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Analog Devices Inc. LTC1255CS8#TRPBF
- Part No.:
- LTC1255CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1255CS8#TRPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
LTC1255CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual high-side N-channel MOSFET driver IC designed for industrial and automotive 24V switching applications. It integrates an internal charge pump to generate gate drive voltage up to 12V above VS, delivers 100µs typical turn-on time at 10V supply with 1nF load, features independent overcurrent sensing with 100mV threshold, and draws only 12µA standby current. It enables robust solenoid and DC motor control in harsh environments.
For engineers reviewing the LTC1255CS8#TRPBF datasheet, LTC1255CS8#TRPBF pinout, LTC1255CS8#TRPBF application, or LTC1255CS8#TRPBF equivalent, key selection criteria include its 9–24V operating range, integrated short-circuit shutdown with adjustable delay, SOIC-8 package compatibility, and ability to fully enhance low-RDS(on) N-channel FETs without external charge pump components.
Technical Context
The LTC1255CS8#TRPBF implements two independent high-side driver channels, each with TTL/CMOS-compatible inputs, adaptive charge pump circuitry, and dedicated drain-sense overcurrent protection. Its internal 100mV reference comparator monitors voltage drop across an external sense resistor to trigger fast gate discharge (≤30µs) during overload.
Each channel includes controlled gate rise/fall timing to minimize EMI, supports logic-level input thresholds (~1.3V with 100mV hysteresis), and maintains operation under transient supply conditions up to 40V for <10ms. The device uses Kelvin-connected VS for accurate current sensing and requires no external capacitors for charge pump functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 9V to 24V - Enables direct use from standard 12V/24V automotive and industrial rails without regulation. |
| Standby Supply Current | 12µA max - Allows always-on operation in battery-powered systems without significant drain. |
| Gate Drive Voltage Above VS | 7.5V to 12V - Sufficient to fully enhance common N-channel MOSFETs (e.g., IRFR024, MTD3055E) with VGS(th) ≤ 4V. |
| Drain Sense Threshold | 100mV ±20mV - Sets precise current limit (e.g., 2.78A with 0.036Ω sense resistor) independent of supply variation. |
| Turn-On Time (10V, 1nF) | 30–300µs - Configurable via external RC network to balance speed vs. EMI in motor/solenoid drive. |
| Short-Circuit Turn-Off Time | 5–30µs - Rapid shutdown protects MOSFETs during fault conditions before thermal damage occurs. |
| Input Logic Compatibility | TTL and CMOS - Interfaces directly with microcontrollers, FPGAs, and discrete logic without level-shifting. |
Pinout & Package
Package: 8-lead SOIC (S8), RoHS-compliant, surface-mount, 150°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | Channel 1 / 2 Input | Active-high CMOS/TTL inputs controlling respective gate outputs; require pull-down during power-up. |
| G1 / G2 | Channel 1 / 2 Gate Output | High-impedance output driving MOSFET gate above VS; clamped to +12V above rail by internal Zener path. |
| DS1 / DS2 | Channel 1 / 2 Drain Sense | High-impedance comparator input referenced to VS; detects >100mV drop across external sense resistor. |
| VS | Power Supply Rail | Kelvin connection point for both power delivery and current-sense reference; must not go below ground. |
| GND | Ground Reference | Analog/digital ground return; series 100Ω resistor recommended if negative transients expected. |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated charge pump | Eliminates need for external flying capacitors or diodes-reduces BOM count and layout area. |
| Independent per-channel overcurrent protection | Enables selective shutdown of failed channel while maintaining operation of second channel. |
| Adjustable short-circuit response delay | RC network on DSx pins prevents false triggering during lamp/motor in-rush (e.g., 100kΩ + 0.1µF = ~10ms delay). |
| Controlled gate slew rates | Minimizes radiated EMI during switching-critical for automotive EMC compliance. |
| Transient-tolerant supply input | Withstands 40V/10ms automotive load-dump events without latch-up or damage. |
Applications
| Solenoid Driver | DC Motor Driver |
|---|---|
Use Scenario: Driving 24V industrial solenoids in valve control systems with frequent on/off cycling. IC Role / Device Role / Timing Role: High-side switch controller providing gate drive, current limiting, and fast fault shutdown. Use Value: Prevents MOSFET destruction during coil de-energization flyback spikes using integrated clamp-aware gate drive and 5µs short-circuit response. | Use Scenario: Bidirectional H-bridge motor control in automotive seat adjusters or HVAC actuators. IC Role / Device Role / Timing Role: Dual high-side driver enabling half-bridge configuration with independent channel protection. Use Value: Enables electronic braking and stall-current detection via per-channel DSx monitoring and coordinated IN1/IN2 sequencing. |
| Lamp Dimmer | Relay Driver |
