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Analog Devices Inc. LT3460ESC6-1#TRMPBF
- Part No.:
- LT3460ESC6-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LT3460ESC6-1#TRMPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 180MA SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
LT3460ESC6-1#TRMPBF from Analog Devices (formerly Linear Technology) is a 650kHz fixed-frequency step-up DC/DC converter in a 6-lead SC70 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 boost from 5V in compact camera and CCD bias applications.
For engineers reviewing the LT3460ESC6-1#TRMPBF datasheet, LT3460ESC6-1#TRMPBF pinout, LT3460ESC6-1#TRMPBF application, or LT3460ESC6-1#TRMPBF equivalent, key selection criteria include switching frequency (650kHz), integrated switch current rating (180mA), feedback voltage accuracy (±20mV), shutdown current (<1μA), and SC70 thermal performance (θJA = 400°C/W in free air).
Technical Context
The LT3460ESC6-1#TRMPBF uses constant-frequency peak current mode control with internal ramp compensation and a 1.255V precision reference. Its PWM comparator compares sensed switch current plus ramp against error amplifier output, enabling stable regulation across line and load variations.
It integrates a 38V-rated NPN switch with 220mV typical VCE(SAT) at 100mA and supports soft-start via RC filtering on SHDN. The device operates over –40°C to +85°C and features <1μA shutdown current and 25nA typical FB bias current for low-power bias supply designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 650kHz - Enables use of small 22μH inductors and low-profile ceramic capacitors; reduces EMI filtering burden vs lower-frequency converters. |
| 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 external regulators. |
| Output Voltage Range | Up to 36V - Suitable for CCD bias, TFT-LCD gate drivers, and XDSL line drivers requiring high-voltage rails. |
| Integrated Switch Current | 180mA - Limits maximum continuous output current in boost topology; defines practical power ceiling (~1W at 12V out). |
| Feedback Reference | 1.255V ±20mV - Sets output via external resistor divider; tolerance directly impacts output accuracy (e.g., ±1.6% at VOUT = 12V). |
| Quiescent Current | 1mA typical - Enables battery-backed systems to maintain >100-hour runtime in active boost mode with modest load. |
| Shutdown Current | <1μA - Allows true off-state power gating in portable equipment; eliminates standby drain in always-on bias supplies. |
Pinout & Package
LT3460ESC6-1#TRMPBF is housed in a 6-lead plastic SC70 package (LAAF marking), 1.15–1.35mm height, with exposed pad not present (unlike DFN variant). Thermal resistance is 400°C/W in free air and 270°C/W over ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Collector | Connects to inductor and Schottky diode anode; high dv/dt node requiring minimal trace length and ground guard ring to limit EMI. |
| GND (Pin 2) | Power Ground | Main return path for switch current and IC bias; must tie directly to local ground plane with low-inductance connection. |
| FB (Pin 3) | Feedback Input | Senses resistor divider output; 1.255V reference sets VOUT = 1.255V × (1 + R1/R2); sensitive node requiring short, shielded routing. |
| SHDN (Pin 4) | Enable/Soft-Start Control | Logic-high (>1.5V) enables operation; logic-low (<0.4V) disables with <1μA leakage; RC filter adds controlled startup ramp. |
| VIN (Pin 6) | Input Supply | Accepts 2.5–16V; requires local 4.7μF ceramic bypass capacitor placed within 2mm of pin to stabilize input during switching transitions. |
Key Features
| Feature | Design Value |
|---|---|
| 650kHz Fixed Switching Frequency | Enables consistent EMI profile and predictable noise filtering; avoids audible frequencies while supporting sub-2mm inductors. |
| 180mA Integrated NPN Switch | Eliminates external transistor and base drive circuitry; simplifies layout and reduces BOM count for low-to-mid power boost stages. |
| 1.255V Precision Feedback Reference | Provides ±1.6% output accuracy with standard 1% resistors; enables stable 12V, 15V, or 24V bias rails without trimming. |
| <1μA Shutdown Current | Permits zero-drain sleep mode in medical diagnostics and battery-powered imaging modules between acquisition cycles. |
| SC70 Package (1mm height) | Supports ultra-thin camera modules and space-constrained PCBs where DFN or SOT-23 height exceeds mechanical envelope. |
Applications
| Digital Camera Power | CCD Bias Supply |
|---|---|
|
Use Scenario: Generating 12V rail from 3.3V or 5V main supply to power image sensor analog front-end and timing circuits. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage bias; operates continuously during capture sequence. Use Value: Delivers stable 12V at 70mA with <100mV ripple, meeting CCD analog section PSRR requirements without added LDO post-regulation. |
Use Scenario: Supplying programmable 15–30V bias to CCD vertical/horizontal transfer gates in scientific and industrial cameras. IC Role / Device Role / Timing Role: Adjustable high-voltage generator; output set via precision resistor divider for pixel clock synchronization. Use Value: Achieves ±0.5% output stability over temperature using 1.255V reference and low-drift external resistors, ensuring consistent charge transfer efficiency. |
| XDSL Line Driver Supply | TFT-LCD Gate Driver Bias |
|
Use Scenario: Providing 36V auxiliary rail for ADSL/VDSL line driver amplifiers in customer premises equipment. IC Role / Device Role / Timing Role: High-voltage boost stage feeding Class-AB output stage; must sustain 4mA continuous load with fast transient response. Use Value: Maintains regulation under 100μs load steps (2mA → 4mA) with <50mV undershoot, preventing line driver clipping during burst data transmission. |
