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Analog Devices Inc. LT1160IS#PBF
- Part No.:
- LT1160IS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1160IS#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,172
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Product details
Overview
LT1160IS#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, adaptive nonoverlapping control, 180ns transition times into 10,000pF, TTL/CMOS-compatible inputs, and undervoltage lockout with hysteresis - used in synchronous buck regulators and motor control.
For engineers reviewing the LT1160IS#PBF datasheet, LT1160IS#PBF pinout, LT1160IS#PBF application, or LT1160IS#PBF equivalent, key selection criteria include top/bottom gate drive separation, bootstrap-based high-side operation, shoot-through prevention logic, thermal performance in SO-14 package, and compatibility with 10–15V supply rails and 60V HV systems.
Technical Context
The LT1160IS#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 circuitry. Its internal logic enforces strict nonoverlapping switching by monitoring gate feedback voltages (T GATE FB < 2.9V, B GATE FB < 2.5V) before enabling complementary outputs.
Undervoltage protection operates on both V+ (8.3–8.8V shutdown, 8.9–9.7V start-up) and VBOOST–T SOURCE (8.7–9.2V shutdown, 9.3–9.8V start-up), ensuring safe turn-off during brownout or bootstrap capacitor undercharge. The device supports PWM frequencies up to 100kHz with confirmed timing parameters including tD1 ≤ 500ns (top turn-on delay) and tr ≤ 200ns (top rise time).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 10V to 15V - defines minimum operating voltage for reliable gate drive strength and UVLO margin; exceeds 8.9V start-up threshold. |
| Max HV Rail | 60V - sets absolute upper limit for top MOSFET source voltage (T SOURCE), enabling use in 48V industrial and telecom systems. |
| Top Gate Rise/Fall Time | 130–200ns / 60–140ns - measured at T GATE DR into 3000pF load; enables efficient switching at ≥50kHz in buck converters. |
| Input Logic Thresholds | VIL ≤ 0.8V, VIH ≥ 2.0V - TTL/CMOS-compatible with 300mV hysteresis; ensures noise immunity in noisy motor drive environments. |
| UVLO Hysteresis | 0.5V (V+), 0.5V (VBOOST–T SOURCE) - prevents oscillatory enable/disable during slow supply ramp-up or transient dips. |
| Operating Temp Range | –40°C to +85°C - industrial-grade rating confirmed for LT1160IS#PBF; supports deployment in motor drives and power supplies without derating. |
| Package Thermal Resistance | θJA = 110°C/W (SO-14) - determines max allowable power dissipation (e.g., ~31mA @12V supply limits junction temp to 125°C at 85°C ambient). |
Pinout & Package
LT1160IS#PBF is housed in a 14-lead plastic SO (S package), 150 mil width, with exposed pad not present. Pin functions are electrically isolated between top and bottom driver sections, with dedicated signal (SV+, SGND) and power (PV+, PGND) grounds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SV+ | Main Signal Supply | Provides bias for logic and level-shifting circuits; must be decoupled to SGND with 10µF capacitor. |
| IN TOP / IN BOTTOM | Control Inputs | TTL/CMOS-compatible; internally disabled when opposite input is high - enforces mutual exclusion. |
| UV OUT | Open-collector UV Indicator | Sinks current when V+ or VBOOST–T SOURCE falls below threshold; used to disable upstream PWM controller. |
| SGND / PGND | Signal / Power Ground | Separate return paths prevent noise coupling; SGND connects to system logic ground, PGND to bottom MOSFET source. |
| BOOST / T SOURCE | Bootstrap Supply Interface | Forms floating supply for top driver: BOOST connects to high side of bootstrap cap, T SOURCE to top MOSFET source. |
| T GATE DR / B GATE DR | High-Current Gate Drive Outputs | Deliver peak 1.5A pulses; series gate resistors recommended to damp ringing and control dV/dt. |
| T GATE FB / B GATE FB | Gate Voltage Feedback Inputs | Direct connection to MOSFET gates enables adaptive dead-time control - top enabled only after bottom VGS < 2.5V, and vice versa. |
Key Features
| Feature | Design Value |
|---|---|
| Floating top driver | Supports gate drive of N-channel MOSFETs referenced to up to 60V HV rail using external bootstrap capacitor - eliminates need for isolated supplies. |
| Adaptive nonoverlapping control | Monitors actual gate-to-source voltage (via T/B GATE FB pins) to enforce minimum dead time - removes dependency on matched MOSFETs or precise timing calibration. |
| Independent UVLO on V+ and VBOOST | Dual undervoltage detection prevents unsafe operation during main supply sag or bootstrap capacitor discharge - critical for reliability in high-duty-cycle PWM. |
| Separate signal and power grounds | SGND and PGND pins allow clean separation of logic and high-current return paths - reduces noise coupling into input and feedback circuits. |
| 180ns transition into 10,000pF | Confirms robust drive capability for paralleled MOSFETs or high-Q gate structures - supports fast switching in high-efficiency 10A+ buck regulators. |
Applications
| Motor Control | Synchronous Buck Regulator |
|---|---|
Use Scenario: Unidirectional DC motor drive in industrial actuators or HVAC blowers using half-bridge topology with one LT1160IS#PBF. IC Role / Device Role: Controls top and bottom N-MOSFETs with adaptive dead time to prevent shoot-through during direction reversal or braking. Use Value: Enables "plugging" brake mode (fast stop via MOSFET shorting) and coasting, with no external logic required due to built-in input interlock. | Use Scenario: High-efficiency 40V→5V, 10A step-down converter for telecom or server power, replacing Schottky diode with synchronous N-MOSFET. IC Role / Device Role: Drives high-side switch and low-side synchronous rectifier with precise nonoverlapping timing to minimize conduction and switching losses. Use Value: Achieves >90% efficiency across load range by eliminating diode forward drop; maintains continuous conduction mode even at light loads. |
| Class D Audio Amplifier | 3-Phase BLDC Driver Stage |
