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Analog Devices Inc. LTC1154CS8#PBF
- Part No.:
- LTC1154CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1154CS8#PBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
LTC1154CS8#PBF 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 external N-MOSFETs without external capacitors - enabling ultralow-drop, fault-protected high-side switching in battery-powered systems.
For engineers reviewing the LTC1154CS8#PBF datasheet, LTC1154CS8#PBF pinout, LTC1154CS8#PBF application, or LTC1154CS8#PBF equivalent, key selection criteria include its 100mV drain-sense threshold, programmable short-circuit response time, active-high input with active-low enable, and SOIC-8 package compatibility with thermal PTC interfacing and µP status feedback.
Technical Context
The LTC1154CS8#PBF implements an adaptive on-chip charge pump that generates gate voltage up to VS + 18V (typ.) at 12V supply, enabling full enhancement of low-RDS(on) N-MOSFETs in high-side configurations. Its analog comparator continuously monitors VDS across an external sense resistor against a precision 100mV internal reference.
Protection logic includes edge-triggered shutdown input, latch-resettable overcurrent detection with built-in 10µs delay, and status output that sinks current only during fault conditions (short-circuit, thermal shutdown, or SD assertion). The ENABLE pin provides bank-level control with CMOS-compatible thresholds and high-impedance inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 18V - supports wide-input industrial and automotive battery rails without external regulation. |
| Standby Quiescent Current | 8µA (max) - enables multi-year operation in always-on battery systems like IoT sensors or backup power switches. |
| Drain Sense Threshold | 100mV (typ.), ±25mV tolerance - sets precise overcurrent trip point independent of temperature or supply variation. |
| Gate Drive Voltage Boost | VS + 7.5V (min) at 6V supply - ensures robust N-MOSFET turn-on even with high RDS(on) devices or elevated junction temperatures. |
| Turn-ON Time | 30–450µs (vs. CGATE = 1000pF) - configurable slew rate limits EMI during normal switching while preserving fast fault response. |
| Status Output Type | Open-drain, 400µA sink capability - allows wired-OR fault aggregation across multiple LTC1154CS8#PBF units into a single µP interrupt line. |
| Shutdown Input Sensitivity | Edge-triggered, latched - guarantees immediate gate discharge on transient overtemperature events, even if PTC signal recovers. |
Pinout & Package
Package: 8-Lead Plastic SOIC (S8), RoHS-compliant, 0°C to 70°C operating range. Body dimensions: 4.90mm × 3.91mm × 1.75mm (JEDEC MS-012).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Active-high switch control input | CMOS/TTL-compatible logic input; asserts gate drive when high; resets latch on rising edge. |
| EN (Pin 2) | Active-high enable/disable input | Inhibits IN signal when high; supports synchronized bank control or inverted logic mode. |
| STATUS (Pin 3) | Fault indicator output | Open-drain output pulled low during overcurrent, thermal shutdown, or SD assertion; requires external 51kΩ pull-up. |
| GND (Pin 4) | Ground reference | Analog/digital common return; must be Kelvin-connected for accurate drain sensing. |
| VS (Pin 8) | Power supply input | Provides bias for all circuitry and serves as Kelvin reference for DS pin comparator. |
| DS (Pin 7) | Drain sense input | Compares voltage drop across external sense resistor to 100mV reference; RC delay optional for inrush immunity. |
| G (Pin 6) | MOSFET gate driver output | Drives external N-MOSFET gate above VS via internal charge pump; high-impedance when off. |
| SD (Pin 5) | Active-low shutdown input | Edge-triggered fault input; directly interfaces with PTC thermistor; latches OFF state until reset by IN/EN toggle. |
Key Features
| Feature | Design Value |
|---|---|
| No external charge pump capacitors | Reduces BOM count and PCB area; eliminates capacitor aging, leakage, and layout sensitivity in space-constrained designs. |
| Programmable overcurrent response delay | RC network between DS and sense resistor enables load-specific timing - e.g., 100ms for lamp inrush, microseconds for short-circuit hard shutdown. |
| Thermal shutdown via PTC interface | Direct SD pin connection to PTC thermistor enables system-level thermal protection without µP intervention or ADC monitoring. |
| Open-drain STATUS output | Enables fault aggregation across multiple channels using single pull-up resistor and µP interrupt pin - simplifies diagnostics in multi-load systems. |
| Controlled gate rise/fall times | Minimizes EMI/RFI emissions during normal switching while maintaining sub-40µs fault turn-off - meets Class B EMC requirements out-of-box. |
Applications
| Laptop Power Switching | SCSI Termination Control |
|---|---|
|
Use Scenario: Enabling/disabling 5V or 12V rail to peripheral modules during sleep/wake transitions. IC Role / Device Role / Timing Role: High-side switch controller managing power domain sequencing with µP-driven IN/EN and fault-aware STATUS reporting. Use Value: 8µA standby current extends battery life; built-in short-circuit protection prevents damage during hot-plug events. |
Use Scenario: Dynamically powering SCSI bus termination resistors only when host controller is active. IC Role / Device Role / Timing Role: Precision current-limited high-side driver ensuring stable 2.85V termination voltage under varying bus loading. Use Value: 100mV sense threshold enables accurate 2.7A current limit; STATUS pin signals termination failure to host firmware. |
| Cellular Phone Battery Management | Industrial Motor Control |
|
