My Inquiry
My Account
Analog Devices Inc. LTC7860EMSE#TRPBF
- Part No.:
- LTC7860EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC7860EMSE#TRPBF.pdf
- Description:
- HIGH EFFICIENCY SWITCHING SURGE
- Quantity:
- Payment:
- Shipping:
Inventory:7,304
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7860EMSE#TRPBF from Analog Devices is a high-efficiency switching surge stopper IC that protects downstream loads from input overvoltage transients (e.g., automotive load dump) by regulating output voltage via external P-channel MOSFET control in PROTECTIVE PWM mode. It operates across 3.5V–60V input, delivers adjustable output clamping up to 18V, supports 50kHz–850kHz programmable switching frequency, and features integrated fault timer, soft-start, and overcurrent protection. Used in MIL-STD-1275 and ISO 7637-compliant vehicle power systems.
For engineers reviewing the LTC7860EMSE#TRPBF datasheet, LTC7860EMSE#TRPBF pinout, LTC7860EMSE#TRPBF application, or LTC7860EMSE#TRPBF equivalent, key selection criteria include VIN range (3.5V–60V), VOUT clamp adjustability, 12-lead MSOP thermal performance, PROTECTIVE PWM vs. SWITCH-ON mode behavior, and fault timer programmability with TMR pin.
Technical Context
The LTC7860EMSE#TRPBF implements peak current-mode control with an internal 0.8V reference and transconductance error amplifier (1.8 mS). Its dual-mode operation-SWITCH-ON (100% duty cycle, minimal insertion loss) and PROTECTIVE PWM (regulated buck conversion during surges)-is governed by real-time sensing of VIN–SENSE differential voltage and feedback loop dynamics at VFB/VFBN.
It integrates a programmable fault timer (TMR pin, 30 µA pull-up, 1.29 V gate-off threshold), adjustable soft-start (10 µA SS pull-up current), and gate driver with 8 V (VIN–VCAP) bias LDO. The FREQ pin accepts resistor-programmed or fixed-frequency inputs (350 kHz grounded, 535 kHz floating), and foldback frequency drops to 18% of setpoint when VFB falls below 0.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.5 V to 60 V - Supports automotive battery rails and industrial 48 V systems without external level-shifting. |
| Switching Frequency | 50 kHz to 850 kHz - Programmable via FREQ pin resistor; enables EMI optimization and inductor size trade-offs. |
| Output Clamp Accuracy | ±4.5% over temperature - Ensures reliable load protection during 100 ms+ surges per MIL-STD-1275. |
| Current Limit Threshold | 95 mV ±10% at SENSE - Sets precise overcurrent trip point independent of MOSFET RDS(on). |
| Fault Timer Set Time | 37–50 ms/µF on TMR - Configurable cool-down and retry timing to prevent thermal runaway during sustained faults. |
| Junction Temp Range | –40°C to 125°C - Rated for under-hood automotive and industrial environments (E-grade). |
| Gate Driver Bias | VIN–VCAP = 8.0 V ±0.4 V - Provides stable gate drive for external P-MOSFETs even at low VIN (≥8 V). |
Pinout & Package
Package: 12-lead thermally enhanced MSOP with exposed PGND pad (Pin 13), rated θJA = 40°C/W and θJC = 10°C/W. Exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TMR (1) | Fault timer control node | 30 µA pull-up current charges external capacitor; 1.29 V threshold triggers shutdown; 240 mV restart threshold enables cool-down recovery. |
| FREQ (2) | Oscillator frequency programming | 20 µA current source sets frequency via RFREQ; grounding = 350 kHz, floating = 535 kHz, resistor = 50–850 kHz. |
| SGND (3) | Analog signal ground reference | Isolated small-signal return for VFB, ITH, SS; must connect to PGND at single-point to avoid noise coupling. |
| SS (4) | Soft-start and tracking input | 10 µA internal pull-up charges external capacitor; regulates VFB to SS voltage during ramp-up for controlled VOUT rise. |
| VFB (5) | Feedback sense input | Regulated to 0.800 V ±1.1%; determines output voltage via resistor divider; folds back frequency if <0.4 V. |
| ITH (6) | Error amplifier output & compensation | 0–2.9 V range; sums slope compensation to set peak inductor current; connects to external RC network for loop stability. |
| VFBN (7) | Inverting feedback reference | 0 V threshold; enables high-VIN (>60 V) operation via external transistor-based feedback; disable by tying >2 V. |
| RUN (8) | Enable/disable control | 1.26 V enable threshold; internal 0.4 µA pull-up allows direct connection to 60 V supply; <0.7 V forces micropower shutdown (7 µA). |
| CAP (9) | GATE driver bias supply | Internal LDO output referenced to VIN; requires ≥0.47 µF ceramic cap to VIN for stable 8 V gate drive. |
| SENSE (10) | Current sense input | Differential input (VIN–SENSE); 95 mV threshold sets overcurrent limit; Kelvin routing required for accuracy. |
