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Analog Devices Inc. LT1158CN#PBF
- Part No.:
- LT1158CN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1158CN#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:509
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Product details
Overview
LT1158CN#PBF from Analog Devices (formerly Linear Technology) is a half-bridge N-channel power MOSFET driver IC designed to synchronously control two external N-MOSFETs in totem-pole configuration. It features adaptive non-overlap gate drives, 150 ns transition times into 3000 pF, >500 mA peak output current, and integrated charge pump for high-side DC operation. It is used in synchronous step-down switching regulators and motor control systems requiring shoot-through protection.
For engineers reviewing the LT1158CN#PBF datasheet, LT1158CN#PBF pinout, LT1158CN#PBF application, or LT1158CN#PBF equivalent, key selection criteria include its 5–30 V supply range, internal 14.5 V gate voltage clamp, continuous current limit loop with 130 mV threshold, fault output with auto-shutdown/retry, and compatibility with logic-level MOSFETs in battery-powered systems.
Technical Context
The LT1158CN#PBF implements dual independent gate drivers with separate drive (DR) and feedback (FB) pins per side, enabling precise gate voltage monitoring and DC sustaining current delivery-100 µA for bottom side, charge-pump-fed for top side. Its adaptive non-overlap logic prevents shoot-through by sequencing turn-off before turn-on based on actual VGS thresholds (1.75 V for top, 1.5 V for bottom), eliminating MOSFET matching requirements.
It integrates a regulated boost driver (pin 1) that clamps bootstrap voltage to 14.5 V above top source (pin 13), supports V+ from 5 V to 30 V, and includes a current-sense comparator with 110 mV fault conduction threshold and 130 mV closed-loop current limit threshold referenced to SENSE+ (pin 12) and SENSE– (pin 11).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 30 V - enables direct use with 5 V logic, 12 V industrial rails, and 24 V battery systems without level shifting. |
| Top Gate Rise/Fall Time | 130 ns / 120 ns (into 3000 pF) - ensures fast switching with minimal dead-time loss in high-frequency buck converters. |
| Peak Output Current | >500 mA - sufficient to drive multiple parallel N-MOSFETs (e.g., four IRFZ34 devices) without external buffers. |
| Current Limit Threshold | 130 mV (closed-loop) - sets top MOSFET short-circuit current as ISC = 130 mV / RSENSE, enabling precise overcurrent protection. |
| Gate Voltage Clamp | 14.5 V - protects standard N-MOSFETs (e.g., VGS(max) = 20 V) from overdrive while maintaining strong enhancement at V+ up to 30 V. |
| Fault Response | Open-collector FAULT output sinks current when VSENSE+ – VSENSE– > 110 mV; auto-retry via ENABLE pull-up - enables self-resetting current limiting in motor drives. |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade embedded power stages, including industrial motor controllers and DC-DC modules. |
Pinout & Package
LT1158CN#PBF is housed in a 16-lead plastic DIP (N package) with 0.300″ wide body and through-hole mounting. Thermal resistance θJA = 70°C/W. Pin 7 is GND; pins 2 and 10 are tied to V+; pin 13 is T SOURCE (top MOSFET source return); pin 16 is BOOST (bootstrap capacitor high-side connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (BOOST DR) | Bootstrap capacitor recharge clamp | Recharges external bootstrap diode/capacitor and clamps voltage to 14.5 V above T SOURCE - ensures reliable top-side gate drive during PWM and DC operation. |
| Pin 4 (ENABLE) | Global driver enable control | Open-circuit = normal operation; pulled low = both MOSFETs actively held off - enables safe shutdown in multi-phase motor control. |
| Pin 5 (FAULT) | Open-collector fault indicator | Sinks current when current sense exceeds 110 mV; connects to ENABLE for auto-shutdown/retry - implements self-protecting current limiting. |
| Pin 6 (INPUT) | Logic-level input control | TTL/CMOS-compatible; 0.8 V low / 1.4 V high threshold with 200 mV hysteresis - accepts direct PWM signals without external level translation. |
| Pins 9 & 15 (B GATE DR / T GATE DR) | High-current gate drive outputs | Deliver >500 mA peak to MOSFET gates via optional series resistors - minimize switching losses while allowing EMI tuning. |
| Pins 8 & 14 (B GATE FB / T GATE FB) | Direct gate feedback connections | Monitor actual VGS to enforce turn-on sequencing and sustain gate voltage - eliminate need for external gate hold circuits. |
