My Inquiry
My Account
Analog Devices Inc. LTC7804IUD#TRPBF
- Part No.:
- LTC7804IUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC7804IUD#TRPBF.pdf
- Description:
- LOW IQ SYNCH BOOST CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:2,878
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7804IUD#TRPBF from Analog Devices is a high-performance synchronous boost DC/DC controller driving all-N-channel MOSFET stages, featuring 14μA no-load quiescent current, spread spectrum EMI reduction, and 100kHz–3MHz programmable switching frequency. It operates from 4.5V–40V input (down to 1V post-startup), delivers up to 40V output, and supports Pass-Thru™ 100% duty cycle - ideal for automotive infotainment power rails and industrial 24V bus boost converters.
For engineers reviewing the LTC7804IUD#TRPBF datasheet, LTC7804IUD#TRPBF pinout, LTC7804IUD#TRPBF application, or LTC7804IUD#TRPBF equivalent, key selection criteria include light-load efficiency mode selection (Burst/Pulse-Skipping/Continuous), RSENSE or DCR current sensing flexibility, OPTI-LOOP compensation tuning, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC7804IUD#TRPBF implements a constant-frequency peak current-mode control architecture with dual gate drivers (TG/BG) optimized for N-channel synchronous rectification. Its transconductance error amplifier (gm = 2 mmho) and 1.2V ±1.2% feedback reference enable precise output regulation across wide output capacitance and ESR ranges via OPTI-LOOP compensation.
Spread spectrum dithering (0–20% frequency deviation) is enabled via PLLIN/SPREAD pin tied to INTVCC, reducing peak conducted/radiated EMI without external filters. The controller supports phase-locking to external clocks (0.1–3MHz), selectable light-load operation modes via MODE pin, and dual-power-source biasing (VBIAS or EXTVCC ≥4.7V) for system-level efficiency optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V (operates down to 1V after startup - enables cold-crank battery support) |
| Output Voltage Range | Up to 40V (supports 24V/36V industrial and automotive auxiliary rails) |
| No-Load Quiescent Current | 14μA (extends runtime in always-on battery systems like telematics modules) |
| Switching Frequency | 100kHz to 3MHz, programmable via resistor or phase-lockable - enables compact magnetics and noise-sensitive RF co-location |
| Feedback Reference Voltage | 1.200V ±1.2% (tight tolerance ensures ±1% output accuracy with standard resistors) |
| Current Sense Threshold | 50mV typical (low-loss sensing with RSENSE ≤10mΩ or DCR-based designs) |
| Shutdown Current | 1.2μA (minimizes standby drain in ignition-off vehicle subsystems) |
| Operating Temperature | −40°C to +125°C junction (AEC-Q100 qualified I-grade - validated for under-hood deployment) |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN with exposed thermal pad (Pin 17 = GND). Requires soldering of exposed pad for θJC = 4.2°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 16) | Switch Node | Connects to inductor and source of bottom MOSFET; high dv/dt node requiring tight layout and Kelvin sensing |
| TG (Pin 15) | Top Gate Driver Output | Floating driver output referenced to SW; drives gate of high-side N-MOSFET via BOOST capacitor |
| BG (Pin 13) | Bottom Gate Driver Output | Ground-referenced driver (0V to INTVCC); drives gate of low-side N-MOSFET with 1.5Ω pull-down |
| BOOST (Pin 14) | Bootstrap Supply | Charged via internal charge pump; supplies TG driver - requires Schottky diode to INTVCC and ceramic capacitor to SW |
| SENSE+ / SENSE− (Pins 5/4) | Differential Current Sense Inputs | Enable RSENSE or DCR sensing; 50mV threshold allows <10mΩ shunt or low-DCR inductors |
| VFB (Pin 6) | Feedback Input | 1.2V reference point; sets output voltage via resistor divider - high-impedance (±50nA) minimizes divider error |
| ITH (Pin 7) | Error Amplifier Output | Compensation node for OPTI-LOOP; connects RC network to GND for transient response tuning |
| RUN (Pin 8) | Enable/Shutdown Control | 1.2V threshold with 100mV hysteresis; <0.7V forces 1.2μA shutdown - supports UVLO implementation |
| MODE (Pin 11) | Light-Load Operation Mode Select | GND = Burst Mode; INTVCC = Continuous; 100k-to-GND = Pulse-Skipping - direct hardware-selectable efficiency tradeoff |
| PLLIN/SPREAD (Pin 10) | Sync Input / Spread Spectrum Enable | Tie to INTVCC for EMI reduction; tie to external clock (0.1–3MHz) for synchronization - no external PLL components needed |
Key Features
| Feature | Design Value |
|---|---|
| Spread Spectrum Operation | Reduces peak EMI by >10dB without adding filter components - simplifies CISPR 25 Class 5 compliance in automotive designs |
| OPTI-LOOP Compensation | Enables stable loop response across 10μF–1000μF output capacitors and 5–100mΩ ESR - eliminates re-tuning for different capacitor families |
| Pass-Thru™ 100% Duty Cycle | Allows VOUT to track VIN when VIN > VOUT - eliminates dropout during input transients and enables seamless buck-boost transitions |
| RSENSE or Inductor DCR Sensing | Supports both discrete shunts and lossless DCR sensing - reduces BOM count and improves thermal efficiency in high-current apps |
| AEC-Q100 Qualified (Grade I) | Validated for −40°C to +125°C operation with HTOL, TC, and ESD testing - meets automotive functional safety prerequisites |
| Low IQ Sleep Mode | 14μA operating current at light loads - extends battery life in always-on ADAS cameras and remote sensors |
Applications
| Automotive Infotainment Power | Industrial 24V Bus Boost |
|---|---|
|
Use Scenario: Powering 12V-to-24V conversion for LCD displays and audio amplifiers in vehicles with wide battery range (6V–16V). IC Role / Device Role / Timing Role: Primary synchronous boost controller managing input undervoltage lockout, soft-start sequencing, and EMI-constrained switching. Use Value: 14μA IQ extends display-on time during engine-off; spread spectrum avoids interference with AM/FM radio bands. |
