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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

Analog Devices Inc. LTC1153CS8#TRPBF

Name: LTC1153CS8#TRPBF
Brand: Analog Devices Inc.
SKU: LTC1153CS8#TRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC1153CS8#TRPBF

Manufacturer:: Analog Devices Inc.

Category:: Power Management - Specialized

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LTC1153CS8#TRPBF.pdf

Description:: IC ELECTR CIRCUIT BREAKER 8-SOIC

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Product details

Overview

LTC1153CS8#TRPBF from Analog Devices (formerly Linear Technology) is an auto-reset electronic circuit breaker IC that drives external N-channel MOSFETs to protect sensitive loads from over-current, thermal, and short-circuit faults. It features programmable trip current (1mA–>20A), trip delay (15µs–>100ms), and auto-reset time (1ms–>10s), operates from 4.5V–18V, and draws only 8µA quiescent current in standby mode - used in SCSI termination power, battery short-circuit protection, and DC motor stall protection.

For engineers reviewing the LTC1153CS8#TRPBF datasheet, LTC1153CS8#TRPBF pinout, LTC1153CS8#TRPBF application, or LTC1153CS8#TRPBF equivalent, key selection considerations include its 100mV drain-sense threshold voltage, gate drive capability above VS (up to +25V), open-drain status output, thermal shutdown interface via PTC, and SOIC-8 package compatibility with surface-mount assembly.

Technical Context

The LTC1153CS8#TRPBF integrates a charge-pump-based gate driver that generates gate voltages up to 25V above VS without external capacitors, enabling robust turn-on of low-R_DS(ON) N-MOSFETs. Its analog comparator monitors V_DS across an external sense resistor against a precision 100mV internal reference.

Protection logic includes TTL/CMOS-compatible input and shutdown pins, a timing capacitor-controlled auto-reset cycle, and fast fault response (<25µs minimum trip delay). The device maintains continuous gate control during operation and supports thermal trip via external PTC thermistor connected to the SHUTDOWN pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5V to 18V - powers internal regulators, gate driver, and sensing; absolute max 22V.
Drain Sense Threshold	100mV (typ) - sets trip current as I_TRIP = 100mV / R_SENSE; enables precise current limiting down to 1mA with 100Ω sense resistor.
Quiescent Current (Standby)	8µA (typ) - enables always-on protection in battery-powered systems without significant drain.
Gate Drive Voltage Above VS	+7.0V (typ at VS=5V), +18V (typ at VS=12V) - ensures full enhancement of logic-level and standard N-MOSFETs.
Status Output	Open-drain, 0.4V max low at 400µA - directly interfaces to µP interrupt or pull-up logic supply for fault reporting.
Operating Temperature	0°C to 70°C - commercial-grade rating suitable for industrial and embedded power rail applications.
Package	8-pin SOIC (S8) - surface-mount, 130°C/W junction-to-ambient thermal resistance, RoHS-compliant.

Pinout & Package

Package: 8-lead plastic SOIC (S8), 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Active-high enable input	Starts gate drive and protection circuitry; CMOS-compatible, 1.3V threshold with hysteresis.
2 (CT)	Auto-reset timing capacitor node	Charged by 4.2µA current to set reset period; voltage sensed at ~2.5V to trigger retry.
3 (STATUS)	Open-drain fault indicator	Pulled low when tripped; requires external pull-up (e.g., 51kΩ to logic supply) for µP monitoring.
4 (GND)	Analog/digital ground reference	Common return for sense resistor, logic, and charge pump; Kelvin connection to sense resistor top.
5 (VS)	Power supply input	Provides bias for all circuitry and serves as Kelvin reference for drain-sense comparator.
6 (DS)	Drain sense input	Compares voltage drop across external R_SENSE to 100mV reference; high-impedance CMOS input.
7 (G)	MOSFET gate driver output	Drives gate above VS during ON; discharges gate rapidly during fault; no external components needed.
8 (SHUTDOWN)	Thermal/fault override input	Active-high CMOS input; connects to PTC thermistor to disable breaker on overtemperature.

Key Features

Feature	Design Value
No external charge pump capacitors	On-chip adaptive charge pump eliminates need for external flying caps - reduces BOM count and PCB area.
Programmable trip delay (15µs–>100ms)	Configurable via RC network between DS and R_SENSE - prevents false trips during inrush while ensuring fast short-circuit response.
Thermal trip with PTC thermistor	Direct interface to PTC on SHUTDOWN pin enables system-level temperature protection without extra comparators or ADCs.
8µA standby IQ	Enables permanent connection to battery rails in portable equipment - extends runtime during sleep modes.
Drives low R_DS(ON) N-MOSFETs	Gate drive up to +25V above VS ensures full enhancement of cost-effective discrete MOSFETs (e.g., IRLR024, IRFZ34).

