My Inquiry
My Account
Analog Devices Inc. LT1766EGN-5#TRPBF
- Part No.:
- LT1766EGN-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1766EGN-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 1.5A 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1766EGN-5#TRPBF from Analog Devices (formerly Linear Technology) is a 5V fixed-output, 200kHz monolithic buck switching regulator with 1.5A peak switch current, 5.5V–60V input range, and integrated 0.2Ω NPN power switch. It delivers regulated 5V output for industrial power supplies, battery chargers, and distributed power systems requiring high-voltage tolerance and thermal robustness in SSOP packaging.
For engineers reviewing the LT1766EGN-5#TRPBF datasheet, LT1766EGN-5#TRPBF pinout, LT1766EGN-5#TRPBF application, or LT1766EGN-5#TRPBF equivalent, key selection criteria include its fixed 5V output, 16-pin SSOP package with exposed ground pad, 25μA shutdown current, cycle-by-cycle current limiting, and external synchronization capability from 228kHz to 700kHz.
Technical Context
The LT1766EGN-5#TRPBF implements current-mode control with an internal 200kHz oscillator, enabling fast transient response and stable loop behavior across wide input and load variations. Its architecture integrates a saturating NPN switch driven by a BOOST pin voltage higher than VIN, achieving low conduction loss equivalent to a 0.2Ω FET while maintaining 1.5A peak current over full duty cycle range.
It features dual SHDN thresholds (2.38V UVLO and 0.4V deep shutdown), FB/SENSE pin functionality optimized for fixed 5V operation (with 4.90V–5.10V SENSE voltage tolerance), and patented circuitry that sustains peak switch current regardless of duty cycle-critical for high-step-down ratios at low output voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±2% (SENSE pin tied directly to VOUT; no external divider required) |
| Input Voltage Range | 5.5V to 60V - supports 24V/48V industrial rails and automotive cold-crank transients |
| Switch Current Limit | 1.5A peak - sustained across full duty cycle, enabling reliable operation down to ~8% duty (5V/60V) |
| Switch On-Resistance | 0.2Ω typical - achieved via BOOST-driven saturation, minimizing conduction loss at high VIN |
| Shutdown Current | 25μA max - enables ultra-low-power standby in battery-backed systems |
| Switching Frequency | 200kHz fixed (±12%) - balances EMI, inductor size, and efficiency; externally synchronizable 228–700kHz |
| Thermal Rating | Junction temperature range: –40°C to 125°C - validated for continuous operation in sealed industrial enclosures |
Pinout & Package
LT1766EGN-5#TRPBF uses a 16-lead plastic SSOP package (GN grade) with four corner GND pins and internal exposed ground plane connection (Pin 17 is GND, soldered to PCB). Thermal resistance θJA = 85°C/W, θJC (Pin 8) = 25°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 8, 9, 16) | Power and signal reference ground | Multiple low-inductance paths reduce ground bounce; must connect to PCB ground plane for thermal and regulation stability |
| SW (Pin 2) | Emitter of internal NPN power switch | Drives inductor; swings from –0.8V (clamped) to VIN during operation; requires catch diode and low-L layout |
| VIN (Pin 4) | Collector of internal NPN switch + bias source | Supplies control circuitry when BIAS pin is unconnected; high dI/dt node - demands short, low-inductance input path |
| BOOST (Pin 6) | Boost capacitor drive node | Generates >VIN voltage to saturate NPN switch; requires external capacitor+diode network (e.g., 100V ceramic + 1N4148W) |
| BIAS (Pin 10) | Efficiency-optimizing auxiliary supply input | When tied to VOUT ≥3V, shifts bias current from VIN to VOUT, improving efficiency at high VIN/light loads |
| VC (Pin 11) | Error amplifier output / current limit comparator input | Compensation node (typical 0.9–2.1V swing); can be clamped to force shutdown or override loop dynamics |
| FB/SENSE (Pin 12) | Fixed-output feedback sense input | Internally connected to 5V output; monitors VOUT directly; triggers foldback below 0.8V (freq) and 0.6V (current) |
| SYNC (Pin 14) | External clock synchronization input | Logic-level compatible (1.5–2.2V min); accepts 228–700kHz square wave; disables foldback when active |
| SHDN (Pin 15) | Enable/disable control with dual thresholds | 2.38V = UVLO start-up; 0.4V = deep shutdown; open-circuit defaults to enabled via internal bias current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.2Ω NPN switch with BOOST drive | Enables high-efficiency buck conversion at 60V input without external MOSFET or gate driver |
| Fixed 5V output with internal SENSE divider | Eliminates external resistor network, reducing BOM count and layout sensitivity for standard 5V rail generation |
| Cycle-by-cycle current limiting | Provides inherent short-circuit protection without external sensing components or delay-compromised ICs |
| Frequency and current foldback below 0.8V/0.6V on SENSE | Reduces power dissipation in IC, diode, and inductor during output shorts - critical for reliability in unattended systems |
| Thermally enhanced SSOP with exposed GND pad | Supports 125°C continuous junction operation with standard PCB copper area; θJA = 85°C/W confirmed |
Applications
| Industrial Power Supply | Battery Charger Control |
|---|---|
Use Scenario: Generating isolated or non-isolated 5V logic rail from 24V/48V factory floor DC bus with voltage spikes up to 60V. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5V at up to 1.5A with built-in overcurrent and thermal protection. Use Value: Eliminates need for external high-voltage MOSFET and gate driver; 25μA shutdown enables energy-efficient standby in PLC I/O modules. | Use Scenario: Charging lead-acid or LiFePO₄ batteries from variable solar or vehicle alternator sources (12–60V input). IC Role / Device Role / Timing Role: Constant-voltage stage regulator supplying 5V to charge controller MCU and sensing circuitry. Use Value: Wide 5.5–60V input accommodates cold-crank and load-dump events; foldback protection prevents thermal runaway during battery fault conditions. |
