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Analog Devices Inc. LTC7804IMSE#TRPBF
- Part No.:
- LTC7804IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC7804IMSE#TRPBF.pdf
- Description:
- LOW IQ SYNCH BOOST CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:4,987
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Product details
Overview
LTC7804IMSE#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, 4.5V–40V input range (down to 1V post-startup), 40V max output, spread spectrum EMI reduction, and phase-lockable 100kHz–3MHz switching frequency - deployed in automotive infotainment power supplies requiring low-noise 12V-to-24V conversion.
For engineers reviewing the LTC7804IMSE#TRPBF datasheet, LTC7804IMSE#TRPBF pinout, LTC7804IMSE#TRPBF application, or LTC7804IMSE#TRPBF equivalent, key selection criteria include light-load efficiency mode selection (Burst/Pulse-Skipping/Continuous), RSENSE/DCR current sensing flexibility, Pass-Thru™ 100% duty cycle capability, OPTI-LOOP compensation adaptability, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC7804IMSE#TRPBF implements a constant-frequency peak-current-mode control architecture with dual gate drivers (TG/BG) supporting N-channel MOSFETs, where ITH voltage directly sets current-sense threshold (45–55mV typ) and regulates loop gain. Its internal 5.15V INTVCC LDO powers logic and drivers, with EXTVCC switchover at 4.7V to enable high-efficiency external biasing.
Spread spectrum dithering (0–20% frequency deviation) is enabled via PLLIN/SPREAD = INTVCC, while external clock synchronization (0.1–3MHz) uses the same pin. The MODE pin configures light-load behavior without changing compensation - Burst Mode reduces IQ to 14μA, Pulse-Skipping maintains fixed frequency, and Forced Continuous ensures ripple-sensitive stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V operating; supports 1V startup when biased from VOUT - enables cold-crank operation in automotive systems. |
| Output Voltage Range | Up to 40V regulated - suitable for industrial LED drivers and telecom intermediate bus conversion. |
| No-Load Quiescent Current | 14μA typical - extends battery runtime in portable test equipment and remote sensors. |
| Switching Frequency | Programmable 100kHz–3MHz or phase-lockable 0.1–3MHz - allows EMI band avoidance and layout optimization. |
| Current Sense Threshold | 50mV typical (45–55mV) - enables accurate overcurrent protection with <1% tolerance RSENSE or DCR sensing. |
| Feedback Reference Voltage | 1.200V ±1.2% (1.188–1.212V) - sets output accuracy for 24V rails with ±0.3% regulation error at full load. |
| Shutdown Current | 1.2μA maximum - meets ultra-low-power system-level sleep requirements. |
| Operating Temperature | –40°C to +125°C junction - qualified per AEC-Q100 Grade I for under-hood automotive use. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm), thermally enhanced with exposed GND pad (Pin 17). Pin pitch: 0.5mm. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 16) | Switch Node | Connects to inductor and source of bottom MOSFET; carries high di/dt switching waveform - requires tight layout and Kelvin sensing for stability. |
| TG (Pin 15) | Top Gate Driver Output | Floating high-side driver (INTVCC-referenced) for N-MOSFET; requires BOOST capacitor and Schottky clamp for bootstrapping. |
| BG (Pin 13) | Bottom Gate Driver Output | Ground-referenced driver for N-MOSFET; 1.5Ω pull-down resistance enables fast turn-off and shoot-through prevention. |
| SENSE+ / SENSE− (Pins 3 & 2) | Differential Current Sense Inputs | Accept RSENSE or DCR sensing; common-mode range up to 40V - supports high-side or low-side current monitoring. |
| VFB (Pin 4) | Feedback Input | Compares output divider voltage to 1.200V reference; ±50nA input bias enables high-impedance dividers for low-power standby. |
| ITH (Pin 5) | Error Amplifier Output | Directly controls current limit and loop compensation; connects to RC network for OPTI-LOOP transient optimization. |
| RUN (Pin 6) | Enable/Shutdown Control | 1.2V threshold with 100mV hysteresis - supports UVLO implementation or microcontroller GPIO control. |
| MODE (Pin 9) | Light-Load Operation Select | GND = Burst Mode (14μA IQ), INTVCC = Continuous, 100kΩ-to-INTVCC = Pulse-Skipping - no compensation change required. |