| VIN (11) | Main power input | Supplies internal circuitry; requires ≥0.1 µF ceramic bypass to PGND; absolute max 65 V. |
| GATE (12) | P-MOSFET gate driver output | Drives external high-side P-channel MOSFET; rail-to-rail swing referenced to CAP; disabled below 3.25 V (VIN–VCAP). |
| PGND (13) | Power ground (exposed pad) | High-current return path for MOSFET source and internal power circuits; must be soldered for thermal performance and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| PROTECTIVE PWM + SWITCH-ON dual-mode operation | Enables zero-insertion-loss conduction during normal operation while delivering active clamping during 100+ ms surges without derating. |
| Programmable fault timer with cool-down recovery | Prevents thermal failure by limiting cumulative time in high-loss PWM mode; supports repeatable fault handling with 4.5% retry duty cycle. |
| Adjustable output voltage clamp (via VFB divider) | Allows precise setting of safe VOUT ceiling (e.g., 18 V) independent of input surge amplitude, critical for MIL-STD-1275 compliance. |
| Integrated gate driver bias LDO (VIN–VCAP) | Eliminates need for external bootstrap or charge-pump circuitry; maintains stable 8 V gate drive across full VIN range ≥8 V. |
| Frequency foldback during short-circuit | Reduces peak current and power dissipation during startup or output faults by scaling switching frequency down to 18% of nominal value. |
| Reverse battery protection support | Enables addition of external PMOS between VIN and input capacitor to block reverse polarity events without extra controller IC. |
Applications
| Automotive Load Dump Protection | Industrial 48 V DC Power Distribution |
|---|---|
Use Scenario: Vehicle electrical system experiences 120 V/400 ms load dump per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: LTC7860EMSE#TRPBF acts as pre-regulator, switching into PROTECTIVE PWM mode to clamp VOUT at 18 V while monitoring fault duration via TMR pin. Use Value: Prevents damage to 24 V-rated ECUs and infotainment modules without oversized input filters or linear regulators. | Use Scenario: Factory automation PLC power rail subjected to 60 V transients from inductive load switching. IC Role / Device Role / Timing Role: LTC7860EMSE#TRPBF operates in SWITCH-ON mode during steady state, then enters PROTECTIVE PWM only during transient events exceeding 48 V. Use Value: Enables compact, high-current (5 A+) front-end protection with <100 mΩ effective insertion resistance in normal operation. |
| MIL-STD-1275 Vehicle Power Compliance | Telecom Rectifier Output Clamping |
Use Scenario: Military ground vehicle power system must survive 100 V/500 ms surges per MIL-STD-1275E. IC Role / Device Role / Timing Role: LTC7860EMSE#TRPBF controls external P-MOSFET to regulate VOUT to 34 V maximum, with TMR pin configured for 100 ms fault window and automatic cool-down restart. Use Value: Meets stringent military surge requirements using standard off-the-shelf components and no custom magnetics. | Use Scenario: -48 V telecom rectifier output experiences positive-going transients due to line disconnection or capacitor bank discharge. IC Role / Device Role / Timing Role: LTC7860EMSE#TRPBF placed post-rectifier to clamp positive excursions above –42 V, using VFBN-based inverting feedback for high-side sensing. Use Value: Adds robust overvoltage protection to legacy telecom infrastructure without redesigning upstream AC/DC stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365IMS#PBF | Linear surge stopper; no inductor required; 3.5 V–60 V input; fixed 5.8 V or adjustable clamp; no PWM mode. | Better suited for low-current (<2 A), space-constrained designs where efficiency is secondary to simplicity. | Select LTC4365IMS#PBF when board area is critical and peak load current ≤1.5 A; LTC7860EMSE#TRPBF preferred for >3 A or high-efficiency requirements. |
| TPS43060RTER | Wide-input buck controller (4.5 V–60 V); no integrated surge timer or clamp-specific logic; requires external overvoltage comparator. | Requires additional ICs and layout effort to replicate PROTECTIVE PWM + fault timer functionality of LTC7860EMSE#TRPBF. | Choose TPS43060RTER only if existing design already uses TI ecosystem and needs flexible topology beyond surge stopper (e.g., synchronous buck with telemetry). |
Compared with LTC4365IMS#PBF, LTC7860EMSE#TRPBF delivers higher output current and lower thermal stress during surges but requires an inductor and more complex layout; versus TPS43060RTER, it provides turnkey surge protection logic and integrated fault management without external supervision circuitry.
