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Analog Devices Inc. LT1170HVCQ#TRPBF
- Part No.:
- LT1170HVCQ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LT1170HVCQ#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A DDPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
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Product details
Overview
LT1170HVCQ#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic 5A, 100kHz high-efficiency switching regulator IC in a 5-lead DD (TO-220–like) package. It integrates a 75V breakdown-rated power switch, current-mode PWM controller, oscillator, error amplifier, and protection circuitry. Designed for buck, boost, flyback, inverting, and Cuk topologies, it delivers up to 100W output power with input voltage range 3V to 60V and quiescent current of 6mA - used in industrial DC-DC conversion where wide VIN and robust overload protection are required.
For engineers reviewing the LT1170HVCQ#TRPBF datasheet, LT1170HVCQ#TRPBF pinout, LT1170HVCQ#TRPBF application, or LT1170HVCQ#TRPBF equivalent, key selection criteria include its HV-grade 75V switch breakdown rating, 5A internal switch current limit, flyback-regulated floating output capability, shutdown mode drawing only 50µA, and compatibility with standard 5-pin thermal packages for high-power density designs.
Technical Context
The LT1170HVCQ#TRPBF employs current-mode control architecture with adaptive anti-saturation drive for the integrated NPN power switch, enabling stable operation across wide load currents without efficiency loss. Its dual-error-amplifier structure supports both normal regulation (1.24V reference at FB) and isolated flyback mode (15V–18V flyback reference), with dedicated VC pin for compensation, soft-start, current limit adjustment, and shutdown.
It operates at a fixed 100kHz switching frequency, features internal 2.3V low-dropout bias regulator for core circuitry, and includes built-in overcurrent protection via pulse-by-pulse current limiting. The HV variant extends absolute maximum supply voltage to 60V and switch breakdown voltage to 75V - critical for automotive and industrial 48V bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 5A typical - enables ≥100W output in buck/boost configurations without external MOSFETs |
| Supply Voltage Range | 3V to 60V - supports wide-input industrial, telecom, and automotive battery systems |
| Switch Breakdown Voltage | 75V - ensures safe operation under 48V transient surges and flyback voltage spikes |
| Quiescent Current | 6mA - minimizes no-load power loss in always-on systems |
| Shutdown Current | 50µA - enables ultra-low-power standby in battery-powered equipment |
| Reference Voltage | 1.24V ±2% - provides precise output voltage setting with minimal drift over temperature |
| Switching Frequency | 100kHz - balances EMI performance, inductor size, and efficiency for medium-power designs |
Pinout & Package
LT1170HVCQ#TRPBF uses the Q-package: 5-lead DD (plastic TO-220–compatible outline) with tab connected to GND. Thermal resistance θJA varies between ~25°C/W (2.8 in² copper) and 45°C/W (0.2 in² copper), enabling high-power operation without heatsink in optimized layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Primary DC input connection (3V–60V); powers internal regulator and switch driver |
| VSW | Switch Collector Output | High-current switched node connected to external inductor/diode; rated 75V breakdown |
| GND | Power & Signal Ground | Common return for internal circuitry, switch emitter, and thermal tab (electrically tied) |
| FB | Feedback Input | Senses output voltage divider; selects normal (1.24V) or flyback (15V–18V) regulation mode |
| VC | Error Amplifier Output / Control | Provides compensation node, soft-start ramp, current limit programming, and shutdown activation |
Key Features
| Feature | Design Value |
|---|---|
| Flyback-regulated floating outputs | Enables fully isolated multiple-output supplies without optocouplers or secondary-side sensing |
| Adaptive anti-saturation switch drive | Maintains high efficiency across 0–5A load range by dynamically optimizing base drive to prevent saturation |
| Self-protected against overloads | Pulse-by-pulse current limiting + thermal foldback prevents damage during short-circuit or startup faults |
| Operates in all standard topologies | Single IC supports buck, boost, flyback, forward, inverting, and Cuk - reduces BOM count and design cycle time |
| External synchronization support | Accepts 120–160kHz sync pulses on VC pin for EMI reduction in noise-sensitive systems |
Applications
| Industrial 48V DC-DC Conversion | Isolated Flyback Power Supply |
|---|---|
Use Scenario: Converting 36–60V industrial bus to regulated 5V/12V for PLC I/O modules and sensors. IC Role / Device Role / Timing Role: Primary controller and power switch in non-isolated buck-boost topology with adaptive current-mode regulation. Use Value: Eliminates need for external high-voltage MOSFET and gate driver; 60V max VIN and 75V switch rating tolerate transients per IEC 61000-4-5. | Use Scenario: Generating isolated ±15V op-amp rails and 5V logic from 24V input in test equipment. IC Role / Device Role / Timing Role: Flyback controller with internal 15V–18V reference; regulates primary-side reflected voltage without optocoupler. Use Value: Achieves <1% output regulation across line/load/temperature with fully floating secondaries up to transformer breakdown voltage. |
| Battery Upconverter (12V → 24V) | High-Power Inverting Supply |
Use Scenario: Boosting lead-acid battery voltage (10.5–14.5V) to stable 24V for vehicle-mounted instrumentation. IC Role / Device Role / Timing Role: High-current boost regulator with 5A internal switch and 100kHz fixed-frequency operation. Use Value: Delivers >20A at 24V using single-stage conversion; 6mA quiescent current preserves battery life during idle. | Use Scenario: Generating –12V at 2A from 12V rail for analog signal conditioning in medical devices. IC Role / Device Role / Timing Role: Inverting topology controller with integrated switch and current-mode stability. Use Value: Enables compact, low-noise negative supply with inherent current limiting and no external high-side driver needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3703IGN#PBF | External MOSFET driver; 4–36V input; no integrated switch; higher efficiency at >100kHz | Requires external high-side N-channel MOSFET; better suited for >10A, >200kHz designs | Select when higher efficiency, programmable frequency, or >5A output is required - not drop-in compatible |
| LM5088MHX/NOPB | 5A integrated switch; 4.5–75V input; 1MHz switching; no flyback mode support | Lacks flyback regulation and dual-reference capability; optimized for buck/boost only | Choose for cost-sensitive 1MHz designs needing wider VIN but no isolation - pinout and FB behavior differ |
Compared with LTC3703IGN#PBF and LM5088MHX/NOPB, the LT1170HVCQ#TRPBF uniquely combines 75V switch rating, flyback-mode capability, and self-protected 5A integration in a thermally efficient 5-lead DD package - making it optimal for ruggedized, isolated, or wide-VIN medium-power converters where component count and fault resilience are prioritized.
