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Analog Devices Inc. LT1160CS#PBF
- Part No.:
- LT1160CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1160CS#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,783
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Product details
Overview
LT1160CS#PBF from Analog Devices (formerly Linear Technology) is a half-bridge N-channel power MOSFET driver IC with floating high-side gate drive capability up to 60V HV rail, 180ns transition times into 10,000pF load, adaptive nonoverlapping logic, and separate top/bottom gate drive/feedback pins. It enables efficient synchronous buck regulators and half-bridge motor control.
For engineers reviewing the LT1160CS#PBF datasheet, LT1160CS#PBF pinout, LT1160CS#PBF application, or LT1160CS#PBF equivalent, key selection criteria include bootstrap-based high-side drive compliance with 60V max top-source voltage, undervoltage lockout thresholds (V+UVH = 8.9V), TTL/CMOS input compatibility, and thermal performance in SO-14 package (θJA = 110°C/W).
Technical Context
The LT1160CS#PBF integrates two independent noninverting gate drivers: a grounded bottom driver (PV+, PGND, B GATE DR/FB) and a floating top driver powered via BOOST–T SOURCE bootstrap capacitor. Its internal logic enforces strict nonoverlap-turn-off precedes turn-on-and monitors VGS via dedicated feedback pins (T GATE FB, B GATE FB) before enabling complementary switching.
Undervoltage protection operates on both supply rails: V+ lockout (8.3V shutdown / 8.9V start-up) and BOOST-to-T SOURCE lockout (8.7V / 9.3V), each with 0.5V hysteresis. Input thresholds are regulated at 0.8V (low) and 1.7V (high), supporting direct TTL/CMOS interfacing without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Top-Side Voltage Rating | 60V max T SOURCE voltage-supports HV rails in buck converters and motor drives without external level shifters. |
| Gate Drive Transition Time | 180ns typical rise/fall into 10,000pF-enables reliable PWM operation up to 100kHz with low switching loss. |
| Supply Voltage Range | 10V to 15V-matches standard 12V system rails; absolute max 20V prevents latch-up during transients. |
| Input Logic Thresholds | VIL = 0.8V, VIH = 1.7V-guarantees noise-immune TTL/CMOS compatibility across full temperature range. |
| Undervoltage Lockout Hysteresis | 0.5V on both V+ and BOOST rails-ensures clean startup/shutdown without oscillation during brown-out conditions. |
| Thermal Resistance | θJA = 110°C/W (SO-14)-defines maximum continuous power dissipation (≈31mA @12V) for industrial temp range (–40°C to 85°C). |
| Peak Output Current | 1.5A (<10µs)-delivers sufficient peak gate charge current to drive multiple paralleled MOSFETs (e.g., five IRFZ44). |
Pinout & Package
LT1160CS#PBF is housed in a 14-lead plastic SO (S package), JEDEC MS-012AC compliant, with 1.27mm pitch and exposed pad not present. Pin functions are electrically isolated between top/bottom channels and include dedicated gate drive/feedback pairs for shoot-through prevention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SV+ | Main signal supply input | Supplies logic and level-shift circuitry; must be decoupled to SGND with ≥10µF capacitor. |
| IN TOP / IN BOTTOM | Independent TTL/CMOS inputs | Noninverting control signals; internally disabled when opposite input is high-hardwired mutual exclusion. |
| UV OUT | Open-collector NPN fault indicator | Sinks current when V+ or BOOST undervoltage occurs; used to disable upstream PWM controller. |
| SGND | Small-signal ground reference | Separate return path for SV+, UV OUT, and logic-prevents noise coupling into gate feedback paths. |
| PGND | Power ground for bottom driver | Connects directly to source of bottom N-MOSFET; must be low-inductance path to minimize shoot-through risk. |
| T SOURCE | Floating return for top driver | Connects to top MOSFET source and bootstrap capacitor low side-defines local ground for high-side logic. |
| T GATE DR / B GATE DR | High-current gate drive outputs | Deliver 1.5A peak to MOSFET gates; series gate resistors recommended to damp ringing. |
