My Inquiry
My Account
Analog Devices Inc. LTC3240EDC-2.5#TRPBF
- Part No.:
- LTC3240EDC-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3240EDC-2.5#TRPBF.pdf
- Description:
- IC REG CHRG PUMP 2.5V 150MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3240EDC-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-output step-up/step-down charge pump DC/DC converter delivering 2.5V at up to 60mA across 1.8V–5.5V input, operating as an LDO above VOUT+100mV and switching to 1.2MHz doubling mode below that threshold, used in low-power handheld logic and I/O supplies.
For engineers reviewing the LTC3240EDC-2.5#TRPBF datasheet, LTC3240EDC-2.5#TRPBF pinout, LTC3240EDC-2.5#TRPBF application, or LTC3240EDC-2.5#TRPBF equivalent, key selection factors include its automatic mode-switching behavior, 65µA no-load quiescent current, 2mm×2mm DFN-6 package with exposed pad, and compatibility with ceramic-only external components (1µF fly, 1µF input, 4.7µF output).
Technical Context
The LTC3240EDC-2.5#TRPBF integrates dual-mode regulation: low-dropout linear operation when VIN ≥ VOUT + 100mV, and constant-frequency (1.2MHz) voltage-doubling charge pump operation when VIN falls below that threshold. Its control loop uses internal resistor-divider feedback and modulates charge-pump current strength to maintain regulation.
Built-in soft-start ramps output current from 0 to 300mA over ~2ms to limit inrush; shutdown disconnects VOUT from VIN and draws <1µA. Protection includes current limiting (270mA in step-up, 450mA in step-down) and thermal shutdown at ~160°C with auto-recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±4% (2.4V–2.6V) over full temperature range and load ≤60mA |
| Input Voltage Range | 1.8V to 5.5V - supports single Li-ion, 2-cell NiMH, or 2-AA battery inputs |
| Max Output Current | 60mA continuous - limited by effective open-loop resistance (ROL ≈ 8Ω at 1.8V) |
| No-Load Quiescent Current | 65µA typical - enables multi-day battery life in always-on sensor nodes |
| Switching Frequency | 1.2MHz (typ) in step-up mode - allows use of tiny 1µF ceramic flying capacitor |
| Shutdown Current | <1µA - ensures negligible drain during system sleep states |
| Output Ripple | 20mVP-P at 100mA - meets noise requirements for analog sensors and precision ADCs |
Pinout & Package
Package: 6-lead (2mm × 2mm) plastic DFN with exposed thermal pad (Pin 7), requiring solder connection to PCB ground plane for thermal performance (θJA = 80°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power Ground Reference | Primary ground return path; must connect to solid PCB ground plane |
| VIN (Pin 2) | Input Supply Input | Accepts 1.8V–5.5V; requires ≥1µF low-ESR ceramic bypass close to pin |
| VOUT (Pin 3) | Regulated Output | Delivers fixed 2.5V; requires ≥4.7µF low-ESR ceramic bypass for stability and ripple control |
| C+ (Pin 4) | Flying Capacitor Positive | Connects to positive terminal of 1µF ceramic flying capacitor |
| C– (Pin 5) | Flying Capacitor Negative | Connects to negative terminal of same flying capacitor; polarity reversal prohibited |
| SHDN (Pin 6) | Active-Low Enable | CMOS input (VIH ≥1.2V, VIL ≤0.4V); must not float; disconnects VOUT from VIN when low |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Mode Switching | Seamlessly transitions between LDO and charge-pump modes at VIN = VOUT ±100mV - eliminates need for external mode control logic |
| Built-In Soft-Start | Ramps output current over ~2ms - prevents inrush into large output capacitors without external RC networks |
| Thermal & Short-Circuit Protection | Auto-cycles at junction >160°C and limits output current to 270mA (step-up) or 450mA (step-down) - survives indefinite VOUT-to-GND shorts |
| Ceramic-Only External Components | Requires only three 0603-size ceramics (1µF fly, 1µF IN, 4.7µF OUT) - reduces BOM count and board area vs tantalum-based solutions |
| Exposed Thermal Pad | Pin 7 (GND) must be soldered to PCB ground - achieves θJA = 80°C/W for 60mA operation at 85°C ambient |
Applications
| 2-Cell NiMH Powered Logic | Low-Power Camera I/O Supply |
|---|---|
Use Scenario: Powering 2.5V FPGA I/O banks or microcontroller peripherals from two NiMH cells (1.8V–3.0V). IC Role / Device Role / Timing Role: Primary regulated supply rail generator with automatic adaptation to declining battery voltage. Use Value: Eliminates need for separate LDO + boost IC; maintains stable 2.5V output down to 1.8V input without brownout. | Use Scenario: Providing clean 2.5V bias for CMOS image sensor analog front-end and interface logic. IC Role / Device Role / Timing Role: Low-noise, low-quiescent power supply with 20mVP-P ripple at 100mA. Use Value: Meets sensor analog section PSRR requirements while extending battery runtime via 65µA IQ. |
| PC Card Interface Power | Handheld Medical Sensor Node |
Use Scenario: Generating 2.5V for PCMCIA/CardBus interface circuitry in portable diagnostic equipment. IC Role / Device Role / Timing Role: Compact, single-chip solution meeting JEDEC voltage tolerance and transient response specs. Use Value: Achieves required load regulation (±15mV from 1mA to 60mA) in 4mm² footprint with no inductors. | Use Scenario: Supplying 2.5V to ultra-low-power MCU, BLE radio, and analog biosensor signal chain. IC Role / Device Role / Timing Role: Always-on supply with <1µA shutdown current and fast wake-up (<0.5ms turn-on time). Use Value: Enables multi-week battery life in intermittent-sampling wearable devices using standard coin cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up/step-down charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3204B-2.5 | Same 2.5V output, but no Burst Mode; higher IQ (48µA vs 65µA in no-load LDO mode); identical 6-lead DFN package | Suitable where predictable fixed-frequency operation is preferred over efficiency optimization at light loads | Select LTC3204B-2.5 if deterministic EMI profile is required; LTC3240EDC-2.5#TRPBF preferred for longest battery life |
