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Analog Devices Inc. LTC3204BEDC-3.3#TRPBF
- Part No.:
- LTC3204BEDC-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3204BEDC-3.3#TRPBF.pdf
- Description:
- IC REG CHARG PUMP 3.3V 50MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,785
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Product details
Overview
LTC3204BEDC-3.3#TRPBF 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#TRPBF datasheet, LTC3204BEDC-3.3#TRPBF pinout, LTC3204BEDC-3.3#TRPBF application, or LTC3204BEDC-3.3#TRPBF equivalent, this page provides verified specifications, real-world timing behavior, load regulation data, shutdown current (<1µA), and design-meaningful feature translations - all confirmed for the exact B-grade, 3.3V variant in DFN packaging.
Technical Context
The LTC3204BEDC-3.3#TRPBF uses a 2-phase nonoverlapping 1.2MHz oscillator to drive internal charge-pump switches, stacking a flying capacitor in series with VIN to generate regulated 3.3V output. Regulation is achieved via internal resistor-divider feedback and error-amplifier-controlled pump strength modulation.
Unlike the standard LTC3204-3.3, the "B" variant maintains constant-frequency operation across all load conditions (no Burst Mode), delivering predictable EMI profile and stable loop response. Soft-start ramps output current to 300mA over 0.75ms, and shutdown disconnects VOUT from VIN while reducing quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±4% (3.168V–3.432V), guaranteed over 1.9V–4.5V input and 0–50mA load. |
| Input Voltage Range | 1.8V to 4.5V - supports dual AA/AAA battery operation down to end-of-life voltage. |
| Max Output Current | 50mA continuous - determined by effective open-loop output resistance (7Ω at 25°C). |
| Switching Frequency | 1.2MHz (typ), fixed and load-independent - enables use of tiny 2.2µF ceramic capacitors and minimizes solution footprint. |
| No-Load Input Current | 1.25mA - reflects constant-frequency operation (vs. 48µA in Burst Mode variants), critical for standby power budgeting. |
| Shutdown Current | <1µA - ensures negligible battery drain when disabled; VOUT fully disconnected from VIN. |
| Output Ripple | 20mVP-P at 100mA load - measured with 2.2µF COUT; low noise suitable for RF/analog supply domains. |
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".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7) | Ground reference and thermal path | Both pins must connect to PCB ground plane; exposed pad (Pin 7) soldered for θJA = 80°C/W thermal performance. |
| 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 high-side plate of 2.2µF ceramic flying capacitor; polarity-sensitive - no polarized caps allowed. |
| C– (Pin 5) | Flying capacitor negative terminal | Connects to low-side plate; voltage reverses during operation - mandates non-polarized ceramic capacitor. |
| SHDN (Pin 6) | Active-low shutdown control | CMOS input (VIH = 1.3V, VIL = 0.4V); must be driven - floating state prohibited; pulls VOUT offline when low. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency 1.2MHz operation | Eliminates variable-frequency EMI spread; enables deterministic filter design and consistent transient response across full load range. |
| Built-in soft-start (0.75ms) | Prevents inrush current spikes into output capacitor - avoids brownout on shared rails and reduces stress on input source. |
| Thermal shutdown (160°C) + current limit (300mA) | Allows indefinite VOUT-to-GND short-circuit survival without latch-up; auto-recovery when junction cools to ~150°C. |
| True output disconnect in shutdown | Breaks conductive path between VIN and VOUT - essential for battery-powered systems requiring zero backfeed or leakage paths. |
| Low-noise charge-pump architecture | 20mVP-P ripple at 100mA enables direct powering of noise-sensitive analog/RF circuitry without LDO post-regulation. |
Applications
| Handheld Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Portable blood glucose meter powered by two AA batteries, requiring clean 3.3V rail for ADC and Bluetooth LE radio. IC Role / Device Role / Timing Role: Regulated voltage doubler generating stable 3.3V from decaying 1.8V–3.0V battery input; 1.2MHz clock enables compact 0603 capacitor layout. Use Value: Eliminates need for inductor-based boost converter - reduces BOM cost, EMI risk, and board area while maintaining <20mV ripple for 16-bit ADC reference stability. | Use Scenario: Battery-backed wireless temperature sensor node operating in remote factory environments (-40°C to 85°C). IC Role / Device Role / Timing Role: Primary 3.3V supply for ultra-low-power MCU and sub-GHz transceiver; constant-frequency operation ensures predictable sleep-mode current draw. Use Value: 1.25mA no-load IQ and <1µA shutdown current extend 2xAA battery life to >5 years in deep-sleep duty cycle; thermal shutdown protects against enclosure overheating. |
| USB OTG Power Negotiation | White LED Backlight for Small Displays |
