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Analog Devices Inc. LTC7813HUH#TRPBF
- Part No.:
- LTC7813HUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC7813HUH#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
LTC7813HUH#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance synchronous dual-channel Boost+Buck DC/DC controller driving all-N-channel MOSFET stages. It integrates independent boost and buck controllers supporting input voltages from 4.5V to 60V, output regulation up to 60V, and ultra-low quiescent current of 34µA (both channels active). It enables automotive cold-crank operation down to 2.2V after startup and delivers fast transient response in battery-powered industrial power systems.
For engineers reviewing the LTC7813HUH#TRPBF datasheet, LTC7813HUH#TRPBF pinout, LTC7813HUH#TRPBF application, or LTC7813HUH#TRPBF equivalent, key selection criteria include its cascaded topology for continuous input/output current, OPTI-DRIVE gate voltage programmability (5–10V), phase-lockable frequency range (75–850 kHz), RSENSE/DCR current sensing, and H-grade 150°C junction temperature rating.
Technical Context
The LTC7813HUH#TRPBF implements a true cascaded architecture: the boost stage feeds the buck stage, enabling VIN above, below, or equal to VOUT while maintaining non-pulsating input and output currents-reducing EMI and ripple versus conventional buck-boost topologies. Its dual independent control loops feature separate feedback (VFB1/VFB2), compensation (ITH1/ITH2), and soft-start (TRACK/SS1/SS2) points.
It supports three light-load modes via PLLIN/MODE pin configuration: Burst Mode® (lowest IQ), pulse-skipping, or forced continuous conduction. Gate drive is optimized with programmable DRVCC (5–10V), integrated bootstrap supplies (BOOST1/BOOST2), and precise current limit thresholds set by ILIM pin (50/75/100 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V main bias; operates down to 2.2V after startup when biased from boost output |
| Buck Output Range | 0.8V to 60V regulated; feedback reference VFB1 = 0.800V ±12mV over temperature |
| Boost Output Range | Up to 60V; VFB2 reference selectable as 1.200V (external), 10V, or 12V via VPRG2 pin |
| Quiescent Current | 34µA with both channels active in sleep mode; 3.6µA shutdown current |
| Switching Frequency | Programmable 75–850 kHz; synchronizable to external clock via PLLIN/MODE pin |
| Junction Temp Range | –40°C to +150°C (H-grade); validated for automotive under-hood and industrial high-temp environments |
| Package | 32-pin 5mm × 5mm QFN (UH); exposed pad required for thermal performance (θJA = 44°C/W) |
Pinout & Package
Package: 32-lead plastic QFN (5mm × 5mm), UH package. Exposed pad (Pin 33) is GND and must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 (1, 30) | Switch node connections | Direct connection points to buck and boost inductor switches; high dV/dt nodes requiring tight layout |
| TG1, TG2 (2, 29) | Top-gate drivers | Floating N-channel gate drives referenced to SW nodes; swing = DRVCC above SW voltage |
| BG1, BG2 (31, 27) | Bottom-gate drivers | Ground-referenced N-channel gate drives; swing = 0V to DRVCC |
| VFB1, VFB2 (6, 19) | Buck/boost feedback inputs | High-impedance inputs sensing output divider ratio; VFB1 = 0.800V, VFB2 = 1.200V/10V/12V depending on VPRG2 |
| SENSE1+, SENSE1– (7, 8) SENSE2+, SENSE2– (12, 13) | Differential current sense inputs | Enable lossless DCR or RSENSE sensing; common-mode range up to 60V (SENSE2+), supports bidirectional current detection |
| RUN1, RUN2 (16, 17) | Channel enable controls | Independent enable/disable per channel; <1.2V disables channel, <0.7V shuts down entire IC |
| PLLIN/MODE (10) | Synchronization & light-load mode select | Accepts external clock for synchronization; configures Burst Mode®, pulse-skipping, or forced CCM |
| DRVSET (22) | Gate drive voltage programming | Sets DRVCC to 6V (GND), 10V (INTVCC), or intermediate value (50k–100k resistor to GND) |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded Boost+Buck topology | Enables seamless regulation across wide VIN–VOUT relationships while eliminating pulsating input/output currents and reducing EMI filter size |
| OPTI-DRIVE gate voltage control | Programmable DRVCC (5–10V) optimizes FET RDS(on) vs switching loss trade-off for diverse MOSFET selections |
| Three selectable light-load modes | Burst Mode® (29µA IQ), pulse-skipping, or forced CCM-enabling runtime optimization without sacrificing transient response |
| Flexible current sensing | Supports precision RSENSE or lossless DCR sensing with programmable trip thresholds (50/75/100 mV) via ILIM pin |
| Robust automotive-grade thermal rating | H-grade (–40°C to +150°C) qualification ensures reliable operation in engine control units, ADAS power supplies, and industrial motor drives |
Applications
| Automotive Engine Control Unit (ECU) Power Supply | Industrial Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and analog sensors in under-hood ECU where input dips to 2.2V during cold-crank. IC Role / Device Role / Timing Role: Dual-stage controller regulating stable 5V/3.3V rails from 6–16V battery with seamless dropout recovery. Use Value: Maintains regulation through cold-crank events without brownout; 34µA IQ extends backup battery life during sleep mode. | Use Scenario: Generates isolated 24V and 5V outputs from 12–48V industrial bus for field I/O and logic circuitry. IC Role / Device Role / Timing Role: Cascaded controller delivering low-noise, low-ripple outputs with independent loop tuning for mixed-signal loads. Use Value: Continuous input current reduces conducted EMI; phase-lockable frequency avoids beat frequencies with other system clocks. |
| High-Power Portable Test Equipment | Battery-Operated Medical Monitoring Device |
