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Analog Devices Inc. LT1162ISW#PBF
- Part No.:
- LT1162ISW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1162ISW#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,721
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Product details
Overview
LT1162ISW#PBF from Analog Devices (formerly Linear Technology) is a dual high-voltage N-channel MOSFET gate driver IC for half-bridge and full-bridge topologies. It integrates two independent drivers, supports up to 60V floating top-side operation, delivers 1.5A peak output current, features adaptive nonoverlapping gate control to prevent shoot-through, and operates from 10V to 15V supply with TTL/CMOS-compatible inputs - used in synchronous buck regulators and brushless DC motor drives.
For engineers reviewing the LT1162ISW#PBF datasheet, LT1162ISW#PBF pinout, LT1162ISW#PBF application, or LT1162ISW#PBF equivalent, key selection criteria include its 60V HV rail tolerance, dual-channel isolation, undervoltage lockout with hysteresis on both V+ and BOOST, 180ns typical transition time into 10nF load, and industrial temperature range (–40°C to +85°C).
Technical Context
The LT1162ISW#PBF implements two fully independent gate driver channels, each with separate input, drive, feedback, and supply pins. Its adaptive shoot-through protection monitors gate feedback voltages (T GATE FB / B GATE FB) to enforce dead-time - turning off one MOSFET before enabling the other - eliminating external timing components and MOSFET matching requirements.
It uses bootstrap topology for high-side drive: BOOST and T SOURCE pins interface with an external capacitor to generate a floating supply for the top driver. Undervoltage detection operates independently on V+ (7.8V–9.7V threshold) and BOOST-to-T SOURCE (8.2V–9.8V), ensuring safe disable under brownout conditions on either rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 10V to 15V - ensures stable operation across standard logic-supply rails; absolute max 20V prevents latch-up during transients. |
| Floating Top-Side Voltage | Up to 60V - enables direct driving of high-side N-MOSFETs in buck, half-bridge, and motor inverters without level-shifting. |
| Peak Output Current | 1.5A - sufficient to rapidly charge/discharge gates of multiple paralleled MOSFETs (e.g., IRFZ44) at >100kHz switching frequencies. |
| Transition Time (10nF) | 180ns typical - minimizes switching losses in high-efficiency power stages; rise/fall times specified separately (90–200ns). |
| Undervoltage Lockout | V+ threshold: 7.8V–9.7V (0.5V hysteresis); BOOST–T SOURCE threshold: 8.2V–9.8V - prevents partial turn-on during startup or brownout. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control and power supplies. |
| Input Logic Levels | VIL ≤ 0.8V, VIH ≥ 1.7V - compatible with TTL and CMOS logic families without level translation. |
Pinout & Package
LT1162ISW#PBF is housed in a 24-pin SO Wide (SW) package with 0.300-inch body width and gull-wing leads. Thermal resistance θJA = 80°C/W supports moderate-power applications without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SV+ (Pins 1, 7) | Main signal supply input | Provides bias for logic and bottom driver; requires local 10µF decoupling to GND A/B. |
| IN TOP A/B (Pins 2, 8) | Top driver enable input | TTL/CMOS-compatible; disables when corresponding IN BOTTOM is high - enforces mutual exclusion. |
| IN BOTTOM A/B (Pins 3, 9) | Bottom driver enable input | Same logic compatibility; disables when corresponding IN TOP is high - prevents simultaneous conduction. |
| UV OUT A/B (Pins 4, 10) | Open-collector undervoltage flag | Sinks current when V+ falls below lockout threshold - used for system fault signaling or controller reset. |
| GND A/B (Pins 5, 11) | Signal ground reference | Separate ground returns for each channel reduce crosstalk; must tie to system ground at single point. |
| B GATE FB A/B (Pins 6, 12) | Bottom gate voltage monitor | Direct connection to MOSFET gate; inhibits top driver until gate discharges below 2.5V - ensures clean dead-time. |
| PV+ (Pins 14, 20) | Bottom driver supply | Connected to same rail as SV+; powers low-side gate driver stage. |
| T SOURCE (Pins 15, 21) | High-side return node | Connects to source of top MOSFET and low side of bootstrap capacitor - defines floating reference for top driver. |
