My Inquiry
My Account
Analog Devices Inc. LTC3826IUH#TRPBF
- Part No.:
- LTC3826IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3826IUH#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,355
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3826IUH#TRPBF from Analog Devices (formerly Linear Technology) is a dual-phase, synchronous step-down DC/DC controller IC driving two independent N-channel MOSFET stages. It delivers 30μA no-load quiescent current, ±1% output voltage accuracy, and supports 4V–36V input with 0.8V–10V adjustable outputs - ideal for automotive power rails and battery-powered digital systems requiring high efficiency at light loads.
For engineers reviewing the LTC3826IUH#TRPBF datasheet, LTC3826IUH#TRPBF pinout, LTC3826IUH#TRPBF application, or LTC3826IUH#TRPBF equivalent, key selection criteria include out-of-phase dual-channel operation to reduce input capacitance, OPTI-LOOP® compensation for wide output capacitor/ESR tolerance, selectable Burst Mode®/pulse-skipping/continuous conduction, and integrated power-good monitoring with tracking soft-start.
Technical Context
The LTC3826IUH#TRPBF implements a constant-frequency current-mode architecture with two 180° out-of-phase controllers, enabling phase-lockable operation from 140kHz to 650kHz. Its dual ITH error amplifier outputs independently regulate peak inductor current per channel via differential SENSE+/- inputs and support foldback current limiting during short-circuit events.
It integrates an internal 5.25V/7.5V dual-LDO system powering gate drivers from either VIN or EXTVCC, with automatic switchover at 4.7V. The PLLIN/MODE pin serves dual functions: external clock synchronization input and light-load mode selector (Burst Mode®, pulse skipping, or forced continuous), while PHASMD and CLKOUT enable multi-phase daisy-chaining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports 12V/24V automotive batteries and wide-range industrial supplies. |
| Quiescent Current (One Channel On) | 30μA - extends runtime in always-on battery systems like telematics or infotainment. |
| Output Voltage Accuracy | ±1% over temperature - ensures stable core/logic rail regulation without post-regulation trimming. |
| Switching Frequency Range | 140kHz to 650kHz (phase-lockable) - balances efficiency vs. size tradeoffs across 2–10A load ranges. |
| Reference Voltage | 0.800V ±0.8% - enables precise low-voltage output setting (e.g., 0.8V FPGA core, 3.3V I/O) with minimal divider error. |
| Power Good Threshold | ±10% of VFB setpoint - provides reliable rail sequencing and fault detection for downstream processors. |
| Shutdown Current | 4μA - enables full-system deep sleep in portable devices with zero-load standby. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = SGND), rated for –40°C to +85°C operation. Requires soldering of exposed pad to PCB ground plane for thermal performance (θJA = 34°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1– / SENSE2– (Pins 1, 9) | Differential current sense (–) input | Connects to low-side of sense resistor; enables accurate current limiting and cycle-by-cycle protection. |
| TG1 / TG2 (Pins 26, 15) | Top N-MOSFET gate driver output | Floating driver with INTVCC-referenced swing; requires external bootstrap capacitor and Schottky diode. |
| BG1 / BG2 (Pins 23, 18) | Bottom N-MOSFET gate driver output | Ground-referenced driver sourcing/sinking up to 3A peak; drives synchronous rectifier directly. |
| VFB1 / VFB2 (Pins 31, 11) | Feedback input for output voltage regulation | Compares divided output voltage against 0.8V reference; sets final regulated rail value. |
| TRACK/SS1 / TRACK/SS2 (Pins 29, 13) | Soft-start and voltage tracking control | Internal 1μA pull-up enables linear ramp-up; supports external resistor divider for supply tracking. |
| PLLIN/MODE (Pin 5) | Mode selection & external clock sync input | Selects Burst Mode® (≤0.7V), pulse skipping (0.9V–INTVCC−1.2V), or forced continuous (INTVCC). |
| PGOOD1 / PGOOD2 (Pins 27, 28) | Open-drain power-good status output | Asserts low when respective VFB deviates >±10% - used for system enable/disable sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Out-of-phase dual controllers | Reduces RMS input ripple current by ~70%, cutting required input capacitance and EMI filter size. |
| OPTI-LOOP® compensation | Enables stable loop response across 10μF–1000μF output capacitors with 5mΩ–100mΩ ESR - no re-tuning needed. |
| Independent RUN1/RUN2 control | Per-channel enable/disable allows dynamic power partitioning - e.g., keep I/O rail active while shutting down core rail. |
| 99% maximum duty cycle | Supports ultra-low dropout operation (e.g., 5V→4.95V) critical for post-regulation in high-efficiency systems. |
| Integrated EXTVCC switchover | Automatically powers INTVCC from high-efficiency secondary rail (≥4.7V), reducing losses vs. VIN-derived LDO. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Dual-rail power supply for SoC (1.2V core) and interface peripherals (3.3V/5V) in head-unit ECUs. IC Role / Device Role / Timing Role: Dual-phase controller generating tightly regulated, sequenced outputs with PGOOD signaling for safe boot. Use Value: 30μA IQ extends battery reserve time during vehicle sleep mode; out-of-phase operation minimizes conducted EMI in CAN/FlexRay-sensitive environments. |
Use Scenario: Distributed 24V-to-5V/3.3V conversion for isolated analog/digital I/O cards in modular PLC backplanes. IC Role / Device Role / Timing Role: High-reliability DC/DC controller with independent tracking soft-start and overvoltage protection for field-side power domains. Use Value: ±1% output accuracy ensures sensor ADC reference stability; EXTVCC switchover enables efficient local 5V generation from upstream 12V rail. |
| Portable Medical Monitor | Telecom Remote Radio Unit |
Use Scenario: Battery-backed power tree for display backlight (8.5V), processor (1.1V), and comms (3.3V) in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-controller managing high-current backlight and low-noise logic rails with independent soft-start and shutdown. Use Value: Burst Mode® operation maintains >85% efficiency at 100μA load - critical for multi-day battery life; TRACK/SS pins enable synchronized rail ramp-up. |