| PLLIN/SPREAD (Pin 8) | Synchronization & Spread Spectrum | INTVCC = spread spectrum enabled; external clock = phase-locked operation - single pin handles both EMI reduction and timing coordination. |
| INTVCC (Pin 10) | Internal 5.15V LDO Output | Powers gate drivers and analog circuitry; requires ≥4.7μF ceramic decoupling - critical for noise immunity and startup reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Spread Spectrum Modulation | Reduces peak conducted/radiated EMI by >10dB across 100kHz–3MHz band - simplifies FCC/CE compliance without added filtering. |
| Pass-Thru™ 100% Duty Cycle | Enables seamless VIN-to-VOUT pass-through when VIN > VOUT - eliminates dropout in automotive start-stop systems during voltage sag. |
| OPTI-LOOP Compensation | Allows stable loop response across 10μF–1000μF output capacitance and 5mΩ–100mΩ ESR - supports polymer, ceramic, or hybrid capacitor selections. |
| RSENSE or Inductor DCR Sensing | Eliminates need for dedicated current-sense resistor - reduces BOM cost and board space while maintaining ±3% current limit accuracy. |
| AEC-Q100 Qualified | Validated for automotive Grade I (–40°C to +125°C) with HTOL, TC, and ESD testing - meets ASIL-B functional safety support requirements. |
| Low Minimum On-Time (80ns) | Supports high step-up ratios (e.g., 3.3V→24V) at 2.25MHz - enables compact magnetics and high-density PCB layouts. |
Applications
| Automotive Infotainment Power | Industrial 24V Bus Converter |
|---|---|
Use Scenario: Powering LCD displays and audio amplifiers from 9–16V battery rail in vehicles with stop-start functionality. IC Role / Device Role / Timing Role: Synchronous boost controller regulating 24V output with Pass-Thru™ mode enabling direct battery feed during cranking. Use Value: Maintains display backlight and audio operation during 6V cold-crank events without brownout, leveraging 1V startup capability and 100% duty cycle. |
Use Scenario: Generating isolated 24V supply from 12V factory automation PLC backplane for field I/O modules. IC Role / Device Role / Timing Role: High-efficiency boost stage preceding isolated DC/DC converter; operates at 500kHz to minimize EMI coupling into analog sensor signals. Use Value: 95% peak efficiency at 6A load reduces thermal stress on enclosure-mounted PCBs; spread spectrum avoids interference with 4–20mA current loop receivers. |
| Telecom Intermediate Bus | Portable Test Equipment Supply |
Use Scenario: Providing 40V intermediate bus from 24V telecom shelf supply to drive RF power amplifiers. IC Role / Device Role / Timing Role: Primary non-isolated boost controller with programmable 2.25MHz switching to shrink magnetics and fit dense card-edge layouts. Use Value: 40V output rating and 3MHz max frequency enable single-stage conversion, eliminating cascaded converters and improving overall system efficiency by 8%. |
Use Scenario: Battery-powered oscilloscope front-end requiring clean ±15V analog rails from single-cell Li-ion (2.7–4.2V). IC Role / Device Role / Timing Role: Low-IQ boost controller powering precision op-amp supplies; Burst Mode maintains 14μA quiescent draw during idle. Use Value: Extends 2000mAh battery life to >12 hours in standby; OPTI-LOOP ensures stable regulation despite wide temperature-induced capacitor ESR variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5122MTX/NOPB | Higher 100μA IQ; no spread spectrum; 3.5V min VIN; 65V max VOUT | Preferred for high-VOUT industrial supplies (>40V), but lacks automotive qualification and EMI features | Select when output >40V is required and EMI compliance is handled externally. |
| MAX17595ATP+ | Fixed 100kHz–2.2MHz range; 25μA IQ; no Pass-Thru™ mode; 4.5V–60V input | Targets high-reliability industrial systems; lacks AEC-Q100 and burst-mode efficiency optimization | Choose for cost-sensitive 60V-input applications where 14μA IQ and cold-crank support are not critical. |
Compared with LM5122MTX/NOPB and MAX17595ATP+, the LTC7804IMSE#TRPBF delivers superior light-load efficiency (14μA vs ≥25μA), integrated EMI mitigation (spread spectrum), automotive qualification, and seamless VIN-to-VOUT pass-through - making it optimal for battery-constrained and noise-sensitive automotive/industrial designs.
