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Analog Devices Inc. LT1158CSW#PBF
- Part No.:
- LT1158CSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1158CSW#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:343
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Product details
Overview
LT1158CSW#PBF 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 110mV fault threshold. It is used in synchronous step-down regulators and motor control systems requiring shoot-through immunity.
For engineers reviewing the LT1158CSW#PBF datasheet, LT1158CSW#PBF pinout, LT1158CSW#PBF application, or LT1158CSW#PBF equivalent, key selection considerations include bootstrap-capable high-side drive up to 30V supply, TTL/CMOS-compatible input logic, fault output feedback for auto-shutdown/retry, and gate voltage clamping at 14.5V - all critical for robust motor and switching regulator designs.
Technical Context
The LT1158CSW#PBF implements dual independent gate drivers with separate gate drive (DR) and gate feedback (FB) pins per side, enabling precise VGS monitoring and DC sustaining current delivery (100μA bottom, charge-pump-fed top). Its adaptive non-overlap logic prevents shoot-through by enforcing turn-off-before-turn-on sequencing based on real-time gate voltage thresholds (1.75V for top, 1.5V for bottom).
It integrates a regulated boost driver (pin 1) that clamps bootstrap voltage to 14.5V above top-source potential, and a continuous current-limit loop that regulates top-MOSFET short-circuit current by holding VSENSE+–VSENSE− at 150mV during faults. The FAULT output is open-collector and supports automatic retry via enable capacitor recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5V to 30V - enables direct compatibility with 5V logic and 24V industrial rails 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 - ensures fast switching in PWM applications up to 100kHz while maintaining shoot-through margin. |
| Fault Threshold | 110mV (conduction), 150mV (regulated limit) - sets precise overcurrent trip point across shunt resistors like 0.015Ω for ~7.3A limit. |
| Top Gate Drive Voltage | Clamped at 14.5V - protects standard N-MOSFETs (e.g., VGS(max) = 20V) from gate oxide stress under high-V+ conditions. |
| Input Threshold | 0.8V to 2.0V with 200mV hysteresis - guarantees noise-immune TTL/CMOS compatibility across temperature (–40°C to 70°C). |
| Charge Pump Output | 9V to 47V depending on V+ - sustains top-gate bias during 100% duty cycle DC operation without external components. |
Pinout & Package
LT1158CSW#PBF is housed in a 16-lead plastic wide SOIC (SW) package with 1.27mm pitch, JEDEC MS-013AC compliant, thermal resistance θJA = 110°C/W. Pin 1 is BOOST DR; pin 16 is BOOST; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (BOOST DR) | Bootstrap capacitor recharge clamp | Drives external diode to maintain 14.5V headroom above top-source; prevents overcharge regardless of V+ transients. |
| Pin 6 (INPUT) | Logic command input | TTL/CMOS-compatible single-pin control: high = top-MOSFET on / bottom off; low = reverse state with latch reset on top-source discharge. |
| Pins 9 & 15 (B GATE DR / T GATE DR) | High-current gate drive outputs | Deliver >500mA peak to MOSFET gates; series gate resistors inserted here for damping and EMI control. |
| Pins 8 & 14 (B GATE FB / T GATE FB) | Direct gate feedback nodes | Monitor VGS in real time; provide DC sustaining current (100μA bottom, charge-pump-fed top); enforce turn-on inhibition until safe VGS decay. |
| Pins 11 & 12 (SENSE− / SENSE+) | Current-sense comparator inputs | Detect top-MOSFET current via shunt or Kelvin-connected sensing MOSFET; 110mV offset enables accurate <7.3A trip with 0.015Ω RSENSE. |
| Pin 5 (FAULT) | Open-collector fault indicator | Sinks current when VSENSE+–VSENSE− > 110mV; connects to ENABLE for automatic shutdown/retry cycle without external logic. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive non-overlap timing | Eliminates need for matched MOSFETs or external dead-time circuitry by dynamically enforcing minimum off-time based on actual gate voltage decay. |
| Internal charge pump | Enables true DC operation of top-side N-MOSFET without external bootstrap capacitor recharge path or timing constraints. |
| Continuous current limit loop | Regulates top-MOSFET short-circuit current to fixed 150mV sense voltage - delivers predictable, repeatable ILIM independent of supply or temperature drift. |
| Gate-to-source voltage clamping | Hard-limits VGS to 14.5V across full 5V–30V supply range - removes need for external Zener clamps and avoids efficiency loss from leakage. |
| TTL/CMOS input compatibility | 0.8V–2.0V threshold with 200mV hysteresis ensures reliable operation across logic families and noisy industrial environments without external level shifters. |
Applications
| Motor Control | Switching Regulator |
|---|---|
Use Scenario: Driving two-phase or three-phase brushless DC motors in industrial automation systems with 24V bus and 10A peak phase current. IC Role / Device Role: Half-bridge gate driver providing synchronized, shoot-through-protected control of high-side and low-side N-MOSFETs per phase leg. Use Value: Adaptive non-overlap and current-limit protection eliminate external timing components and prevent MOSFET failure during commutation transients. | Use Scenario: Synchronous buck converter delivering 5V/10A from 12V input in telecom power modules requiring >93% efficiency. IC Role / Device Role: Replaces Schottky freewheeling diode with actively controlled low-RDS(ON) N-MOSFET, driven by LT1158CSW#PBF's top/bottom outputs. Use Value: Charge pump enables 100% duty cycle top-MOSFET conduction; current-sense loop provides cycle-by-cycle overcurrent limiting tied to PWM controller soft-start. |
| Battery-Powered Systems | Industrial Actuators |
