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Analog Devices Inc. LT3460EDC-1#TRPBF
- Part No.:
- LT3460EDC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT3460EDC-1#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 180MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
LT3460EDC-1#TRPBF from Analog Devices (formerly Linear Technology) is a 650kHz fixed-frequency step-up DC/DC converter with integrated 180mA switch, 1.255V feedback reference, and shutdown control-designed for compact 5V-to-12V or Li-ion-to-18V bias supplies in space-constrained portable electronics.
For engineers reviewing the LT3460EDC-1#TRPBF datasheet, LT3460EDC-1#TRPBF pinout, LT3460EDC-1#TRPBF application, or LT3460EDC-1#TRPBF equivalent, this page delivers verified package mapping (6-lead 2mm × 2mm DFN), confirmed switching frequency (650kHz), validated current limit (180mA), exact feedback voltage (1.255V), and real-world efficiency curves at 70mA load.
Technical Context
The LT3460EDC-1#TRPBF employs peak current-mode control with a 650kHz oscillator, internal 1.255V reference, and rail-to-rail error amplifier to regulate output voltage via external resistor divider on FB. Its constant-frequency architecture ensures predictable EMI and simplified filtering.
It integrates a 38V-rated NPN switch with 220mV typical VCE(SAT) at 100mA, supports input voltages from 2.5V to 16V, and achieves <1μA shutdown current. The exposed thermal pad (Pin 7) must be soldered to PCB ground for thermal management and electrical stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 650kHz - Enables use of small 22μH inductors and low-profile ceramic capacitors; reduces output ripple and simplifies EMI filtering. |
| Feedback Reference Voltage | 1.255V - Sets output via R1/R2 divider: VOUT = 1.255V × (1 + R1/R2); tolerance ±20mV over –40°C to 85°C. |
| Integrated Switch Current Limit | 180mA - Limits peak inductor current to prevent saturation and thermal runaway during startup or overload. |
| Input Voltage Range | 2.5V to 16V - Supports single-cell Li-ion (2.7–4.2V), 3.3V/5V rails, and industrial 12V inputs without pre-regulation. |
| Shutdown Current | <1μA - Enables battery-backed systems to retain >99% charge over months when disabled. |
| Output Voltage Capability | Up to 36V - Achieved with external diode and proper layout; suitable for CCD bias, TFT-LCD gate drivers, and XDSL line drivers. |
| Quiescent Current | 1mA - Maintains high light-load efficiency in always-on sensor nodes and medical diagnostics equipment. |
Pinout & Package
LT3460EDC-1#TRPBF uses a 6-lead, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 7 = GND). The SC70 and TSOT-23 variants are not pin-compatible; this DFN variant has unique pin numbering and NC placements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback Input | Connects to resistor divider tap; 1.255V reference sets regulated output; sensitive node-minimize trace area and avoid noise coupling. |
| Pin 2 (NC) | No-Connect | Internally unconnected; tie to GND for improved thermal dissipation and reduced EMI susceptibility. |
| Pin 3 (SW) | Switch Node | Drives external inductor/diode; high dv/dt node-keep trace short and away from sensitive analog paths. |
| Pin 4 (VIN) | Input Supply | Accepts 2.5V–16V; requires local 4.7μF ceramic bypass capacitor placed adjacent to pin. |
| Pin 5 (NC) | No-Connect | Internally unconnected; tie to GND for mechanical stability and thermal conduction. |
| Pin 6 (SHDN) | Shutdown Control | Active-high logic: ≥1.5V enables converter; ≤0.4V disables it and reduces IQ to <1μA; RC filter enables soft-start. |
| Pin 7 (Exposed Pad) | Thermal & Electrical Ground | Mandatory GND connection; soldered directly to PCB ground plane for thermal relief (θJA = 102°C/W) and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 650kHz switching frequency | Enables consistent EMI profile and predictable output ripple-critical for noise-sensitive imaging and medical applications. |
| 180mA integrated NPN switch with 38V rating | Supports up to 36V output without external transistor; VCE(SAT) ≤350mV ensures minimal conduction loss at full load. |
| 1.255V precision feedback reference | Delivers ±1.6% output accuracy over temperature; eliminates need for trimming in production calibration. |
| <1μA shutdown current | Extends battery life in standby mode-verified across –40°C to 85°C ambient range. |
| DFN package with exposed thermal pad | Provides 3× better thermal performance vs. SC70; enables 70mA continuous output in 25mm² footprint. |
Applications
| Digital Camera CCD Bias Supply | TFT-LCD Gate Driver Supply |
|---|---|
Use Scenario: Generating stable 18V bias from a 3.7V Li-ion cell to power CCD image sensors in compact digital cameras. IC Role / Device Role / Timing Role: Step-up regulator providing regulated high-voltage rail with low noise and fast transient response to support pixel readout timing. Use Value: Achieves 82% efficiency at 200μA load (LT3460EDC-1#TRPBF TA08), enabling >10-hour standby with minimal heat rise in sealed enclosures. |
Use Scenario: Supplying 20–25V gate drive for TFT-LCD source/gate drivers in handheld displays. IC Role / Device Role / Timing Role: High-voltage boost converter delivering clean, ripple-free bias under dynamic display refresh loads. Use Value: 650kHz operation allows use of 10μH inductor and 4.7μF output cap-reducing board area by 40% vs. lower-frequency alternatives. |
| XDSL Line Power Supply | Medical Diagnostic Equipment Bias Rail |
Use Scenario: Providing isolated 36V auxiliary supply for DSL line drivers in residential gateways and modems. IC Role / Device Role / Timing Role: Primary-side boost controller generating high-voltage rail before isolation transformer or post-regulator stage. Use Value: 38V switch rating and 85% duty cycle capability enable direct 12V-to-36V conversion without cascaded stages-reducing BOM count and failure points. |
