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Analog Devices Inc. LTC3459ES6#TRMPBF
- Part No.:
- LTC3459ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3459ES6#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 60MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,979
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Product details
Overview
LTC3459ES6#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower synchronous boost converter IC designed for low-power portable systems. It operates from 1.5V to 5.5V input, delivers programmable output voltage from 2.5V to 10V, achieves >85% efficiency across wide load range, and features Burst Mode® operation with <1μA shutdown current-ideal for supercapacitor charging and LCD bias in space-constrained devices.
For engineers reviewing the LTC3459ES6#TRMPBF datasheet, LTC3459ES6#TRMPBF pinout, LTC3459ES6#TRMPBF application, or LTC3459ES6#TRMPBF equivalent, key selection criteria include its 6-pin TSOT-23 package, internal N/P-channel MOSFETs, 75mA typical peak switch current, inrush-limited start-up, and output disconnect during shutdown-critical for battery-powered micropower designs requiring stable regulation below or above VIN.
Technical Context
The LTC3459ES6#TRMPBF implements a fixed-frequency, current-mode synchronous boost architecture with Burst Mode® control to maintain high efficiency at light loads. Its tOFF timer dynamically adjusts based on (VOUT – VIN), enabling continuous inductor current during burst packets and supporting regulated output even when VOUT < VIN.
It integrates dual MOSFET switches (2.8Ω N-ch, 4.2Ω P-ch), a 1.22V feedback reference, zero-current detection, and thermal protection. The IC uses peak current limiting (75mA typ.) and 100ns current-sense delay compensation to manage inductor overshoot, while SHDN logic provides 0.3V–1V enable threshold with 80mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.5V to 5.5V - supports single Li-ion, 2–3 alkaline/NiMH cells, or low-impedance sources without external LDO pre-regulation. |
| VOUT Range | 2.5V to 10V - set via external resistor divider; enables flexible biasing for OLED, LCD, or sensor rails. |
| Peak Switch Current | 75mA typical - limits inductor size and thermal stress; determines max output power at given VIN/VOUT. |
| Quiescent Current | 10μA - enables multi-week battery life in always-on micropower applications like real-time clocks or memory backup. |
| Shutdown Current | <1μA - ensures negligible battery drain during system sleep; critical for energy-harvesting and long-life portable devices. |
| Feedback Reference | 1.22V ±3% - sets output accuracy; allows precise VOUT programming with standard 1% resistor tolerances. |
| Switching Frequency | ~2.5MHz - permits use of small 15–33μH inductors and ceramic capacitors, minimizing solution footprint. |
Pinout & Package
LTC3459ES6#TRMPBF is housed in a 6-lead TSOT-23 (S6) package: 2.9mm × 1.6mm × 0.95mm, with exposed pad not present (unlike DFN variants). Pin 1 is marked by a notch; pin 2 is GND; pin 3 is FB; pin 4 is SHDN; pin 5 is VOUT; pin 6 is VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 6) | Input supply connection | Battery or source input; requires ≥1μF low-ESR ceramic bypass; powers internal circuitry and high-side switch. |
| GND (Pin 2) | Signal and power ground | Common return path for VIN, VOUT, FB, and SW; must be short, low-inductance PCB trace to minimize noise and EMI. |
| FB (Pin 3) | Feedback input to error amplifier | Sets VOUT via R1/R2 divider; VOUT = 1.22(1 + R1/R2); input leakage ≤50nA preserves accuracy with high-value resistors. |
| SHDN (Pin 4) | Enable/disable control input | Logic-high (>1V) enables regulation; logic-low (<0.3V) disables all switching and reduces IQ to <1μA. |
| VOUT (Pin 5) | Regulated output node | Delivers boosted voltage; requires 2.2–10μF X5R ceramic capacitor; ripple increases with smaller COUT values. |
| SW (Pin 1) | Internal switch node | Connects to inductor; carries pulsed current up to 75mA; requires short, wide PCB trace to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N- and P-channel MOSFETs eliminate external Schottky diode, reducing conduction loss and board area. |
| Burst Mode® operation | Maintains >85% efficiency down to 10μA load by pulsing full-current bursts only when needed-no external control required. |
| Inrush current limiting | Controls inductor current during start-up to prevent surge into output capacitor-enables safe cold-start from weak batteries. |
| Output disconnect in shutdown | VOUT is isolated from VIN when SHDN = low, preventing backfeed and preserving battery charge during system off-state. |
| Ultralow quiescent current | 10μA operating IQ extends battery life in always-on applications such as RTCs, sensors, and memory retention circuits. |
Applications
| Supercapacitor Charging | LCD/OLED Bias Supply |
|---|---|
Use Scenario: Charging a 2F/5V ultracapacitor from a 3.3V source for backup power in portable medical or IoT edge nodes. IC Role / Device Role / Timing Role: Constant-current controller with regulated voltage termination; manages inrush and thermal dissipation during bulk charge phase. Use Value: Eliminates need for external current-sense resistor or charge-management IC; enables compact, low-BOM-cost backup power with controlled 50mA average input current. | Use Scenario: Generating 8V bias rail for active-matrix LCD or monochrome OLED display in handheld diagnostic tools. IC Role / Device Role / Timing Role: High-efficiency boost regulator delivering stable output under variable display load current (1–30mA). Use Value: Achieves >90% efficiency at 30mA load from 3.3V input-reducing heat and extending battery runtime versus linear solutions. |
| Digital Camera Power | Low-Power Sensor Node |
