My Inquiry
My Account
Analog Devices Inc. LTC3528BEDDB#TRMPBF
- Part No.:
- LTC3528BEDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3528BEDDB#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3528BEDDB#TRMPBF from Analog Devices (formerly Linear Technology) is a 1MHz synchronous step-up DC/DC converter with output disconnect, designed for ultra-low-voltage battery-powered systems. It starts up from 700mV, delivers up to 400mA at 3.3V from two alkaline/NiMH cells, features integrated soft-start, internal synchronous rectification, and operates down to 500mV after startup - enabling extended runtime in noise-sensitive portable electronics.
For engineers reviewing the LTC3528BEDDB#TRMPBF datasheet, LTC3528BEDDB#TRMPBF pinout, LTC3528BEDDB#TRMPBF application, or LTC3528BEDDB#TRMPBF equivalent, key selection criteria include its 1.6V–5.25V adjustable output range, Burst Mode®-free continuous PWM operation (LTC3528B variant), 125°C junction temperature rating, and DFN-8 (3mm × 2mm) package with exposed thermal pad.
Technical Context
The LTC3528BEDDB#TRMPBF implements fixed-frequency (1MHz) current-mode PWM control with internal slope compensation and adaptive zero-current detection, enabling fast transient response and stable regulation across wide input/output voltage ratios. Its architecture supports VIN > VOUT operation while maintaining regulation, and integrates anti-ringing circuitry to damp inductor ringing during discontinuous conduction mode.
Unlike the LTC3528, the LTC3528B variant (denoted by 'B' in the part number) disables Burst Mode® and maintains continuous switching at light loads - reducing output voltage ripple and EMI in noise-critical applications such as audio amplifiers and RF front-ends. Output disconnect is achieved via controlled P-channel MOSFET gate drive, eliminating body diode conduction during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1MHz fixed - enables use of compact 2.2–4.7µH shielded inductors and low-profile ceramic capacitors. |
| Start-Up Voltage | 700mV typical - allows reliable startup from single-cell alkaline/NiMH or partially discharged Li-ion sources. |
| Output Voltage Range | 1.6V to 5.25V - programmable via external resistor divider; supports 1.8V, 3.3V, and 5V rails from low-input sources. |
| Peak Switch Current Limit | 1.5A typical - sets maximum deliverable output power; reduced to 750mA under short-circuit conditions. |
| Quiescent Current (Active) | 300–500µA - measured on VOUT with no switching; enables low-power standby without disabling regulation. |
| Thermal Shutdown Threshold | 160°C - protects die during overload; resumes operation after ~15°C cooldown. |
| Feedback Reference Voltage | 1.200V ±30mV - defines output setpoint accuracy; used with R1/R2 divider to configure VOUT. |
Pinout & Package
The LTC3528BEDDB#TRMPBF is housed in an 8-lead, 3mm × 2mm × 0.75mm plastic DFN package (DDB) with exposed thermal pad (Pin 9), requiring soldering to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-controlled shutdown input | Pulled low (<0.25V) to enter <1µA shutdown; internal 4MΩ pull-down ensures default-off state. |
| FB (Pin 2) | Feedback voltage sense node | Connects to resistor divider midpoint; regulates VOUT = 1.20V × (1 + R2/R1). |
| PGOOD (Pin 3) | Open-drain power-good indicator | Asserts low when VFB falls >10% below regulation threshold - signals undervoltage fault. |
| VOUT (Pin 4) | Regulated output & synchronous rectifier drain | Serves as both output node and NMOS drain; requires short, low-impedance trace to output capacitor. |
| SW (Pin 5) | Switch node | Connects to inductor; internal anti-ringing switch ties SW to VIN during DCM to suppress EMI. |
| PGND (Pin 6) | Power ground return | Carries high-frequency inductor current; must connect directly to input/output capacitor negatives. |
| SGND (Pin 7) | Signal ground reference | Provides error amplifier and comparator reference; separate from PGND to minimize noise coupling. |
| VIN (Pin 8) | Battery input supply | Accepts 0.7V–5V; requires ≥1µF ceramic decoupling placed adjacent to pin. |
| Exposed Pad (Pin 9) | Thermal & electrical ground | Mandatory solder connection to PCB ground plane; critical for θJA = 76°C/W thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous PWM Operation (LTC3528B) | Eliminates Burst Mode® switching artifacts - essential for low-noise audio, RF, and precision analog circuits. |
| Output Disconnect | Prevents reverse current flow into VIN during shutdown; enables true zero-VOUT state and safe hot-swap capability. |
| Integrated Soft-Start | Ramps peak inductor current over ~0.5ms - prevents inrush surges into large output capacitors or heavy loads. |
| Anti-Ringing Control | Activates internal switch between SW and VIN during discontinuous mode - reduces high-frequency EMI without external components. |
| Low-Voltage Start-Up Oscillator | Operates independently at VIN ≥700mV - ensures reliable boot from deeply discharged batteries before main regulator engages. |
Applications
| Medical Instruments | Noise Canceling Headphones |
|---|---|
Use Scenario: Portable glucose meters and handheld pulse oximeters powered by single AA/AAA cells. IC Role / Device Role / Timing Role: Step-up converter generating stable 3.3V rail for microcontroller, sensor interface, and display backlight from 0.9–1.5V input. Use Value: 700mV start-up and 500mV operational minimum extend usable battery life by >25% versus competing boost ICs. | Use Scenario: Battery-powered active noise cancellation (ANC) earbuds with real-time DSP processing. IC Role / Device Role / Timing Role: Low-noise 3.3V supply for ANC codec and analog front-end, operating continuously without Burst Mode® artifacts. Use Value: Continuous 1MHz PWM (LTC3528B) avoids audible switching noise in sensitive audio paths - confirmed by <1% pk-pk ripple with 10µF output capacitance. |
| Wireless Mice | Bluetooth Headsets |
