My Inquiry
My Account
Analog Devices Inc. LTC7803HMSE#TRPBF
- Part No.:
- LTC7803HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC7803HMSE#TRPBF.pdf
- Description:
- LOW IQ SYNCHRONOUS BUCK CONTROLL
- Quantity:
- Payment:
- Shipping:
Inventory:4,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7803HMSE#TRPBF from Analog Devices is a high-performance, 100% duty cycle capable, synchronous step-down DC/DC controller driving all-N-channel MOSFET stages. It operates from 4.5V to 40V input, delivers up to 40V output, achieves 12µA no-load quiescent current, and supports spread spectrum operation for EMI reduction - deployed in automotive infotainment power rails and industrial 24V-to-3.3V point-of-load conversion.
For engineers reviewing the LTC7803HMSE#TRPBF datasheet, LTC7803HMSE#TRPBF pinout, LTC7803HMSE#TRPBF application, or LTC7803HMSE#TRPBF equivalent, key selection criteria include its 40V input rating, 12µA IQ, 3MHz programmable switching frequency, AEC-Q100 H-grade qualification (–40°C to 150°C), and MSOP-16 thermally enhanced package with exposed GND pad.
Technical Context
The LTC7803HMSE#TRPBF implements a constant-frequency peak current mode architecture with OPTI-LOOP compensation, enabling stable transient response across wide output capacitance and ESR ranges. Its dual-mode gate drivers (TG/BG) support 100% duty cycle via internal charge pump, eliminating dropout at low VIN/VOUT ratios.
Spread spectrum dithering is enabled by tying PLLIN/SPREAD to INTVCC, reducing peak conducted/radiated noise without external components. Light-load behavior is configurable via MODE pin: Burst Mode (12µA IQ), pulse-skipping, or forced continuous conduction - each with distinct efficiency vs. ripple trade-offs confirmed in Figure G01–G03.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V - supports direct connection to 24V/36V industrial and automotive battery rails without pre-regulation. |
| No-Load Quiescent Current | 12µA at 14VIN → 3.3VOUT - enables multi-day runtime in always-on battery-powered systems. |
| Switching Frequency | Programmable 100kHz–3MHz (via FREQ pin resistor) - allows optimization of size (high-freq) vs. efficiency (low-freq) in compact layouts. |
| Output Voltage Range | 0.8V to 40V - supports both low-voltage logic rails and high-voltage analog subsystems from single controller. |
| Current Sensing | RSENSE or DCR - enables flexible, accurate inductor current monitoring with minimal BOM cost or board area. |
| Thermal Rating | –40°C to +150°C junction (H-grade) - qualified per AEC-Q100 for under-hood automotive applications. |
| Package | 16-pin MSOP with exposed thermal pad - provides θJA = 40°C/W for reliable high-current operation without heatsink. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE), 3mm × 4.9mm, exposed GND pad (Pin 17) requiring PCB soldering for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TRACK/SS (Pin 1) | Soft-start & tracking input | Internal 12.5µA pull-up charges external capacitor; sets linear VOUT ramp time (0.65ms/10nF) or enables supply tracking. |
| SENSE+ / SENSE– (Pins 2,3) | Differential current sense inputs | Measure voltage across RSENSE or DCR; trip threshold scales with ITH voltage (45–55mV typ) for precise overcurrent protection. |
| VFB (Pin 4) | Error amplifier feedback input | Regulates output to 0.800V reference; external resistor divider sets VOUT with ±1.5% accuracy over temperature. |
| ITH (Pin 5) | Error amplifier output & compensation node | Controls peak inductor current; connects to RC/CC network for loop stability across load/capacitance variations. |
| RUN (Pin 6) | Enable/shutdown control | 1.2V threshold enables regulation; <0.7V forces 1.2µA shutdown - usable as UVLO with external resistor divider off VIN. |
| FREQ (Pin 7) | VCO frequency programming | GND = 375kHz, INTVCC = 2.25MHz, resistor-to-GND = 100kHz–3MHz - enables EMI tuning without changing layout. |
| PLLIN/SPREAD (Pin 8) | Sync input / spread spectrum select | Tie to INTVCC for EMI-reducing dithering; apply external clock for phase-locking to system master clock. |
| MODE (Pin 9) | Light-load operation mode select | GND = Burst Mode (12µA IQ), INTVCC = forced CCM, 100kΩ-to-INTVCC = pulse-skipping - user-selectable efficiency/ripple balance. |
| INTVCC (Pin 10) | Internal 5.15V LDO output | Powers gate drivers and control logic; requires ≥4.7µF ceramic decoupling to GND for stability and noise immunity. |
| EXTVCC (Pin 11) | External bias input for INTVCC LDO | Enables high-efficiency bypass of VIN LDO when >4.7V applied - reduces total input current in multi-rail systems. |
