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Analog Devices Inc. LTC7804EMSE#TRPBF
- Part No.:
- LTC7804EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC7804EMSE#TRPBF.pdf
- Description:
- LOW IQ SYNCH BOOST CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
LTC7804EMSE#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 programmable 100kHz–3MHz 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 LTC7804EMSE#TRPBF datasheet, LTC7804EMSE#TRPBF pinout, LTC7804EMSE#TRPBF application, or LTC7804EMSE#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 LTC7804EMSE#TRPBF implements a constant-frequency peak-current-mode control architecture with dual gate drivers (TG/BG) supporting N-channel top/bottom MOSFETs. Its internal 5.15V INTVCC LDO powers control logic and drivers, while EXTVCC enables external supply bypass at >4.7V - reducing bias losses in high-efficiency systems.
Spread spectrum dithering (enabled via PLLIN/SPREAD = INTVCC) modulates switching frequency by ±10% to suppress conducted/EMI peaks; phase-lock capability (PLLIN/SPREAD = external clock) synchronizes BG edge to external timing sources. The MODE pin selects among Burst Mode (1.2μA shutdown IQ), pulse-skipping, or forced continuous conduction - directly impacting light-load efficiency and output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V–40V main supply; operates down to 1V after startup when biased from VOUT - enables cold-crank automotive operation. |
| Output Voltage Range | Up to 40V regulated output - supports wide-range industrial and telecom power rails. |
| No-Load Quiescent Current | 14μA typical - extends battery runtime in always-on sensor nodes and telematics modules. |
| Switching Frequency | Programmable 100kHz–3MHz (RFREQ-based) or phase-lockable 0.1–3MHz - allows EMI optimization and magnetics size reduction. |
| Current Sensing | RSENSE or inductor DCR sensing - enables flexible, low-loss current monitoring without sense resistor power loss. |
| Feedback Reference | 1.200V ±12mV over temperature - ensures precise output regulation across –40°C to 125°C junction range. |
| Shutdown Current | 1.2μA max - critical for zero-power standby modes in automotive body control units. |
| Package | 16-pin MSOP (3mm × 3mm exposed pad) - thermally enhanced for 125°C continuous operation with θJA = 40°C/W. |
Pinout & Package
Package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND), rated for –40°C to +125°C junction temperature. Exposed pad must be soldered to PCB for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SS (Pin 1) | Soft-start ramp control | Internal 12.5μA pull-up charges external capacitor; sets linear VOUT ramp time (1ms/10nF) - prevents inrush current during power-up. |
| SENSE− (Pin 2) | Negative current sense input | Differential input to current comparator; paired with SENSE+ to set peak inductor current threshold - enables accurate overcurrent protection. |
| SENSE+ (Pin 3) | Positive current sense input | Accepts common-mode voltage up to 40V; supplies current to comparator when >INTVCC - supports high-side RSENSE placement. |
| VFB (Pin 4) | Feedback error amplifier input | Compares output divider voltage to 1.200V reference; regulates VOUT with ±1% accuracy - defines final output setpoint. |
| ITH (Pin 5) | Error amplifier output / compensation node | Controls current limit threshold and loop stability; connects to RC network for OPTI-LOOP tuning - adapts transient response to varied COUT/ESR. |
| RUN (Pin 6) | Enable/shutdown control | 1.2V threshold disables switching; <0.7V forces 1.2μA shutdown - enables system-level power sequencing and UVLO implementation. |
| FREQ (Pin 7) | Frequency programming | Resistor-to-GND sets fSW from 100kHz–3MHz; INTVCC/GND selects fixed 2.25MHz/375kHz - balances efficiency, size, and EMI. |
| PLLIN/SPREAD (Pin 8) | Synchronization & spread spectrum control | External clock input for phase-lock; INTVCC enables ±10% frequency dithering - reduces EMI peak amplitude without altering average fSW. |
| MODE (Pin 9) | Light-load operating mode select | GND = Burst Mode (high efficiency, higher ripple); INTVCC = continuous conduction; 100k-to-INTVCC = pulse-skipping - optimizes trade-off between IQ and noise. |
| INTVCC (Pin 10) | Internal 5.15V LDO output | Powers gate drivers and analog circuitry; requires ≥4.7μF ceramic decoupling - provides stable local supply independent of VBIAS fluctuations. |
| EXTVCC (Pin 11) | External bias input | Bypasses VBIAS LDO when >4.7V; reduces power loss in multi-rail systems - improves overall converter efficiency at high load. |
