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Analog Devices Inc. LTC3826EG-1#TRPBF
- Part No.:
- LTC3826EG-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC3826EG-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,860
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Product details
Overview
LTC3826EG-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-phase, synchronous step-down controller driving two independent N-channel MOSFET stages for high-efficiency DC/DC conversion. It delivers ±1% output voltage accuracy across 0.8V–10V range, operates from 4V–36V input, and achieves 30μA quiescent current with one channel active-enabling long battery life in automotive infotainment and portable industrial systems.
For engineers reviewing the LTC3826EG-1#TRPBF datasheet, LTC3826EG-1#TRPBF pinout, LTC3826EG-1#TRPBF application, or LTC3826EG-1#TRPBF equivalent, key selection criteria include dual-phase out-of-phase operation to reduce input ripple, OPTI-LOOP® compensation for wide capacitor ESR tolerance, selectable light-load modes (Burst Mode®, pulse skipping, continuous), and integrated power-good monitoring with overvoltage protection.
Technical Context
The LTC3826EG-1#TRPBF implements a constant-frequency current-mode architecture with two 180° out-of-phase controllers, enabling reduced input capacitance and lower EMI. Its phase-lockable oscillator supports 140kHz–650kHz synchronization via PLLIN/MODE and PLLLPF pins, with internal frequency options of 250kHz/390kHz/530kHz when unsynchronized.
Each channel features independent TRACK/SS pins for soft-start or supply tracking, ITH error amplifier outputs for loop compensation, and differential SENSE+/- inputs with 100mV current-sense threshold. The device integrates dual gate drivers (TG/BG) with 99% max duty cycle support and internal LDOs powering INTVCC from VIN or EXTVCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports 12V/24V automotive batteries and wide industrial DC rails without external regulators. |
| Output Voltage Range | 0.8V to 10V - programmable via external resistor divider; precise 0.8V reference enables low-voltage core rail generation. |
| Quiescent Current | 30μA (one channel active) - extends runtime in always-on battery-powered systems like telematics modules. |
| Switching Frequency | 140kHz–650kHz (PLL-locked) - balances efficiency vs. size; 390kHz typical free-running frequency minimizes inductor volume. |
| Output Accuracy | ±1% over temperature - ensures stable regulation for sensitive analog or FPGA I/O supplies. |
| Light-Load Modes | Burst Mode®, pulse skipping, or forced continuous - selectable per system noise/efficiency trade-off requirements. |
| Package | 28-Lead SSOP (G package) - surface-mount compatible with standard reflow, suitable for space-constrained PCB layouts. |
Pinout & Package
28-Lead Plastic SSOP (G package), JEDEC MS-012AC compliant, 0.635mm pitch, body size 10.2mm × 5.3mm.
| 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 OPTI-LOOP® stability tuning. |
| VFB1, VFB2 (2, 12) | Feedback input | Monitors regulated output via resistive divider; referenced to 0.8V internal precision bandgap. |
| SENSE1+, SENSE2+ (3, 11) | Current sense positive input | Differential input to current comparator; sets foldback limit at 100mV threshold. |
| SENSE1−, SENSE2− (4, 10) | Current sense negative input | Completes differential sensing path; rejects common-mode noise on high-side shunt. |
| PLLLPF (5) | PLL loop filter connection | Accepts RC network for external clock synchronization; selects fixed frequency when tied to GND/INTVCC/floating. |
| PLLIN/MODE (6) | Sync input / light-load mode select | Drives PLL phase detector when clocked externally; selects Burst Mode® (<0.7V), pulse skip (0.9V–INTVCC−1.2V), or continuous (>INTVCC). |
| SGND (7) | Small-signal ground | Reference for analog circuitry; must be isolated from PGND to avoid noise coupling into feedback paths. |
| RUN1, RUN2 (8, 9) | Channel enable control | Logic-level shutdown: <0.7V disables respective channel; both low reduces IQ to 4μA. |
| PGOOD1 (27) | Power-good indicator | Open-drain output asserts low when VFB1 deviates >±10% from setpoint - enables sequencing or fault reporting. |
| TG1, TG2 (26, 15) | Top N-MOSFET gate drive | Floating driver output; swing = INTVCC − 0.5V superimposed on SW node - supports high-side synchronous rectification. |
| BG1, BG2 (23, 18) | Bottom N-MOSFET gate drive | Ground-referenced driver; 0V to INTVCC swing - directly drives synchronous FETs without level shifters. |
| TRACK/SS1, TRACK/SS2 (28, 14) | Soft-start / tracking input | Internal 1μA pull-up charges external cap for linear ramp; also accepts resistor divider for supply tracking during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Out-of-phase dual controllers | Reduces RMS input ripple current by ~70% versus single-phase, cutting required CIN volume and cost. |
| OPTI-LOOP® compensation | Enables stable loop response across 10× variation in output capacitor ESR - eliminates need for custom compensation per design. |
| 99% maximum duty cycle | Supports ultra-low dropout operation (e.g., 5V→4.95V), critical for post-regulation in high-efficiency power trees. |
| Independent channel control | RUN/SS/TRACK pins per channel allow staggered startup, independent sequencing, and dynamic load shedding. |
| Integrated INTVCC LDO | 5.25V regulator (VIN-powered) or 7.5V regulator (EXTVCC-powered) eliminates need for external bias supply. |
| Output overvoltage protection | Hardware comparator trips at ±12% VFB deviation - protects downstream ICs without software intervention. |
Applications
| Automotive Infotainment | Industrial Portable Instrumentation |
|---|---|
|
Use Scenario: Powering DSP, display controller, and audio codec in vehicle head units with 12V battery input. IC Role / Device Role / Timing Role: Dual-phase controller generating 3.3V/8.5V rails with out-of-phase switching to minimize conducted EMI near AM/FM receivers. Use Value: 30μA IQ extends backup battery life; ±1% accuracy maintains ADC reference stability under load transients. |