| Pins 11 & 12 (SENSE– / SENSE+) | Differential current sense inputs | Measure voltage across shunt or current-sensing MOSFET; 130 mV closed-loop threshold regulates top MOSFET short-circuit current. |
| Pin 13 (T SOURCE) | Top-side floating reference | Return node for top MOSFET source and bootstrap capacitor - defines local ground for high-side driver and current sense circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive non-overlap gate drive | Eliminates shoot-through by verifying VGS < 1.75 V (top) or < 1.5 V (bottom) before enabling opposite FET - removes MOSFET matching constraints and simplifies layout. |
| Integrated charge pump | Maintains top gate drive during 100% duty cycle by generating floating supply - enables true DC operation without external bootstrap components. |
| Continuous current limit loop | Regulates top MOSFET current to fixed value (I = 130 mV / RSENSE) during overload - prevents thermal runaway without external op-amps or comparators. |
| Auto-shutdown and retry | FAULT output pulls ENABLE low on overcurrent; internal 25 µA pull-up re-enables after fault clears - provides autonomous fault recovery in unattended systems. |
| Built-in gate voltage protection | Clamps gate-to-source voltage to 14.5 V regardless of V+ (up to 30 V) - protects logic-level and standard N-MOSFETs without external Zeners. |
Applications
| Motor Control in Power Tools | Synchronous Buck Regulator for Industrial PLCs |
|---|---|
Use Scenario: Cordless drill with 18 V Li-ion battery driving brushed DC motor via H-bridge. IC Role / Device Role / Timing Role: Half-bridge driver controlling top/bottom N-MOSFETs; adaptive non-overlap prevents shoot-through during direction reversal. Use Value: Enables efficient 10–30 A motor current handling with no MOSFET matching, reducing BOM cost and improving reliability under stall conditions. | Use Scenario: 12 V input to 3.3 V/5 A output DC-DC converter in programmable logic controller. IC Role / Device Role / Timing Role: Synchronous switch driver replacing Schottky diode; current sense input feeds back to PWM controller for cycle-by-cycle current limiting. Use Value: Increases efficiency from ~75% (diode-based) to >92% at full load, eliminating heatsink requirement for 5 A output. |
| Three-Phase Brushless DC Fan Driver | Battery-Operated Logic-Level MOSFET Interface |
Use Scenario: 24 V HVAC blower using three half-bridges (three LT1158CN#PBFs) for sensorless BLDC commutation. IC Role / Device Role / Timing Role: Gate driver for each phase leg; FAULT outputs monitored by MCU for stall detection and soft-start control. Use Value: Fault output auto-retry allows graceful restart after fan jam; 5 V compatible input enables direct interface with 3.3 V microcontroller PWM outputs. | Use Scenario: Portable medical device with 6 V lead-acid battery driving logic-level N-MOSFETs (e.g., SI2302) for load switching. IC Role / Device Role / Timing Role: High-side and low-side driver supporting 100% duty cycle via internal charge pump; operates down to 4.5 V supply. Use Value: Maintains full gate drive strength at low battery voltage, preventing MOSFET linear-mode operation and associated thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge N-channel MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS21844PbF | Higher 600 V max bootstrap voltage; no integrated current limit loop; requires external sense resistor and comparator for overcurrent protection. | Targeted at higher-voltage AC-DC PFC and inverter stages; lacks built-in fault management for low-voltage DC systems. | Select IRS21844PbF only when operating above 30 V or requiring 600 V isolation; LT1158CN#PBF is superior for ≤30 V current-regulated applications. |
| LM5109BMAX/NOPB | Fixed 120 ns dead time; no adaptive non-overlap; no internal current sense comparator; 1.5 A peak drive vs 500 mA. | Optimized for high-frequency (>1 MHz) buck controllers; lacks fault output and auto-retry - requires external supervision circuitry. | Choose LM5109BMAX/NOPB for ultra-high-speed designs where timing predictability outweighs protection features; LT1158CN#PBF preferred when robustness and integration are critical. |
Compared with IRS21844PbF and LM5109BMAX/NOPB, the LT1158CN#PBF uniquely combines adaptive shoot-through prevention, integrated current limiting, and auto-retry fault handling in a single 16-pin DIP package - reducing system component count and improving safety in battery-powered and industrial motor control.
