUJM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- -
- Datasheet:
-
LTC7890RUJM#TRPBF.pdf
- Description:
- IC REG LIN 100V DUAL SYNC BUCK
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7890RUJM#TRPBF from Analog Devices is a dual, 2-phase synchronous step-down controller optimized for gallium nitride (GaN) FETs, operating across 4 V to 100 V input and delivering regulated outputs from 0.8 V to 60 V. It features smart bootstrap switches, resistor-adjustable dead times, split gate drivers with independent turn-on/turn-off strength control, and ultra-low 5 μA quiescent current in single-channel operation - enabling high-efficiency, high-frequency power conversion in industrial and telecom systems.
For engineers reviewing the LTC7890RUJM#TRPBF datasheet, LTC7890RUJM#TRPBF pinout, LTC7890RUJM#TRPBF application, or LTC7890RUJM#TRPBF equivalent, key selection considerations include GaN-specific gate drive voltage adjustability (4 V–5.5 V), dual-channel phase interleaving, programmable frequency (100 kHz–3 MHz), spread spectrum modulation, and internal optimization for zero-voltage switching timing without external diodes.
Technical Context
The LTC7890RUJM#TRPBF implements a constant-frequency, peak-current-mode dual controller with 180° phase interleaving to reduce input ripple and EMI. Each channel integrates independent error amplifiers (ITH1/ITH2), differential current sense comparators (SENSE1±/SENSE2±), and fully isolated gate drivers (TGUP/TGDN/BGUP/BGDN) supporting both top- and bottom-side GaN FETs.
Its architecture eliminates need for catch, clamp, or bootstrap diodes via internal smart bootstrap switches that prevent BOOSTx overcharging during dead time. Dead time is internally optimized for near-zero values or externally tuned via DTCA/DTCB pins (7 ns–60 ns), while DRVSET and DRVUV pins configure INTVCC regulation (4.5 V–5.7 V) and driver UVLO thresholds (3.6 V–5.2 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4 V to 100 V - supports wide-input industrial and telecom power rails without pre-regulation. |
| VOUT Range | 0.8 V to 60 V - enables flexible output configuration including high-voltage intermediate bus generation. |
| Quiescent Current | 5 μA (48 VIN → 5 VOUT, Ch1 active) - extends battery life in always-on or standby systems. |
| Switching Frequency | 100 kHz to 3 MHz - allows compact magnetics and high-density layout; synchronizable externally. |
| Gate Drive Voltage | Adjustable 4 V to 5.5 V - matches threshold and Miller plateau requirements of diverse GaN FETs and logic-level MOSFETs. |
| Dead Time Control | Smart near-zero (≤2 ns) or resistor-programmable (7–60 ns) - minimizes shoot-through risk while maximizing efficiency at high frequencies. |
| Package | 40-lead (6 mm × 6 mm), side-wettable QFN - supports automated optical inspection (AOI) and robust thermal performance (θJA = 34°C/W). |
Pinout & Package
40-lead, 6 mm × 6 mm, side-wettable QFN package with exposed thermal pad (EPAD) requiring solder connection to PCB ground for rated electrical and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FREQ | Internal VCO frequency control | Resistor-programmable (100 kHz–3 MHz) or fixed-frequency (370 kHz/2.25 MHz); low-capacitance node critical for jitter stability. |
| DTCA / DTCB | Dead time control inputs | Set adaptive or near-zero delay between bottom-FET-off→top-FET-on (DTCA) and top-FET-off→bottom-FET-on (DTCB); resistor-tunable for margining. |
| TGUP1/TGUP2 | Top-FET gate pull-up drivers | High-current (2 Ω pull-up) outputs tied to BOOSTx; enable fast GaN gate rise with direct connection or slew-rate control via series resistor. |
| BGUP1/BGUP2 | Bottom-FET gate pull-up drivers | Pull-up to DRVCC (1 Ω); provide Kelvin sensing of bottom-FET gate during turn-off for accurate timing control. |
| SENSE1−/SENSE2− | Negative current sense inputs | Differential inputs with bias current dependent on voltage level (>3.2 V reduces VIN-referred IQ); support low-value RSENSE or DCR sensing. |
Key Features
| Feature | Design Value |
|---|---|