Use Scenario: Compact handheld test equipment requiring isolated 5V and 3.3V rails from Li-ion battery pack. IC Role / Device Role / Timing Role: Synchronous buck controller delivering regulated outputs while maintaining low thermal footprint in sealed enclosure. Use Value: Burst Mode® operation sustains >85% efficiency at 100μA load; TRACK/SS pins enable coordinated startup with MCU reset logic. |
| Distributed Telecom Power | Medical Point-of-Care Devices |
|
Use Scenario: Intermediate bus converter in remote radio unit supplying 5V/3.3V to FPGA and transceivers. IC Role / Device Role / Timing Role: Dual-output controller synchronized to system clock via PLLIN/MODE to suppress beat frequencies in RF sections. Use Value: 140kHz–650kHz PLL lock range avoids interference with 4G/5G carrier bands; PGOOD1 enables hot-swap sequencing. |
Use Scenario: Battery-powered ultrasound probe requiring low-noise, low-ripple 1.8V and 2.5V analog supply rails. IC Role / Device Role / Timing Role: Dual-phase controller operating in forced continuous mode to eliminate audible switching noise in sensitive analog front-end. Use Value: Continuous conduction mode yields <10mVpp output ripple at full load; ±1% accuracy ensures consistent ADC gain calibration. |
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 |
|---|---|---|---|
| MP2918GL-Z | Single-chip dual-phase controller with integrated MOSFETs; 4.5V–16V input; no PLL sync; 12A total output. | Lower BOM count but limited to mid-range input voltages; lacks EXTVCC option and independent TRACK/SS pins. | Prefer MP2918GL-Z for compact, cost-sensitive designs where 36V input and precise sequencing are not required. |
| LTC3855IUH#PBF | Single-phase, 4V–36V controller with similar IQ (35μA), OPTI-LOOP®, and 0.8V reference; 28-pin QFN package. | No dual-phase capability; cannot reduce input ripple or share load between phases; lacks PGOOD1 and foldback limiting. | Choose LTC3855IUH#PBF only when single-rail generation suffices and board area permits larger passive components. |
Compared with MP2918GL-Z and LTC3855IUH#PBF, the LTC3826EG-1#TRPBF uniquely combines 36V input tolerance, true dual-phase out-of-phase operation, PLL synchronization, and independent channel control - making it optimal for high-reliability, multi-rail automotive and industrial systems demanding low EMI and flexible sequencing.
Availability
LTC3826EG-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial portable instrumentation, distributed telecom power, and medical point-of-care devices requiring stable component supply and long-term lifecycle assurance.
Supply support for LTC3826EG-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 for precision, industrial, automotive, and communications applications.
The LTC3826-1 product line was designed specifically for high-efficiency, dual-output DC/DC conversion in space- and noise-constrained environments-emphasizing low IQ, out-of-phase operation, and robust protection features for mission-critical power systems.
FAQ
What is the absolute maximum input voltage rating for the LTC3826EG-1#TRPBF?
The LTC3826EG-1#TRPBF has an absolute maximum input voltage (VIN) rating of 36V. Exceeding this value-even momentarily-may cause permanent damage. The device operates continuously over 4V–36V, supporting 12V and 24V automotive battery systems with cold-crank and load-dump margin.
Does the LTC3826EG-1#TRPBF support synchronization to an external clock source?
Yes, the LTC3826EG-1#TRPBF supports external clock synchronization via the PLLIN/MODE pin. When driven by an external signal, its phase-locked loop locks to frequencies from 140kHz to 650kHz (guaranteed), with typical capture up to 800kHz. An R-C filter must be connected to PLLLPF for loop stability.
How does the LTC3826EG-1#TRPBF achieve 30μA quiescent current?
The LTC3826EG-1#TRPBF achieves 30μA quiescent current by disabling non-essential circuitry in sleep mode when only one channel is active and light-load conditions trigger Burst Mode® operation. Internal logic parks the ITH pin at 0.425V and shuts down gate drivers and oscillator sections not in use.
Can the LTC3826EG-1#TRPBF generate two different output voltages simultaneously?
Yes, the LTC3826EG-1#TRPBF independently regulates two output voltages using separate VFB1/VFB2 feedback networks and TRACK/SS1/TRACK/SS2 pins. Typical configurations include 3.3V/8.5V, 1.8V/5V, or any combination within 0.8V–10V, with ±1% accuracy maintained per rail.
What protection features are integrated into the LTC3826EG-1#TRPBF?
The LTC3826EG-1#TRPBF integrates output overvoltage protection (±12% trip), current foldback limiting, undervoltage lockout (3.7V nominal), power-good monitoring (PGOOD1), and thermal shutdown. These operate autonomously without microcontroller intervention, enhancing system reliability in harsh environments.
LTC3826EG-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm 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 ~ 36V
- Frequency - Switching:
- 250kHz ~ 530kHz
- Duty Cycle (Max):
- 99.4%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
LTC3826EG-1#TRPBF FAQ
1.How can I place an order for LTC3826EG-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3826EG-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 LTC3826EG-1#TRPBF reliable?
The price and inventory of LTC3826EG-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 LTC3826EG-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3826EG-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3826EG-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3826EG-1#TRPBF?
LTC3826EG-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3826EG-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 LTC3826EG-1#TRPBF?
For technical support, including LTC3826EG-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3826EG-1#TRPBF requirements.
6.How does Aetrix verify that LTC3826EG-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3826EG-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 LTC3826EG-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3826EG-1#TRPBF?
All LTC3826EG-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3826EG-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 LTC3826EG-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3826EG-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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