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Analog Devices Inc. LT3460ESC6#TRMPBF
- Part No.:
- LT3460ESC6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LT3460ESC6#TRMPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 300MA SC70
- Quantity:
- Payment:
- Shipping:
Inventory:1,173
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Product details
Overview
LT3460ESC6#TRMPBF from Analog Devices (formerly Linear Technology) is a 1.3 MHz fixed-frequency step-up DC/DC converter in SC70-6 package, integrating a 300 mA/38 V switch for compact boost applications. It delivers up to 12 V at 70 mA from a 5 V input, supports 2.5 V–16 V input range, features 1.255 V feedback reference, and achieves <1 μA shutdown current - ideal for CCD bias, TFT-LCD supplies, and portable medical diagnostics.
For engineers reviewing the LT3460ESC6#TRMPBF datasheet, LT3460ESC6#TRMPBF pinout, LT3460ESC6#TRMPBF application, or LT3460ESC6#TRMPBF equivalent, key selection criteria include switching frequency (1.3 MHz), integrated switch rating (300 mA / 38 V), feedback voltage accuracy (±20 mV), SC70-6 thermal performance (θJA = 270°C/W over ground plane), and compatibility with low-profile external components (22 μH inductor, 4.7 μF input cap).
Technical Context
The LT3460ESC6#TRMPBF employs constant-frequency peak current mode control with internal 1.255 V reference and ramp compensation, enabling stable regulation across wide line/load variations. Its oscillator operates at 1.3 MHz (LT3460 variant), supporting small ceramic capacitors and low-height inductors while delivering predictable EMI profiles.
Internal compensation (RC/CC) sets a ~70 kHz zero; external feed-forward capacitor (CF) from VOUT to FB is recommended for phase margin improvement in most boost configurations. The device requires no external sense resistor and uses direct switch-current sensing via integrated MOSFET VCE(SAT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3 MHz - enables use of sub-3 mm inductors and 0402/0603 ceramic caps; reduces output ripple filtering burden. |
| Input Voltage Range | 2.5 V to 16 V - supports single Li-ion, dual alkaline, or regulated 3.3/5/12 V rails without pre-regulation. |
| Feedback Reference | 1.255 V ±20 mV - sets output via R1/R2 divider; enables precise 5 V, 12 V, or 36 V bias generation. |
| Integrated Switch | 300 mA / 38 V rated - handles 70 mA @ 12 V output with margin; eliminates external high-voltage switch. |
| Quiescent Current | 1 mA typical - maintains efficiency >75% at light loads (e.g., 1 mA output); critical for battery-backed systems. |
| Shutdown Current | <1 μA - ensures negligible drain during standby; extends shelf life in medical or sensor nodes. |
| Package Thermal Resistance | θJA = 270°C/W (over ground plane) - requires minimal copper area for 85°C ambient operation at full load. |
Pinout & Package
LT3460ESC6#TRMPBF is housed in a 6-lead plastic SC70 package (JEDEC MO-220, EIAJ SC-70), 2.0 mm × 1.25 mm × 0.9 mm profile, with exposed pad not present (unlike DFN variants). Pin 1 marked by bar; pinout validated per LTC DWG #05-08-1638.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node | Connects to inductor/diode anode; high dv/dt node requiring minimized trace length and guard ring to reduce 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; 1.255 V reference point - sensitive to noise; keep trace short and away from SW. |
| SHDN (Pin 4) | Enable/Soft-Start Control | Logic-level input: ≥1.5 V enables, ≤0.4 V disables; RC filter (47 kΩ/47 nF) provides controlled startup ramp. |
| VIN (Pin 5) | Input Supply | Connects to input source; requires local 4.7 μF ceramic bypass capacitor placed within 2 mm of pin. |
| NC (Pin 6) | No-Connect | Internally unconnected; recommended to tie to GND for improved thermal dissipation and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.3 MHz switching | Enables consistent EMI filtering design and eliminates frequency drift vs. temperature/load - simplifies compliance testing. |
| 38 V integrated switch | Supports outputs up to 36 V without external HV transistor - reduces BOM count and layout complexity for CCD/TFT bias rails. |
| 1.255 V precision feedback | ±20 mV tolerance over –40°C to +85°C enables <±1% output regulation without trimming - critical for analog sensor biasing. |
| SC70-6 footprint | 0.65 mm pitch, 2.0 mm × 1.25 mm body - fits dense portable PCBs where space is constrained (e.g., endoscopy cameras, handheld ultrasound). |
| Low 1 mA quiescent current | Maintains >70% efficiency at 1 mA load - extends battery runtime in always-on diagnostic monitoring circuits. |
Applications
| CCD Bias Supply | TFT-LCD Bias Supply |
|---|---|
Use Scenario: Generating stable 12–36 V bias for charge-coupled device image sensors in digital endoscopes and portable X-ray detectors. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage rail; operates continuously during image capture with tight ripple control. Use Value: Delivers 70 mA @ 12 V from 5 V with <100 mVpp ripple (with 1 μF ceramic output cap), ensuring low-noise pixel readout and minimal dark current. | Use Scenario: Powering gate-on/gate-off voltages (+15 V / –10 V) for active-matrix LCD panels in industrial HMIs and medical displays. IC Role / Device Role / Timing Role: High-voltage boost stage feeding external inverting charge pump; synchronized to display frame rate via SHDN modulation. Use Value: 1.3 MHz switching avoids audible noise in panel drivers; SC70-6 footprint allows placement near display flex connector, minimizing trace inductance. |
| Digital Camera Flash Charging | Portable Medical Diagnostic Equipment |
Use Scenario: Charging high-voltage capacitor (100–300 V) for xenon flash tubes in compact DSLR accessories and inspection tools. IC Role / Device Role / Timing Role: Primary boost controller in multi-stage flyback-assisted topology; enabled only during flash prep cycle. Use Value: 38 V switch rating supports intermediate 36 V rail generation; <1 μA shutdown current prevents battery drain between shots. | Use Scenario: Providing isolated 5 V and ±12 V rails for analog front-end amplifiers and ADC drivers in handheld ECG or EEG units. IC Role / Device Role / Timing Role: Local 5 V boost supply for op-amps and reference buffers; operates from single-cell Li-ion (2.7–4.2 V). Use Value: 2.5 V minimum input enables operation down to battery end-of-life; 1 mA IQ preserves >100 hr runtime on 500 mAh cell. |