| T GATE FB A/B (Pins 16, 22) | Top gate voltage monitor | Direct gate connection; inhibits bottom driver until VGS drops below 2.9V - critical for shoot-through prevention. |
| T GATE DR A/B (Pins 17, 23) | Top gate drive output | High-current source/sink node; series gate resistor optional to damp ringing and control dV/dt. |
| BOOST A/B (Pins 18, 24) | Bootstrap capacitor high-side node | Charged via internal diode during low-side conduction; provides floating VDD for top driver during high-side on-time. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive nonoverlapping gate drive | Eliminates need for external dead-time generators or matched MOSFETs by monitoring gate feedback voltages in real time. |
| Floating top driver (60V max) | Enables use of efficient N-channel MOSFETs on high-side switches without P-channel or isolated gate drivers. |
| Dual independent channels | Each channel has dedicated inputs, outputs, and feedback - supports H-bridge motor control or dual-phase synchronous rectification. |
| Undervoltage lockout with hysteresis | Independent monitoring of V+ and BOOST–T SOURCE rails prevents erratic behavior during supply ramp-up or brownout events. |
| TTL/CMOS input compatibility | Accepts standard logic levels directly - simplifies interface with microcontrollers, PWM controllers (e.g., LT3526), and FPGA outputs. |
Applications
| Synchronous Step-Down Switching Regulator | Half-Bridge Motor Control |
|---|---|
Use Scenario: High-efficiency 40V-to-5V, 10A DC-DC conversion in industrial power supplies. IC Role / Device Role / Timing Role: Drives top N-MOSFET as main switch and bottom N-MOSFET as synchronous rectifier; replaces lossy Schottky diode. Use Value: Enables >90% efficiency by minimizing conduction losses; eliminates reverse-recovery losses and allows continuous conduction mode at light loads. | Use Scenario: Bidirectional 24V DC motor control in automated valves or robotic joints. IC Role / Device Role / Timing Role: Controls H-bridge using both LT1162ISW#PBF channels - one per leg - with independent PWM inputs for direction and speed. Use Value: Supports plugging braking (rapid stop) and coasting via precise nonoverlapping drive; eliminates shoot-through risk even under transient load changes. |
| 3-Phase Brushless Motor Drive | Class D Audio Amplifier |
Use Scenario: Sensorless BLDC commutation in HVAC blowers or power tools operating from 36V bus. IC Role / Device Role / Timing Role: One LT1162ISW#PBF drives two legs of a 3-phase inverter; third leg driven by second LT1162ISW#PBF or LT1160. Use Value: Adaptive dead-time ensures robust commutation across wide RPM range; 60V rating accommodates back-EMF spikes during fast deceleration. | Use Scenario: 200W, 10Hz–1kHz audio amplifier with low THD+N in pro-audio equipment. IC Role / Device Role / Timing Role: Gate driver for complementary N-MOSFET output stage; handles high-frequency PWM carrier (100kHz) with minimal propagation delay. Use Value: 180ns transition time and <600ns total delay preserve PWM fidelity; dual-channel layout simplifies symmetric push-pull gate drive routing. |
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 |
|---|---|---|---|
| IRS21844PbF | Higher 600V floating capability; integrated bootstrap diode; no gate feedback pins - relies on fixed dead-time. | Targeted at higher-voltage AC-DC PFC and inverter stages; less suitable for precision shoot-through-critical motor control. | Choose IRS21844PbF for >100V bus applications where fixed dead-time is acceptable; LT1162ISW#PBF preferred where adaptive protection is required. |
| LM5109BMAX | Single-channel; 100V max floating voltage; no UVLO on BOOST rail; 1.2A peak current - lower drive strength. | Optimized for cost-sensitive buck converters; lacks dual-channel integration for H-bridge or 3-phase systems. | Use LM5109BMAX for single-leg synchronous rectification; LT1162ISW#PBF remains optimal for dual-leg motor or inverter control requiring matched timing and independent UVLO. |
Compared with IRS21844PbF and LM5109BMAX, the LT1162ISW#PBF uniquely combines dual-channel integration, adaptive shoot-through protection via gate feedback, and independent BOOST-rail UVLO - making it the preferred choice for industrial motor drives and high-reliability synchronous buck designs where MOSFET safety and timing precision are critical.