Use Scenario: PWM-controlled 12V automotive lamp dimming with in-rush current management. IC Role / Device Role / Timing Role: High-side PWM switch with programmable overcurrent delay to accommodate 10× cold-filament surge. Use Value: Uses RC-filtered DSx input to delay shutdown for ~100ms, allowing bulb warm-up while retaining fast fault response post-stabilization. | Use Scenario: Solid-state replacement for electromechanical relays in 24V truck body control modules. IC Role / Device Role / Timing Role: Low-quiescent, high-voltage switch driver with built-in open-load detection capability. Use Value: 12µA standby current extends battery life; optional XNOR-based status feedback provides real-time relay ON/OFF confirmation to MCU. |
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 |
|---|---|---|---|
| TPS2812D | Single-channel, no integrated overcurrent sense; requires external current-sense amplifier and comparator. | Lacks autonomous short-circuit shutdown-needs additional ICs for fault protection. | Choose when cost-sensitive designs can accept added complexity for higher peak drive current (2A vs. LTC1255's 20µA sink). |
| MAX15026BASA+ | Dual high-side driver with integrated current sense but fixed 1.2V threshold (not adjustable); operates up to 28V. | Higher threshold reduces resolution for low-current loads; no user-adjustable delay. | Select for simpler layout where 1.2V sense is sufficient and 28V operation is required beyond LTC1255's 24V max. |
Compared with TPS2812D and MAX15026BASA+, the LTC1255CS8#TRPBF uniquely combines dual-channel integration, 100mV precision current sensing, user-adjustable fault delay, and micropower standby in a single SOIC-8 package-making it optimal for space-constrained, safety-critical automotive and industrial switches requiring autonomous protection.
Availability
LTC1255CS8#TRPBF is available at Aetrix Electronics and suitable for solenoid drivers, DC motor controllers, and automotive lamp dimmers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1255CS8#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 continues to manufacture and support its precision analog and power management portfolio.
The LTC1255CS8#TRPBF belongs to Linear's high-reliability power switch driver family, engineered specifically for ruggedized 12V/24V automotive and industrial systems demanding autonomous fault protection and ultra-low quiescent current.
FAQ
What is the maximum supply voltage rating for the LTC1255CS8#TRPBF?
The LTC1255CS8#TRPBF has an absolute maximum supply voltage of 30V continuous and can withstand transient overvoltages up to 40V for durations less than 10ms-making it suitable for automotive load-dump conditions. Operation above 24V is not recommended for sustained use due to internal regulator limitations and reduced gate drive margin.
Does the LTC1255CS8#TRPBF require external components for charge pump operation?
No, the LTC1255CS8#TRPBF integrates all charge pump capacitance and control circuitry on-die. No external capacitors or diodes are needed to generate gate drive voltage above the supply rail-only a 12V Zener clamp (e.g., MMBZ5242A) across the MOSFET gate-source is recommended for overvoltage protection.
How does the drain sense function work on the LTC1255CS8#TRPBF?
The LTC1255CS8#TRPBF compares voltage at the DS1/DS2 pins against the VS pin. If the differential exceeds 100mV (indicating current > ISENSE = 100mV/RSENSE), the input latch resets and the gate discharges rapidly. The DS pin is high-impedance and may be RC-filtered to add startup delay for in-rush tolerant operation.
Can the LTC1255CS8#TRPBF drive P-channel MOSFETs?
No-the LTC1255CS8#TRPBF is specifically designed for N-channel high-side switching. Its architecture relies on boosting gate voltage above VS to enhance N-channel devices; it does not provide the negative gate drive required for efficient P-channel operation and lacks complementary output stages.
What is the operating temperature range for the LTC1255CS8#TRPBF?
The LTC1255CS8#TRPBF is rated for the commercial temperature range of 0°C to 70°C. For extended industrial or automotive applications, the pin-compatible LTC1255IS8#TRPBF variant supports –40°C to 85°C operation with identical electrical specifications.
LTC1255CS8#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:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 9V ~ 24V
- 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
LTC1255CS8#TRPBF FAQ
1.How can I place an order for LTC1255CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1255CS8#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 LTC1255CS8#TRPBF reliable?
The price and inventory of LTC1255CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1255CS8#TRPBF is usually 5 days.
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LTC1255CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1255CS8#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 LTC1255CS8#TRPBF?
For technical support, including LTC1255CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1255CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1255CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1255CS8#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 LTC1255CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1255CS8#TRPBF?
All LTC1255CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1255CS8#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 LTC1255CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1255CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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