| VBIAS (Pin 12) | Main bias supply | Accepts 4.5V–40V; powers internal LDO and logic - enables bootstrap operation from VOUT for ultra-low VIN start-up. |
| BG (Pin 13) | Bottom N-MOSFET gate driver | 0V to INTVCC swing; 1.5Ω pull-down resistance - drives low-side switch with fast turn-off for reduced shoot-through risk. |
| BOOST (Pin 14) | Bootstrap supply for top driver | Connects to SW via capacitor and Schottky diode; refreshes floating supply - sustains TG drive during 100% duty cycle operation. |
| TG (Pin 15) | Top N-MOSFET gate driver | Floating output with INTVCC swing superimposed on SW node - enables high-side N-FET use without P-FET inefficiency. |
| SW (Pin 16) | Switch node connection | Drives external inductor; handles high dv/dt transitions - requires tight layout to minimize EMI and ringing. |
| GND (Pin 17) | Power and signal ground | Exposed thermal pad; connects to CIN/COUT negatives and small-signal grounds - mandatory for thermal integrity and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum modulation | ±10% frequency dithering reduces peak conducted/EMI by >10dB - simplifies compliance with CISPR 25 Class 5 in automotive designs. |
| OPTI-LOOP compensation | Single-pole-zero network on ITH pin adapts loop bandwidth to diverse output capacitor types (ceramic/tantalum/electrolytic) - eliminates trial-and-error tuning. |
| Pass-Thru™ 100% duty cycle | Enables seamless VIN-to-VOUT pass-through when VIN ≥ VOUT - eliminates dropout loss in battery-powered systems during high-VIN conditions. |
| AEC-Q100 Grade E qualification | Rated for –40°C to +125°C operation with full automotive reliability testing - suitable for engine bay and ADAS power supplies. |
| Low-IQ sleep mode | 28μA typical VBIAS current with SENSE+ <2.9V - maintains system readiness while minimizing standby drain in always-on ECUs. |
| DCR or RSENSE sensing | Configurable current sense interface eliminates need for power-hungry shunt resistors - improves efficiency in high-current (>10A) boost stages. |
Applications
| Automotive Infotainment Power | Industrial 24V Bus Boost |
|---|---|
|
Use Scenario: Generating stable 12V/5A from vehicle battery (6V–16V) for head unit displays and audio amplifiers during cold-crank. IC Role / Device Role / Timing Role: Synchronous boost controller managing all-N-FET stage with Pass-Thru™ mode to maintain output during low-VIN transients. Use Value: 14μA quiescent current prevents battery drain during vehicle off-state; AEC-Q100 qualification ensures reliability in under-hood environments. |
Use Scenario: Stepping up factory 24V DC bus to 40V for PLC I/O modules requiring higher actuation voltage. IC Role / Device Role / Timing Role: High-efficiency boost controller operating at 500kHz with DCR sensing to minimize heat in enclosed enclosures. Use Value: Spread spectrum reduces EMI emissions below CISPR 11 limits without added filtering; 40V output rating eliminates need for cascaded stages. |
| Telecom Remote Radio Unit | Avionics Power Conditioning |
|
Use Scenario: Converting 48V telecom supply to isolated 28V for RF power amplifiers in remote radio heads with strict thermal constraints. IC Role / Device Role / Timing Role: Phase-lockable boost controller synchronized to system clock to avoid beat frequencies with baseband signals. Use Value: 3MHz max switching frequency enables compact 1.5μH inductors; low-noise Burst Mode minimizes interference with sensitive RF receivers. |
Use Scenario: Providing regulated 28V from aircraft 270V DC distribution bus for flight control sensors requiring ultra-low EMI. IC Role / Device Role / Timing Role: EMI-optimized boost controller using spread spectrum and optimized layout to meet DO-160 Section 20 Level M requirements. Use Value: 1.2μA shutdown current meets avionics zero-power standby mandates; 125°C junction rating supports operation in sealed avionics bays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP9928GQ-P | Fixed 500kHz fSW, no spread spectrum, 25μA IQ, QFN-16 package only | Lacks phase-lock and EMI dithering; lower thermal rating (105°C ambient) | Choose for cost-sensitive non-automotive applications where EMI is managed externally. |
| TPS40210DGQR | Current-mode controller with 100kHz–1MHz range, 3mA IQ, SOIC-8 package | No Pass-Thru™ mode, no DCR sensing, no AEC-Q100 qualification | Use where board space permits larger SOIC and light-load efficiency is secondary to BOM simplicity. |
Compared with MP9928GQ-P and TPS40210DGQR, the LTC7804EMSE#TRPBF delivers superior EMI performance via integrated spread spectrum, automotive-grade reliability, and flexible light-load operation - making it the preferred choice for safety-critical and thermally constrained boost applications.