Use Scenario: Generating stable 36V rail from 24V industrial PLC backplane for analog I/O modules and field transmitters. IC Role / Device Role / Timing Role: High-efficiency boost controller with DCR current sensing and OPTI-LOOP for varying load profiles and temperature drift. Use Value: 100% duty cycle Pass-Thru™ maintains output during brownouts; AEC-Q100 grade ensures reliability in harsh factory environments. |
| Telecom Remote Radio Unit | Military Avionics Power |
|
Use Scenario: Providing 40V bias supply for GaN PA stages in 5G small cells powered from 28V telecom batteries. IC Role / Device Role / Timing Role: High-frequency (2.25MHz) boost controller enabling compact 2.2μH inductors and minimizing board area. Use Value: Programmable 100kHz–3MHz frequency avoids sensitive IF bands; low-noise operation preserves signal integrity. |
Use Scenario: Generating regulated 28V from 24V aircraft bus for mission-critical flight control sensors with strict EMI limits. IC Role / Device Role / Timing Role: AEC-Q100 qualified boost controller with phase-lock capability to synchronize with avionics master clock. Use Value: Phase-locked operation eliminates beat frequencies; 1.2μA shutdown current meets MIL-STD-704E standby requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8337EMSE#TRPBF | Fixed 2MHz frequency, no spread spectrum, no phase-lock, 28V max VOUT, 500mA integrated switch (not controller) | Suitable for lower-power, cost-sensitive non-automotive apps where EMI filtering is handled externally | Select when board space is critical and integrated switch suffices; not drop-in due to different topology and voltage limits |
| TPS61088RHLR | Integrated 12A switch, 4.5V–12.6V input, 2.7V–12.6V output, no spread spectrum, no AEC-Q100 rating | Targeted at portable electronics (USB PD, tablets) - lacks automotive qualification and high-VOUT capability | Choose for consumer-grade 5V/9V/12V boost where integration outweighs EMI and qualification needs |
Compared with LT8337EMSE#TRPBF and TPS61088RHLR, the LTC7804IUD#TRPBF uniquely combines AEC-Q100 qualification, 40V output capability, spread spectrum, and phase-locking - making it the only option for high-reliability, high-voltage, EMI-sensitive automotive and industrial boost applications.
Availability
LTC7804IUD#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment power, industrial 24V bus boost, and telecom remote radio unit applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC7804IUD#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, and automotive markets since 1965.
The LTC7804 belongs to Analog Devices' Power by Linear™ controller family, designed specifically for high-efficiency, low-EMI, and automotive-qualified DC/DC conversion in demanding environments.
FAQ
What is the minimum input voltage required for startup of the LTC7804IUD#TRPBF?
The LTC7804IUD#TRPBF requires a minimum 4.5V on VBIAS to initiate startup. Once running and biased from the output, it sustains operation down to 1V input - enabling compatibility with automotive cold-crank conditions (e.g., 6V battery sag) while maintaining regulated output.
How does the MODE pin configuration affect efficiency in light-load conditions for the LTC7804IUD#TRPBF?
The MODE pin directly selects the light-load strategy: GND enables Burst Mode® (14μA IQ, lowest idle loss), INTVCC forces continuous conduction (higher ripple, best transient response), and a 100kΩ pull-up enables pulse-skipping (midpoint efficiency/ripple tradeoff). All three are hardware-configurable without firmware.
Can the LTC7804IUD#TRPBF be synchronized to an external clock, and what is the supported frequency range?
Yes - the LTC7804IUD#TRPBF supports external synchronization via the PLLIN/SPREAD pin over 0.1MHz to 3MHz. When an external clock is applied, the BG driver's rising edge locks to the clock's rising edge, eliminating beat frequencies in multi-rail systems and easing EMI filter design.
What thermal considerations apply to the LTC7804IUD#TRPBF in its 3mm × 3mm QFN package?
The LTC7804IUD#TRPBF QFN package has θJC = 4.2°C/W but requires the exposed pad (Pin 17) to be soldered to a thermal plane. Without proper pad connection, θJA degrades to 68°C/W - risking thermal shutdown above 2A output current. Layout must include ≥4 thermal vias under the pad.
Does the LTC7804IUD#TRPBF support both RSENSE and inductor DCR current sensing, and how is selection implemented?
Yes - the LTC7804IUD#TRPBF supports both methods via the same SENSE+/SENSE− pins. RSENSE uses a discrete shunt resistor; DCR sensing leverages the inductor's inherent resistance with optional RC network for zero-crossing compensation. No configuration pins or registers are needed - sensing type is determined by external circuitry only.
LTC7804IUD#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC7804IUD#TRPBF FAQ
1.How can I place an order for LTC7804IUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7804IUD#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 LTC7804IUD#TRPBF reliable?
The price and inventory of LTC7804IUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7804IUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7804IUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7804IUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7804IUD#TRPBF?
LTC7804IUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7804IUD#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 LTC7804IUD#TRPBF?
For technical support, including LTC7804IUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7804IUD#TRPBF requirements.
6.How does Aetrix verify that LTC7804IUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7804IUD#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 LTC7804IUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7804IUD#TRPBF?
All LTC7804IUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7804IUD#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 LTC7804IUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC7804IUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7804IUD#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…
