My Inquiry
My Account
Analog Devices Inc. LTC3539EDCB#TRMPBF
- Part No.:
- LTC3539EDCB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3539EDCB#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 2A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,526
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3539EDCB#TRMPBF from Analog Devices (formerly Linear Technology) is a synchronous 2A step-up DC/DC converter with output disconnect, fixed 1MHz switching frequency, 700mV start-up voltage, and internal N- and P-channel MOSFETs in a 2mm × 3mm DFN-8 package. It delivers up to 900mA at 3.3V from two alkaline/NiMH cells and supports adjustable output from 1.5V to 5.25V - used in portable GPS navigation, noise-canceling headphones, and handheld PCs.
For engineers reviewing the LTC3539EDCB#TRMPBF datasheet, LTC3539EDCB#TRMPBF pinout, LTC3539EDCB#TRMPBF application, or LTC3539EDCB#TRMPBF equivalent, key selection criteria include start-up voltage (700mV), output disconnect capability, Burst Mode® vs PWM mode control via MODE pin, and thermal shutdown behavior at 160°C.
Technical Context
The LTC3539EDCB#TRMPBF employs current-mode PWM control with internal slope compensation and adaptive peak-current limiting (2.6A typical), enabling fast transient response and stable operation without external loop compensation. Its independent start-up oscillator enables operation from 0.7V input, and once VOUT exceeds VIN by 0.24V, the IC self-powers from VOUT - decoupling regulation from further VIN dependency.
It integrates anti-ringing circuitry that connects an internal resistor between SW and VIN during discontinuous conduction mode to suppress high-frequency ringing and reduce EMI. Output disconnect is achieved by eliminating body diode conduction of the internal P-channel synchronous rectifier, enabling true zero-VOUT shutdown and inrush current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 1MHz - enables use of compact 2.2–4.7µH inductors and ceramic capacitors, minimizing solution footprint. |
| Input Voltage Range | 0.5V to 5V after start-up; 700mV minimum start-up voltage - supports single-cell alkaline/NiMH and Li-ion battery applications with deep discharge tolerance. |
| Output Voltage Range | Adjustable 1.5V to 5.25V via external resistor divider - accommodates 3.3V logic rails and 5V USB-peripheral interfaces. |
| Feedback Voltage | 1.200V ±1.5% - sets precise output regulation accuracy; enables ±1.5% total output tolerance with proper resistor selection. |
| Peak Switch Current Limit | 2.6A typical - ensures robust overload handling while maintaining efficiency across wide VIN/VOUT combinations. |
| Quiescent Current (Burst Mode) | 10µA - extends battery life in standby or low-duty-cycle portable devices such as bar code scanners. |
| Shutdown Current | <1µA - meets ultra-low-power system requirements during full system sleep states. |
| Efficiency | Up to 94% - achieved via synchronous rectification and low RDS(ON) MOSFETs (0.09Ω NMOS / 0.125Ω PMOS at VOUT = 3.3V). |
Pinout & Package
Package: 8-lead (2mm × 3mm × 0.75mm) plastic DFN with exposed pad (Pin 9), which must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; internal N-MOSFET drain - requires short, wide PCB trace to minimize EMI and switching losses. |
| PGND (Pin 2) | Power ground | Low-impedance return path for inductor current; must tie directly to input/output capacitor negatives and exposed pad. |
| GND (Pin 3) | Signal ground | Reference for FB, MODE, SHDN; routed separately from PGND but joined at single point near exposed pad. |
| VIN (Pin 4) | Battery input | Accepts 0.5–5V; requires ≥2.2µF ceramic decoupling capacitor placed adjacent to pin. |
| SHDN (Pin 5) | Logic shutdown control | Pulled internally to GND via 4MΩ; drives <1µA shutdown current when held below 0.3V. |
| FB (Pin 6) | Feedback input | Senses resistive divider output; regulates VOUT = 1.2V × (1 + R2/R1); input bias current ≤50nA. |
| MODE (Pin 7) | Operation mode select | High = automatic Burst Mode® at light loads; Low = forced fixed-frequency PWM - no external pull-up required. |
| VOUT (Pin 8) | Regulated output / sync rectifier drain | Provides regulated output and serves as source of internal P-MOSFET; trace to output capacitor must be short and wide. |
| Exposed Pad (Pin 9) | Thermal & electrical ground | Must be soldered to PCB ground plane; critical for thermal resistance (θJA = 64°C/W) and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Output disconnect | Eliminates body diode conduction in P-MOSFET, enabling true zero-VOUT shutdown and preventing reverse current into VIN source. |
| Anti-ringing control | Internal resistor connects SW to VIN during DCM to damp LC resonance - reduces radiated EMI without external components. |
| Internal soft-start | Ramps peak inductor current from 0 to 2.6A in ~0.5ms - prevents inrush surges into heavy capacitive loads at startup. |
| Zero-current detection | Shuts off synchronous rectifier at ~40mA inductor current - prevents reverse current and improves light-load efficiency. |
| Thermal shutdown | Activates at TJ = 160°C; disables all switches and discharges soft-start capacitor - protects against sustained overloads. |
| UVLO with hysteresis | Start-up at 0.7V (typ), with hysteresis ensuring reliable restart only after VIN recovers sufficiently above threshold. |
Applications
| Portable GPS Navigation | Noise-Canceling Headphones |
|---|---|
|
Use Scenario: Powers GPS RF front-end and baseband processor from single Li-ion cell (3.0–4.2V) requiring stable 3.3V rail. IC Role / Device Role / Timing Role: Synchronous boost regulator delivering 3.3V @ 350mA with output disconnect during sleep cycles. Use Value: 94% peak efficiency and 10µA Burst Mode quiescent current extend battery runtime beyond 10 hours per charge. |
Use Scenario: Supplies analog audio amplifiers and DSP core in active noise cancellation earbuds operating from 1.2V NiMH cell. IC Role / Device Role / Timing Role: Step-up converter generating 1.8V/3.3V rails with 700mV start-up to utilize full cell discharge range. Use Value: Enables operation down to 0.5V input post-startup, extracting >15% additional energy from depleted batteries. |
