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Analog Devices Inc. LTC3526BEDC#TRMPBF
- Part No.:
- LTC3526BEDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3526BEDC#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:254
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Product details
Overview
LTC3526BEDC#TRMPBF from Analog Devices is a 5V, 1.5A synchronous step-up DC/DC converter in a 8-pin 2mm × 2mm DFN package, featuring 2MHz fixed switching frequency, integrated 100mΩ/120mΩ MOSFETs, and shutdown current of <1µA - used in portable USB power banks and low-voltage sensor node power rails.
For engineers reviewing the LTC3526BEDC#TRMPBF datasheet, LTC3526BEDC#TRMPBF pinout, LTC3526BEDC#TRMPBF application, or LTC3526BEDC#TRMPBF equivalent, key selection criteria include input voltage range (1.8V–5.5V), output voltage adjustability via feedback resistor divider, peak current mode control stability, and thermal performance in compact 2mm × 2mm DFN layouts.
Technical Context
The LTC3526BEDC#TRMPBF employs peak current mode control with internal compensation to maintain regulation across load transients up to 1.5A. It integrates both main and synchronous rectifier MOSFETs, eliminating external diode losses and enabling >90% efficiency at 5Vout/500mA.
Its 2MHz switching frequency allows use of small 1µH inductors and 4.7µF ceramic output capacitors. The device includes undervoltage lockout (UVLO) at 1.6V, thermal shutdown, and soft-start to limit inrush current during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, Li-poly, or two-cell alkaline/NiMH inputs without pre-regulation. |
| Output Voltage | Adjustable 2.5V to 5.5V via external resistor divider - enables flexible rail generation for USB peripherals or logic supplies. |
| Switching Frequency | 2MHz fixed - permits miniaturized magnetics and low-profile ceramic capacitors in space-constrained designs. |
| Max Output Current | 1.5A at VIN ≥ 2.7V and VOUT = 5V - sufficient for powering USB 2.0 devices or multiple low-power ICs. |
| Shutdown Current | <1µA - preserves battery life in always-on sensor nodes or standby modes. |
| Package | 8-pin 2mm × 2mm DFN with exposed pad - provides low thermal resistance (θJA = 65°C/W) for high-current operation without heatsinking. |
Pinout & Package
8-pin 2mm × 2mm DFN package with exposed thermal pad (EP); RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8V–5.5V; bypassed externally with 1µF ceramic capacitor near pin. |
| SW | Switch node | Connects to inductor; carries high dv/dt switching waveform - requires tight layout and ground plane. |
| GND | Power and signal ground | Common return for input/output paths and IC substrate; tied directly to EP for thermal conduction. |
| FB | Feedback input | Senses output voltage via resistor divider; sets regulated VOUT = 0.6V × (1 + R1/R2). |
| SHDN | Enable/shutdown control | Active-high logic input; pulls low to disable converter and reduce quiescent current to <1µA. |
| BOOST | Bootstrap supply | Charges bootstrap capacitor for high-side MOSFET gate drive; requires 0.022µF ceramic capacitor to SW. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ/120mΩ MOSFETs | Eliminates external diode and reduces conduction loss - improves efficiency by ~8% vs. asynchronous boost converters. |
| 2MHz fixed-frequency operation | Enables use of 1µH inductors ≤ 2.5mm height - critical for ultra-thin portable electronics. |
| Internal soft-start | Controls output voltage ramp rate to prevent overshoot and inrush current spikes into downstream capacitance. |
| Thermal shutdown with hysteresis | Protects against sustained overload or poor PCB thermal design; resumes operation after die cools by ~15°C. |
Applications
| USB Power Bank | Wireless Sensor Node |
|---|---|
Use Scenario: Portable 5V USB charging bank powered by single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary step-up regulator generating stable 5V output from 3.0V–4.2V battery range. Use Value: Delivers up to 1.5A at >90% efficiency across full battery discharge curve, extending usable runtime. | Use Scenario: Battery-powered industrial temperature/humidity sensor transmitting via BLE or LoRa. IC Role / Device Role / Timing Role: Bias supply for RF transceiver and analog front-end, activated only during transmit bursts. Use Value: Sub-1µA shutdown current minimizes quiescent drain, enabling multi-year operation on CR2032 coin cell. |
| Portable Medical Monitor | Low-Power Display Backlight |
Use Scenario: Handheld pulse oximeter with OLED display and optical sensing circuitry. IC Role / Device Role / Timing Role: Generates 5V rail for OLED driver IC and analog signal chain from 3.7V Li-poly battery. Use Value: 2MHz switching avoids audible noise in sensitive medical audio bands while maintaining compact BOM size. | Use Scenario: Small-form-factor smart thermostat with segmented LCD backlight requiring 5V bias. IC Role / Device Role / Timing Role: Efficient boost source for white LED strings or LCD bias circuitry. Use Value: Integrated MOSFETs and 2MHz operation allow single 1µH inductor and no external Schottky diode - reducing component count by 3 parts. |
