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Analog Devices Inc. LTC3526BEDC-2#TRMPBF
- Part No.:
- LTC3526BEDC-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3526BEDC-2#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:362
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Product details
Overview
LTC3526BEDC-2#TRMPBF from Analog Devices (formerly Linear Technology) is a 2MHz synchronous step-up DC/DC converter with output disconnect, designed for ultra-low-voltage battery-powered systems. It starts up from 850mV, operates down to 500mV, delivers up to 200mA at 3.3V from two alkaline/NiMH cells, and achieves up to 94% efficiency in a 2mm × 2mm DFN-6 package.
For engineers reviewing the LTC3526BEDC-2#TRMPBF datasheet, LTC3526BEDC-2#TRMPBF pinout, LTC3526BEDC-2#TRMPBF application, or LTC3526BEDC-2#TRMPBF equivalent, key selection criteria include its Burst Mode® quiescent current (9µA), 2MHz fixed-frequency PWM operation, internal synchronous rectification, anti-ringing control, and true output disconnect capability in space-constrained portable electronics.
Technical Context
The LTC3526BEDC-2#TRMPBF implements current-mode PWM control with internal slope compensation and adaptive zero-current detection to enable discontinuous conduction mode optimization. Its dedicated start-up oscillator initiates regulation at 0.85V, then transitions to VOUT-powered operation once VOUT exceeds VIN by 0.24V - eliminating dependency on input capacitance at low VIN.
Unlike the LTC3526-2 variant, the LTC3526B-2 (including LTC3526BEDC-2#TRMPBF) features continuous 2MHz switching without Burst Mode, instead using pulse-skipping at light loads. It integrates N-channel and P-channel MOSFETs with RDS(ON) of 0.4Ω and 0.6Ω respectively, and includes thermal shutdown, short-circuit current limiting (400mA), and logic-controlled shutdown with <1µA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Start-Up Voltage | 850mV typical - enables reliable startup from single AA/AAA or Li-ion cells near end-of-life. |
| VIN Operating Range | 0.5V to 5V - supports deep discharge battery operation while maintaining regulation even when VIN > VOUT. |
| VOUT Adjustment Range | 1.6V to 5.25V via external resistor divider - allows flexible rail generation for MCU cores, sensors, or RF modules. |
| Switching Frequency | 2MHz fixed - permits use of sub-3mm height inductors (e.g., 2.2µH) and ceramic capacitors, minimizing solution footprint. |
| Peak Switch Current Limit | 700mA typical - sets maximum deliverable output power under boost conditions; reduced to 400mA during short-circuit. |
| Efficiency | Up to 94% at 3.3V/200mA - achieved via synchronous rectification and low RDS(ON) MOSFETs, critical for battery runtime extension. |
| Quiescent Current (Active) | 250–500µA - measured on VOUT during nonswitching operation, enabling low-power standby modes. |
Pinout & Package
The LTC3526BEDC-2#TRMPBF is housed in a 6-pin, 2mm × 2mm × 0.75mm plastic DFN package with exposed pad (Pin 7) that must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; internal N-MOSFET drain; anti-ringing switch engages during DCM to suppress EMI. |
| GND (Pin 2) | Signal and power ground | Primary ground reference; requires short, low-inductance path to input/output capacitor negatives. |
| VIN (Pin 3) | Input supply | Accepts 0.5V–5V; powers internal circuitry until VOUT > VIN + 0.24V, after which IC self-powers from VOUT. |
| SHDN (Pin 4) | Logic shutdown control | Active-high; internal 4MΩ pull-down; drives <1µA shutdown current; voltage must stay below VIN + 0.4V to avoid test mode. |
| FB (Pin 5) | Feedback input | Connects to resistor divider midpoint; senses 1.195V reference; programs VOUT = 1.195 × (1 + R1/R2). |
| VOUT (Pin 6) | Output voltage sense / sync rectifier drain | Drain of internal P-MOSFET; provides true output disconnect during shutdown - no reverse current into VIN. |
Key Features
| Feature | Design Value |
|---|---|
| True output disconnect | Eliminates body diode conduction, allowing VOUT to fall to 0V during shutdown and preventing reverse battery current. |
| Anti-ringing control | Internally damps SW-node resonance during discontinuous mode, reducing radiated EMI without external components. |
| Integrated soft-start | Ramps peak inductor current from 0 to 700mA over ~0.5ms, enabling safe startup into heavy capacitive loads. |
| Internal loop compensation | Removes need for external compensation network - simplifies design and reduces BOM count for stable 2MHz operation. |
| Low-noise PWM operation | Continuous 2MHz switching (vs Burst Mode) minimizes output voltage ripple and avoids audible noise in audio-sensitive applications. |
Applications
| Medical Instruments | Wireless Mice |
|---|---|
Use Scenario: Portable glucose meters and handheld diagnostic tools powered by single AAA batteries requiring regulated 3.3V for microcontroller and sensor interface. IC Role / Device Role / Timing Role: Primary step-up regulator delivering stable 3.3V from 0.9–1.5V battery input, with output disconnect preserving battery charge during sleep. Use Value: 850mV start-up and 500mV operating minimum extend usable battery life by >30% compared to conventional boost converters. | Use Scenario: Ultra-low-power optical wireless mice using coin-cell or AAA batteries, needing clean 1.8V or 3.3V rails for MCU and radio transceiver. IC Role / Device Role / Timing Role: Fixed-frequency 2MHz boost converter supplying regulated output with minimal EMI impact on 2.4GHz RF link. Use Value: Anti-ringing control and continuous PWM reduce conducted/radiated noise, improving Bluetooth/Wi-Fi coexistence without shielding. |
| Noise Canceling Headphones | Bluetooth Headsets |