Use Scenario: Generating 20–25V gate-on voltage for TFT-LCD source/gate drivers in portable displays. IC Role / Device Role / Timing Role: Compact high-voltage supply mounted adjacent to display flex connector; starts only during display enable. Use Value: SC70 footprint fits within 3mm board edge margin; 650kHz switching avoids interference with display pixel clock (typically 25–65MHz). |
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 |
|---|---|---|---|
| LT3460EDC-1#TRPBF | Same electrical specs but in 2mm × 2mm DFN with exposed GND pad; θJA = 102°C/W vs 400°C/W for SC70. | Better thermal performance enables higher ambient operation (e.g., inside sealed enclosures) or sustained 100mA loads. | Select when board space allows DFN and thermal headroom is constrained; avoid if height <1mm is mandatory. |
| LT3461ESC6#TRMPBF | Includes integrated 38V Schottky diode; same 1.3MHz/650kHz option but 300mA switch; feedback reference 1.25V. | Reduces external component count (no external diode needed); higher switch current supports 100mA+ outputs. | Choose when minimizing bill-of-materials and improving efficiency >85% at 50mA is prioritized over strict footprint compatibility. |
Compared with LT3460ESC6-1#TRMPBF, LT3460EDC-1#TRPBF offers superior thermal dissipation in space-tolerant layouts, while LT3460ESC6#TRMPBF provides identical SC70 form factor with higher 300mA switch current-making it suitable for upgraded output power without PCB redesign.
Availability
LT3460ESC6-1#TRMPBF is available at Aetrix Electronics and suitable for digital camera power, CCD bias supply, and XDSL line driver applications requiring stable component supply, long-term manufacturability, and guaranteed lead-free compliance.
Supply support for LT3460ESC6-1#TRMPBF 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/LT3460-1 product line was designed specifically for compact, high-voltage boost conversion in imaging, telecom, and display subsystems-emphasizing low quiescent current, SC70/DFN packaging, and robust 38V switch ratings.
FAQ
What is the maximum output voltage achievable with the LT3460ESC6-1#TRMPBF?
The LT3460ESC6-1#TRMPBF supports output voltages up to 36V, limited by its 38V-rated internal NPN switch and external component voltage ratings. This makes it suitable for CCD bias, TFT-LCD gate drivers, and XDSL line drivers. Output voltage is set externally via resistor divider on the FB pin using the 1.255V reference, and stability at high VOUT depends on proper selection of high-voltage diodes and capacitors.
Does the LT3460ESC6-1#TRMPBF require an external Schottky diode?
Yes, the LT3460ESC6-1#TRMPBF requires an external Schottky diode connected between SW and VOUT. Unlike the LT3461 variant, it does not integrate a diode. A low-forward-voltage, fast-recovery Schottky such as CMDSH2-3 or PMEG2010 is recommended to minimize conduction loss and ensure reliable operation at 650kHz switching.
What is the purpose of the SHDN pin on the LT3460ESC6-1#TRMPBF?
The SHDN pin on the LT3460ESC6-1#TRMPBF serves dual functions: enabling/disabling the converter and implementing soft-start. Driving SHDN ≥1.5V enables operation; ≤0.4V places the device in shutdown with <1μA current draw. Adding an RC network (e.g., 47kΩ + 47nF) to SHDN creates a controlled voltage ramp that limits inrush current and output overshoot during startup.
Can the LT3460ESC6-1#TRMPBF operate from a single Li-ion cell?
Yes, the LT3460ESC6-1#TRMPBF operates from 2.5V minimum input, making it compatible with discharged single-cell Li-ion (2.7–4.2V). In a 2.7V-to-18V boost configuration, it delivers 200μA at 18V with high efficiency. Its 1mA quiescent current preserves battery life, and <1μA shutdown current enables deep-sleep modes in portable diagnostic or imaging devices.
How does the LT3460ESC6-1#TRMPBF differ from the LT3460ESC6#TRMPBF?
The LT3460ESC6-1#TRMPBF is the 650kHz variant with 180mA switch current and 1mA quiescent current, optimized for lower-power bias supplies. The LT3460ESC6#TRMPBF is the 1.3MHz variant with 300mA switch current and 2mA quiescent current, suited for higher-output-current applications. Both share identical SC70-6 packaging, pinout, and operating temperature range (–40°C to +85°C).
LT3460ESC6-1#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LT3460ESC6-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3460ESC6-1#TRMPBF 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#TRMPBF reliable?
The price and inventory of LT3460ESC6-1#TRMPBF 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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3460ESC6-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3460ESC6-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3460ESC6-1#TRMPBF?
LT3460ESC6-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3460ESC6-1#TRMPBF 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#TRMPBF?
For technical support, including LT3460ESC6-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3460ESC6-1#TRMPBF requirements.
6.How does Aetrix verify that LT3460ESC6-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3460ESC6-1#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3460ESC6-1#TRMPBF?
All LT3460ESC6-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3460ESC6-1#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LT3460ESC6-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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