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Analog Devices Inc. LT3460ESC6#TRM
- Part No.:
- LT3460ESC6#TRM
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LT3460ESC6#TRM.pdf
- Description:
- IC REG BST SEPIC ADJ 300MA SC70
- Quantity:
- Payment:
- Shipping:
Inventory:3,086
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Product details
Overview
LT3460ESC6#TRM from Analog Devices (formerly Linear Technology) is a 1.3 MHz fixed-frequency step-up DC/DC converter in SC70-6 package, featuring a 300 mA integrated switch, 2.5 V to 16 V input range, and up to 36 V output capability. It delivers 12 V at 70 mA from a 5 V supply and is used in CCD bias supplies, TFT-LCD bias generation, and portable medical diagnostic equipment.
For engineers reviewing the LT3460ESC6#TRM datasheet, LT3460ESC6#TRM pinout, LT3460ESC6#TRM application, or LT3460ESC6#TRM equivalent, key selection criteria include switching frequency stability, integrated switch current rating, feedback reference voltage accuracy, shutdown current <1 µA, and SC70-6 thermal performance with θJA = 270°C/W on ground plane.
Technical Context
The LT3460ESC6#TRM employs constant-frequency current-mode control with an internal 1.255 V reference and ramp-compensated PWM comparator. Its peak-current sensing and error amplifier drive precise output regulation across line and load variations.
It integrates a 38 V-rated NPN switch with 320 mV typical VCE(SAT) at 250 mA, supports soft-start via RC filtering on SHDN, and uses external resistor divider feedback for programmable output voltage (VOUT = 1.255 V × (1 + R1/R2)).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3 MHz - enables use of small 22 µH inductors and low-profile ceramic capacitors; reduces EMI filtering burden. |
| Input Voltage Range | 2.5 V to 16 V - supports single Li-ion, dual alkaline, or industrial 12 V rail inputs without pre-regulation. |
| Max Output Voltage | 36 V - suitable for high-voltage analog bias rails including CCD, photomultiplier, and TFT-LCD gate drivers. |
| Integrated Switch Current | 300 mA - delivers up to 70 mA at 12 V (or 4 mA at 36 V) with margin for transient loads and efficiency derating. |
| Feedback Reference | 1.255 V ±1.6% - sets output accuracy; enables precise VOUT programming with standard 1% resistors. |
| Quiescent Current | 1 mA - minimizes standby power loss in battery-powered systems requiring extended sleep modes. |
| Shutdown Current | <1 µA - ensures negligible battery drain during system off-state; critical for portable medical and imaging devices. |
Pinout & Package
LT3460ESC6#TRM is housed in a 6-lead plastic SC70 package (JEDEC MO-220 variant), 2.0 mm × 1.25 mm × 0.9 mm, with exposed pad not present (unlike DFN variants). Thermal resistance is 270°C/W on PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Collector | Connects to inductor/diode node; high di/dt path - must be short, low-inductance trace to minimize EMI and switching losses. |
| GND (Pin 2) | Power Ground | Main return path for switch current and IC bias; tie directly to local ground plane with multiple vias for low impedance. |
| FB (Pin 3) | Feedback Input | Senses output via resistor divider; high-impedance node - keep trace short and away from noisy signals to avoid regulation instability. |
| SHDN (Pin 4) | Enable/Soft-Start Control | Logic-level enable (≥1.5 V = ON); RC filter here controls startup slew rate and reduces inrush current. |
| VIN (Pin 6) | Input Supply | Primary power input; requires local 4.7 µF ceramic bypass capacitor placed adjacent to pin for high-frequency decoupling. |
| NC (Pin 5) | No-Connect | Internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency current-mode control | Ensures predictable EMI spectrum and stable loop response across input/output conditions; simplifies filter design. |
| 38 V switch rating | Supports boost topologies up to 36 V output without external HV transistor - reduces BOM count and board area. |
| Internal 1.255 V reference | Enables accurate output setting with minimal external components; eliminates need for precision external reference IC. |
| Low 1 mA quiescent current | Extends battery life in always-on portable instruments; maintains regulation during light-load conditions without burst mode noise. |
| SC70-6 footprint compatibility | Offers same board space as SOT-23-5 but adds NC pin for grounding - improves thermal performance over TSOT-23 variant. |
Applications
| CCD Bias Supply | TFT-LCD Gate Driver Bias |
|---|---|
Use Scenario: Generating stable +15 V to +30 V bias for charge-coupled device (CCD) image sensors in portable endoscopes and digital radiography systems. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage analog supply; operates continuously during image capture with tight ripple tolerance. Use Value: Delivers 300 mA switch current headroom for fast CCD reset transients; 1.3 MHz switching avoids interference with pixel clock harmonics. | Use Scenario: Powering positive and negative gate driver rails (e.g., +18 V / –10 V) for active-matrix LCD panels in handheld ultrasound and point-of-care monitors. IC Role / Device Role / Timing Role: High-voltage boost stage feeding inverting buck-boost or charge-pump stages; requires low-noise, stable output under dynamic load steps. Use Value: 1.255 V reference accuracy ensures consistent VOUT across temperature; SC70-6 package fits constrained display module layouts. |
| Digital Camera Flash Charging | Portable Medical Diagnostic Equipment |
Use Scenario: Charging high-voltage capacitor (200–300 V) for xenon flash tubes in compact digital cameras and inspection tools. IC Role / Device Role / Timing Role: Primary boost controller in multi-stage flyback or resonant charging circuit; enabled only during flash prep phase. Use Value: <1 µA shutdown current prevents battery drain between shots; 38 V switch rating allows direct interface to intermediate bus (e.g., 12 V → 24 V stage). | Use Scenario: Providing isolated analog bias for front-end signal conditioning in portable ECG, EEG, and pulse oximetry units. IC Role / Device Role / Timing Role: Local 5 V or 12 V supply generator from main Li-ion battery; operates in low-power monitoring mode with periodic wake-ups. Use Value: 1 mA quiescent current extends operational time between charges; SC70-6 package meets IPC-7351B density requirements for miniaturized medical PCBs. |
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#TRMPBF | Integrates Schottky diode; 1.3 MHz/3 MHz dual-frequency option; 38 V switch; 300 mA current limit. | Reduces external component count (no external diode); higher frequency option improves light-load efficiency. | Select when minimizing bill-of-materials and board space is prioritized over absolute lowest cost per unit. |
| LTC3400ES5#TRPBF | Synchronous rectification; 1.2 MHz; 600 mA switch; 0.85 V to 5 V input; max 5 V output. | Higher efficiency at low output voltages; unsuitable for >5 V outputs; lower input voltage support. | Choose only for sub-5 V boost applications where efficiency >85% at 10 mA load is mandatory. |
Compared with LT3460ESC6#TRM, LT3461ESC6#TRMPBF offers integrated diode convenience but shares identical SC70-6 footprint and 38 V capability, while LTC3400ES5#TRPBF trades output voltage range for synchronous efficiency - making LT3460ESC6#TRM the optimal choice for 12–36 V bias generation in space-constrained analog systems.