| Handheld PCs | Portable Bar Code Scanners |
|
Use Scenario: Generates 5V for USB OTG peripherals and display backlight drivers from dual alkaline cells (1.8–3.2V). IC Role / Device Role / Timing Role: High-current (900mA) boost converter with VIN > VOUT pass-through capability during battery swap. Use Value: Output disconnect prevents backfeed into dying cells; 2.6A current limit sustains burst loads during screen refresh. |
Use Scenario: Powers laser diode driver and CMOS image sensor in battery-operated retail scanners using AA/AAA cells. IC Role / Device Role / Timing Role: Compact 2mm × 3mm DFN regulator delivering 3.3V @ 600mA with minimal BOM count (6 external parts). Use Value: 1MHz switching allows use of 2.2µH shielded inductor - reducing solution height to <1.2mm for slim form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3422EDE#TRPBF | 3MHz switching, 1.5A output, 3mm × 3mm DFN, 500mV start-up, no output disconnect | Higher frequency enables smaller magnetics but lacks true output disconnect and has lower current rating | Select LTC3539EDCB#TRMPBF when output disconnect, 2A capability, or 1MHz EMI profile is required |
| LTC3421EFE#TRPBF | 3MHz switching, 3A output, QFN-24, 500mV start-up, includes output disconnect | Higher current and lower start-up voltage, but larger 4mm × 4mm package and more complex layout | Choose LTC3539EDCB#TRMPBF for space-constrained designs needing proven 2A performance in minimal footprint |
Compared with LTC3422EDE#TRPBF and LTC3421EFE#TRPBF, the LTC3539EDCB#TRMPBF offers optimal balance of 2A capability, 700mV start-up, output disconnect, and 2mm × 3mm size - making it preferred for ultra-compact, battery-critical portable systems where board area and shutdown isolation are design priorities.
Availability
LTC3539EDCB#TRMPBF is available at Aetrix Electronics and suitable for portable GPS navigation, noise-canceling headphones, and handheld PCs requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for LTC3539EDCB#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 high-performance power management portfolio with rigorous automotive-grade reliability and precision analog heritage.
The LTC3539EDCB#TRMPBF belongs to Linear's synchronous boost converter product line, designed specifically for ultra-low-voltage battery-powered applications demanding high efficiency, small solution size, and deep-discharge operation.
FAQ
What is the minimum input voltage required to start up the LTC3539EDCB#TRMPBF?
The LTC3539EDCB#TRMPBF features an independent start-up oscillator that initiates operation at a minimum input voltage of 700mV (typical) with 1mA load and 0V output. Once started, it continues regulating down to 500mV input, provided the power source can sustain the required energy transfer under high duty cycle conditions.
Does the LTC3539EDCB#TRMPBF support output voltages higher than the input voltage?
Yes, the LTC3539EDCB#TRMPBF is a step-up (boost) converter and inherently supports VOUT > VIN. It also tolerates VIN > VOUT operation - maintaining regulation even when input exceeds output - though efficiency and maximum output current decrease in that mode per the Typical Performance Characteristics curves.
How does the MODE pin affect operation of the LTC3539EDCB#TRMPBF?
The MODE pin on the LTC3539EDCB#TRMPBF selects between two operating modes: pulling MODE high (>0.88V) enables automatic Burst Mode® at light loads (reducing quiescent current to 10µA), while pulling MODE low (<0.3V) forces continuous fixed-frequency PWM operation - useful for noise-sensitive applications requiring constant switching frequency.
What is the purpose of the exposed pad on the LTC3539EDCB#TRMPBF package?
The exposed pad (Pin 9) on the LTC3539EDCB#TRMPBF is electrically connected to GND and serves as both a thermal conduction path and a low-inductance ground return. It must be soldered to the PCB ground plane to achieve the specified θJA of 64°C/W; failure to do so results in significantly higher junction temperature and potential thermal shutdown.
Can the LTC3539EDCB#TRMPBF be used without external Schottky diodes?
Yes - the LTC3539EDCB#TRMPBF integrates synchronous N- and P-channel MOSFETs and requires no external Schottky diode. Adding one from SW to VOUT improves efficiency by ~2% but defeats output disconnect, VIN > VOUT operation, and short-circuit protection - so it is not recommended unless efficiency is prioritized over those safety and control features.
LTC3539EDCB#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):
- 0.5V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
LTC3539EDCB#TRMPBF FAQ
1.How can I place an order for LTC3539EDCB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3539EDCB#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 LTC3539EDCB#TRMPBF reliable?
The price and inventory of LTC3539EDCB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3539EDCB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3539EDCB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3539EDCB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3539EDCB#TRMPBF?
LTC3539EDCB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3539EDCB#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 LTC3539EDCB#TRMPBF?
For technical support, including LTC3539EDCB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3539EDCB#TRMPBF requirements.
6.How does Aetrix verify that LTC3539EDCB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3539EDCB#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 LTC3539EDCB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3539EDCB#TRMPBF?
All LTC3539EDCB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3539EDCB#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 LTC3539EDCB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3539EDCB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3539EDCB#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…