Availability
LT1162ISW#PBF is available at Aetrix Electronics and suitable for synchronous step-down regulators, half-bridge motor control, and 3-phase brushless motor drives requiring stable component supply, long-term industrial-grade availability, and guaranteed traceable sourcing.
Supply support for LT1162ISW#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 notes for legacy Linear parts including the LT1162ISW#PBF.
The LT1162ISW#PBF belongs to Linear's high-performance power MOSFET driver family, designed specifically for robust, high-efficiency switching power supplies and motor control systems demanding precise gate timing and shoot-through immunity.
FAQ
What is the maximum floating voltage supported by the LT1162ISW#PBF high-side driver?
The LT1162ISW#PBF supports a maximum floating top-side voltage of 60V referenced to its T SOURCE pin. This is specified in the Absolute Maximum Ratings table and validated across the full –40°C to +85°C industrial temperature range. Operation above 60V risks permanent damage; for higher-voltage applications, consider alternatives like the IRS21844PbF rated to 600V.
Does the LT1162ISW#PBF require external bootstrap diodes?
No, the LT1162ISW#PBF does not require external bootstrap diodes. Its internal architecture includes integrated diodes that charge the external bootstrap capacitor (connected between BOOST and T SOURCE) during the bottom-FET conduction phase. External diodes are unnecessary and would interfere with normal operation.
How does the adaptive shoot-through protection work in the LT1162ISW#PBF?
The LT1162ISW#PBF implements adaptive shoot-through protection by continuously monitoring T GATE FB and B GATE FB pins. Before enabling one driver, it verifies the opposing MOSFET's gate voltage has discharged below 2.9V (top) or 2.5V (bottom). This real-time feedback enforces dynamic dead-time - no fixed delays or external components needed - ensuring zero shoot-through across temperature, voltage, and load variations.
What is the purpose of the UV OUT pin on the LT1162ISW#PBF?
The UV OUT pin on the LT1162ISW#PBF is an open-collector NPN output that actively pulls low when the main supply voltage (V+) drops below the undervoltage lockout threshold (7.8V–9.7V). It signals system-level controllers of supply fault conditions and can be used to disable upstream PWM generators or trigger fault latches - enhancing system safety during brownout events.
Can the LT1162ISW#PBF drive multiple parallel MOSFETs per channel?
Yes, the LT1162ISW#PBF can drive up to five parallel N-channel MOSFETs per channel, as confirmed in the Applications Information section. Gate drive strength (1.5A peak) and thermal design (θJA = 80°C/W) support this configuration; however, individual gate resistors (10Ω–47Ω) are recommended to suppress high-frequency oscillations and ensure uniform turn-on/turn-off across paralleled devices.
LT1162ISW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 4
- 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:
- 24-SOIC
LT1162ISW#PBF FAQ
1.How can I place an order for LT1162ISW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1162ISW#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 LT1162ISW#PBF reliable?
The price and inventory of LT1162ISW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1162ISW#PBF is usually 5 days.
3.What payment methods are accepted for LT1162ISW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1162ISW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1162ISW#PBF?
LT1162ISW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1162ISW#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 LT1162ISW#PBF?
For technical support, including LT1162ISW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1162ISW#PBF requirements.
6.How does Aetrix verify that LT1162ISW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1162ISW#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 LT1162ISW#PBF meets industry standards.
7.What is the process for return or replacement of LT1162ISW#PBF?
All LT1162ISW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1162ISW#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 LT1162ISW#PBF part is unused and in its original packaging.
Return procedure for LT1162ISW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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