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Analog Devices Inc. LTC7804HUD#TRPBF
- Part No.:
- LTC7804HUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC7804HUD#TRPBF.pdf
- Description:
- LOW IQ SYNCH BOOST CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:1,585
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Product details
Overview
LTC7804HUD#TRPBF from Analog Devices is a high-performance synchronous boost DC/DC controller driving all-N-channel MOSFET stages, supporting 4.5V–40V input and up to 40V output, with 14μA no-load quiescent current, spread spectrum EMI reduction, and 100% duty cycle pass-through capability - deployed in automotive infotainment power supplies requiring low-noise, wide-input, high-efficiency step-up conversion.
For engineers reviewing the LTC7804HUD#TRPBF datasheet, LTC7804HUD#TRPBF pinout, LTC7804HUD#TRPBF application, or LTC7804HUD#TRPBF equivalent, key selection criteria include light-load mode behavior (Burst/Pulse-Skipping/Continuous), RSENSE vs DCR current sensing compatibility, phase-lockable frequency range (100kHz–3MHz), thermal performance in QFN-16 package, and AEC-Q100 H-grade qualification for under-hood operation.
Technical Context
The LTC7804HUD#TRPBF implements a constant-frequency peak-current-mode control architecture with dual gate drivers (TG/BG) enabling synchronous N-MOSFET operation, OPTI-LOOP compensation for wide output capacitor/ESR tolerance, and integrated 5.15V INTVCC LDO powered either from VBIAS or EXTVCC ≥4.7V. Its spread spectrum oscillator modulates switching frequency by ±10% when PLLIN/SPREAD = INTVCC.
Light-load operation is configurable via MODE pin: ground → Burst Mode (1.2μA shutdown IQ), INTVCC → forced continuous conduction, or 100kΩ-to-INTVCC → pulse-skipping. Current sensing supports both discrete RSENSE (50mV max threshold) and inductor DCR methods, with SENSE+ capable of sourcing current above INTVCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V operating; starts from 1V after boot using VOUT bias - enables cold-crank support in automotive systems. |
| Output Voltage Range | Up to 40V regulated - supports LED backlighting, industrial sensors, and isolated bias rails. |
| No-Load Quiescent Current | 14μA typical - extends battery runtime in always-on telematics modules. |
| Switching Frequency | Programmable 100kHz–3MHz; phase-lockable - allows EMI filtering optimization and clock synchronization across multi-rail systems. |
| Current Sense Threshold | 50mV typical at SENSE+–SENSE− - enables accurate current limiting with <5mΩ sense resistors or DCR-based sensing. |
| Thermal Rating | Junction temperature range −40°C to +150°C - qualified per AEC-Q100 Grade H for engine control units and ADAS domain controllers. |
| Package | 16-pin 3mm × 3mm QFN with exposed GND pad - achieves θJC = 4.2°C/W for direct PCB thermal vias to internal ground planes. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN (UD package) with exposed GND pad (Pin 17), rated for TJ = −40°C to +150°C, θJA = 68°C/W, θJC = 4.2°C/W. Exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 16) | Switch node connection | Drives external inductor; voltage swings between VIN and VOUT - requires low-inductance layout and Kelvin sensing for stability. |
| TG (Pin 15) | Top-side N-MOSFET gate driver | Floating driver output referenced to SW; supplies BOOST-supplied gate drive - mandates CB/DB bootstrap network with Schottky diode. |
| BG (Pin 13) | Bottom-side N-MOSFET gate driver | Ground-referenced driver with 1.5Ω pull-down resistance - directly drives main switch with minimal dead-time risk. |
| SENSE+ / SENSE− (Pins 5/4) | Differential current sense inputs | Supports RSENSE or DCR sensing; SENSE+ sources current above INTVCC - enables high-side sensing without level shifters. |
| VFB (Pin 6) | Feedback input | Regulates output to 1.200V reference; ±50nA input bias - permits high-impedance resistor dividers for low-power monitoring. |
| ITH (Pin 7) | Error amplifier output & compensation node | Controls peak inductor current; connects to RC/CC network for OPTI-LOOP tuning - determines transient response across load/capacitance variations. |
| RUN (Pin 8) | Enable/shutdown control | 1.2V threshold; <0.7V forces 1.2μA shutdown - supports system-level power sequencing and UVLO implementation. |
