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Analog Devices Inc. LT3460ESC6-1#TRPBF
- Part No.:
- LT3460ESC6-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LT3460ESC6-1#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 180MA SC70
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT3460ESC6-1#TRPBF from Analog Devices (formerly Linear Technology) is a 650kHz fixed-frequency step-up DC/DC converter in SC70-6 package, featuring an integrated 180mA switch, 1.255V feedback reference, and 2.5V–16V input range. It delivers up to 36V output voltage and supports 12V@70mA conversion from 5V, targeting low-current bias supplies in imaging and telecom systems.
For engineers reviewing the LT3460ESC6-1#TRPBF datasheet, LT3460ESC6-1#TRPBF pinout, LT3460ESC6-1#TRPBF application, or LT3460ESC6-1#TRPBF equivalent, key selection criteria include switching frequency (650kHz), output voltage capability (up to 36V), quiescent current (1mA), thermal performance in SC70 (θJA = 270°C/W on ground plane), and shutdown current (<1μA).
Technical Context
The LT3460ESC6-1#TRPBF employs constant-frequency peak current-mode control with internal 1.255V reference and ramp compensation for stable regulation across line and load variations. Its 650kHz oscillator enables compact external components while maintaining predictable EMI profile.
It integrates a 38V-rated NPN switch with 220mV typical VCE(SAT) at 100mA and features soft-start via RC-filtered SHDN pin. The feedback loop uses internal RC/CC compensation but requires optional feed-forward capacitor (CF) for phase margin optimization in most boost configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 650kHz - Enables use of small inductors (e.g., 22μH) and ceramic capacitors; reduces output ripple filtering complexity. |
| 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. |
| Max Output Voltage | 36V - Suitable for CCD bias, TFT-LCD gate drivers, and XDSL line drivers requiring high-voltage rails. |
| Integrated Switch Current Limit | 180mA - Defines maximum deliverable load current; limits inductor peak current to prevent saturation under transient loads. |
| Feedback Reference Voltage | 1.255V ±20mV - Sets output voltage via resistor divider (VOUT = 1.255V × (1 + R1/R2)); tight tolerance enables accurate regulation. |
| Quiescent Current | 1mA - Minimizes standby power loss in battery-powered devices such as portable medical sensors and digital cameras. |
| Shutdown Current | <1μA - Ensures near-zero power draw during system sleep modes; critical for long-term battery operation. |
Pinout & Package
LT3460ESC6-1#TRPBF is housed in a 6-lead plastic SC70 package (JEDEC MO-220 variant, EIAJ SC-70), measuring 2.00mm × 1.25mm × 0.95mm (max height), with exposed pad not present. Pin 1 is marked by a bar; recommended solder pad layout per IPC standards ensures thermal and electrical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node | Connects to inductor and catch diode anode; high dv/dt node requiring minimal trace length to reduce EMI and switching losses. |
| GND (Pin 2) | Power Ground | Main return path for switch current and IC ground; must tie directly to local ground plane for stable operation and thermal dissipation. |
| FB (Pin 3) | Feedback Input | Senses output voltage via resistor divider; high-impedance node (5–80nA bias) sensitive to noise-keep trace short and away from SW. |
| SHDN (Pin 4) | Enable/Soft-Start Control | Active-high logic input; >1.5V enables device; ≤0.4V disables. RC filter (e.g., 47kΩ/47nF) provides controlled startup ramp. |
| VIN (Pin 6) | Input Supply | Power input (2.5–16V); requires local 4.7μF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise. |
| NC (Pin 5) | No-Connect | Not internally bonded; recommended to connect to GND for improved thermal conduction and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 650kHz Fixed Switching Frequency | Enables consistent EMI spectrum and predictable filter design using sub-3mm inductors and 0402/0603 ceramics. |
| 180mA Integrated Switch with 38V Rating | Supports output voltages up to 36V without external FET; eliminates board space and BOM cost of discrete switch and driver. |
| 1.255V Precision Feedback Reference | Allows accurate output setting across temperature (±20mV over –40°C to 85°C); simplifies resistor selection for stable bias rails. |
| Low 1mA Quiescent Current | Extends battery life in always-on sensor nodes and portable diagnostics equipment where continuous operation is required. |
| SC70-6 Package with Thermal Optimization | Provides 270°C/W θJA on ground plane-superior thermal resistance vs. SOT-23-enabling higher ambient operation in compact layouts. |
Applications
| Digital Camera CCD Bias Supply | XDSL Line Driver Power |
|---|---|
Use Scenario: Generating 18V–30V bias for CCD image sensors in compact point-and-shoot cameras powered by single Li-ion cells. IC Role / Device Role / Timing Role: Step-up regulator providing regulated high-voltage rail; operates in discontinuous conduction mode with 650kHz switching to minimize size. Use Value: Enables full-frame CCD operation from 2.7–4.2V input with <1mA quiescent draw, extending capture time between charges. | Use Scenario: Supplying 36V for analog front-end line drivers in ADSL/VDSL modems operating from 12V system rail. IC Role / Device Role / Timing Role: High-voltage boost converter delivering stable 36V at 4mA; leverages 38V switch rating and low-noise constant-frequency operation. Use Value: Eliminates need for external high-voltage DC/DC stage, reducing bill-of-materials and PCB area in space-constrained CPE designs. |
| TFT-LCD Gate Driver Supply | Medical Diagnostic Sensor Bias |