| GaN-optimized gate drive | Split TG/BG drivers with independently adjustable turn-on/turn-off strength and 4–5.5 V programmable drive voltage - ensures reliable switching of enhancement-mode GaN HEMTs. |
| No external protection diodes | Integrated smart bootstrap switches prevent BOOSTx overvoltage during dead time - eliminates discrete clamp/catch diodes and associated board area and losses. |
| Ultra-low light-load IQ | 5 μA total supply current with one channel active - enables >90% efficiency at <100 mA load in industrial IoT and remote monitoring applications. |
| Programmable dead time | Internally optimized near-zero dead time (≤2 ns) or resistor-adjustable 7–60 ns - balances shoot-through prevention and conduction loss across GaN FETs and operating conditions. |
| Spread spectrum modulation | 20% frequency dithering enabled by PLLIN/SPREAD = INTVCC - reduces peak EMI amplitude without altering average switching frequency or loop stability. |
Applications
| Industrial Power Systems | Military Avionics |
|---|---|
Use Scenario: 48 V input distributed power architecture supplying multiple isolated DC-DC converters in factory automation PLCs. IC Role / Device Role / Timing Role: Dual-phase buck controller managing two parallel 12 V/20 A outputs with interleaved timing to halve input ripple current and simplify bulk capacitance. Use Value: Eliminates external bootstrap diodes and reduces component count vs. silicon-based controllers, while maintaining >95% efficiency at full load across –40°C to +125°C ambient. |
Use Scenario: High-reliability 28 V aircraft bus powering mission-critical flight control electronics with strict EMI limits. IC Role / Device Role / Timing Role: Synchronized dual-channel controller operating at 1.2 MHz with spread spectrum to meet DO-160 Section 21 Class A conducted emissions requirements. Use Value: Smart dead time control prevents shoot-through under rapid temperature transients, and 150°C junction rating supports uncooled avionics mounting. |
| Telecom Power Systems | Medical Imaging Power Supplies |
Use Scenario: 54 V telecom rectifier output converted to 12 V/30 A for baseband processing units in 5G macrocells. IC Role / Device Role / Timing Role: Dual-phase GaN controller driving 100 V-rated GaN FETs with 2.25 MHz fixed frequency to minimize magnetic size and improve transient response. Use Value: 5 μA quiescent current enables efficient standby mode during cell sleep cycles; PGOOD1/PGOOD2 provide independent rail health monitoring. |
Use Scenario: Compact CT scanner subsystem requiring tightly regulated ±15 V and +5 V rails from a 48 V backplane with minimal heat dissipation. IC Role / Device Role / Timing Role: Two independent channels configured as separate buck regulators (Ch1: +15 V, Ch2: +5 V), each with dedicated TRACK/SSx for coordinated startup sequencing. Use Value: Adjustable gate drive voltage (4.5 V) ensures clean switching of low-threshold GaN FETs, reducing switching losses and audible noise in sensitive diagnostic environments. |
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 |
|---|---|---|---|
| LTC7891IUJ#TRPBF | Single-output, 2-phase interleaved controller with integrated MOSFET drivers; no GaN-specific optimizations or adjustable gate voltage. | Designed for silicon MOSFETs only; lacks smart bootstrap, dead time tuning, and GaN drive voltage adjustment. | Select when using standard Si MOSFETs and requiring integrated drivers instead of external GaN drivers. |
| MP2918GL-Z | Dual-output, 2-phase controller with 4.5–60 V input, but fixed 5 V gate drive and no spread spectrum or programmable dead time. | Targeted at cost-sensitive industrial SMPS; lacks GaN-specific protections and ultra-low IQ operation. | Consider for non-GaN designs where BOM cost outweighs efficiency and EMI performance requirements. |
Compared with LTC7891IUJ#TRPBF and MP2918GL-Z, the LTC7890RUJM#TRPBF uniquely delivers GaN-optimized gate drive, sub-5 μA quiescent current, and resistor-tunable dead time - making it the only option among the three qualified for high-frequency, high-efficiency GaN-based telecom and avionics power supplies.