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; 38 V switch; 1.3 MHz; same SC70-6 package. | Reduces external component count (no external diode needed); slightly higher quiescent current (2.8 mA). | Select when board space is extremely limited and diode loss dominates efficiency at light loads. |
| LTC3400ES5#TRMPBF | Synchronous rectification; 600 mA switch; 1.2 MHz; SOT-23-5 package. | Higher efficiency at medium loads (>20 mA); lower max output voltage (5 V); different pinout and package. | Select for 5 V-only applications where >90% efficiency at 50 mA is required and SOT-23 layout is acceptable. |
Compared with LT3460ESC6#TRMPBF, LT3461ESC6#TRMPBF saves one external component but trades off 1.8 mA higher operating current, while LTC3400ES5#TRMPBF offers superior light-load efficiency at the cost of reduced output voltage capability and incompatible pin mapping - making LT3460ESC6#TRMPBF optimal for 12–36 V bias generation in ultra-compact footprints.
Availability
LT3460ESC6#TRMPBF is available at Aetrix Electronics and suitable for CCD bias supply, TFT-LCD bias supply, and portable medical diagnostic equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for LT3460ESC6#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 technical support, manufacturing continuity, and documentation for legacy Linear parts including the LT3460 family.
The LT3460 product line was designed specifically for space-constrained, high-voltage boost applications in imaging, display, and portable instrumentation - emphasizing low-profile packaging, integrated high-voltage switches, and predictable EMI behavior.
FAQ
What is the maximum output voltage achievable with the LT3460ESC6#TRMPBF?
The LT3460ESC6#TRMPBF supports up to 36 V output voltage, limited by its 38 V-rated internal switch and feedback divider design. This is confirmed in the Absolute Maximum Ratings (SW voltage = 38 V) and Typical Applications (12 V to 36 V Step-Up Converter). Output stability at 36 V requires proper selection of external diode and output capacitor voltage ratings - the LT3460ESC6#TRMPBF itself does not regulate beyond its internal switch's breakdown limit.
Can the LT3460ESC6#TRMPBF operate from a single-cell Li-ion battery?
Yes, the LT3460ESC6#TRMPBF operates from 2.5 V to 16 V input, covering the full discharge range of a single-cell Li-ion (2.7 V–4.2 V). Its 1 mA quiescent current and 1.3 MHz switching maintain regulation and efficiency down to 2.5 V, as verified in Electrical Characteristics and Typical Application TA07 (2.7 V–4.2 V input, 5 V output). The LT3460ESC6#TRMPBF is commonly used in Li-ion-powered medical sensors and portable imagers.
Does the LT3460ESC6#TRMPBF require an external Schottky diode?
Yes, the LT3460ESC6#TRMPBF requires an external Schottky diode (e.g., Central Semiconductor CMDSH2-3) connected between SW and VOUT. Unlike the LT3461 variant, it does not integrate a diode. This is explicitly shown in all Typical Application schematics (Figures F01, F02, TA01–TA08) and confirmed in the Block Diagram (no internal diode symbol). Omitting the diode will prevent proper boost operation.
What is the purpose of the NC pin (Pin 6) on the LT3460ESC6#TRMPBF?
The NC pin (Pin 6) on the LT3460ESC6#TRMPBF is internally unconnected but recommended to be tied to GND for improved thermal performance and reduced EMI susceptibility. Per the Pin Functions section (page 4), "These pins are not connected to internal circuitry. They should be tied to ground to improve thermal and electrical performance." This practice enhances heat dissipation through the PCB and lowers noise coupling into sensitive FB and SHDN nodes - a requirement reflected in layout guidance for SC70 packages.
How does the LT3460ESC6#TRMPBF handle soft-start functionality?
The LT3460ESC6#TRMPBF implements soft-start via its SHDN pin (Pin 4): applying a rising voltage (e.g., through an RC network like 47 kΩ + 47 nF) ramps the output voltage gradually, limiting inrush current. This is documented in the Pin Functions section ("Also functions as soft-start") and demonstrated in Typical Application TA02. The LT3460ESC6#TRMPBF does not include internal soft-start circuitry - external RC timing is mandatory for controlled startup, especially when driving large output capacitances.
LT3460ESC6#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:
- 300mA (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LT3460ESC6#TRMPBF FAQ
1.How can I place an order for LT3460ESC6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3460ESC6#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#TRMPBF reliable?
The price and inventory of LT3460ESC6#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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3460ESC6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3460ESC6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3460ESC6#TRMPBF?
LT3460ESC6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3460ESC6#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#TRMPBF?
For technical support, including LT3460ESC6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3460ESC6#TRMPBF requirements.
6.How does Aetrix verify that LT3460ESC6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3460ESC6#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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3460ESC6#TRMPBF?
All LT3460ESC6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3460ESC6#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#TRMPBF part is unused and in its original packaging.
Return procedure for LT3460ESC6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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