Availability
LT1158CN#PBF is available at Aetrix Electronics and suitable for synchronous buck regulators, motor control inverters, and battery-operated power tools requiring stable component supply, long-term lifecycle support, and commercial-temperature-grade reliability.
Supply support for LT1158CN#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 power management ICs, acquired Linear Technology in 2017 to strengthen its precision power and interface portfolio.
The LT1158CN#PBF belongs to ADI's legacy Linear Technology power driver family, engineered specifically for robust, integrated half-bridge control in efficiency-critical DC-DC and motor drive applications - emphasizing shoot-through immunity, current regulation, and seamless DC operation.
FAQ
What is the maximum supply voltage rating for the LT1158CN#PBF?
The LT1158CN#PBF has an absolute maximum supply voltage (pins 2 and 10) of 36 V. Its recommended operating range is 5 V to 30 V. Exceeding 36 V risks permanent damage. The internal charge pump and gate clamp remain functional across this full range, ensuring consistent 14.5 V gate drive even at 30 V V+.
Does the LT1158CN#PBF support 100% duty cycle operation for the high-side MOSFET?
Yes, the LT1158CN#PBF supports true 100% duty cycle for the top-side MOSFET via its on-chip charge pump, which maintains gate drive when the bootstrap capacitor would otherwise deplete. This eliminates the need for external charge pump circuitry and enables DC operation in applications like motor holding or constant-current sources.
How does the LT1158CN#PBF implement shoot-through protection?
The LT1158CN#PBF uses adaptive non-overlap logic: it monitors actual gate-to-source voltage (via pins 8 and 14) and delays turning on the opposing MOSFET until VGS falls below 1.75 V (top) or 1.5 V (bottom). This hardware-enforced sequencing eliminates reliance on matched MOSFETs or precise external timing, making it inherently robust against process and temperature variation.
Can the LT1158CN#PBF drive logic-level MOSFETs from a 5 V supply?
Yes, the LT1158CN#PBF operates down to 4.5 V and delivers full gate drive strength at 5 V, making it ideal for logic-level N-MOSFETs (e.g., VGS(th) ≤ 2 V). Its gate voltage is internally clamped to 14.5 V, protecting low-VGS(max) devices - unlike CMOS drivers, its switching speed does not degrade at low supply voltages.
What is the function of the FAULT and ENABLE pins on the LT1158CN#PBF?
The FAULT pin (5) is an open-collector output that sinks current when the current sense threshold (110 mV) is exceeded. Connecting FAULT to ENABLE creates an auto-shutdown/retry loop: fault triggers shutdown, and the internal 25 µA pull-up on ENABLE gradually re-enables the LT1158CN#PBF once the fault condition clears - enabling autonomous recovery without MCU intervention.
LT1158CN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
LT1158CN#PBF FAQ
1.How can I place an order for LT1158CN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1158CN#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 LT1158CN#PBF reliable?
The price and inventory of LT1158CN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1158CN#PBF is usually 5 days.
3.What payment methods are accepted for LT1158CN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1158CN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1158CN#PBF?
LT1158CN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1158CN#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 LT1158CN#PBF?
For technical support, including LT1158CN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1158CN#PBF requirements.
6.How does Aetrix verify that LT1158CN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1158CN#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 LT1158CN#PBF meets industry standards.
7.What is the process for return or replacement of LT1158CN#PBF?
All LT1158CN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1158CN#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 LT1158CN#PBF part is unused and in its original packaging.
Return procedure for LT1158CN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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