| T GATE FB / B GATE FB | Direct gate voltage monitoring inputs | Enable adaptive dead-time control-top driver won't enable until B GATE FB < 2.5V, and vice versa. |
| BOOST | Bootstrap capacitor high-side connection | Charged via internal diode during bottom-FET conduction; supplies floating VDD for top driver. |
| PV+ | Bottom driver supply | Must tie to SV+; powers bottom gate driver stage independently from floating top supply. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive nonoverlapping gate drive | Eliminates need for external dead-time circuits or matched MOSFETs by sensing actual VGS before enabling complementary FET. |
| Floating top driver with 60V rating | Enables high-side N-MOSFET use in buck converters up to 60V input-replacing less efficient P-MOSFETs or diodes. |
| Dual independent gate feedback paths | Ensures precise VGS monitoring per channel (2.5V bottom, 2.9V top thresholds), preventing partial turn-on and shoot-through. |
| Integrated undervoltage lockout with hysteresis | Prevents erratic switching during brown-out by forcing both outputs low until stable V+ and BOOST voltages are confirmed. |
| TTL/CMOS-compatible inputs with internal clamping | Accepts 0–5V logic directly; 3kΩ input resistors + 5V clamps protect against overvoltage and simplify microcontroller interface. |
Applications
| Switching Regulator Synchronous Rectification | Half-Bridge DC Motor Control |
|---|---|
Use Scenario: Replacing Schottky diode in 40V→5V, 10A buck converter operating at 40kHz. IC Role / Device Role / Timing Role: LT1160CS#PBF drives top N-MOSFET as main switch and bottom N-MOSFET as synchronous rectifier, replacing lossy diode conduction. Use Value: Enables >90% efficiency by eliminating diode forward drop; supports discontinuous conduction mode with controlled reverse current recirculation. | Use Scenario: Bidirectional speed control of 24V brushed DC motor in industrial actuator. IC Role / Device Role / Timing Role: LT1160CS#PBF controls half-bridge output stage (IRFZ44 pair) using PWM inputs to regulate direction and torque. Use Value: Delivers fast "plugging" braking via simultaneous top/bottom FET activation; adaptive dead time prevents shoot-through during rapid direction reversal. |
| Class D Audio Amplifier Gate Driving | High-Current Inductive Load Switching |
Use Scenario: 200W, 10Hz–1kHz Class D amplifier using complementary MOSFET half-bridge output stage. IC Role / Device Role / Timing Role: LT1160CS#PBF provides matched, low-propagation-delay gate drive to high-side/low-side FETs modulated at 100kHz carrier frequency. Use Value: 180ns transitions and <600ns total propagation delay preserve PWM fidelity; dual feedback ensures zero-voltage switching alignment. | Use Scenario: 60V, 30A solenoid driver in automotive HVAC valve control with 100ms on-time pulses. IC Role / Device Role / Timing Role: LT1160CS#PBF drives paralleled IRFZ44 MOSFETs (5× per side) to switch high inductive load with controlled dI/dt. Use Value: 1.5A peak drive current and adaptive gate feedback maintain robust turn-on even with large gate charge (QG ≈ 60nC per FET). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS21844SPbF | Higher VBS rating (600V), integrated bootstrap diode, no gate feedback pins-relies on fixed dead time. | Better suited for high-voltage AC inverters; lacks adaptive VGS monitoring for ultra-low RDS(ON) MOSFET optimization. | Choose IRS21844SPbF for >100V systems where bootstrap diode integration reduces BOM count; avoid when precise shoot-through prevention is critical. |
| LM5109BMAX/NOPB | Wider supply range (5–14V), lower quiescent current (1.6mA), no UVLO on bootstrap rail-single VDD domain. | Ideal for low-voltage, battery-powered half-bridges; cannot monitor BOOST–T SOURCE margin like LT1160CS#PBF. | Choose LM5109BMAX/NOPB for 12V-only systems prioritizing efficiency over HV robustness; retain LT1160CS#PBF when 60V HV rail and dual UVLO are required. |
Compared with IRS21844SPbF and LM5109BMAX/NOPB, the LT1160CS#PBF uniquely combines 60V top-side rating, dual-rail undervoltage detection, and adaptive gate feedback-making it optimal for industrial 40–60V synchronous buck and motor drives where shoot-through immunity is non-negotiable.