Availability
LTC7890RUJM#TRPBF is available at Aetrix Electronics and suitable for industrial power systems, military avionics, and telecommunications power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability designs.
Supply support for LTC7890RUJM#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, communications, and aerospace markets.
The LTC7890RUJM#TRPBF belongs to Analog Devices' Power by Linear™ controller family, engineered specifically to address GaN FET integration challenges - including gate drive optimization, dead time control, and bootstrap reliability - for next-generation high-efficiency, high-density DC-DC conversion.
FAQ
What is the minimum input voltage supported by the LTC7890RUJM#TRPBF?
The LTC7890RUJM#TRPBF supports a minimum input voltage of 4 V, verified across its full operating junction temperature range (–40°C to +150°C). This enables use in 5 V and 12 V intermediate bus architectures, as well as battery-backed systems where input may sag under load. The controller maintains regulation and gate drive integrity down to this limit without requiring external brown-out circuitry.
Does the LTC7890RUJM#TRPBF require external bootstrap diodes?
No, the LTC7890RUJM#TRPBF does not require external bootstrap diodes. Its internal smart bootstrap switches actively manage BOOST1 and BOOST2 charging during dead time, preventing overvoltage and eliminating shoot-through risk. This is confirmed in the General Description and Pin Configuration sections of the datasheet, and removes two components per channel versus conventional controllers.
How is the output voltage set on the LTC7890RUJM#TRPBF?
The LTC7890RUJM#TRPBF sets output voltage via resistive feedback dividers on VFB1 and VFB2. With VPRG1 floating, VFB1 regulates to 0.8 V, allowing 0.8 V–60 V output via external resistors. Tying VPRG1 to GND or INTVCC configures fixed 5 V or 12 V outputs using internal dividers. VFB2 operates similarly but defaults to tracking VFB1 in 2-phase single-output mode.
Can the LTC7890RUJM#TRPBF drive both GaN and silicon MOSFETs?
Yes, the LTC7890RUJM#TRPBF can drive both GaN and logic-level silicon MOSFETs. Its gate drive voltage is precisely adjustable from 4 V to 5.5 V via the DRVSET pin, matching the threshold and Miller plateau characteristics of eGaN® FETs (e.g., EPC2065) and low-VGS(th) Si MOSFETs (e.g., CSD18540Q5B). This flexibility is explicitly stated in the Features and General Description sections.
What thermal performance can be expected from the LTC7890RUJM#TRPBF in a standard 4-layer PCB layout?
In a standard 4-layer PCB with 2 oz copper, 1-in² exposed thermal pad connected to internal ground planes, the LTC7890RUJM#TRPBF achieves a junction-to-ambient thermal resistance (θJA) of 34°C/W, as specified in the Absolute Maximum Ratings table. At 2 W dissipation, this yields ~68°C junction rise above ambient - well within its –40°C to +150°C operating range and validated in thermal characterization data (Figure 22–24).
LTC7890RUJM#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- -
- Number of Outputs:
- -
- Frequency - Switching:
- -
- Voltage/Current - Output 1:
- -
- Voltage/Current - Output 2:
- -
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- -
- w/Supervisor:
- -
- w/Sequencer:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
LTC7890RUJM#TRPBF FAQ
1.How can I place an order for LTC7890RUJM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7890RUJM#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 LTC7890RUJM#TRPBF reliable?
The price and inventory of LTC7890RUJM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7890RUJM#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7890RUJM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7890RUJM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7890RUJM#TRPBF?
LTC7890RUJM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7890RUJM#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 LTC7890RUJM#TRPBF?
For technical support, including LTC7890RUJM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7890RUJM#TRPBF requirements.
6.How does Aetrix verify that LTC7890RUJM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7890RUJM#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 LTC7890RUJM#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7890RUJM#TRPBF?
All LTC7890RUJM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7890RUJM#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 LTC7890RUJM#TRPBF part is unused and in its original packaging.
Return procedure for LTC7890RUJM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7890RUJM#TRPBF Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