Availability
LTC7804EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial 24V bus boost converters, and avionics power conditioning requiring stable component supply, AEC-Q100 compliance, and low-quiescent-current operation.
Supply support for LTC7804EMSE#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 industrial, automotive, communications, and aerospace markets with precision power, signal chain, and RF solutions.
The LTC7804 belongs to Analog Devices' Power by Linear™ high-efficiency DC/DC controller family, designed specifically for demanding automotive and industrial applications requiring ultra-low IQ, robust EMI performance, and extended temperature operation.
FAQ
What is the minimum input voltage required for startup of the LTC7804EMSE#TRPBF?
The LTC7804EMSE#TRPBF requires a minimum 4.5V bias supply (VBIAS) for initial startup. Once running and biased from the output rail, it can sustain operation down to 1V input - enabling reliable cold-crank performance in automotive applications where battery voltage dips below 6V.
How does the LTC7804EMSE#TRPBF achieve EMI reduction without external filters?
The LTC7804EMSE#TRPBF integrates spread spectrum frequency modulation (±10% dithering) and phase-lock capability. When PLLIN/SPREAD is tied to INTVCC, it spreads spectral energy across a band, reducing peak radiated/conducted emissions by >10dB - easing compliance with CISPR 25 and DO-160 standards without added filter components.
Can the LTC7804EMSE#TRPBF operate in 100% duty cycle Pass-Thru™ mode, and how is it enabled?
Yes, the LTC7804EMSE#TRPBF supports true 100% duty cycle operation when VIN approaches or exceeds VOUT. This Pass-Thru™ mode activates automatically during light loads or high-input conditions - no external enable signal is required. It eliminates dropout loss and maintains regulation without discontinuous conduction.
What current sensing methods does the LTC7804EMSE#TRPBF support, and how do they differ in design impact?
The LTC7804EMSE#TRPBF supports both discrete RSENSE and inductor DCR sensing. RSENSE offers high accuracy but adds power loss and board area; DCR sensing eliminates the shunt resistor, improving efficiency and thermal performance - especially beneficial in high-current (>6A) applications where heat dissipation is critical.
Is the LTC7804EMSE#TRPBF pin-compatible with other members of the LTC780x family?
No, the LTC7804EMSE#TRPBF is not pin-compatible with earlier LTC7801/LTC7802 controllers due to differences in pin assignment (e.g., MODE, PLLIN/SPREAD, FREQ locations) and functional enhancements like spread spectrum and OPTI-LOOP. Migration requires PCB layout revision and firmware updates to leverage new features.
LTC7804EMSE#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
LTC7804EMSE#TRPBF FAQ
1.How can I place an order for LTC7804EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7804EMSE#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 LTC7804EMSE#TRPBF reliable?
The price and inventory of LTC7804EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7804EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7804EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7804EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7804EMSE#TRPBF?
LTC7804EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7804EMSE#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 LTC7804EMSE#TRPBF?
For technical support, including LTC7804EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7804EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC7804EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7804EMSE#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 LTC7804EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7804EMSE#TRPBF?
All LTC7804EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7804EMSE#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 LTC7804EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC7804EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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