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Analog Devices Inc. LT1158CSW#TRPBF
- Part No.:
- LT1158CSW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1158CSW#TRPBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,764
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Product details
Overview
LT1158CSW#TRPBF from Analog Devices (formerly Linear Technology) is a half-bridge N-channel power MOSFET driver IC designed to synchronously control high-side and low-side N-MOSFETs in totem-pole configurations. It features adaptive non-overlap gate drives, internal charge pump for DC top-side operation, 150ns transition times into 3000pF, 500mA peak output current, and continuous current limit protection with 150mV threshold. It is used in synchronous step-down switching regulators and brushless motor drive systems.
For engineers reviewing the LT1158CSW#TRPBF datasheet, LT1158CSW#TRPBF pinout, LT1158CSW#TRPBF application, or LT1158CSW#TRPBF equivalent, key selection considerations include bootstrap-based high-side drive capability, V+ operating range (5V–30V), fault-retry behavior via ENABLE/FAULT loop, and compatibility with logic-level and standard N-channel MOSFETs in motor control and DC-DC conversion.
Technical Context
The LT1158CSW#TRPBF implements adaptive dead-time control by monitoring gate feedback pins (T GATE FB, B GATE FB) to ensure safe turn-off before turn-on, eliminating external timing components and MOSFET matching requirements. Its internal charge pump (pin 16 → pin 13) sustains top-side gate drive during 100% duty cycle, while regulated gate voltage clamping limits VGS to 14.5V across supply voltages up to 30V.
Current limiting operates in closed-loop mode using SENSE+ and SENSE– inputs, regulating top MOSFET short-circuit current at 150mV (typical), with inhibit activation when VDS exceeds 1.2V. The FAULT output is open-collector and supports automatic shutdown/retry when tied to ENABLE via an RC network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5V to 30V - enables direct use with 12V/24V industrial rails and 5V logic supplies without level shifting. |
| Peak Output Current | 500mA - sufficient to drive multiple parallel N-MOSFETs (e.g., four IRFZ34 devices) with minimal gate resistor dependence. |
| Transition Time (3000pF) | 150ns (typ) - ensures fast switching in PWM applications up to 100kHz with low overlap loss. |
| Current Limit Threshold | 150mV (closed-loop) - sets precise top-side short-circuit current (e.g., 10A with 15mΩ shunt) independent of temperature drift. |
| Gate Drive Voltage Clamp | 14.5V (max) - protects standard N-MOSFETs (e.g., IRFZ34, BVDSS ≥ 60V) from overvoltage stress at high V+. |
| Fault Response | Open-collector FAULT output with auto-retry - allows self-resetting protection without external microcontroller intervention. |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade embedded power stages in motor drives and DC-DC converters. |
Pinout & Package
LT1158CSW#TRPBF uses a 16-lead plastic wide SOIC (SW) package with θJA = 110°C/W, optimized for surface-mount power stage integration and thermal relief in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOST DR (1) | Bootstrap capacitor recharge clamp | Internally regulates boost voltage to 14.5V above T SOURCE - prevents overcharging and enables reliable DC top-side drive. |
| V+ (2,10) | Main and bottom-side supply input | Dual V+ pins reduce IR drop and improve noise immunity for high-current gate drive paths. |
| ENABLE (4) | Global driver enable/disable control | Internal 25μA pull-up enables default operation; pulling low forces both outputs off and reduces supply current to 2mA. |
| FAULT (5) | Open-collector fault indicator | Sinks current when SENSE+–SENSE− > 110mV; supports automatic retry when connected to ENABLE via RC network. |
| INPUT (6) | Logic-level PWM input | TTL/CMOS-compatible with 0.8V/2.0V thresholds and 200mV hysteresis - immune to noise in noisy motor environments. |
| B GATE DR (9) | High-current bottom gate drive output | Delivers 500mA peak to drive gate through optional series resistor - separates drive path from feedback sensing. |
| T GATE DR (15) | High-current top gate drive output | Supplies charge pump current to top MOSFET gate; requires external gate resistor for dV/dt control and oscillation damping. |
| T SOURCE (13) | Top-side driver return reference | Floating ground reference for high-side driver - connects directly to top MOSFET source and bootstrap capacitor low side. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive non-overlap gate drive | Eliminates shoot-through risk without external timing components or matched MOSFETs - simplifies layout and improves reliability in half-bridge inverters. |
| Integrated charge pump | Enables true DC operation of top N-MOSFET without external bootstrap diode or capacitor recharging circuitry - supports 100% duty cycle in buck regulators. |
| Continuous current limit loop | Regulates top MOSFET current at fixed 150mV sense threshold - provides stable short-circuit protection even under varying VDS and temperature. |
| Gate-to-source voltage protection | Clamps VGS to 14.5V max regardless of V+ (5V–30V) - removes need for external Zener clamps and preserves MOSFET gate oxide integrity. |
| Fault output with auto-retry | Open-collector FAULT pin enables self-resetting shutdown via ENABLE feedback - eliminates requirement for external watchdog or MCU supervision. |
Applications
| Motor Control in Power Tools | Synchronous Buck Regulator |
|---|---|
Use Scenario: Brushless DC motor drive in cordless drills with rapid direction reversal and stall detection. IC Role / Device Role / Timing Role: Half-bridge gate driver controlling high-side/low-side N-MOSFETs in 3-phase inverter leg; manages dead time and current limiting per phase. Use Value: Adaptive non-overlap prevents shoot-through during commutation transients; 150mV current limit enables accurate stall detection at 10A with 15mΩ shunt. | Use Scenario: 12V-to-3.3V/5A synchronous buck converter in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Replaces Schottky diode with actively driven low-side N-MOSFET; provides gate drive and current-sense interface for current-mode control. Use Value: Enables >92% efficiency at full load by eliminating diode conduction loss; FAULT-to-PWM feedback forms robust current-limit loop. |