Use Scenario: 48V-to-12V primary conversion feeding multiple point-of-load regulators in outdoor small-cell base stations. IC Role / Device Role / Timing Role: High-input-voltage controller driving parallel MOSFETs for robust 10A+ intermediate bus with thermal derating. Use Value: 36V max VIN withstands telecom surge transients; phase-lockable frequency enables EMI spread-spectrum alignment with other system clocks. |
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 | Fixed 500kHz frequency; no PLL sync; lower IQ (25μA); no EXTVCC option | Lacks phase synchronization and EXTVCC flexibility - suitable only for standalone, non-daisy-chained designs | Choose MP2918GL-Z for cost-sensitive, single-rail applications where frequency agility and multi-phase coordination are unnecessary. |
| ISL8113IRZ-T7A | Wider VIN (4.5V–60V); higher max fSW (1MHz); includes PMBus interface; 45μA IQ | Supports higher input voltages and digital telemetry - adds complexity for analog-only systems | Choose ISL8113IRZ-T7A when 60V input capability, telemetry, or >650kHz switching is required - not drop-in compatible. |
Compared with MP2918GL-Z and ISL8113IRZ-T7A, the LTC3826IUH#TRPBF uniquely combines sub-30μA quiescent current, 180° out-of-phase operation, PLL synchronization, and EXTVCC switchover - making it optimal for thermally constrained, multi-rail battery or automotive systems demanding both efficiency and timing control.
Availability
LTC3826IUH#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and portable medical monitors requiring stable component supply, long-lifecycle support, and guaranteed -40°C to +85°C operation.
Supply support for LTC3826IUH#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 acquired Linear Technology in 2017 and maintains its high-performance power management portfolio, emphasizing precision, efficiency, and reliability for demanding analog-intensive applications.
The LTC3826IUH#TRPBF belongs to Linear's high-efficiency synchronous controller family, designed specifically for dual-rail, multi-phase DC/DC conversion in automotive, industrial, and battery-powered systems where low IQ, tight regulation, and flexible light-load operation are critical.
FAQ
What is the operating temperature range for the LTC3826IUH#TRPBF?
The LTC3826IUH#TRPBF is specified for –40°C to +85°C ambient operation and is qualified to this range per manufacturer testing. Its thermal design relies on proper soldering of the exposed pad (Pin 33) to PCB ground to achieve θJA = 34°C/W. Derating curves in the datasheet confirm full electrical performance across this range, including ±1% VFB accuracy and 30μA IQ.
How does the LTC3826IUH#TRPBF achieve 30μA quiescent current?
The LTC3826IUH#TRPBF achieves 30μA quiescent current by disabling one channel's control loop and entering sleep mode on the active channel when load drops below threshold. In this state, the ITH pin is parked at 0.425V, internal circuitry is gated, and only essential bias currents remain - verified at TA = 25°C with VIN = 12V and one RUN pin high. Both channels in sleep draw 50μA.
Can the LTC3826IUH#TRPBF drive MOSFETs directly without external drivers?
Yes, the LTC3826IUH#TRPBF integrates high-current gate drivers: TG1/TG2 deliver up to 3A peak source/sink for top N-MOSFETs, and BG1/BG2 provide identical capability for bottom N-MOSFETs. Each driver is optimized for fast rise/fall times (50–90ns) into 3300pF loads - eliminating need for external drivers in most ≤10A applications with standard MOSFETs.
What is the function of the EXTVCC pin on the LTC3826IUH#TRPBF?
The EXTVCC pin on the LTC3826IUH#TRPBF accepts an external 4.7V–10V supply to power the INTVCC rail via a dedicated 7.5V LDO. When EXTVCC exceeds 4.7V, the VIN-fed 5.25V LDO shuts off, reducing power loss and heat generation. This allows efficient use of a pre-regulated rail (e.g., 5V or 8.5V output) to power gate drivers - confirmed in Electrical Characteristics Table (VINTVCCEXT = 7.2–7.8V).
Does the LTC3826IUH#TRPBF support output voltage tracking during startup?
Yes, the LTC3826IUH#TRPBF supports precise output voltage tracking via the TRACK/SS1 and TRACK/SS2 pins. An internal 1μA current source charges an external capacitor connected to these pins, creating a linear voltage ramp. Alternatively, an external resistor divider from another supply can be connected to force VOUT1/VOUT2 to track that reference - detailed in Applications Information section and verified in Figure 13 Circuit and G09 waveform.
LTC3826IUH#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
- 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:
- 32-QFN (5x5)
LTC3826IUH#TRPBF FAQ
1.How can I place an order for LTC3826IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3826IUH#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 LTC3826IUH#TRPBF reliable?
The price and inventory of LTC3826IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3826IUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3826IUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3826IUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3826IUH#TRPBF?
LTC3826IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3826IUH#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 LTC3826IUH#TRPBF?
For technical support, including LTC3826IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3826IUH#TRPBF requirements.
6.How does Aetrix verify that LTC3826IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3826IUH#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 LTC3826IUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3826IUH#TRPBF?
All LTC3826IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3826IUH#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 LTC3826IUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC3826IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3826IUH#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
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…