Use Scenario: Generating precise ±15V or +30V bias for analog front-end amplifiers and ADC reference buffers in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Low-noise, thermally robust DC/DC converter powering critical signal-chain components. Use Value: Exposed-pad DFN package maintains junction temperature <85°C at 70mA load-ensuring long-term reliability in sealed medical housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3460ESC6-1#TRPBF | Same IC die, SC70-6 package (no exposed pad); θJA = 270°C/W vs. 102°C/W; 650kHz, 180mA switch. | Limited to ≤40mA continuous output in still-air; unsuitable for sustained 70mA loads or high-ambient environments. | Select only if board space prohibits DFN footprint and thermal budget allows derating. |
| LT3461AEDC#TRPBF | Higher 3MHz switching frequency; integrated Schottky diode; 300mA switch; 38V rating; same DFN package. | Enables smaller 4.7μH inductor and eliminates external diode-reducing solution size by ~30% but increasing quiescent current to 2.8mA. | Choose when minimizing bill-of-materials and board area outweighs light-load efficiency concerns. |
Compared with LT3460ESC6-1#TRPBF, the LT3460EDC-1#TRPBF delivers 2.6× better thermal performance and full 70mA capability; versus LT3461AEDC#TRPBF, it trades higher efficiency at light loads and simpler external component count for lower switching frequency and no integrated diode.
Availability
LT3460EDC-1#TRPBF is available at Aetrix Electronics and suitable for digital camera CCD bias, TFT-LCD gate driver, XDSL line power, and medical diagnostic equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LT3460EDC-1#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, datasheet archives, and application engineering for legacy Linear parts including the LT3460 family.
The LT3460 series was designed specifically for compact, high-voltage bias generation in portable imaging, telecom, and medical systems-emphasizing low quiescent current, small external components, and robust thermal packaging.
FAQ
What is the maximum output voltage achievable with the LT3460EDC-1#TRPBF?
The LT3460EDC-1#TRPBF supports output voltages up to 36V, as confirmed by its 38V-rated internal switch and Absolute Maximum Rating for SW pin voltage. This is demonstrated in the 12V-to-36V and 5V-to-36V typical applications (Figures TA04 and TA05), where external diodes and proper layout enable reliable high-voltage operation without additional active components.
Does the LT3460EDC-1#TRPBF require an external diode, and why?
Yes, the LT3460EDC-1#TRPBF requires an external Schottky diode-unlike later variants such as LT3461A. Its internal NPN switch lacks an integrated diode path, so an external diode (e.g., CMDSH2-3 or PMEG2010) is necessary to complete the boost topology's current path during switch-off periods and prevent reverse current flow.
How does the LT3460EDC-1#TRPBF differ from the LT3460ES5#TRPBF?
The LT3460EDC-1#TRPBF is the -1 variant in DFN package (6-lead, 2mm × 2mm) with 650kHz switching and 180mA switch, while LT3460ES5#TRPBF is the base variant in TSOT-23 package (5-lead) with 1.3MHz switching and 300mA switch. They are not pin-compatible, have different thermal characteristics, and serve distinct current/voltage trade-off requirements.
Can the LT3460EDC-1#TRPBF operate from a single-cell Li-ion battery?
Yes-the LT3460EDC-1#TRPBF operates from 2.5V to 16V input, fully covering the 2.7V–4.2V discharge range of a single Li-ion cell. The "Li-Ion to 18V Step-Up Converter" application (Figure TA08) explicitly validates this use case, delivering 18V at 200μA with >80% efficiency across the battery voltage range.
What is the purpose of the NC pins (Pins 2 and 5) on the LT3460EDC-1#TRPBF?
Pins 2 and 5 on the LT3460EDC-1#TRPBF are true no-connects-unbonded internally. Per the datasheet, they should be tied to GND to improve thermal conduction from the die through the package body and reduce EMI susceptibility by lowering parasitic impedance to ground.
LT3460EDC-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.255V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 180mA (Switch)
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LT3460EDC-1#TRPBF FAQ
1.How can I place an order for LT3460EDC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3460EDC-1#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 LT3460EDC-1#TRPBF reliable?
The price and inventory of LT3460EDC-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3460EDC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3460EDC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3460EDC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3460EDC-1#TRPBF?
LT3460EDC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3460EDC-1#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 LT3460EDC-1#TRPBF?
For technical support, including LT3460EDC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3460EDC-1#TRPBF requirements.
6.How does Aetrix verify that LT3460EDC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3460EDC-1#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 LT3460EDC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3460EDC-1#TRPBF?
All LT3460EDC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3460EDC-1#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 LT3460EDC-1#TRPBF part is unused and in its original packaging.
Return procedure for LT3460EDC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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