| Three-Phase BLDC Drive | Battery-Powered Logic-Level Drive |
Use Scenario: Sensorless three-phase BLDC motor controller in HVAC blowers with variable speed and soft-start. IC Role / Device Role / Timing Role: Gate driver for all six switches in inverter bridge; coordinates PWM timing and fault propagation across phases. Use Value: Charge pump sustains top-side drive during extended on-times; ENABLE pin allows coordinated phase disable without floating gates. | Use Scenario: 6V battery-powered portable medical pump requiring low-VTH MOSFETs and minimal quiescent current. IC Role / Device Role / Timing Role: Logic-level compatible driver for IRF7470-type MOSFETs; operates down to 4.5V with no performance degradation. Use Value: 500mA drive strength ensures fast turn-on of 30nC-gate MOSFETs at low V+; 2mA shutdown current extends battery life during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge N-MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS21844STRPBF | Higher VBS rating (600V), no integrated current limit; requires external sense amplifier and fault logic. | Targeted at high-voltage AC-DC PFC and inverter stages, not low-voltage current-regulated DC-DC. | Choose IRS21844STRPBF only when operating above 60V or needing higher isolation; LT1158CSW#TRPBF is superior for <30V current-mode buck/motor control. |
| LM5109BMAX/NOPB | Fixed 120ns dead time, no adaptive non-overlap; lacks internal current limit and FAULT-retry functionality. | Designed for fixed-frequency synchronous buck with external current sensing and MCU-based fault handling. | Choose LM5109BMAX/NOPB for cost-sensitive, non-current-limited applications; LT1158CSW#TRPBF delivers integrated protection and simpler system design. |
Compared with IRS21844STRPBF and LM5109BMAX/NOPB, the LT1158CSW#TRPBF uniquely integrates adaptive dead-time control, closed-loop current limiting, and auto-retry fault management - reducing BOM count and enabling robust, self-protecting power stages below 30V.
Availability
LT1158CSW#TRPBF is available at Aetrix Electronics and suitable for synchronous buck regulators, BLDC motor drives, and battery-powered logic-level MOSFET applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1158CSW#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. (ADI) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1158CSW#TRPBF belongs to ADI's legacy Linear Technology power driver product line, engineered specifically for high-efficiency, self-protected N-MOSFET half-bridge control in motor drives and DC-DC converters.
FAQ
What is the maximum operating supply voltage for the LT1158CSW#TRPBF?
The LT1158CSW#TRPBF has an absolute maximum supply voltage rating of 36V on pins 2 and 10 (V+), with recommended operation from 5V to 30V. Exceeding 30V risks violating the 14.5V gate clamp and may trigger overvoltage protection on internal bias circuits. Always observe derating guidelines for thermal management at high V+ and high-frequency switching.
Does the LT1158CSW#TRPBF support 100% duty cycle operation for the high-side MOSFET?
Yes, the LT1158CSW#TRPBF supports true 100% duty cycle top-side operation via its integrated charge pump (pins 16 and 13). Unlike basic bootstrap drivers, it maintains gate drive without requiring periodic low-state refresh - critical for synchronous buck regulators operating near full duty cycle. The charge pump activates automatically when needed and sustains VGS at 14.5V.
How does the current limit function work on the LT1158CSW#TRPBF?
The LT1158CSW#TRPBF implements a closed-loop current limit using SENSE+ (pin 12) and SENSE– (pin 11). When the differential voltage exceeds 150mV (typical), the internal comparator regulates top MOSFET current by modulating gate drive. The limit is active only when pin 11 is >1.2V below V+, preventing false triggering during startup or light loads.
Can the LT1158CSW#TRPBF drive logic-level MOSFETs from a 5V supply?
Yes, the LT1158CSW#TRPBF operates down to 4.5V and delivers full 500mA peak drive current at 5V - making it ideal for driving logic-level N-MOSFETs (e.g., Si2302, IRF7470) in battery-powered systems. Its TTL/CMOS input thresholds (0.8V/2.0V) and gate voltage clamping ensure safe, efficient operation without external level shifters or Zener diodes.
What is the purpose of the B GATE FB and T GATE FB pins on the LT1158CSW#TRPBF?
B GATE FB (pin 8) and T GATE FB (pin 14) provide direct gate-to-source voltage sensing for adaptive non-overlap control. They monitor actual VGS to enforce safe turn-off before turn-on - eliminating shoot-through without fixed dead-time circuits. These pins also supply sustaining current (100μA bottom, charge pump top), ensuring stable gate bias during steady-state conduction.
LT1158CSW#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 5V ~ 30V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- 500mA, 500mA
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 56 V
- Rise / Fall Time (Typ):
- 130ns, 120ns
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1158CSW#TRPBF FAQ
1.How can I place an order for LT1158CSW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1158CSW#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 LT1158CSW#TRPBF reliable?
The price and inventory of LT1158CSW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1158CSW#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1158CSW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1158CSW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1158CSW#TRPBF?
LT1158CSW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1158CSW#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 LT1158CSW#TRPBF?
For technical support, including LT1158CSW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1158CSW#TRPBF requirements.
6.How does Aetrix verify that LT1158CSW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1158CSW#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 LT1158CSW#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1158CSW#TRPBF?
All LT1158CSW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1158CSW#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 LT1158CSW#TRPBF part is unused and in its original packaging.
Return procedure for LT1158CSW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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