Use Scenario: Isolating charging circuitry from main battery during fault conditions or thermal events. IC Role / Device Role / Timing Role: Fault-protected high-side switch interfacing with NTC/PTC thermistors and battery protection ICs. Use Value: SD pin accepts direct PTC input; STATUS output triggers charger disable via µP; no external components needed for basic protection. |
Use Scenario: Driving gate of high-side N-MOSFET in half-bridge motor driver for 12V/24V DC motors. IC Role / Device Role / Timing Role: Gate driver with fast (<40µs) short-circuit turn-off and programmable inrush delay for solenoid or stepper coil energization. Use Value: tSC = 5–25µs limits MOSFET energy dissipation during stall; DS pin RC tuning prevents false trips during motor startup. |
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 | Lower supply range (2.7–5.5V), no internal charge pump, fixed 1.5A current limit, no STATUS output. | Suitable only for 3.3V/5V logic-supplied loads; lacks drain-sense programmability and fault reporting. | Select when cost and footprint are critical and system voltage ≤5.5V; not suitable for 12V+ or diagnostic-heavy designs. |
| MAX14914AATM+ | Industrial-grade (–40°C to +125°C), integrated 2.5A MOSFET, SPI interface, diagnostics register, higher IQ (120µA). | Replaces discrete driver + FET + sense + logic; targets PLC I/O modules requiring digital configurability and health monitoring. | Choose for ruggedized, digitally managed outputs where integration outweighs micropower advantage of LTC1154CS8#PBF. |
Compared with TPS2051BDR and MAX14914AATM+, the LTC1154CS8#PBF uniquely balances micropower operation (8µA), wide supply range (4.5–18V), and analog-programmable protection - making it optimal for portable, battery-backed, or thermally sensitive high-side switching where minimal external components and deterministic analog fault response are required.
Availability
LTC1154CS8#PBF is available at Aetrix Electronics and suitable for laptop power switching, SCSI termination control, cellular phone battery management, and industrial motor control requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LTC1154CS8#PBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1154 product line was designed specifically for micropower, fault-protected high-side switching in portable and battery-operated systems - emphasizing ultra-low IQ, integrated protection, and minimal external component count.
FAQ
What is the maximum supply voltage rating for the LTC1154CS8#PBF?
The absolute maximum supply voltage for the LTC1154CS8#PBF is 22V. Continuous operation is specified from 4.5V to 18V. Exceeding 22V may cause permanent damage. The device's internal charge pump and protection circuitry are optimized for reliable performance within this 4.5V–18V operating window, as confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet.
Does the LTC1154CS8#PBF require external capacitors for its charge pump function?
No, the LTC1154CS8#PBF does not require external charge pump capacitors. Its adaptive on-chip charge pump generates boosted gate voltage (up to VS + 18V) using internal capacitance. This eliminates external components, reduces PCB area, and avoids reliability concerns associated with ceramic capacitor aging or ESR drift - a key differentiator explicitly stated in the Features and Applications sections of the LTC1154 datasheet.
How does the drain sense (DS) pin of the LTC1154CS8#PBF detect overcurrent conditions?
The DS pin compares the voltage drop across an external sense resistor (placed between MOSFET source and ground) to an internal 100mV reference. When the sensed voltage exceeds this threshold, the input latch resets and the gate is rapidly discharged. The DS pin supports optional RC filtering to delay response for inrush currents - a design detail validated in Figures F01–F05 and Applications Information section of the LTC1154 datasheet.
Can the LTC1154CS8#PBF interface directly with a PTC thermistor for thermal shutdown?
Yes, the LTC1154CS8#PBF SD (shutdown) pin is explicitly designed for direct connection to a PTC thermistor, as shown in Typical Application TA03 and TA06. When the PTC heats up and its resistance rises sharply, it pulls SD below its 0.8V low-threshold, triggering edge-sensitive, latched shutdown. This interface requires no additional circuitry and is documented in Pin Functions and Applications Information sections of the datasheet.
What is the purpose of the STATUS pin on the LTC1154CS8#PBF, and how should it be used?
The STATUS pin is an open-drain output that sinks current only during fault conditions (overcurrent, thermal shutdown, or SD assertion). It must be pulled up externally - typically with a 51kΩ resistor to 5V - and can be wire-OR'd with other LTC1154CS8#PBF units. This enables centralized fault monitoring without additional logic, as confirmed in Pin Functions (Page 6), Truth Table (Page 7), and Typical Applications TA01–TA13.
LTC1154CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC1154CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1154CS8#PBF 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#PBF reliable?
The price and inventory of LTC1154CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1154CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1154CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1154CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1154CS8#PBF?
LTC1154CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1154CS8#PBF 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#PBF?
For technical support, including LTC1154CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1154CS8#PBF requirements.
6.How does Aetrix verify that LTC1154CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1154CS8#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC1154CS8#PBF?
All LTC1154CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1154CS8#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC1154CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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