Availability
LT1160CS#PBF is available at Aetrix Electronics and suitable for synchronous buck regulators, half-bridge motor controllers, and Class D audio amplifiers requiring stable component supply, long-term industrial temperature support (–40°C to 85°C), and guaranteed traceable sourcing.
Supply support for LT1160CS#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 acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio. Linear pioneered high-performance power ICs with emphasis on reliability and application-specific integration.
The LT1160CS#PBF belongs to Linear's legacy high-voltage gate driver family, designed specifically for cost-sensitive, high-efficiency DC-DC conversion and motor control where adaptive shoot-through protection and bootstrap-based high-side drive are essential.
FAQ
What is the maximum allowable voltage on the T SOURCE pin of the LT1160CS#PBF?
The LT1160CS#PBF specifies a maximum top-source voltage of 60V, meaning the T SOURCE pin can safely swing from –5V to +60V relative to SGND. This rating enables direct use with 48V industrial bus systems and 60V max-input buck converters. Exceeding 60V risks permanent damage per Absolute Maximum Ratings.
Does the LT1160CS#PBF require external bootstrap diodes?
No, the LT1160CS#PBF integrates an internal bootstrap diode between SV+ and BOOST pins. An external 1µF ceramic capacitor must still be placed between BOOST and T SOURCE to form the floating supply for the top driver. External diodes are unnecessary and would interfere with internal charging behavior.
How does the LT1160CS#PBF prevent shoot-through in half-bridge configurations?
The LT1160CS#PBF prevents shoot-through using adaptive nonoverlapping logic: it monitors actual gate voltage via dedicated T GATE FB and B GATE FB pins, and only enables the complementary FET after confirming the active FET's VGS has fallen below 2.5V (bottom) or 2.9V (top). This eliminates reliance on fixed dead-time timing or MOSFET matching.
What is the purpose of the UV OUT pin on the LT1160CS#PBF?
The UV OUT pin on the LT1160CS#PBF is an open-collector NPN output that sinks current when either V+ drops below 8.3V or BOOST–T SOURCE falls below 8.7V. It is used to signal upstream controllers (e.g., PWM ICs) to halt switching during undervoltage conditions, preventing partial MOSFET turn-on and thermal runaway.
Can the LT1160CS#PBF drive multiple parallel MOSFETs on one channel?
Yes, the LT1160CS#PBF can drive up to five parallel N-channel MOSFETs per channel (top or bottom) while maintaining sub-200ns transitions, as verified in Typical Performance Characteristics. Use individual 10Ω–47Ω gate resistors per FET to suppress high-frequency oscillation, and connect only one B GATE FB or T GATE FB pin to any single gate for feedback.
LT1160CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 10V ~ 15V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- 1.5A, 1.5A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 60 V
- Rise / Fall Time (Typ):
- 130ns, 60ns
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT1160CS#PBF FAQ
1.How can I place an order for LT1160CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1160CS#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 LT1160CS#PBF reliable?
The price and inventory of LT1160CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1160CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1160CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1160CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1160CS#PBF?
LT1160CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1160CS#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 LT1160CS#PBF?
For technical support, including LT1160CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1160CS#PBF requirements.
6.How does Aetrix verify that LT1160CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1160CS#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 LT1160CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1160CS#PBF?
All LT1160CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1160CS#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 LT1160CS#PBF part is unused and in its original packaging.
Return procedure for LT1160CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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