Availability
LT1170HVCQ#TRPBF is available at Aetrix Electronics and suitable for industrial automation, battery-powered instrumentation, and telecom power systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LT1170HVCQ#TRPBF 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 LT1170 family.
The LT1170 series belongs to Linear's high-power monolithic switching regulator product line, designed specifically for applications demanding integrated 5A switches, wide input voltage tolerance, and multi-topology flexibility without external drivers or complex compensation.
FAQ
What is the maximum input voltage rating for LT1170HVCQ#TRPBF?
The LT1170HVCQ#TRPBF has an absolute maximum supply voltage of 60V and a switch breakdown voltage rating of 75V. This HV grade variant is specifically qualified for operation up to 60V continuous input, exceeding the 40V limit of standard LT1170 variants - making it suitable for 48V industrial and automotive systems with transient headroom.
Does LT1170HVCQ#TRPBF support flyback topology with isolated outputs?
Yes, the LT1170HVCQ#TRPBF supports flyback regulation via its dual-reference architecture: pulling the FB pin below 0.45V activates flyback mode with a 15V–18V reference, enabling regulation of reflected primary voltage. This allows fully floating, transformer-isolated outputs without optocouplers or secondary-side feedback components - confirmed in the device's block diagram and typical application circuits.
What is the thermal performance of LT1170HVCQ#TRPBF in the Q-package?
The LT1170HVCQ#TRPBF in the 5-lead DD (Q) package achieves θJA between 25°C/W (with 2.8 in² of 1 oz copper) and 45°C/W (with 0.2 in²), depending on PCB layout. Its GND-tab construction provides direct thermal path to copper, enabling 100W operation without heatsink in well-designed layouts - verified in thermal characterization data and AN19 efficiency calculations.
Can LT1170HVCQ#TRPBF be synchronized to an external clock?
Yes, the LT1170HVCQ#TRPBF supports external synchronization in the 120–160kHz range by applying narrow (<0.3µs) pulses to the VC pin via an external transistor. This feature reduces EMI in systems with multiple switching regulators - detailed in the "Synchronizing" section of the datasheet with verified waveforms and offset calculations.
What protection features are built into LT1170HVCQ#TRPBF?
The LT1170HVCQ#TRPBF includes pulse-by-pulse current limiting, adaptive anti-saturation drive, thermal foldback (untested but functional), and shutdown mode drawing only 50µA. Its integrated 5A switch and 75V breakdown rating provide intrinsic overvoltage and overload resilience - eliminating need for external current-sense resistors or protection ICs in most medium-power applications.
LT1170HVCQ#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost, Cuk, Flyback, Forward Converter
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.244V
- Voltage - Output (Max):
- 75V (Switch)
- Current - Output:
- 5A (Switch)
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-5
LT1170HVCQ#TRPBF FAQ
1.How can I place an order for LT1170HVCQ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1170HVCQ#TRPBF 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 LT1170HVCQ#TRPBF reliable?
The price and inventory of LT1170HVCQ#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1170HVCQ#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1170HVCQ#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1170HVCQ#TRPBF transactions.
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4.How is shipping managed for LT1170HVCQ#TRPBF?
LT1170HVCQ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1170HVCQ#TRPBF 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 LT1170HVCQ#TRPBF?
For technical support, including LT1170HVCQ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1170HVCQ#TRPBF requirements.
6.How does Aetrix verify that LT1170HVCQ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1170HVCQ#TRPBF 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 LT1170HVCQ#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1170HVCQ#TRPBF?
All LT1170HVCQ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1170HVCQ#TRPBF, 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 LT1170HVCQ#TRPBF part is unused and in its original packaging.
Return procedure for LT1170HVCQ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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