Use Scenario: Ultra-low-power optical mice using coin-cell batteries (CR2032) with intermittent RF transmission bursts. IC Role / Device Role / Timing Role: Efficient 3.3V generation from 2.0–3.0V input, supporting deep-sleep modes with <1µA shutdown current. Use Value: Output disconnect prevents battery drain during sleep; 125°C junction rating ensures reliability in sealed plastic enclosures. | Use Scenario: Compact Bluetooth voice headsets requiring regulated 3.3V for radio, microphone preamp, and speaker driver. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering 400mA at 3.3V from dual NiMH cells (1.8–3.2V). Use Value: Up to 94% efficiency at 200mA load minimizes heat buildup in thermally constrained earpiece housing. |
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 |
|---|---|---|---|
| TPS61200DRCT | Fixed 3.3V output; no adjustable feedback; 0.3V start-up; lower max output current (300mA). | Suitable for cost-sensitive, fixed-voltage designs where programmability and higher current are not required. | Select TPS61200DRCT only if output voltage is fixed at 3.3V and peak load ≤300mA - avoids external resistor network but sacrifices flexibility. |
| MAX17062ETA+ | 1.2MHz switching; 0.7V start-up; 400mA output; no output disconnect; different pinout and package (8-TDFN). | Applicable where output disconnect is unnecessary and layout allows rework for non-pin-compatible footprint. | Choose MAX17062ETA+ when thermal performance is less critical (no exposed pad requirement) and output disconnect is not needed for system-level safety. |
Compared with TPS61200DRCT and MAX17062ETA+, the LTC3528BEDDB#TRMPBF uniquely combines adjustable output, true output disconnect, 1MHz fixed-frequency operation without Burst Mode®, and a thermally optimized DFN package - making it optimal for noise-sensitive, battery-constrained portable devices requiring design flexibility and long runtime.
Availability
LTC3528BEDDB#TRMPBF is available at Aetrix Electronics and suitable for medical instruments, noise-canceling headphones, wireless mice, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3528BEDDB#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3528/LTC3528B family was engineered specifically for ultra-low-voltage, high-efficiency boost conversion in space-constrained portable electronics - emphasizing startup reliability, low-noise operation, and thermal robustness in miniature DFN packages.
FAQ
What is the key functional difference between LTC3528BEDDB#TRMPBF and LTC3528EDDB#TRMPBF?
The LTC3528BEDDB#TRMPBF uses continuous PWM operation at light loads, whereas the LTC3528EDDB#TRMPBF enters Burst Mode® to reduce quiescent current to 12µA. This makes the LTC3528BEDDB#TRMPBF preferable in noise-sensitive applications like audio codecs where Burst Mode® switching artifacts must be avoided. Both share identical pinout, package, and core specifications.
Does LTC3528BEDDB#TRMPBF support output voltages above 3.3V?
Yes, LTC3528BEDDB#TRMPBF supports an adjustable output voltage range from 1.6V to 5.25V using an external resistor divider on the FB pin. Typical configurations include 1.8V for logic, 3.3V for microcontrollers, and 5V for USB-peripheral interfaces - all achievable with standard 1% resistors and verified in the datasheet's typical applications.
How does the output disconnect feature of LTC3528BEDDB#TRMPBF improve system safety?
The output disconnect feature in LTC3528BEDDB#TRMPBF eliminates body diode conduction in the internal P-channel MOSFET during shutdown, ensuring VOUT drops to 0V and draws zero current from VIN. This prevents unintended power-backfeeding, enables safe hot-swap of batteries, and avoids inrush surges during power-on - critical for medical and wearable devices certified to IEC 62368-1.
What is the recommended minimum input capacitance for stable operation of LTC3528BEDDB#TRMPBF?
The datasheet specifies a minimum 1µF ceramic capacitor directly at the VIN pin of LTC3528BEDDB#TRMPBF. For optimal EMI suppression and transient response, a 10µF X5R/X7R multilayer ceramic capacitor is recommended and placed as close as possible to Pin 8 (VIN) and Pin 6 (PGND). Larger values (e.g., 22µF) may further reduce input ripple without adverse effects.
Can LTC3528BEDDB#TRMPBF operate with VIN greater than VOUT, and what are the implications?
Yes, LTC3528BEDDB#TRMPBF supports VIN > VOUT operation (e.g., 3.6V input to 3.3V output) while maintaining regulation. However, efficiency drops significantly - typically below 70% - and maximum output current is reduced due to increased duty-cycle constraints and conduction losses. This mode should only be used temporarily or for sequencing purposes, not continuous operation.
LTC3528BEDDB#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-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):
- 0.88V
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC3528BEDDB#TRMPBF FAQ
1.How can I place an order for LTC3528BEDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3528BEDDB#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 LTC3528BEDDB#TRMPBF reliable?
The price and inventory of LTC3528BEDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3528BEDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3528BEDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3528BEDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3528BEDDB#TRMPBF?
LTC3528BEDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3528BEDDB#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 LTC3528BEDDB#TRMPBF?
For technical support, including LTC3528BEDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3528BEDDB#TRMPBF requirements.
6.How does Aetrix verify that LTC3528BEDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3528BEDDB#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 LTC3528BEDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3528BEDDB#TRMPBF?
All LTC3528BEDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3528BEDDB#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 LTC3528BEDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3528BEDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3528BEDDB#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
