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Analog Devices Inc. LTC1154CS8#TRPBF
- Part No.:
- LTC1154CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1154CS8#TRPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,839
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Product details
Overview
LTC1154CS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower high-side N-channel MOSFET driver with integrated charge pump, overcurrent protection, thermal shutdown interface, and open-drain status reporting. It operates from 4.5V to 18V supply, draws only 8µA standby current, and fully enhances low-RDS(on) FETs without external capacitors - enabling ultralow-drop high-side switching in battery-powered systems like laptop power rails and SCSI termination.
For engineers reviewing the LTC1154CS8#TRPBF datasheet, LTC1154CS8#TRPBF pinout, LTC1154CS8#TRPBF application, or LTC1154CS8#TRPBF equivalent, key selection criteria include its 100mV drain-sense threshold, programmable short-circuit response time via RC delay, active-high IN/active-low EN control logic, and SOIC-8 package compatibility with thermal shutdown via PTC thermistor.
Technical Context
The LTC1154CS8#TRPBF integrates an adaptive on-chip charge pump that generates gate voltage up to 25V above VS (e.g., +18V gate drive at 12V supply), eliminating need for external boost components. Its analog comparator continuously monitors VDS across an external sense resistor against a precision 100mV internal reference.
Protection logic includes latched short-circuit shutdown (5–40µs turn-off), edge-triggered thermal shutdown via SD pin, and controlled gate charge/discharge rates to limit EMI during normal switching - while enabling sub-10µs fast discharge under fault conditions using a dedicated high-current N-channel transistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 18V - supports wide-input industrial and automotive battery systems without external regulation |
| Standby Quiescent Current | 8µA max - enables multi-year operation in always-on battery backup or IoT sensor nodes |
| ON-State Quiescent Current | 85µA typ at 5V - maintains ultra-low power consumption even during active switching |
| Drain Sense Threshold | 100mV ±20mV - sets precise overcurrent trip point independent of supply voltage drift |
| Gate Drive Voltage Boost | +7.5V to +25V above VS - ensures full enhancement of standard logic-level N-MOSFETs (e.g., IRLR024) |
| Turn-ON Time | 30–450µs (VS=5V, CGATE=1nF) - configurable slew rate reduces EMI in noise-sensitive applications |
| Status Output Type | Open-drain with 400µA sink capability - allows wired-OR fault reporting across multiple drivers |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 0°C to 70°C operating temperature range, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Active-high input control | Directly drives internal latch; TTL/CMOS compatible with 1.3V threshold and 100mV hysteresis |
| EN (Pin 2) | Active-low enable | Inhibits IN signal when high; used for bank control or inverted logic interface |
| STATUS (Pin 3) | Fault indicator output | Open-drain output pulled low during overcurrent, thermal shutdown, or latch-off condition |
| GND (Pin 4) | Ground reference | Analog/digital common return; requires Kelvin connection for accurate sense measurement |
| VS (Pin 8) | Power supply input | Provides bias for all circuitry and serves as Kelvin reference for drain-sense comparator |
| DS (Pin 7) | Drain sense input | Compares voltage drop across external sense resistor to internal 100mV reference |
| G (Pin 6) | Gate drive output | Drives MOSFET gate above VS via internal charge pump; high-impedance when off |
| SD (Pin 5) | Shutdown input | Edge-triggered, latching disable - interfaces directly with PTC thermistor for thermal cutoff |
Key Features
| Feature | Design Value |
|---|---|
| No external charge pump capacitors | On-chip adaptive charge pump eliminates BOM cost and layout area for boost caps |
| Programmable overcurrent delay | RC network between DS pin and sense resistor prevents false triggering on lamp/motor inrush |
| Thermal shutdown interface | SD pin accepts direct connection to PTC thermistor - no external comparator or bias needed |
| Controlled gate slew rate | Configurable rise/fall times reduce conducted/radiated EMI in EMC-critical designs |
| Open-drain status reporting | Allows single microcontroller GPIO to monitor fault status across multiple LTC1154CS8#TRPBF units |
Applications
| Laptop Power Switching | SCSI Termination Power |
|---|---|
Use Scenario: Enables/disables +5V or +3.3V rail to notebook peripheral slots during sleep/wake transitions. IC Role / Device Role / Timing Role: High-side switch controller managing power sequencing and isolation with <8µA quiescent draw. Use Value: Extends battery life by eliminating leakage through unpowered peripherals while maintaining fast wake-up response. | Use Scenario: Supplies regulated termination voltage to SCSI bus lines only when host adapter is active. IC Role / Device Role / Timing Role: Precision current-limited high-side switch ensuring stable 2.85V termination under hot-plug conditions. Use Value: Prevents bus contention and signal integrity degradation by isolating termination during idle states. |
| Cellular Phone Battery Management | Industrial Motor Control |
Use Scenario: Controls charging path from USB or wall adapter to Li-ion cell, blocking reverse current during disconnection. IC Role / Device Role / Timing Role: Reverse-battery protected high-side gate driver with undervoltage lockout and status feedback. Use Value: Eliminates need for discrete back-to-back MOSFETs or Schottky diodes, reducing forward voltage drop and heat generation. | Use Scenario: Drives high-side N-MOSFET in half-bridge configuration for stepper or DC motor phase control. IC Role / Device Role / Timing Role: Fault-tolerant gate driver with cycle-by-cycle overcurrent detection and fast shutdown (<40µs). Use Value: Protects MOSFETs from shoot-through and stall-induced thermal runaway without external current-sense amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2051BDR | Fixed 1.5A current limit, no programmable delay, no drain-sense architecture - uses internal current mirror sensing | Lacks precision 100mV threshold and RC-programmable response; suited for fixed-limit load switches, not high-side FET gate driving | Select only if system requires simple ON/OFF control without gate voltage boosting or custom overcurrent timing |
| MAX14914AUG+T | Industrial-grade 60V high-side switch with integrated 2.5Ω FET, 250mA continuous, no external FET support | Monolithic solution - cannot drive external low-RDS(on) MOSFETs; lacks status output and thermal shutdown interface | Choose when board space is constrained and load current ≤250mA; avoid when external FET optimization or PTC-based thermal management is required |
Compared with TPS2051BDR and MAX14914AUG+T, the LTC1154CS8#TRPBF uniquely combines micropower operation, external N-MOSFET drive capability, programmable overcurrent response, and PTC-compatible thermal shutdown - making it irreplaceable for high-efficiency, high-reliability high-side switching where gate voltage boosting and precise fault timing are mandatory.