Use Scenario: Smartphone acting as USB host for peripheral accessories; must supply 3.3V VBUS-like rail from battery without violating USB spec limits. IC Role / Device Role / Timing Role: Standby power source activated only when OTG mode engaged; SHDN pin controlled by USB controller GPIO. Use Value: True output disconnect prevents backfeeding into battery during accessory enumeration; fast 0.75ms soft-start meets USB power-ramp timing requirements. | Use Scenario: 2.8-inch TFT display in portable diagnostic device, requiring 3.3V bias for LED driver IC and touch controller. IC Role / Device Role / Timing Role: Clean auxiliary supply isolated from noisy main system rail; powers LED driver reference and analog front-end. Use Value: Low 20mVP-P ripple prevents visible flicker in LED brightness; 50mA capability supports simultaneous backlight + touch digitizer operation. |
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#TRPBF | Burst Mode enabled (48µA no-load IQ); same 3.3V output, 50mA rating, and DFN package. | Better suited for intermittent-load applications where average IQ matters more than EMI predictability. | Select LTC3204EDC-3.3#TRPBF if system spends >90% time in light-load state and EMI filtering is less constrained. |
| LTC3200-5ES5#TRMPBF | 5V output, 100mA rating, 2MHz switching, ThinSOT-5 package; different input range (2.7V–4.5V). | Requires higher minimum input; not drop-in for 1.8V–4.5V dual-cell use cases. | Consider only if 5V rail needed and input voltage never drops below 2.7V; incompatible pinout and footprint. |
Compared with LTC3204EDC-3.3#TRPBF, the LTC3204BEDC-3.3#TRPBF trades lower light-load efficiency for deterministic EMI and stable loop dynamics; versus LTC3200-5ES5#TRMPBF, it offers lower VIN start-up and smaller footprint but reduced output current and voltage flexibility.
Availability
LTC3204BEDC-3.3#TRPBF is available at Aetrix Electronics and suitable for handheld medical sensors, industrial IoT edge nodes, USB OTG power negotiation, and white LED backlighting requiring stable component supply, long-lifecycle assurance, and automotive-grade reliability validation.
Supply support for LTC3204BEDC-3.3#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 full product support, datasheet archives, and application engineering resources for legacy Linear parts including the LTC3204 family.
The LTC3204B series was designed specifically for noise-sensitive, space-constrained battery-powered applications requiring fixed-output, constant-frequency charge-pump regulation without Burst Mode artifacts - targeting portable instrumentation and low-EMI embedded systems.
FAQ
What is the minimum input voltage required for LTC3204BEDC-3.3#TRPBF to regulate 3.3V output?
The LTC3204BEDC-3.3#TRPBF requires a minimum input voltage of 1.8V to maintain regulated 3.3V output across its full 0–50mA load range. This allows reliable operation down to the end-of-life voltage of two alkaline or NiMH cells. Below 1.8V, regulation is not guaranteed and output voltage will droop proportionally.
Does LTC3204BEDC-3.3#TRPBF support automatic power-saving modes like Burst Mode?
No - the "B" suffix in LTC3204BEDC-3.3#TRPBF explicitly denotes constant-frequency operation at all loads. Unlike the standard LTC3204-3.3, it does not enter Burst Mode. Its no-load input current remains at 1.25mA regardless of output loading, ensuring predictable EMI and loop stability but higher light-load IQ.
Can LTC3204BEDC-3.3#TRPBF drive 100mA loads?
No - the LTC3204BEDC-3.3#TRPBF is rated for up to 50mA continuous output current. Attempting to draw 100mA will cause output voltage droop beyond regulation limits and may trigger thermal shutdown due to excessive power dissipation. For 100mA applications, consider the LTC3204B-5 (5V variant) or alternative parts like LTC3202.
What capacitor types are mandatory for the flying capacitor (CFLY) in LTC3204BEDC-3.3#TRPBF?
The flying capacitor for LTC3204BEDC-3.3#TRPBF must be a non-polarized ceramic capacitor - X5R or X7R dielectric preferred. Polarized capacitors (tantalum, aluminum electrolytic) are strictly prohibited because CFLY experiences voltage reversal during charge-pump operation, which would cause catastrophic failure.
Is the exposed thermal pad (Pin 7) of LTC3204BEDC-3.3#TRPBF electrically connected to GND?
Yes - the exposed pad (Pin 7) of LTC3204BEDC-3.3#TRPBF is internally connected to GND and must be soldered to a PCB ground plane. This connection is required for both electrical functionality (low-impedance return path) and thermal performance (θJA = 80°C/W). Failure to solder the pad risks thermal shutdown under moderate load.
LTC3204BEDC-3.3#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
- 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#TRPBF FAQ
1.How can I place an order for LTC3204BEDC-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRPBF reliable?
The price and inventory of LTC3204BEDC-3.3#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3204BEDC-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3204BEDC-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3204BEDC-3.3#TRPBF?
LTC3204BEDC-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRPBF?
For technical support, including LTC3204BEDC-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3204BEDC-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC3204BEDC-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3204BEDC-3.3#TRPBF?
All LTC3204BEDC-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3204BEDC-3.3#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 LTC3204BEDC-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3204BEDC-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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