Use Scenario: Active noise cancellation circuits in premium headphones requiring low-noise 5V rail from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: High-efficiency step-up stage generating 5V for analog signal processing and op-amp biasing, operating across full battery range. Use Value: Up to 94% efficiency and <500µA active IQ minimize heat generation and preserve battery runtime during extended ANC usage. | Use Scenario: Miniature Bluetooth headsets with tight height constraints (<1mm profile) needing 3.3V from 1.0–1.6V single-cell alkaline input. IC Role / Device Role / Timing Role: Compact 2mm × 2mm boost converter enabling <1mm board height while delivering 75mA at 3.3V. Use Value: 2MHz switching allows use of 2.2µH shielded inductors under 0.8mm height, meeting mechanical envelope requirements without sacrificing efficiency. |
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 |
|---|---|---|---|
| LTC3526EDC-2#TRMPBF | Same pinout and function but uses Burst Mode® (9µA IQ) instead of continuous PWM; lower light-load efficiency but higher ripple. | Better suited for intermittent wake-up applications (e.g., remote controls); less ideal for noise-sensitive audio paths. | Select LTC3526BEDC-2#TRMPBF when low-noise, fixed-frequency operation is required; choose LTC3526EDC-2#TRMPBF when ultra-low IQ dominates design priority. |
| TPS61200DRCT | 2.5MHz switching, 0.9V start-up, but lacks output disconnect and anti-ringing; uses external compensation. | Requires additional components for stability; no true VOUT isolation during shutdown - unsuitable where battery reverse leakage must be avoided. | Only consider TPS61200DRCT if footprint and cost outweigh need for output disconnect and EMI control. |
Compared with LTC3526EDC-2#TRMPBF, the LTC3526BEDC-2#TRMPBF trades lower quiescent current for superior noise performance and predictable fixed-frequency behavior; versus TPS61200DRCT, it offers integrated protection features and smaller total solution size despite identical 2mm × 2mm footprint.
Availability
LTC3526BEDC-2#TRMPBF is available at Aetrix Electronics and suitable for medical instruments, wireless peripherals, noise-canceling audio devices, and Bluetooth headsets requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3526BEDC-2#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, documentation, and manufacturing continuity for all Linear-branded power management ICs.
The LTC3526B-2 family was designed specifically for ultra-low-input-voltage, high-efficiency boost conversion in space-constrained portable electronics - emphasizing startup reliability, EMI control, and true output isolation.
FAQ
What is the minimum input voltage required for LTC3526BEDC-2#TRMPBF to start switching?
The LTC3526BEDC-2#TRMPBF has a typical start-up input voltage of 850mV, verified across –40°C to 85°C. It begins regulation once VIN reaches this threshold and continues operation down to 500mV after startup. This enables reliable functionality in deeply discharged single-cell alkaline, NiMH, or Li-ion systems where other boost converters fail to initiate.
Does LTC3526BEDC-2#TRMPBF support output voltages higher than the input voltage?
Yes, LTC3526BEDC-2#TRMPBF is explicitly designed for step-up (boost) operation and regulates VOUT up to 5.25V even when VIN is as low as 0.5V. It also tolerates VIN > VOUT conditions - maintaining regulation albeit with reduced efficiency and lower output current capability - as confirmed in the "VIN > VOUT Operation" section of the datasheet.
How does the output disconnect feature work in LTC3526BEDC-2#TRMPBF?
The LTC3526BEDC-2#TRMPBF achieves true output disconnect by disabling the internal P-channel MOSFET's body diode path during shutdown. When SHDN is pulled low, VOUT falls to 0V and draws zero current from VIN - preventing battery drain and enabling safe hot-swap or multi-rail sequencing. This requires no external diodes and is intrinsic to the LTC3526BEDC-2#TRMPBF's architecture.
What is the purpose of the anti-ringing control in LTC3526BEDC-2#TRMPBF?
The anti-ringing control in LTC3526BEDC-2#TRMPBF actively dampens high-frequency resonance between the inductor and SW-node parasitic capacitance during discontinuous conduction mode. By engaging an internal switch from SW to VIN, it suppresses EMI without external snubbers - directly improving EMC compliance in compact, unshielded consumer devices like Bluetooth headsets.
Can LTC3526BEDC-2#TRMPBF be used with ceramic output capacitors only?
Yes, LTC3526BEDC-2#TRMPBF is internally compensated for stability with ≥4.7µF ceramic output capacitors - no external series resistance or additional components needed. The datasheet confirms compatibility with X5R/X7R dielectrics and specifies optimal values (e.g., 4.7µF–10µF) to balance ripple suppression, transient response, and board area - making it ideal for all-ceramic, low-profile designs.
LTC3526BEDC-2#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- 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):
- 0.5V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 500mA (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3526BEDC-2#TRMPBF FAQ
1.How can I place an order for LTC3526BEDC-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3526BEDC-2#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 LTC3526BEDC-2#TRMPBF reliable?
The price and inventory of LTC3526BEDC-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3526BEDC-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3526BEDC-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3526BEDC-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3526BEDC-2#TRMPBF?
LTC3526BEDC-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3526BEDC-2#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 LTC3526BEDC-2#TRMPBF?
For technical support, including LTC3526BEDC-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3526BEDC-2#TRMPBF requirements.
6.How does Aetrix verify that LTC3526BEDC-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3526BEDC-2#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 LTC3526BEDC-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3526BEDC-2#TRMPBF?
All LTC3526BEDC-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3526BEDC-2#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 LTC3526BEDC-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3526BEDC-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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