Availability
LTC1154CS8#TRPBF is available at Aetrix Electronics and suitable for laptop power switching, SCSI termination, and cellular phone battery management requiring stable component supply across long-lifecycle embedded programs.
Supply support for LTC1154CS8#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear products including the LTC1154 family.
The LTC1154 belongs to Linear's high-side power switch IC product line, designed specifically for replacing mechanical relays and P-channel MOSFETs in battery-powered and energy-conscious systems requiring ultralow IQ and robust fault protection.
FAQ
What is the maximum supply voltage rating for the LTC1154CS8#TRPBF?
The absolute maximum supply voltage (VS) for the LTC1154CS8#TRPBF is 22V. Continuous operation is specified from 4.5V to 18V. Exceeding 22V may cause permanent damage. The device's internal charge pump and gate drive circuitry are optimized for reliable performance within this 4.5V–18V operating range, and the 22V absolute maximum provides margin against transient spikes. Always ensure proper input filtering and clamping in systems with noisy or unregulated supplies feeding the LTC1154CS8#TRPBF.
Does the LTC1154CS8#TRPBF require external capacitors for its charge pump?
No, the LTC1154CS8#TRPBF does not require external charge pump capacitors. Its adaptive on-chip charge pump generates boosted gate drive voltage (up to +25V above VS) using internal capacitance. This eliminates two external components, reduces PCB footprint, and improves reliability by removing capacitor aging and placement sensitivity. The datasheet explicitly states "No External Charge Pump Capacitors" as a key feature, and typical application circuits confirm zero external capacitors connected to the G or VS pins for boost functionality.
How does the drain sense function work on the LTC1154CS8#TRPBF?
The drain sense function on the LTC1154CS8#TRPBF compares the voltage drop across an external sense resistor (placed between the MOSFET drain and load) to an internal 100mV reference. When VDS exceeds ~100mV, indicating overcurrent, the input latch resets and the gate is rapidly discharged. The DS pin is high-impedance and must be connected directly or via an RC network to the sense node. This architecture enables precise, supply-independent current limiting - a core capability distinguishing the LTC1154CS8#TRPBF from basic load switches.
Can the LTC1154CS8#TRPBF drive logic-level N-channel MOSFETs?
Yes, the LTC1154CS8#TRPBF is specifically designed to drive logic-level N-channel MOSFETs. Its internal charge pump delivers gate voltage up to 25V above VS (e.g., 17.5V gate drive at 12V supply), ensuring full enhancement of devices like IRLR024 (RDS(on) = 36mΩ @ VGS = 4.5V). The gate drive output (Pin 6) sources sufficient peak current to charge typical 1nF gate capacitances within microseconds, and the datasheet confirms compatibility with standard logic-level FETs in all typical application schematics.
What is the purpose of the STATUS pin on the LTC1154CS8#TRPBF?
The STATUS pin on the LTC1154CS8#TRPBF is an open-drain output that goes low whenever a fault condition occurs - including overcurrent (drain sense trip), thermal shutdown (SD pin activation), or latch-off events. It sinks up to 400µA and requires an external pull-up (typically 51kΩ to 5V) to generate a logic-high signal during normal operation. Multiple LTC1154CS8#TRPBF STATUS pins can be wired together for centralized fault monitoring, enabling a single microcontroller GPIO to detect failures across several high-side switches.
LTC1154CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- High-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 18V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- -
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC1154CS8#TRPBF FAQ
1.How can I place an order for LTC1154CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1154CS8#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 LTC1154CS8#TRPBF reliable?
The price and inventory of LTC1154CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1154CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1154CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1154CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1154CS8#TRPBF?
LTC1154CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1154CS8#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 LTC1154CS8#TRPBF?
For technical support, including LTC1154CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1154CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1154CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1154CS8#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 LTC1154CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1154CS8#TRPBF?
All LTC1154CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1154CS8#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 LTC1154CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1154CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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