| Distributed Power System | Automotive Body Control Module |
Use Scenario: Local 5V rail generation at remote nodes in telecom or data center backplanes powered from 48V intermediate bus. IC Role / Device Role / Timing Role: Point-of-load (POL) buck converter with SYNC input synchronized to system clock to minimize EMI interference. Use Value: 200kHz fixed frequency + external sync capability allows deterministic noise placement; SSOP package fits dense board layouts. | Use Scenario: Powering microcontrollers, CAN transceivers, and sensors in under-hood ECUs exposed to –40°C to 125°C ambient. IC Role / Device Role / Timing Role: Main 5V supply for safety-critical body electronics with guaranteed operation across full automotive temperature range. Use Value: –40°C to 125°C junction rating and 2.38V UVLO ensure reliable startup after engine-off soak; GND pin layout minimizes ground shift in noisy environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3631EMSE-5#PBF | 42V max input, 5V fixed, 1.2A, 3mm × 4mm MSOP; no BOOST pin; uses integrated MOSFETs | Lower voltage rating; smaller footprint; no external boost diode/cap required | Preferred for space-constrained 24V systems where 60V tolerance is unnecessary |
| LM5164QDRCRQ1 | 65V max input, 5V adjustable/fixed, 1A, 10-pin WSON; requires external MOSFET; AEC-Q100 qualified | Automotive-grade qualification; lower current; needs external high-side switch | Required for new automotive designs needing AEC-Q100 compliance and higher VIN margin |
Compared with LTC3631EMSE-5#PBF and LM5164QDRCRQ1, the LT1766EGN-5#TRPBF uniquely combines 60V input tolerance, integrated 1.5A NPN switch with BOOST drive, fixed 5V output, and SSOP thermal performance - making it optimal for ruggedized industrial 5V POL applications where layout simplicity and transient robustness outweigh footprint or automotive qualification needs.
Availability
LT1766EGN-5#TRPBF is available at Aetrix Electronics and suitable for industrial power supplies, battery charger control circuits, and distributed power systems requiring stable component supply with long-term lifecycle support.
Supply support for LT1766EGN-5#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LT1766 family was designed by Linear Technology specifically for high-input-voltage, thermally demanding buck conversion applications - emphasizing integrated power switch robustness, wide operating temperature range, and simplified external component count.
FAQ
What is the maximum input voltage rating for the LT1766EGN-5#TRPBF?
The LT1766EGN-5#TRPBF has an absolute maximum input voltage (VIN) rating of 60V, with recommended operating range from 5.5V to 60V. This enables direct use in 48V industrial systems and automotive applications experiencing load dump transients. Exceeding 60V risks permanent damage per Absolute Maximum Ratings.
Does the LT1766EGN-5#TRPBF require external feedback resistors to set the output voltage?
No. The LT1766EGN-5#TRPBF is the fixed 5V variant - it contains internal resistor dividers connecting the SENSE pin to the regulated output. The FB/SENSE pin (Pin 12) is used solely as a direct output voltage monitor, eliminating external resistor networks and associated tolerance errors.
How does the BOOST pin function in the LT1766EGN-5#TRPBF?
The BOOST pin (Pin 6) provides a voltage higher than VIN to fully saturate the internal NPN power switch, reducing its effective on-resistance to 0.2Ω. It requires an external bootstrap capacitor and diode (e.g., 100V ceramic + 1N4148W) connected between BOOST and SW - critical for achieving specified efficiency and 1.5A current capability.
What are the two shutdown thresholds on the SHDN pin of the LT1766EGN-5#TRPBF?
The SHDN pin (Pin 15) has two distinct thresholds: 2.38V (typical) initiates undervoltage lockout (UVLO), disabling switching until VIN stabilizes; 0.4V (typical) forces deep micropower shutdown, reducing supply current to 25μA. Both thresholds are internally trimmed and guaranteed over temperature.
Can the LT1766EGN-5#TRPBF be synchronized to an external clock?
Yes. The SYNC pin (Pin 14) accepts logic-level square waves from 228kHz to 700kHz with 10%–90% duty cycle. When synchronized, the internal oscillator locks to the external frequency, enabling EMI reduction through deterministic noise placement in dense multi-regulator systems.
LT1766EGN-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1766EGN-5#TRPBF FAQ
1.How can I place an order for LT1766EGN-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1766EGN-5#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 LT1766EGN-5#TRPBF reliable?
The price and inventory of LT1766EGN-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1766EGN-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1766EGN-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1766EGN-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1766EGN-5#TRPBF?
LT1766EGN-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1766EGN-5#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 LT1766EGN-5#TRPBF?
For technical support, including LT1766EGN-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1766EGN-5#TRPBF requirements.
6.How does Aetrix verify that LT1766EGN-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1766EGN-5#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 LT1766EGN-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1766EGN-5#TRPBF?
All LT1766EGN-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1766EGN-5#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 LT1766EGN-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1766EGN-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1766EGN-5#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