Use Scenario: 6V battery-powered portable tool with brushed DC motor requiring bidirectional control and stall protection. IC Role / Device Role: Half-bridge driver operating down to 4.5V supply, compatible with logic-level N-MOSFETs (VTH ≤ 2V) and integrated current sensing. Use Value: Low-voltage operation preserves gate drive strength; FAULT output triggers microcontroller shutdown before battery over-discharge or MOSFET thermal runaway. | Use Scenario: Hydraulic valve driver in factory machinery using inductive loads up to 200W with frequent PWM cycling and EMI-sensitive analog sensors nearby. IC Role / Device Role: High-noise-immunity gate driver with separated gate drive/feedback paths and built-in gate voltage clamping. Use Value: Dual gate connections (DR/FB) suppress ringing; 14.5V VGS clamp prevents gate oxide damage during load dump transients. |
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 600V max VBS, no internal charge pump - requires external bootstrap diode/capacitor; fixed dead time (500ns), no adaptive non-overlap. | Targeted at higher-voltage AC-DC PFC and inverter stages; lacks current-limit regulation and auto-retry capability. | Choose IRS21844STRPBF only if operating above 30V rail or needing 600V floating channel; LT1158CSW#PBF preferred for precision current limiting and shoot-through immunity below 30V. |
| LM5109BMAX/NOPB | Integrated high-side level shifter (no charge pump), 100ns typical propagation delay, no current-sense comparator or FAULT output. | Optimized for high-frequency (>1MHz) synchronous buck controllers; lacks integrated protection and fault-handling logic. | Choose LM5109BMAX/NOPB for ultra-fast, low-jitter timing-critical DC-DC; LT1158CSW#PBF remains superior for fault-resilient motor control and current-mode regulation. |
Compared with IRS21844STRPBF and LM5109BMAX/NOPB, the LT1158CSW#PBF uniquely combines adaptive non-overlap timing, internal charge pump for DC top-side drive, and closed-loop current limiting - making it the only option among the three that eliminates external protection circuitry and enables self-recovering fault response in 24V motor and regulator systems.
Availability
LT1158CSW#PBF is available at Aetrix Electronics and suitable for synchronous buck converters, BLDC motor drives, battery-powered tools, and industrial actuator systems requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for LT1158CSW#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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1158CSW#PBF belongs to ADI's legacy Linear Technology power management portfolio, engineered specifically for robust, shoot-through-immune N-MOSFET half-bridge driving in motor control and high-efficiency switching regulators.
FAQ
What is the maximum supply voltage rating for the LT1158CSW#PBF?
The LT1158CSW#PBF has an absolute maximum supply voltage (pins 2 and 10) of 36V. Its recommended operating range is 5V to 30V. Exceeding 36V risks permanent damage, and operation above 30V voids guaranteed performance specs including gate drive voltage clamping at 14.5V and current-limit accuracy.
Does the LT1158CSW#PBF require external bootstrap components for high-side drive?
The LT1158CSW#PBF requires an external bootstrap diode and capacitor for high-side N-MOSFET drive, but its internal charge pump maintains top-gate bias during DC operation. Pin 1 (BOOST DR) actively recharges the bootstrap capacitor and clamps its voltage to 14.5V above top-source potential - eliminating need for external regulation or overvoltage protection.
How does the LT1158CSW#PBF implement shoot-through protection?
The LT1158CSW#PBF uses adaptive non-overlap timing: it monitors gate voltages via dedicated feedback pins (8 and 14) and enforces turn-off-before-turn-on by inhibiting the next gate drive until VGS decays below 1.5V (bottom) or 1.75V (top). This eliminates matching requirements between MOSFETs and removes dependency on fixed dead-time circuits.
Can the LT1158CSW#PBF drive logic-level MOSFETs from a 5V supply?
Yes - the LT1158CSW#PBF operates down to 4.5V supply and delivers full gate drive strength to logic-level N-MOSFETs (VTH ≤ 2V). Its gate drive voltage is internally clamped to 14.5V, ensuring safe operation even with 5V logic inputs and low-threshold MOSFETs without external Zener clamps.
What is the function of the FAULT pin on the LT1158CSW#PBF?
The FAULT pin (pin 5) is an open-collector NPN output that sinks current when the sensed voltage across pins 11–12 exceeds 110mV. When connected back to the ENABLE pin, it triggers automatic shutdown and retry: the internal 25μA pull-up recharges the enable capacitor, restoring operation after fault clearance - a self-recovering protection feature unique to the LT1158CSW#PBF.
LT1158CSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT1158CSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1158CSW#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 LT1158CSW#PBF reliable?
The price and inventory of LT1158CSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1158CSW#PBF is usually 5 days.
3.What payment methods are accepted for LT1158CSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1158CSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1158CSW#PBF?
LT1158CSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1158CSW#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 LT1158CSW#PBF?
For technical support, including LT1158CSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1158CSW#PBF requirements.
6.How does Aetrix verify that LT1158CSW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1158CSW#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 LT1158CSW#PBF meets industry standards.
7.What is the process for return or replacement of LT1158CSW#PBF?
All LT1158CSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1158CSW#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 LT1158CSW#PBF part is unused and in its original packaging.
Return procedure for LT1158CSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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