Availability
LTC7804IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial 24V bus converters, telecom intermediate bus generation, and portable test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for LTC7804IMSE#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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTC7804 belongs to Analog Devices' Power by Linear™ synchronous controller family, designed specifically for high-efficiency, low-EMI DC/DC conversion in automotive, industrial, and telecom applications demanding robustness and design flexibility.
FAQ
What is the minimum input voltage required for startup of the LTC7804IMSE#TRPBF?
The LTC7804IMSE#TRPBF can start up with an input voltage as low as 1V when biased from its own output (VBIAS connected to VOUT). This capability is essential for automotive cold-crank scenarios where battery voltage dips below 6V. Once running, it sustains operation down to 4.5V from the main input rail. Startup behavior is independent of the MODE or RUN pin configuration.
How does the MODE pin affect efficiency and output ripple in the LTC7804IMSE#TRPBF?
The MODE pin selects light-load operating mode: GND enables Burst Mode (14μA IQ, discontinuous conduction, higher ripple), INTVCC forces Continuous Conduction Mode (higher IQ, lowest ripple), and a 100kΩ resistor to INTVCC selects Pulse-Skipping (fixed frequency, moderate ripple/IQ). All modes retain identical loop compensation - no re-tuning needed when switching between them.
Can the LTC7804IMSE#TRPBF be synchronized to an external clock, and what is the valid frequency range?
Yes, the LTC7804IMSE#TRPBF supports external synchronization via the PLLIN/SPREAD pin. When driven by a clean CMOS clock, it locks to frequencies from 0.1MHz to 3MHz with ±100ps jitter. During sync, it operates in Pulse-Skipping or Forced Continuous mode depending on the MODE pin state - Burst Mode is disabled during synchronization.
What package type and thermal characteristics apply to the LTC7804IMSE#TRPBF?
The LTC7804IMSE#TRPBF uses a 16-lead MSOP package (3mm × 4.9mm) with exposed GND pad (Pin 17). Its thermal resistance is θJA = 40°C/W and θJC = 10°C/W. Full rated performance requires soldering the exposed pad to a ≥100mm² copper pour. This package supports AEC-Q100 Grade I operation from –40°C to +125°C junction temperature.
Does the LTC7804IMSE#TRPBF support both RSENSE and inductor DCR current sensing, and how is sensing configured?
Yes, the LTC7804IMSE#TRPBF supports both methods via the SENSE+ and SENSE− pins. For RSENSE, connect the resistor between SW and GND (low-side) or between VIN and switch node (high-side). For DCR sensing, add RC network (RC, CC) from SENSE+ to SW and SENSE− to GND to compensate for inductor parasitics. No hardware changes are needed - only compensation network adjustment.
LTC7804IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) 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-MSOP-EP
LTC7804IMSE#TRPBF FAQ
1.How can I place an order for LTC7804IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7804IMSE#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 LTC7804IMSE#TRPBF reliable?
The price and inventory of LTC7804IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7804IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7804IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7804IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7804IMSE#TRPBF?
LTC7804IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7804IMSE#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 LTC7804IMSE#TRPBF?
For technical support, including LTC7804IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7804IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC7804IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7804IMSE#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 LTC7804IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7804IMSE#TRPBF?
All LTC7804IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7804IMSE#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 LTC7804IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC7804IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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