Availability
LT3460ESC6#TRM is available at Aetrix Electronics and suitable for CCD bias supplies, TFT-LCD gate driver bias generation, and portable medical diagnostic equipment requiring stable component supply across production lifecycles.
Supply support for LT3460ESC6#TRM 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, documentation, and manufacturing continuity for all former Linear parts.
The LT3460 family was designed specifically for compact, high-voltage boost conversion in portable imaging, display, and instrumentation systems - emphasizing low-noise operation, minimal external components, and robust thermal performance in sub-3 mm² packages.
FAQ
What is the maximum output voltage achievable with LT3460ESC6#TRM?
The LT3460ESC6#TRM supports up to 36 V output voltage, limited by its 38 V-rated internal switch. This is confirmed in the Absolute Maximum Ratings table and validated in typical applications such as the 12 V to 36 V and 5 V to 36 V boost converters shown in the datasheet. Output voltage is set externally via the FB resistor divider, with VOUT = 1.255 V × (1 + R1/R2). The LT3460ESC6#TRM must be used with appropriate external diode and capacitor ratings for reliable 36 V operation.
Does LT3460ESC6#TRM require an external Schottky diode?
Yes, the LT3460ESC6#TRM requires an external Schottky diode (e.g., CMDSH2-3) connected between SW and VOUT. Unlike the LT3461 variant, it does not integrate a diode. The datasheet's typical application circuits (Figures 1, 2, 4, etc.) explicitly show this external diode, and the "Related Parts" table distinguishes LT3461 as the integrated-Schottky version. Omitting the diode will prevent proper boost operation and may damage the IC.
What is the purpose of the NC pin (Pin 5) on LT3460ESC6#TRM?
The NC (No-Connect) pin on LT3460ESC6#TRM (Pin 5) is not bonded internally and carries no electrical function. However, the datasheet recommends tying it to GND to improve thermal conduction and reduce EMI susceptibility. This practice enhances thermal resistance performance (θJA) and provides additional shielding for the sensitive FB node nearby. It is not optional for production designs per layout guidance in the "Layout Hints" section.
Can LT3460ESC6#TRM operate from a 2.5 V input to generate 5 V at 100 mA?
No - the LT3460ESC6#TRM cannot sustain 100 mA at 5 V from a 2.5 V input. Its 300 mA switch current limit and efficiency curves (e.g., Figure TA03a) show maximum output current drops significantly below 3 V input. At VIN = 2.5 V and VOUT = 5 V (duty cycle ≈ 56%), practical output current is ≤40 mA due to VCE(SAT) losses and inductor saturation. For 100 mA at 5 V, consider LTC3400ES5#TRPBF or LT3461ESC6#TRMPBF instead.
Is LT3460ESC6#TRM pin-compatible with LT3460ES5#TRPBF?
No, LT3460ESC6#TRM is not pin-compatible with LT3460ES5#TRPBF. The former uses a 6-lead SC70 package (Pin 1: SW, Pin 2: GND, Pin 3: FB, Pin 4: SHDN, Pin 5: NC, Pin 6: VIN), while the latter uses a 5-lead TSOT-23 package (Pin 1: SW, Pin 2: GND, Pin 3: FB, Pin 4: SHDN, Pin 5: VIN) with no NC pin. Layout redesign and netlist updates are required for substitution; the SC70-6 offers better thermal performance but different footprint and pin mapping.
LT3460ESC6#TRM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- 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:
- 300mA (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LT3460ESC6#TRM FAQ
1.How can I place an order for LT3460ESC6#TRM through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3460ESC6#TRM 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#TRM reliable?
The price and inventory of LT3460ESC6#TRM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3460ESC6#TRM is usually 5 days.
3.What payment methods are accepted for LT3460ESC6#TRM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3460ESC6#TRM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3460ESC6#TRM?
LT3460ESC6#TRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3460ESC6#TRM 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#TRM?
For technical support, including LT3460ESC6#TRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3460ESC6#TRM requirements.
6.How does Aetrix verify that LT3460ESC6#TRM is sourced from the original manufacturer or authorized distributors?
All LT3460ESC6#TRM 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#TRM meets industry standards.
7.What is the process for return or replacement of LT3460ESC6#TRM?
All LT3460ESC6#TRM units undergo pre-shipment inspection (PSI). If there is an issue with LT3460ESC6#TRM, 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#TRM part is unused and in its original packaging.
Return procedure for LT3460ESC6#TRM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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