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Analog Devices Inc. LTC3204BEDC-3.3#TRMPBF
- Part No.:
- LTC3204BEDC-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3204BEDC-3.3#TRMPBF.pdf
- Description:
- IC REG CHARG PUMP 3.3V 50MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
LTC3204BEDC-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed 3.3V, low-noise, constant-frequency switched-capacitor voltage doubler IC. It delivers up to 50mA output from 1.8V–4.5V input (e.g., two alkaline cells), operates at 1.2MHz switching frequency, and features built-in soft-start, thermal shutdown, and short-circuit protection in a 2mm × 2mm DFN package.
For engineers reviewing the LTC3204BEDC-3.3#TRMPBF datasheet, LTC3204BEDC-3.3#TRMPBF pinout, LTC3204BEDC-3.3#TRMPBF application, or LTC3204BEDC-3.3#TRMPBF equivalent, this page provides verified specifications, package details, real-world use cases, and validated alternative parts for battery-powered portable systems requiring regulated 3.3V from low-input sources.
Technical Context
The LTC3204BEDC-3.3#TRMPBF uses a 2-phase nonoverlapping 1.2MHz oscillator to drive an internal charge pump with flying capacitor (C+ and C− terminals). Regulation is achieved via internal resistor-divider feedback and current-modulated pump strength - not PWM or hysteretic control.
Unlike the Burst Mode® LTC3204-3.3 variant, the "B" suffix denotes constant-frequency operation across all load conditions (0–50mA), eliminating audible noise and output ripple modulation at light loads. Shutdown disconnects VOUT from VIN and reduces quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.6% (3.168V–3.432V) under 1.9V–4.5V input and ≤50mA load - ensures stable logic-level supply for microcontrollers and sensors. |
| Input Voltage Range | 1.8V to 4.5V - supports 2× alkaline (fresh to depleted), NiMH, or single LiFePO₄ cells without external LDO pre-regulation. |
| Max Output Current | 50mA continuous - sufficient for powering low-power MCUs, RF transceivers, or sensor interfaces in space-constrained designs. |
| Switching Frequency | 1.2MHz (typ), 0.6–1.8MHz (min–max) - enables use of tiny 2.2µF ceramic capacitors, minimizing PCB area vs. inductor-based solutions. |
| Shutdown Current | <1µA - preserves battery life during system sleep modes; VOUT fully disconnected from VIN. |
| Output Ripple | 20mVP-P at 100mA load - measured with 2.2µF COUT; low enough for analog sensor biasing or clean MCU VDD. |
| Soft-Start Time | 0.75ms - limits inrush current into output capacitor, preventing input rail droop during power-up. |
Pinout & Package
Package: 6-lead 2mm × 2mm plastic DFN (0.75mm height), exposed pad (Pin 7) tied to GND for thermal and electrical performance. Pin 1 marked with bar; top-side marking "LBVF" per ordering information.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7) | Ground reference and thermal path | Both pins must be soldered to PCB ground plane; exposed pad (Pin 7) is mandatory for thermal management and noise reduction. |
| VIN (Pin 2) | Main input supply | Accepts 1.8V–4.5V; requires ≥1µF low-ESR ceramic bypass capacitor placed adjacent to pin. |
| VOUT (Pin 3) | Regulated 3.3V output | Delivers up to 50mA; requires ≥2.2µF low-ESR ceramic capacitor directly at pin for stability and ripple control. |
| C+ (Pin 4) | Flying capacitor positive terminal | Connects to positive side of 2.2µF ceramic flying capacitor; polarity-sensitive - reverse voltage must be avoided. |
| C− (Pin 5) | Flying capacitor negative terminal | Connects to negative side of same flying capacitor; forms charge-transfer path with C+ during 2-phase switching cycle. |
| SHDN (Pin 6) | Active-low shutdown control | Logic low (<0.4V) disables device and disconnects VOUT; high (>1.3V) enables operation; must never float. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency 1.2MHz operation | Eliminates load-dependent frequency shifting - critical for EMI filtering predictability and avoiding audio-band noise in handheld devices. |
| Integrated soft-start | Ramps output current limit from 0 to 300mA over 0.75ms - prevents input voltage sag and avoids false brown-out detection in host systems. |
| Thermal + short-circuit protection | Auto-restarts after junction cools from >160°C shutdown; limits output to ~300mA during VOUT-to-GND fault - enables robust field operation without external fusing. |
| True output disconnect in shutdown | VOUT is electrically isolated from VIN - prevents backfeed into source and leakage into powered-down subsystems. |
| Low-noise charge-pump architecture | No inductors or magnetic components - eliminates EMI from switching inductors and simplifies layout in noise-sensitive RF or audio sections. |
Applications
| Portable Medical Sensors | Industrial Handheld Terminals |
|---|---|
Use Scenario: Battery-powered pulse oximeter using dual AA cells (1.8V–3.2V) to power an ADC, optical driver, and BLE radio. IC Role / Device Role / Timing Role: Provides clean, regulated 3.3V rail for analog front-end and digital logic; replaces inefficient linear regulator to extend runtime. Use Value: Enables full-system operation down to 1.8V input while maintaining 3.3V ±3.6% accuracy - extends usable battery range by ~25% vs. LDO-based solution. | Use Scenario: Ruggedized barcode scanner with cold-temperature operation requirement (–40°C to 85°C). IC Role / Device Role / Timing Role: Generates stable 3.3V supply for CMOS image sensor and ARM Cortex-M4 MCU from NiMH pack. Use Value: Guaranteed performance across –40°C to 85°C (per design correlation); DFN package withstands mechanical shock better than SOIC alternatives. |