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 |
|---|---|---|---|
| TPS610995DRCR | Lower 1.2A max output current; 1.2MHz switching frequency; different FB reference (0.5V). | Better light-load efficiency below 10mA but limited peak current headroom for burst-mode loads. | Select when prioritizing ultra-low IQ (300nA) over peak current capability. |
| MAX17222ETA+ | Fixed 5V output only; 1.2A rating; 1.2MHz switching; no BOOST pin required. | Simpler layout and fewer external components, but lacks output voltage flexibility. | Select for cost-sensitive, fixed-output applications where adjustable VOUT is unnecessary. |
Compared with TPS610995DRCR and MAX17222ETA+, the LTC3526BEDC#TRMPBF offers higher output current (1.5A vs. 1.2A), higher switching frequency (2MHz vs. 1.2MHz), and adjustable output voltage - making it optimal for dynamic, space-constrained, multi-rail portable systems.
Availability
LTC3526BEDC#TRMPBF is available at Aetrix Electronics and suitable for portable medical monitors, USB power banks, wireless sensor nodes, and low-power display backlighting requiring stable component supply and long-term manufacturability.
Supply support for LTC3526BEDC#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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC3526BEDC#TRMPBF belongs to the LTC® monolithic DC/DC converter product line, designed specifically for high-efficiency, compact, battery-powered portable electronics requiring regulated 5V outputs from low-input sources.
FAQ
What is the minimum input voltage required for the LTC3526BEDC#TRMPBF to regulate a 5V output?
The LTC3526BEDC#TRMPBF requires a minimum input voltage of 1.8V to initiate regulation. However, to sustain 5V output at full 1.5A load, VIN must remain ≥2.7V due to MOSFET RDS(on) and duty cycle limitations. Below 2.7V, maximum output current decreases progressively - at 2.0V input, 5V/500mA is achievable.
Does the LTC3526BEDC#TRMPBF require an external Schottky diode?
No, the LTC3526BEDC#TRMPBF does not require an external Schottky diode. It integrates both high-side and low-side synchronous MOSFETs, replacing the need for a discrete diode and improving conversion efficiency by eliminating forward voltage drop losses.
How is output voltage set on the LTC3526BEDC#TRMPBF?
Output voltage on the LTC3526BEDC#TRMPBF is set using a resistive divider from VOUT to FB and from FB to GND. With a 0.6V internal reference, VOUT = 0.6V × (1 + R1/R2). Standard configurations for 5V use R1 = 732kΩ and R2 = 100kΩ, placed close to the FB pin with minimal trace length.
What thermal considerations apply to the LTC3526BEDC#TRMPBF in a 2mm × 2mm DFN package?
The LTC3526BEDC#TRMPBF's 2mm × 2mm DFN package relies on its exposed pad (EP) for thermal conduction. For reliable 1.5A operation, the EP must be soldered to a ≥40mm² copper area with ≥4 thermal vias to inner/ground planes. Without adequate copper, junction temperature may exceed 125°C under continuous load, triggering thermal shutdown.
Can the LTC3526BEDC#TRMPBF be synchronized to an external clock?
No, the LTC3526BEDC#TRMPBF operates with a fixed 2MHz internal oscillator and does not support external clock synchronization. Its timing is fully self-contained, eliminating need for external clock sources but precluding frequency alignment with other system clocks or noise spreading techniques.
LTC3526BEDC#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):
- 1V
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 500mA (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3526BEDC#TRMPBF FAQ
1.How can I place an order for LTC3526BEDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3526BEDC#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#TRMPBF reliable?
The price and inventory of LTC3526BEDC#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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3526BEDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3526BEDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3526BEDC#TRMPBF?
LTC3526BEDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3526BEDC#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#TRMPBF?
For technical support, including LTC3526BEDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3526BEDC#TRMPBF requirements.
6.How does Aetrix verify that LTC3526BEDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3526BEDC#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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3526BEDC#TRMPBF?
All LTC3526BEDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3526BEDC#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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3526BEDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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