| VIN (Pin 12) | Main input supply | Bias source for internal circuits when EXTVCC not used; requires local ceramic bypass to GND near pin. |
| BG (Pin 13) | Bottom N-MOSFET gate driver | Drives synchronous rectifier from GND to INTVCC; 1.5Ω pull-down ensures fast turn-off and prevents shoot-through. |
| BOOST (Pin 14) | Bootstrap supply for top driver | Charged via external Schottky diode from INTVCC; supports 100% duty cycle via integrated charge pump during dropout. |
| TG (Pin 15) | Top N-MOSFET gate driver | Floating driver with INTVCC swing superimposed on SW node; 3Ω pull-up enables fast turn-on of high-side switch. |
| SW (Pin 16) | Switch node connection | Connects to inductor and BOOST capacitor; high dv/dt node requiring tight layout and ground plane separation. |
| GND (Pin 17) | Power & signal ground | Exposed thermal pad must be soldered to PCB copper pour; serves as return for CIN, COUT, and all small-signal references. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Capability | Integrated charge pump maintains TG drive during VIN ≈ VOUT dropout - eliminates need for external boost circuitry in wide-input applications. |
| Spread Spectrum Operation | Reduces peak EMI by >10dB without external filters - simplifies compliance with CISPR 25 Class 5 in automotive designs. |
| OPTI-LOOP Compensation | Allows single compensation network to stabilize loops across 10× variation in output capacitance and ESR - cuts design iteration time. |
| AEC-Q100 Qualified (H-grade) | Rated for –40°C to +150°C junction operation with full parametric validation - meets reliability requirements for engine control and ADAS modules. |
| Selectably Efficient Light-Load Modes | Burst Mode (12µA IQ), pulse-skipping, or forced CCM - lets designers match efficiency, output ripple, and EMI profile to exact system needs. |
Applications
| Automotive Infotainment Power | Industrial 24V Point-of-Load |
|---|---|
|
Use Scenario: Powering 3.3V/5V logic rails in head units and digital clusters from 9V–16V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary synchronous step-down controller managing high-current buck conversion with dynamic load steps. Use Value: 12µA IQ extends backup memory retention during ignition-off; spread spectrum meets strict CISPR 25 emissions limits. |
Use Scenario: Generating 12V/5V supplies for PLC I/O modules and motor drives operating from unregulated 24V factory bus. IC Role / Device Role / Timing Role: High-efficiency, wide-input controller enabling single-stage conversion without pre-regulator. Use Value: 40V max input withstands 36V transients; 150°C rating supports operation in sealed enclosures without forced air cooling. |
| Military Avionics DC-DC | Telecom Base Station Bias |
|
Use Scenario: Providing isolated 3.3V/1.8V rails for FPGA and ADCs in airborne radar systems with MIL-STD-704 input compliance. IC Role / Device Role / Timing Role: Radiation-tolerant (by design) controller supporting high-reliability, long-lifetime power conversion. Use Value: AEC-Q100 H-grade qualification correlates with extended lifetime at elevated temperature; 100% duty cycle handles brownouts. |
Use Scenario: Generating bias voltages for RF power amplifiers and optical transceivers in 48V telecom infrastructure equipment. IC Role / Device Role / Timing Role: High-frequency (up to 3MHz) controller enabling compact magnetics and reduced board footprint. Use Value: Programmable frequency avoids sensitive bands (e.g., 2.4GHz ISM); RSENSE/DCR sensing supports precision current limiting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7801IMSE#TRPBF | Lower max input (38V), no spread spectrum, 20µA IQ, same MSOP-16 package | Targeted at cost-sensitive industrial apps where EMI is less critical and 150°C rating not required | Choose when spread spectrum and ultra-low IQ are unnecessary and budget constraints dominate. |
| MP2918GL-Z | Monolithic 6A buck (not controller), 36V max input, 25µA IQ, QFN-16, no AEC-Q100 | Intended for lower-current, space-constrained designs where integrated FETs simplify layout | Choose only for ≤6A loads where integration outweighs flexibility; not suitable for automotive qualification or >10A designs. |
Compared with LTC7801IMSE#TRPBF and MP2918GL-Z, the LTC7803HMSE#TRPBF uniquely combines AEC-Q100 H-grade qualification, 12µA IQ, spread spectrum, and 100% duty cycle - making it the sole option for high-reliability, low-noise, wide-input automotive and industrial controllers requiring external high-current FETs.