Use Scenario: Powers FPGA, ADC, and RF front-end from 2S–4S Li-ion battery (6–16.8V) with dynamic load steps up to 10A. IC Role / Device Role / Timing Role: Dual-output controller delivering 12V for analog section and 1.2V for core logic with fast transient response. Use Value: Independent ITH1/ITH2 compensation enables optimized loop stability per rail; 80ns/120ns min-on-times support high-frequency, small-inductor designs. | Use Scenario: Supplies ultra-low-noise 3.3V and 5V rails to patient monitoring sensors and wireless MCU from primary Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Boost+Buck controller generating regulated outputs with minimal input/output ripple for sensitive analog front-ends. Use Value: Non-pulsating currents reduce EMI coupling into sensor signals; 29µA single-channel IQ maximizes battery runtime in standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-stage synchronous controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7811IUH#TRPBF | Same architecture but I-grade (–40°C to 125°C); no H-grade thermal rating | Not qualified for under-hood automotive or extended-temperature industrial use | Select only if ambient operating temperature remains ≤125°C and automotive AEC-Q100 is not required |
| LTC3891EFE#PBF | Single-channel 60V synchronous buck controller with integrated LDO; lacks boost stage and cascaded capability | Cannot regulate VOUT > VIN or handle cold-crank dips below 4.5V without external boost pre-regulator | Choose when only buck conversion is needed and cost-sensitive single-rail design is acceptable |
Compared with LTC7811IUH#TRPBF, the LTC7813HUH#TRPBF provides guaranteed 150°C operation and enhanced cold-crank resilience; compared with LTC3891EFE#PBF, it uniquely enables VIN-agnostic regulation via integrated boost+buck topology-eliminating external pre-regulators in wide-input applications.
Availability
LTC7813HUH#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC power modules, and high-reliability battery-operated test equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC7813HUH#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 legacy of high-performance analog and power management ICs with rigorous automotive and industrial qualification standards.
The LTC7813HUH#TRPBF belongs to Linear's high-voltage synchronous controller product line, designed specifically for demanding power architectures requiring wide input range, ultra-low IQ, and robust thermal performance in harsh environments.
FAQ
What is the minimum input voltage the LTC7813HUH#TRPBF can operate from after startup?
The LTC7813HUH#TRPBF can operate from an input supply as low as 2.2V after startup when biased from the output of its internal boost regulator. This enables reliable operation during automotive cold-crank events where battery voltage dips below 4.5V-the normal minimum VBIAS operating range. The 2.2V capability is contingent on proper boost stage configuration and sufficient output capacitance to sustain bias during deep dips.
How does the VPRG2 pin configure the boost output voltage on the LTC7813HUH#TRPBF?
The VPRG2 pin on the LTC7813HUH#TRPBF selects the boost output regulation mode: grounding VPRG2 enables adjustable output using external resistors with VFB2 = 1.200V reference; floating VPRG2 sets fixed 10V output; tying VPRG2 to INTVCC sets fixed 12V output. This eliminates external feedback dividers for standard voltages while retaining flexibility for custom outputs-directly impacting bill-of-materials count and layout simplicity.
Can the LTC7813HUH#TRPBF synchronize to an external clock, and how is it configured?
Yes, the LTC7813HUH#TRPBF supports external clock synchronization via the PLLIN/MODE pin. Applying a clean CMOS clock signal (75–850 kHz) to this pin locks both boost and buck switching edges to the external source, eliminating beat frequencies in multi-rail systems. Synchronization also forces forced continuous conduction mode-critical for noise-sensitive applications like medical imaging or precision instrumentation where subharmonic artifacts must be avoided.
What are the gate drive voltage options for the LTC7813HUH#TRPBF, and how are they set?
The LTC7813HUH#TRPBF provides programmable gate drive voltage (DRVCC) from 5V to 10V via the DRVSET pin. Connecting DRVSET to GND sets DRVCC = 6V; connecting to INTVCC sets DRVCC = 10V; using a 50k–100kΩ resistor to GND achieves intermediate values (e.g., 5.0V, 6.4V, 9.0V). This OPTI-DRIVE feature allows optimization of RDS(on) conduction loss versus gate charge switching loss for specific MOSFETs-directly affecting efficiency and thermal design.
Does the LTC7813HUH#TRPBF support lossless current sensing, and what interfaces are used?
Yes, the LTC7813HUH#TRPBF supports lossless current sensing using the inductor's DCR. It employs differential SENSE1+/SENSE1– and SENSE2+/SENSE2– inputs with programmable gain and offset to measure voltage across a small series resistor or DCR network. The IC includes dedicated current comparator circuitry with trip thresholds configurable via the ILIM pin (50/75/100 mV), enabling accurate cycle-by-cycle current limiting without added power loss from shunt resistors.
LTC7813HUH#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 60V
- Frequency - Switching:
- 105kHz ~ 835kHz, 350kHz ~ 535kHz
- Duty Cycle (Max):
- 96%, 99%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC7813HUH#TRPBF FAQ
1.How can I place an order for LTC7813HUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7813HUH#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 LTC7813HUH#TRPBF reliable?
The price and inventory of LTC7813HUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7813HUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7813HUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7813HUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7813HUH#TRPBF?
LTC7813HUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7813HUH#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 LTC7813HUH#TRPBF?
For technical support, including LTC7813HUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7813HUH#TRPBF requirements.
6.How does Aetrix verify that LTC7813HUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7813HUH#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 LTC7813HUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7813HUH#TRPBF?
All LTC7813HUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7813HUH#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 LTC7813HUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC7813HUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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