Use Scenario: Providing 5V rail for CMOS image sensor and flash LED driver in compact wearable cameras. IC Role / Device Role / Timing Role: Micropower DC/DC converter with fast transient response and output disconnect to isolate sensor during sleep. Use Value: Enables 5V at 30mA from 3.3V input with no external diode; shutdown IQ <1μA minimizes standby drain between photo captures. | Use Scenario: Powering ultra-low-power environmental sensors (e.g., temperature/humidity) in battery-operated wireless nodes. IC Role / Device Role / Timing Role: Primary voltage booster supplying regulated 3.3V or 5V to MCU and analog front-end from coin cell or AA batteries. Use Value: Delivers 20mA at 3.3V from two AA cells (1.8–3.0V) with >85% efficiency-maximizing usable battery capacity over full discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3400ES6#TRMPBF | Higher 600mA peak current, fixed 5V output, no VOUT programming; 19μA IQ vs. 10μA. | Designed for fixed 5V output apps; lacks programmability and sub-1μA shutdown. | Select when fixed 5V output suffices and higher output current is required; avoid if VOUT >5V or ultralow shutdown IQ is mandatory. |
| LT1613ES6#TRMPBF | 550mA ISW, 1.4MHz, 3mA IQ, supports up to 34V VOUT; no output disconnect or Burst Mode®. | Targets higher-power, higher-VOUT apps; less efficient at microamp loads due to higher IQ and no burst operation. | Choose for 10–30mA loads requiring >10V output; not suitable for sub-100μA standby or supercap charging where LTC3459ES6#TRMPBF's burst mode and disconnect are essential. |
Compared with LTC3400ES6#TRMPBF and LT1613ES6#TRMPBF, the LTC3459ES6#TRMPBF uniquely combines programmable 2.5–10V output, <1μA shutdown, output disconnect, and Burst Mode®-making it optimal for micropower, size-constrained, and battery-sensitive applications where dynamic load range and ultra-low standby matter most.
Availability
LTC3459ES6#TRMPBF is available at Aetrix Electronics and suitable for supercapacitor charging, LCD bias, digital camera power, and low-power sensor node applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LTC3459ES6#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 its precision analog and power management portfolio. Linear pioneered high-efficiency, low-quiescent-current DC/DC converters for portable electronics.
The LTC3459 belongs to Linear's micropower synchronous boost converter product line, engineered specifically for battery-powered portable devices where minimal size, ultralow IQ, and reliable regulation across wide VIN/VOUT ratios are critical design requirements.
FAQ
What is the maximum output voltage supported by the LTC3459ES6#TRMPBF?
The LTC3459ES6#TRMPBF supports a programmable output voltage range from 2.5V to 10V, set by an external resistor divider connected to the FB pin. The internal 1.22V reference and feedback equation VOUT = 1.22(1 + R1/R2) allow precise configuration within this range-verified across the full –40°C to 85°C operating temperature range.
Does the LTC3459ES6#TRMPBF support operation when VOUT is lower than VIN?
Yes, the LTC3459ES6#TRMPBF maintains regulation even when VOUT is below VIN (e.g., 3.3V output from 5V input), operating in a buck-like mode using its internal P-channel MOSFET as a synchronous rectifier. Efficiency is reduced in this mode due to higher RDS(ON), but output disconnect and ultralow shutdown current remain fully functional.
What is the recommended inductor value for the LTC3459ES6#TRMPBF?
The datasheet specifies a minimum inductor value of 15μH, with 22μH being the typical recommendation for general-purpose designs. Values up to 33μH improve current capability and reduce ripple but slightly lower switching frequency. Ferrite-core inductors from Coilcraft DO3314 or Taiyo Yuden LB2016 series are validated for use with the LTC3459ES6#TRMPBF.
How does Burst Mode® operation improve efficiency in the LTC3459ES6#TRMPBF?
Burst Mode® operation in the LTC3459ES6#TRMPBF enables high efficiency at light loads by disabling switching until VOUT drops below the 1.22V reference threshold, then delivering short bursts of full-current pulses. This reduces average quiescent current to 10μA and sustains >85% efficiency down to 10μA load-far exceeding conventional PWM converters at micropower levels.
Is the exposed thermal pad present on the LTC3459ES6#TRMPBF package?
No, the LTC3459ES6#TRMPBF uses the S6 (TSOT-23) package, which does not include an exposed thermal pad. Unlike the DFN variants (DC and DCB packages), the TSOT-23 version relies on standard lead-frame thermal conduction. The datasheet explicitly states that the exposed pad is only present on DC and DCB packages-not on S6.
LTC3459ES6#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 10V (Switch)
- Current - Output:
- 60mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC3459ES6#TRMPBF FAQ
1.How can I place an order for LTC3459ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3459ES6#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 LTC3459ES6#TRMPBF reliable?
The price and inventory of LTC3459ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3459ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3459ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3459ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3459ES6#TRMPBF?
LTC3459ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3459ES6#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 LTC3459ES6#TRMPBF?
For technical support, including LTC3459ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3459ES6#TRMPBF requirements.
6.How does Aetrix verify that LTC3459ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3459ES6#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 LTC3459ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3459ES6#TRMPBF?
All LTC3459ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3459ES6#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 LTC3459ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3459ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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