| MODE (Pin 11) | Light-load operation selector | GND = Burst Mode, INTVCC = continuous, 100kΩ-to-INTVCC = pulse-skipping - selects efficiency vs ripple trade-off without firmware. |
| PLLIN/SPREAD (Pin 10) | Synchronization & spread spectrum control | INTVCC = spread spectrum dithering (±10%), external clock = phase-lock - reduces EMI peaks without filter redesign. |
| FREQ (Pin 9) | Frequency programming | GND = 375kHz, INTVCC = 2.25MHz, resistor-to-GND = 100kHz–3MHz - sets switching frequency independent of input/output conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum modulation | Reduces peak conducted/radiated EMI by >10dB without adding filters - simplifies CISPR 25 Class 5 compliance in automotive designs. |
| Pass-Thru™ 100% duty cycle | Enables VIN-to-VOUT direct conduction when VIN > VOUT - eliminates reverse current and improves efficiency in wide-input applications like 12V/24V dual-battery systems. |
| OPTI-LOOP compensation | Allows stable loop response across 10μF–1000μF output capacitance and 1mΩ–100mΩ ESR - eliminates re-tuning for different ceramic/tantalum/POE capacitor selections. |
| AEC-Q100 Grade H qualification | Validated for −40°C to +150°C operation with HTOL, TC, and ESD testing - meets functional safety requirements for ASIL-B power subsystems. |
| Low IQ sleep mode | 28μA typical VBIAS current with EXTVCC = 0V - maintains system readiness during vehicle sleep modes without wake-up latency. |
Applications
| Automotive Infotainment Power | Industrial Sensor Bias Supply |
|---|---|
Use Scenario: Powers LCD backlight and audio amplifiers from 9V–16V vehicle battery with cold-crank down to 6V. IC Role / Device Role / Timing Role: Synchronous boost controller regulating 24V/3A output with spread spectrum to meet CISPR 25 radiated emissions limits. Use Value: 14μA quiescent current prevents battery drain during ignition-off; Pass-Thru™ avoids dropout during engine start. |
Use Scenario: Generates stable 15V bias for MEMS pressure transducers and analog front-ends in factory automation PLCs. IC Role / Device Role / Timing Role: Wide-input boost controller with DCR current sensing and OPTI-LOOP for unregulated 12V–36V field bus inputs. Use Value: 150°C junction rating ensures reliability in enclosed enclosures; programmable frequency avoids noise coupling into signal chains. |
| ADAS Camera Module Supply | Telecom Remote Radio Unit (RRU) |
Use Scenario: Supplies 12V rail to image sensor and ISP in rear-view camera with ambient temperature up to 105°C. IC Role / Device Role / Timing Role: AEC-Q100 H-grade boost controller with Burst Mode for low-power standby and forced continuous for active imaging. Use Value: Dual light-load modes reduce thermal stress during parking mode; exposed-pad QFN enables direct heatsinking to metal chassis. |
Use Scenario: Steps up -48V telecom supply to +12V for FPGA and RF ICs in outdoor base station radios. IC Role / Device Role / Timing Role: High-voltage boost controller with 40V absolute max ratings on VBIAS/SW/BOOST pins - withstands line transients. Use Value: 3MHz max frequency allows compact magnetics; phase-lock capability synchronizes with system clock to suppress beat frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4333-AEC1 | Fixed 2.2MHz frequency, no spread spectrum, lower 3.3V–36V VIN range, non-phase-lockable | Targeted at cost-sensitive ADAS cameras where EMI filtering is handled externally | Choose when fixed frequency and smaller solution size outweigh EMI flexibility and wide VIN needs. |
| LTC3780 | Legacy part with higher 100μA IQ, no spread spectrum, MSOP-16 only, no AEC-Q100 H-grade option | Suitable for industrial prototypes where qualification isn't required and thermal margin is ample | Choose only for legacy design refreshes; lacks LTC7804HUD#TRPBF's low-IQ, EMI features, and automotive qualification. |
Compared with MPQ4333-AEC1 and LTC3780, the LTC7804HUD#TRPBF delivers superior EMI performance via spread spectrum, broader input range (1V post-start), and guaranteed AEC-Q100 H-grade operation - making it the preferred choice for new automotive and high-reliability industrial designs demanding low-noise, wide-input, and thermally robust boost regulation.