Availability
LTC7803HMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, military avionics, and telecom base station power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LTC7803HMSE#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, communications, and power management markets since 1965.
The LTC7803HMSE#TRPBF belongs to Analog Devices' Power by Linear™ controller family, engineered specifically for high-efficiency, wide-input, low-IQ synchronous buck conversion in harsh environments - with emphasis on automotive, industrial, and aerospace reliability.
FAQ
What is the maximum input voltage rating for the LTC7803HMSE#TRPBF?
The LTC7803HMSE#TRPBF has an absolute maximum input voltage rating of 40V on the VIN pin, with guaranteed operation from 4.5V to 40V. This allows direct interface with 24V and 36V industrial and automotive battery systems, including transient conditions up to 40V without external clamping.
Does the LTC7803HMSE#TRPBF support 100% duty cycle operation, and how is it implemented?
Yes, the LTC7803HMSE#TRPBF supports true 100% duty cycle operation via an integrated charge pump that sustains TG gate drive during dropout conditions. When VIN approaches VOUT, the internal charge pump maintains BOOST voltage above SW, enabling continuous top-FET conduction - confirmed in the datasheet's "Boost Supply and Dropout" section.
How does spread spectrum operation reduce EMI in the LTC7803HMSE#TRPBF?
The LTC7803HMSE#TRPBF reduces peak radiated and conducted EMI by modulating its switching frequency ±10% around the nominal value when PLLIN/SPREAD is tied to INTVCC. This dithering spreads energy across a wider bandwidth, lowering spectral peaks by >10dB - verified in typical performance plots G25 and application note AN142.
What is the significance of the H-grade temperature rating for the LTC7803HMSE#TRPBF?
The H-grade designation means the LTC7803HMSE#TRPBF is fully specified and tested over –40°C to +150°C junction temperature, and qualified per AEC-Q100 for automotive use. This enables deployment in under-hood applications such as engine control units and ADAS sensors where ambient temperatures exceed 125°C.
Can the LTC7803HMSE#TRPBF be synchronized to an external clock, and which pin controls this?
Yes, the LTC7803HMSE#TRPBF can be synchronized to an external clock applied to the PLLIN/SPREAD pin (Pin 8). When an external clock is present, the internal phase-locked loop aligns the rising edge of the TG signal to the external clock's rising edge - enabling deterministic timing in multi-rail systems and reducing beat frequencies.
LTC7803HMSE#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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- 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:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Phase Control
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC7803HMSE#TRPBF FAQ
1.How can I place an order for LTC7803HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7803HMSE#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 LTC7803HMSE#TRPBF reliable?
The price and inventory of LTC7803HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7803HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7803HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7803HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7803HMSE#TRPBF?
LTC7803HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7803HMSE#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 LTC7803HMSE#TRPBF?
For technical support, including LTC7803HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7803HMSE#TRPBF requirements.
6.How does Aetrix verify that LTC7803HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7803HMSE#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 LTC7803HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7803HMSE#TRPBF?
All LTC7803HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7803HMSE#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 LTC7803HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC7803HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7803HMSE#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…