Applications

SCSI Termination Power Protection	Battery Short-Circuit Protection
Use Scenario: Protecting 5V SCSI bus termination resistors from sustained over-current due to connector shorts or hot-plug transients. IC Role / Device Role / Timing Role: Acts as intelligent power switch controller; senses current via 0.02Ω sense resistor and interrupts within 20µs. Use Value: Prevents damage to termination network and host controller while enabling automatic recovery after fault removal - no manual reset required.	Use Scenario: Safeguarding Li-ion battery packs during accidental short-circuit events (e.g., tool contact, dropped device). IC Role / Device Role / Timing Role: Monitors discharge path current; trips at 2A (R_SENSE = 50mΩ) with <100ms delay to tolerate brief surges. Use Value: Limits fault energy to safe levels (<1J), avoids thermal runaway, and preserves cell integrity through auto-reset cycling until short is cleared.
DC Motor Stall Protection	Sensitive System Power Interrupt
Use Scenario: Detecting stalled condition in 12V brushed DC motors (e.g., robotics, actuators) where current rises to >5× rated value. IC Role / Device Role / Timing Role: Senses motor phase current via inline shunt; initiates trip after programmable 10ms delay to ignore startup surge. Use Value: Prevents MOSFET destruction and motor winding burnout; auto-retry allows graceful recovery if stall is temporary (e.g., jammed gear).	Use Scenario: Isolating critical subsystems (e.g., FPGA configuration memory, sensor front-end) during brown-out or over-current events. IC Role / Device Role / Timing Role: Functions as programmable power-gate controller; status output signals fault to system supervisor MCU. Use Value: Enables deterministic power sequencing and fault logging; 8µA standby draw avoids loading backup power sources.

SCSI Termination Power Protection

Battery Short-Circuit Protection

Use Scenario: Protecting 5V SCSI bus termination resistors from sustained over-current due to connector shorts or hot-plug transients.

IC Role / Device Role / Timing Role: Acts as intelligent power switch controller; senses current via 0.02Ω sense resistor and interrupts within 20µs.

Use Value: Prevents damage to termination network and host controller while enabling automatic recovery after fault removal - no manual reset required.

Use Scenario: Safeguarding Li-ion battery packs during accidental short-circuit events (e.g., tool contact, dropped device).

IC Role / Device Role / Timing Role: Monitors discharge path current; trips at 2A (R_SENSE = 50mΩ) with <100ms delay to tolerate brief surges.

Use Value: Limits fault energy to safe levels (<1J), avoids thermal runaway, and preserves cell integrity through auto-reset cycling until short is cleared.

DC Motor Stall Protection

Sensitive System Power Interrupt

Use Scenario: Detecting stalled condition in 12V brushed DC motors (e.g., robotics, actuators) where current rises to >5× rated value.

IC Role / Device Role / Timing Role: Senses motor phase current via inline shunt; initiates trip after programmable 10ms delay to ignore startup surge.

Use Value: Prevents MOSFET destruction and motor winding burnout; auto-retry allows graceful recovery if stall is temporary (e.g., jammed gear).

Use Scenario: Isolating critical subsystems (e.g., FPGA configuration memory, sensor front-end) during brown-out or over-current events.

IC Role / Device Role / Timing Role: Functions as programmable power-gate controller; status output signals fault to system supervisor MCU.

Use Value: Enables deterministic power sequencing and fault logging; 8µA standby draw avoids loading backup power sources.

Equivalent & Alternatives

The following parts are listed as comparable options for similar electronic circuit breaker applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX1605ESA+	Fixed 1.25A trip current; no programmable auto-reset; 28V max supply; 16-pin SOIC package.	Limited flexibility for variable load profiles; lacks thermal shutdown input; suited for fixed-threshold, space-constrained designs.	Select when simplicity and known fixed current limit outweigh need for wide-range programmability.
TPL7407LPW	7-channel low-side driver with integrated 500mA current limit per channel; no auto-reset; 40V max; open-drain outputs.	Designed for driving multiple solenoids/relays; not a single-channel high-power breaker; no gate drive above VS.	Choose for multi-load digital-output protection where individual channel limiting suffices and MOSFET gate drive is unnecessary.