Availability
LTC7804HUD#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor bias supplies, ADAS camera modules, and telecom remote radio units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC7804HUD#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. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.
The LTC7804 belongs to Analog Devices' Power by Linear™ synchronous controller family, designed specifically for high-efficiency, low-EMI, wide-input DC/DC conversion in automotive, industrial, and communications infrastructure.
FAQ
What is the maximum output voltage supported by the LTC7804HUD#TRPBF?
The LTC7804HUD#TRPBF supports an output voltage up to 40V, as specified in its absolute maximum ratings and electrical characteristics. This limit is enforced by the voltage ratings of internal comparators and gate drivers - exceeding 40V risks damage to the SENSE+, VFB, and BOOST pins. The controller regulates based on feedback from the VFB pin, so external resistor divider selection must ensure VFB remains at 1.200V under all operating conditions, including transients.
Does the LTC7804HUD#TRPBF require an external bootstrap diode?
Yes, the LTC7804HUD#TRPBF requires an external low-leakage Schottky diode connected between the BOOST and INTVCC pins. This diode charges the bootstrap capacitor (CB) during each switching cycle to maintain sufficient gate drive voltage for the top-side N-MOSFET (TG). Without it, the BOOST supply collapses under sustained high-duty-cycle operation, causing TG drive failure and potential shoot-through. The datasheet specifies <100nA leakage for reliable startup and hold-up.
How does the MODE pin affect efficiency and output ripple in the LTC7804HUD#TRPBF?
The MODE pin configures light-load behavior: grounding it enables Burst Mode (lowest IQ, ~14μA, but higher output ripple); tying it to INTVCC forces continuous conduction (lowest ripple, higher IQ ~2mA); using a 100kΩ resistor to INTVCC selects pulse-skipping (moderate ripple and IQ ~500μA). Each mode directly impacts thermal performance and EMI profile - Burst Mode minimizes losses in standby, while continuous mode ensures predictable frequency for EMI filtering.
Can the LTC7804HUD#TRPBF operate with inductor DCR current sensing?
Yes, the LTC7804HUD#TRPBF fully supports inductor DCR current sensing via the SENSE+ and SENSE− pins. It includes dedicated circuitry to reject common-mode voltage shifts and compensate for DCR temperature drift. When using DCR sensing, the ITH voltage adjusts dynamically to maintain consistent current limit accuracy across temperature - eliminating need for external thermistors or complex compensation networks required by older controllers.
What is the purpose of the EXTVCC pin on the LTC7804HUD#TRPBF?
The EXTVCC pin on the LTC7804HUD#TRPBF provides an alternative power source for the internal 5.15V INTVCC LDO. When EXTVCC ≥4.7V, the device disables the VBIAS-powered LDO and uses EXTVCC instead - improving overall system efficiency by avoiding linear regulator losses when a clean, efficient downstream supply (e.g., from a buck converter) is available. If unused, EXTVCC must be tied to GND to prevent floating node issues.
LTC7804HUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 40V
- Frequency - Switching:
- 100kHz ~ 3MHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC7804HUD#TRPBF FAQ
1.How can I place an order for LTC7804HUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7804HUD#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 LTC7804HUD#TRPBF reliable?
The price and inventory of LTC7804HUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7804HUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7804HUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7804HUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7804HUD#TRPBF?
LTC7804HUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7804HUD#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 LTC7804HUD#TRPBF?
For technical support, including LTC7804HUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7804HUD#TRPBF requirements.
6.How does Aetrix verify that LTC7804HUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7804HUD#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 LTC7804HUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7804HUD#TRPBF?
All LTC7804HUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7804HUD#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 LTC7804HUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC7804HUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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