Availability
LTC7860EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive power systems, industrial 48 V distribution, and MIL-STD-1275-compliant vehicle electronics requiring stable component supply with extended temperature support.
Supply support for LTC7860EMSE#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, communications, and power management markets.
The LTC7860EMSE#TRPBF belongs to Analog Devices' Power by Linear™ surge protection product line, engineered specifically for high-reliability DC power conditioning in harsh environments including automotive, military, and industrial applications.
FAQ
What is the maximum input voltage rating for the LTC7860EMSE#TRPBF?
The LTC7860EMSE#TRPBF has an absolute maximum input voltage (VIN) rating of 65 V, with guaranteed operation from 3.5 V to 60 V. External components-including the external P-MOSFET and input capacitors-must be rated for higher voltages (e.g., 200 V+) to support extended VIN operation above 60 V, as enabled by the floating-ground feedback architecture in the LTC7860EMSE#TRPBF datasheet.
How does the LTC7860EMSE#TRPBF handle overcurrent faults?
The LTC7860EMSE#TRPBF monitors current via the SENSE pin, triggering overcurrent protection when the VIN–SENSE differential exceeds 95 mV (typical). This limits peak inductor current and regulates maximum output current. Concurrently, the TMR pin initiates its fault timer; if the overcurrent persists beyond the programmed time, the GATE output shuts down until cool-down completes. This dual-layer response prevents thermal damage during sustained faults in the LTC7860EMSE#TRPBF.
Can the LTC7860EMSE#TRPBF be used for reverse battery protection?
Yes-the LTC7860EMSE#TRPBF supports optional reverse battery protection by adding an external PMOS transistor between the input source and the VIN pin. When reverse polarity is applied, the PMOS remains off, blocking current flow. The LTC7860EMSE#TRPBF itself does not integrate reverse-voltage circuitry but provides the necessary control signals and timing to coordinate this protection scheme without additional ICs.
What is the purpose of the VFBN pin on the LTC7860EMSE#TRPBF?
The VFBN pin on the LTC7860EMSE#TRPBF serves as the inverting feedback reference input, enabling high-input-voltage operation (>60 V) via external transistor-based feedback networks. When used with an NPN/PNP pair (e.g., QFB in Figure 1c), it allows accurate output regulation without exposing the VFB pin to high common-mode voltages. For standard ≤60 V applications, VFBN is tied >2 V to disable the inverting amplifier and use conventional resistive feedback in the LTC7860EMSE#TRPBF.
Does the LTC7860EMSE#TRPBF require an external inductor?
Yes-the LTC7860EMSE#TRPBF is a controller IC and requires an external inductor to implement the buck-derived PROTECTIVE PWM mode. During overvoltage events, it operates as a switching regulator, relying on the inductor's energy storage to maintain regulated output. In normal SWITCH-ON mode, the inductor improves input EMI filtering but does not participate in regulation. Typical values range from 4.7 µH to 10 µH, selected based on ripple and transient response requirements in the LTC7860EMSE#TRPBF application circuit.
LTC7860EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC7860EMSE#TRPBF FAQ
1.How can I place an order for LTC7860EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7860EMSE#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 LTC7860EMSE#TRPBF reliable?
The price and inventory of LTC7860EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7860EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7860EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7860EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7860EMSE#TRPBF?
LTC7860EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7860EMSE#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 LTC7860EMSE#TRPBF?
For technical support, including LTC7860EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7860EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC7860EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7860EMSE#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 LTC7860EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7860EMSE#TRPBF?
All LTC7860EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7860EMSE#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 LTC7860EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC7860EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7860EMSE#TRPBF Tags
-
TVS3300DRVR
Texas Instruments
-
TCPP01-M12
STMicroelectronics
-
TPD4S214YFFR
Texas Instruments
-
TPD6S300ARUKR
Texas Instruments
-
TBU-CA085-300-WH
Bourns Inc.
-
TBU-CA065-500-WH
Bourns Inc.
-
TBU-CA040-100-WH
Bourns Inc.
-
TBU-CA085-500-WH
Bourns Inc.
-
TBU-CA085-200-WH
Bourns Inc.
-
NX20P0408UKZ
NXP Semiconductors
-
TBU-CA085-100-WH
Bourns Inc.
-
TBU-CA050-300-WH
Bourns Inc.
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…