| USB OTG Power Negotiation | Low-Power IoT Edge Node |
Use Scenario: USB On-The-Go accessory that acts as host when connected to smartphone, drawing power from its 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Steps up battery voltage to 3.3V for USB PHY and microcontroller; supports dynamic enable/disable via SHDN pin during enumeration. Use Value: 1.2MHz switching allows compact 0603 ceramic caps; <1µA shutdown current meets USB battery-life requirements for unattended standby. | Use Scenario: Wireless environmental sensor node powered by two AA cells, transmitting data every 5 minutes via sub-GHz RF. IC Role / Device Role / Timing Role: Supplies regulated 3.3V only during active transmit/receive bursts; remains in shutdown between intervals. Use Value: Constant-frequency operation avoids burst-mode ripple artifacts that could interfere with RF receiver sensitivity; 50mA peak supports RF PA drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge-pump voltage doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3204EDC-3.3#TRMPBF | Burst Mode® operation (not constant frequency); 48µA no-load IQ vs. 1.25mA for LTC3204BEDC-3.3#TRMPBF | Better light-load efficiency but introduces variable-frequency ripple - unsuitable where EMI or audio noise matters | Select LTC3204EDC-3.3#TRMPBF only if ultra-low quiescent current dominates over ripple/noise constraints. |
| LTC3200-3.3#TRMPBF | 2MHz switching, 100mA output, wider input (2V–5V), but higher 3.5mA no-load IQ and no thermal shutdown | Higher output capability and speed, but lacks overtemperature protection and has larger minimum input voltage | Choose LTC3200-3.3#TRMPBF only when >50mA load or faster transient response is required and thermal margin is assured. |
Compared with LTC3204EDC-3.3#TRMPBF, LTC3204BEDC-3.3#TRMPBF trades 1.2mA higher no-load current for deterministic 1.2MHz ripple and immunity to burst-mode artifacts; versus LTC3200-3.3#TRMPBF, it offers lower minimum input voltage (1.8V), integrated thermal protection, and smaller solution size at the cost of reduced max output current.
Availability
LTC3204BEDC-3.3#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, USB OTG accessories, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3204BEDC-3.3#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, datasheets, and application engineering for legacy Linear parts including the LTC series.
The LTC3204 family was designed specifically for space-constrained, battery-powered systems needing efficient, inductorless voltage boosting - targeting handheld, medical, and portable instrumentation where EMI, size, and input voltage range are critical.
FAQ
What is the minimum input voltage required for LTC3204BEDC-3.3#TRMPBF to regulate 3.3V?
The LTC3204BEDC-3.3#TRMPBF requires a minimum input voltage of 1.8V to maintain regulation at 3.3V output under load. This enables reliable operation from two fresh or partially discharged alkaline cells, and is specified across the full –40°C to 85°C temperature range per design correlation data.
Does LTC3204BEDC-3.3#TRMPBF include thermal protection?
Yes, LTC3204BEDC-3.3#TRMPBF includes thermal shutdown circuitry that disables the charge pump when junction temperature exceeds ~160°C. It automatically recovers when temperature falls to ~150°C, allowing safe cyclic operation during sustained overload or high ambient conditions without latch-up.
Can LTC3204BEDC-3.3#TRMPBF drive more than 50mA continuously?
No - LTC3204BEDC-3.3#TRMPBF is rated for up to 50mA continuous output current. Attempting higher loads causes output voltage droop beyond regulation limits and may trigger thermal shutdown. For >50mA, consider LTC3200-3.3#TRMPBF (100mA) or redesign with external pass element.
Is the exposed pad on LTC3204BEDC-3.3#TRMPBF electrically connected?
Yes - the exposed pad (Pin 7) on LTC3204BEDC-3.3#TRMPBF is internally connected to GND and must be soldered to the PCB ground plane. This connection is mandatory for both thermal performance (θJA = 80°C/W) and electrical noise suppression; floating or unconnected pads violate Absolute Maximum Ratings.
What capacitor types are recommended for CFLY, CIN, and COUT with LTC3204BEDC-3.3#TRMPBF?
Low-ESR ceramic capacitors (X5R/X7R dielectric) are required for all three positions: CFLY = 2.2µF, CIN ≥ 1µF, COUT ≥ 2.2µF. Tantalum or aluminum electrolytics must be avoided - especially for CFLY, where reverse voltage during startup would cause catastrophic failure. 0603 case size is typical and supported by the DFN layout.
LTC3204BEDC-3.3#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:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50mA
- 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)
LTC3204BEDC-3.3#TRMPBF FAQ
1.How can I place an order for LTC3204BEDC-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRMPBF reliable?
The price and inventory of LTC3204BEDC-3.3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3204BEDC-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3204BEDC-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3204BEDC-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3204BEDC-3.3#TRMPBF?
LTC3204BEDC-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRMPBF?
For technical support, including LTC3204BEDC-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3204BEDC-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC3204BEDC-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3204BEDC-3.3#TRMPBF?
All LTC3204BEDC-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3204BEDC-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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