Compared with MAX1605ESA+ and TPL7407LPW, the LTC1153CS8#TRPBF uniquely combines wide-range programmability (trip current, delay, reset time), integrated high-side gate drive, thermal shutdown interface, and ultra-low standby current - making it optimal for adaptive, high-reliability power rail protection where load characteristics vary significantly.

Availability

LTC1153CS8#TRPBF is available at Aetrix Electronics and suitable for SCSI termination power protection, battery short-circuit protection, and DC motor stall protection requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LTC1153CS8#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 LTC1153 family.

The LTC1153CS8#TRPBF belongs to Linear's precision power protection IC product line, designed specifically for intelligent, self-resetting over-current protection in industrial, telecom, and embedded systems where reliability, low power, and design flexibility are critical.

FAQ

What is the minimum trip delay achievable with LTC1153CS8#TRPBF?

The LTC1153CS8#TRPBF guarantees a minimum trip delay of 5µs (typical) under VS = 5V and CGATE = 1000pF conditions. This built-in speed ensures rapid response to hard short circuits while the 10µs typical internal delay masks benign transients. Actual trip time depends on external R_SENSE value and DS pin filtering but remains below 25µs across full operating range.

Can LTC1153CS8#TRPBF drive a P-channel MOSFET instead of an N-channel device?

No - the LTC1153CS8#TRPBF is specifically architected for N-channel high-side switching. Its gate driver produces voltage *above* VS to enhance N-MOSFETs; it lacks the level-shifting or negative-voltage generation needed for P-MOSFET source-follower configurations. Using it with a P-MOSFET would result in incomplete turn-on and excessive conduction loss.

How does the shutdown pin interface with a PTC thermistor in LTC1153CS8#TRPBF?

In the LTC1153CS8#TRPBF, the SHUTDOWN pin is a CMOS input with 0.8V/2.0V logic thresholds. A PTC thermistor is wired in series between VS and SHUTDOWN; at normal temperature, PTC resistance is low (~100Ω), pulling SHUTDOWN high to enable operation. At overtemperature, resistance jumps to >10kΩ, dropping SHUTDOWN below 0.8V to force immediate latch-off - providing fail-safe thermal protection independent of current sensing.

What is the maximum gate capacitance the LTC1153CS8#TRPBF can reliably drive?

The LTC1153CS8#TRPBF is characterized with CGATE = 1000pF in timing specifications (e.g., tON, tOFF). While not explicitly rated beyond this, its gate driver delivers sufficient peak current to charge typical power MOSFETs with Qg ≤ 20nC (e.g., IRLR024, Qg = 11nC) within specified turn-on times. For larger devices (Qg > 30nC), external gate drivers are recommended to maintain timing integrity.

Does LTC1153CS8#TRPBF require decoupling capacitors on the VS pin?

Yes - a minimum 1µF ceramic capacitor placed close to the VS and GND pins is required for stable operation. This suppresses supply transients induced by gate switching and ensures the internal voltage regulators maintain clean bias. In current-limited supply applications, a larger bulk capacitor (e.g., 47µF) is added upstream to prevent VS droop below 3.5V during fault conditions - a requirement explicitly stated in the LTC1153CS8#TRPBF datasheet.

LTC1153CS8#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

Applications:: Overvoltage Protection, Circuit Breaker

Current - Supply:: 180µA

Voltage - Supply:: 4.5V ~ 18V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SO

LTC1153CS8#TRPBF FAQ

1.How can I place an order for LTC1153CS8#TRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC1153CS8#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 LTC1153CS8#TRPBF reliable?

The price and inventory of LTC1153CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1153CS8#TRPBF is usually 5 days.

3.What payment methods are accepted for LTC1153CS8#TRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1153CS8#TRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC1153CS8#TRPBF?

LTC1153CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC1153CS8#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 LTC1153CS8#TRPBF?

For technical support, including LTC1153CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1153CS8#TRPBF requirements.

6.How does Aetrix verify that LTC1153CS8#TRPBF is sourced from the original manufacturer or authorized distributors?

All LTC1153CS8#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 LTC1153CS8#TRPBF meets industry standards.

7.What is the process for return or replacement of LTC1153CS8#TRPBF?

All LTC1153CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1153CS8#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 LTC1153CS8#TRPBF part is unused and in its original packaging.

Return procedure for LTC1153CS8#TRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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