| LTC3443 | Synchronous buck-boost topology; 2.4V–5.5V input; adjustable or fixed 2.4V/3.3V outputs; 600kHz switching; 96% peak efficiency | Higher current capability (up to 600mA), wider input range, but requires inductor and larger footprint | Choose LTC3443 only when >60mA output or tighter input voltage range (2.4V–5.5V) is needed; LTC3240EDC-2.5#TRPBF remains optimal for space-constrained 60mA designs |
Compared with LTC3204B-2.5, the LTC3240EDC-2.5#TRPBF delivers superior light-load efficiency via Burst Mode but trades off EMI predictability; versus LTC3443, it offers inductorless operation and smaller size at the cost of lower current and narrower input flexibility.
Availability
LTC3240EDC-2.5#TRPBF is available at Aetrix Electronics and suitable for battery-powered medical sensors, handheld instrumentation, PC card interfaces, and low-power camera modules requiring stable component supply with long-lifecycle support.
Supply support for LTC3240EDC-2.5#TRPBF 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 analog and power management portfolio.
The LTC3240 product line delivers compact, inductorless DC/DC conversion for space- and power-constrained portable electronics, emphasizing automatic mode adaptation and ceramic-capacitor simplicity.
FAQ
What is the maximum continuous output current for LTC3240EDC-2.5#TRPBF?
The LTC3240EDC-2.5#TRPBF delivers up to 60mA continuously while maintaining regulation within specification. This limit arises from its effective open-loop output resistance (ROL ≈ 8Ω at 1.8V input) and thermal constraints of the 2mm×2mm DFN package. At higher loads, output voltage droop exceeds ±4% or thermal shutdown may activate.
Does LTC3240EDC-2.5#TRPBF require an inductor?
No, the LTC3240EDC-2.5#TRPBF is an inductorless charge pump converter. It uses only three external ceramic capacitors: 1µF flying capacitor (C+ and C– pins), 1µF input bypass (VIN), and 4.7µF output filter (VOUT). This eliminates magnetic components, reducing EMI, cost, and board area compared to inductive buck-boost solutions.
How does LTC3240EDC-2.5#TRPBF switch between step-up and step-down modes?
The LTC3240EDC-2.5#TRPBF automatically switches based on input voltage relative to output: it operates as a low-dropout regulator when VIN ≥ VOUT + 100mV (i.e., ≥2.6V), and transitions to 1.2MHz voltage-doubling charge pump mode when VIN falls below that threshold. No external control is needed - the switch point is internally fixed and load-dependent hysteresis prevents oscillation.
What is the purpose of the exposed pad on LTC3240EDC-2.5#TRPBF?
The exposed pad (Pin 7) on the LTC3240EDC-2.5#TRPBF is electrically GND and thermally critical. It must be soldered to a PCB ground plane to achieve the specified thermal resistance (θJA = 80°C/W). Without this connection, junction temperature rise under load increases significantly, risking premature thermal shutdown or reduced reliability.
Can LTC3240EDC-2.5#TRPBF be used with input voltages below 1.8V?
No, the absolute minimum input voltage for LTC3240EDC-2.5#TRPBF is 1.8V per its Absolute Maximum Ratings and electrical specifications. Operation below 1.8V is not characterized and may result in failure to regulate, excessive dropout, or undefined behavior. For sub-1.8V operation, consider alternative solutions such as the LTC3443 or discrete LDO/boost combinations.
LTC3240EDC-2.5#TRPBF 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/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 150mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3240EDC-2.5#TRPBF FAQ
1.How can I place an order for LTC3240EDC-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3240EDC-2.5#TRPBF 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 LTC3240EDC-2.5#TRPBF reliable?
The price and inventory of LTC3240EDC-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3240EDC-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3240EDC-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3240EDC-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3240EDC-2.5#TRPBF?
LTC3240EDC-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3240EDC-2.5#TRPBF 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 LTC3240EDC-2.5#TRPBF?
For technical support, including LTC3240EDC-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3240EDC-2.5#TRPBF requirements.
6.How does Aetrix verify that LTC3240EDC-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3240EDC-2.5#TRPBF 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 LTC3240EDC-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3240EDC-2.5#TRPBF?
All LTC3240EDC-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3240EDC-2.5#TRPBF, 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 LTC3240EDC-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3240EDC-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3240EDC-2.5#TRPBF 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…