Use Scenario: 200W, 10Hz–1kHz audio output stage using complementary half-bridges driven by LT1160IS#PBF per phase. IC Role / Device Role: Provides fast, matched gate drive to high- and low-side MOSFETs with UVLO-protected startup and bootstrap recharge management. Use Value: Delivers low THD+N through accurate dead-time control and stable gate voltage regulation - avoids crossover distortion at high slew rates. | Use Scenario: Gate driver section of sensorless 3-phase brushless DC motor controller for drones or power tools. IC Role / Device Role: One LT1160IS#PBF per half-bridge leg (total three) delivers isolated high-side drive and feedback-based commutation timing. Use Value: Enables compact, cost-effective implementation without optocouplers or isolated DC/DC - leverages bootstrap architecture and adaptive gate monitoring. |
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 |
|---|---|---|---|
| IRS21844SPbF | Higher max HV rail (600V), integrated bootstrap diode, 120ns typical propagation delay vs. 500ns max for LT1160IS#PBF. | Targeted at AC mains-connected inverters and PFC stages; less optimized for low-voltage (<100V), high-frequency buck converters. | Select IRS21844SPbF for >100V systems requiring integrated bootstrap diode; LT1160IS#PBF preferred for precision timing-critical 48V industrial buck designs. |
| LM5109BMAX/NOPB | Wider supply range (5–14V), lower quiescent current (1.6mA), but no gate feedback pins - fixed dead time only. | Lacks adaptive shoot-through protection; requires external dead-time tuning or matching MOSFETs for safe operation. | Choose LM5109BMAX/NOPB for cost-sensitive, low-power applications where fixed dead time suffices; LT1160IS#PBF remains superior for robustness in high-current, variable-load motor drives. |
Compared with IRS21844SPbF and LM5109BMAX/NOPB, the LT1160IS#PBF uniquely combines adaptive gate-feedback dead-time control, industrial temperature range, and proven 60V/100kHz performance - making it optimal for high-reliability synchronous buck and motor control where shoot-through risk must be eliminated without layout or component trade-offs.
Availability
LT1160IS#PBF is available at Aetrix Electronics and suitable for synchronous buck regulators, half-bridge motor control, Class D audio amplifiers, and 3-phase BLDC gate driver stages requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for LT1160IS#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 full product support, datasheets, and application engineering for legacy Linear parts including the LT1160 family.
The LT1160IS#PBF belongs to Linear's high-performance power MOSFET driver product line, designed specifically for robust, high-efficiency switching power conversion and motor control in industrial and telecom infrastructure.
FAQ
What is the maximum HV rail voltage supported by the LT1160IS#PBF?
The LT1160IS#PBF supports a maximum HV rail voltage of 60V, defined as the voltage at the T SOURCE pin relative to system ground. This rating is confirmed in Absolute Maximum Ratings and validated in all typical applications, including 40V→5V buck converters and 48V motor drives. Exceeding 60V risks permanent damage to the top driver section.
Does the LT1160IS#PBF require external bootstrap diodes?
No, the LT1160IS#PBF does not integrate a bootstrap diode and requires an external diode (e.g., 1N4148) between PV+ and BOOST to charge the bootstrap capacitor during bottom-FET conduction. This discrete approach allows optimization of reverse recovery and leakage - critical for high-frequency, high-duty-cycle operation where integrated diodes may compromise efficiency.
How does the LT1160IS#PBF prevent shoot-through in half-bridge configurations?
The LT1160IS#PBF prevents shoot-through using adaptive nonoverlapping gate drive: it monitors actual gate-to-source voltage via dedicated T GATE FB and B GATE FB pins, and only enables the top driver after bottom VGS falls below 2.5V, and vice versa. This hardware-enforced sequence eliminates reliance on matched MOSFETs or precise timing calibration - a core differentiator versus fixed-dead-time drivers.
What are the thermal limitations of the LT1160IS#PBF in SO-14 package?
The LT1160IS#PBF in SO-14 package has θJA = 110°C/W. At 85°C ambient and 12V supply, maximum allowable average supply current is ~31mA to keep junction temperature ≤125°C. This corresponds to driving ~3000pF load at ≤100kHz. Higher gate capacitance or frequency requires careful thermal design or derating - verified in Typical Performance Characteristics Figure G02 and G03.
Can the LT1160IS#PBF drive multiple parallel MOSFETs per channel?
Yes, the LT1160IS#PBF can drive up to five parallel N-channel MOSFETs per channel, as confirmed in Applications Information. Each gate should include a small series resistor (10Ω–47Ω) to suppress high-frequency oscillation, and the corresponding gate feedback pin connects to any one MOSFET gate. Total gate charge loading increases linearly, so switching frequency must be adjusted to maintain safe junction temperature - detailed in Gate Charge and Driver Dissipation section.
LT1160IS#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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT1160IS#PBF FAQ
1.How can I place an order for LT1160IS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1160IS#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 LT1160IS#PBF reliable?
The price and inventory of LT1160IS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1160IS#PBF is usually 5 days.
3.What payment methods are accepted for LT1160IS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1160IS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1160IS#PBF?
LT1160IS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1160IS#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 LT1160IS#PBF?
For technical support, including LT1160IS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1160IS#PBF requirements.
6.How does Aetrix verify that LT1160IS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1160IS#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 LT1160IS#PBF meets industry standards.
7.What is the process for return or replacement of LT1160IS#PBF?
All LT1160IS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1160IS#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 LT1160IS#PBF part is unused and in its original packaging.
Return procedure for LT1160IS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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