Use Scenario: Providing +12V and –10V (with external inverter) gate drive rails for active-matrix LCD panels in portable ultrasound displays. IC Role / Device Role / Timing Role: Primary positive boost stage feeding charge-pump inverter; configured for 12V@70mA with 22μH inductor and 1μF output cap. Use Value: Achieves >75% efficiency at 40mA load from 3.3V input, enabling crisp display contrast without thermal throttling in handheld units. | Use Scenario: Generating precise 12V bias for photomultiplier tube (PMT) or avalanche photodiode (APD) front-ends in portable blood analyzers. IC Role / Device Role / Timing Role: Low-noise, low-quiescent boost regulator with feed-forward capacitor (22pF) ensuring >60° phase margin for stable high-gain analog signal chains. Use Value: Delivers clean 12V rail with <10mVpp ripple, preserving signal-to-noise ratio in sub-picoamp current measurement circuits. |
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 |
|---|---|---|---|
| LT3461ESC6#TRPBF | 1.3MHz switching, 300mA switch, integrated Schottky diode, same SC70-6 package | Better suited for higher-current, higher-efficiency 5V→12V rails; no external diode required | Select LT3461ESC6#TRPBF when output current exceeds 70mA or board space prohibits external diode placement. |
| LT1615ESC6#TRPBF | Constant off-time control, 300mA switch, 1.2V–15V input, 20μA quiescent current | Superior light-load efficiency and wider VIN range; less predictable EMI due to variable frequency | Choose LT1615ESC6#TRPBF for ultra-low-power battery monitoring systems needing sub-10μA standby current. |
Compared with LT3460ESC6-1#TRPBF, LT3461ESC6#TRPBF offers higher current and integration at the cost of increased quiescent draw (2.8mA), while LT1615ESC6#TRPBF trades fixed-frequency predictability for better efficiency below 10mA load-critical for intermittent-sensing applications.
Availability
LT3460ESC6-1#TRPBF is available at Aetrix Electronics and suitable for digital camera CCD bias supply, XDSL line driver power, TFT-LCD gate driver supply, and medical diagnostic sensor bias requiring stable component supply across industrial temperature range (–40°C to 85°C).
Supply support for LT3460ESC6-1#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 its legacy precision analog and power management portfolio with rigorous qualification and long-term product support.
The LT3460 family was designed specifically for compact, high-voltage bias generation in imaging, telecom, and portable instrumentation-emphasizing SC70/DFN footprint, low IQ, and robust 38V switch capability.
FAQ
What is the maximum output voltage achievable with the LT3460ESC6-1#TRPBF?
The LT3460ESC6-1#TRPBF supports output voltages up to 36V, limited by its 38V-rated internal switch. This is confirmed in the Absolute Maximum Ratings table and validated in typical applications like the 12V→36V and 5V→36V boost converters shown in the datasheet. Operation beyond 36V risks exceeding VSW rating and may cause permanent damage.
Does the LT3460ESC6-1#TRPBF require an external diode, and if so, what type is recommended?
Yes, the LT3460ESC6-1#TRPBF requires an external Schottky diode connected between SW and VOUT. The datasheet specifies Central Semiconductor CMDSH2-3 (30V, 200mA) or equivalent in all reference designs. A low-forward-voltage, fast-recovery Schottky with VF ≤ 0.4V and IF(AV) ≥ 100mA is essential to maintain efficiency and prevent reverse recovery losses.
Can the LT3460ESC6-1#TRPBF be used in a SEPIC configuration?
Yes, the LT3460ESC6-1#TRPBF can be configured as a SEPIC converter, as demonstrated in Figure TA06 of the datasheet (5V to 5V SEPIC). Its current-mode architecture and 38V switch rating accommodate the coupled-inductor topology. However, external compensation and careful layout are required to ensure stability, as the internal compensation network is optimized for boost only.
What is the thermal resistance (θJA) of the LT3460ESC6-1#TRPBF in its SC70-6 package?
The LT3460ESC6-1#TRPBF has a junction-to-ambient thermal resistance of 270°C/W when mounted on a PCB with a ground plane, per the SC6 package data on page 11 of the datasheet. In free air, θJA is 400°C/W. These values assume proper soldering of Pin 5 (NC) to ground and adherence to recommended pad layout dimensions.
How does the SHDN pin function on the LT3460ESC6-1#TRPBF, and can it be used for soft-start?
The SHDN pin on the LT3460ESC6-1#TRPBF is an active-high enable input that also provides built-in soft-start functionality. When pulled above 1.5V, the device enables and ramps output voltage gradually. Adding an RC filter (e.g., 47kΩ and 47nF) between SHDN and GND extends the startup time, limiting inrush current and preventing overshoot-confirmed in Typical Application TA02.
LT3460ESC6-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- SC-70-6
LT3460ESC6-1#TRPBF FAQ
1.How can I place an order for LT3460ESC6-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3460ESC6-1#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 LT3460ESC6-1#TRPBF reliable?
The price and inventory of LT3460ESC6-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3460ESC6-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3460ESC6-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3460ESC6-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3460ESC6-1#TRPBF?
LT3460ESC6-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3460ESC6-1#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 LT3460ESC6-1#TRPBF?
For technical support, including LT3460ESC6-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3460ESC6-1#TRPBF requirements.
6.How does Aetrix verify that LT3460ESC6-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3460ESC6-1#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 LT3460ESC6-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3460ESC6-1#TRPBF?
All LT3460ESC6-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3460ESC6-1#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 LT3460ESC6-1#TRPBF part is unused and in its original packaging.
Return procedure for LT3460ESC6-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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