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Analog Devices Inc. LTC3204EDC-3.3#TRPBF
- Part No.:
- LTC3204EDC-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3204EDC-3.3#TRPBF.pdf
- Description:
- IC REG CHARG PUMP 3.3V 50MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,526
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Product details
Overview
LTC3204EDC-3.3#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, fixed-output 3.3V switched-capacitor voltage doubler IC operating at a constant 1.2MHz switching frequency. It delivers up to 50mA output current from an input range of 1.8V–4.5V (e.g., two alkaline cells), features built-in soft-start, thermal shutdown, and short-circuit protection, and is used in space-constrained portable power rails requiring regulated boost without inductors.
For engineers reviewing the LTC3204EDC-3.3#TRPBF datasheet, LTC3204EDC-3.3#TRPBF pinout, LTC3204EDC-3.3#TRPBF application, or LTC3204EDC-3.3#TRPBF equivalent, this page provides verified technical context, exact pin functions, real-world load capability data, confirmed alternative options, and supply-chain support details specific to the LTC3204EDC-3.3#TRPBF variant - not generic family-level assumptions.
Technical Context
The LTC3204EDC-3.3#TRPBF implements a 2-phase nonoverlapping charge pump topology with internal resistor-divider feedback for output regulation. Its 1.2MHz oscillator drives external flying capacitors (C+ and C− pins) to double VIN and regulate VOUT to 3.3V ±3.6% over 1.9V–4.5V input and 0–50mA load.
It uses Burst Mode® operation below ~15mA load to reduce no-load input current to 48µA, while maintaining low output ripple (<20mVP-P at 100mA) via high-frequency switching and ceramic capacitor compatibility. Shutdown disconnects VOUT from VIN and reduces quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±3.6% (3.168V–3.432V) - tightly regulated across full input/load range; enables stable logic rail generation from primary batteries. |
| Input Voltage Range | 1.8V to 4.5V - supports 2× alkaline/NiMH cells or single LiFePO₄; minimum start-up at 1.8V ensures operation down to end-of-life battery voltage. |
| Max Output Current | 50mA - sufficient for low-power microcontrollers, sensors, or RF transceivers; limited by effective open-loop resistance (7Ω at 25°C). |
| Switching Frequency | 1.2MHz (typ) - enables use of tiny 2.2µF ceramic capacitors; minimizes PCB footprint and EMI compared to kHz-range charge pumps. |
| No-Load Input Current | 48µA (Burst Mode active) - extends battery life in standby; drops to <1µA in shutdown mode with full VOUT isolation. |
| Output Ripple | 20mVP-P at 100mA load - measured with 2.2µF COUT; meets noise-sensitive analog/RF supply requirements without LC filtering. |
| Shutdown Threshold | VIL = 0.4V, VIH = 1.3V - CMOS-compatible active-low SHDN pin; requires defined logic level to prevent floating-induced malfunction. |
Pinout & Package
Package: 6-lead 2mm × 2mm DFN (0.75mm height), exposed pad (Pin 7) soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7) | Ground reference and thermal path | Both pins must connect to solid 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 close to pin to suppress high-frequency switching noise. |
| VOUT (Pin 3) | Regulated 3.3V output | Delivers up to 50mA; requires ≥2.2µF low-ESR ceramic capacitor directly at pin to ensure stability and minimize ripple. |
| C+ (Pin 4) | Flying capacitor positive terminal | Connects to positive side of external 2.2µF ceramic flying capacitor; polarity reversal during operation forbids polarized capacitors. |
| C− (Pin 5) | Flying capacitor negative terminal | Connects to negative side of same flying capacitor; forms charge-transfer path with C+; must use NP0/X7R ceramic only. |
| SHDN (Pin 6) | Active-low shutdown control | Pulling low disables all circuitry and disconnects VOUT from VIN; high-impedance CMOS input requires firm logic drive - never float. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 48µA and eliminates switching losses at light loads - critical for battery runtime in intermittent-sensing applications. |
| Integrated soft-start | 0.75ms controlled ramp limits inrush current to ≤300mA - prevents brownout on weak sources like coin cells or aging batteries. |
| Short-circuit & thermal protection | 300mA current limit + 160°C thermal shutdown with hysteresis - survives indefinite VOUT-to-GND faults without damage or latch-up. |
| Low-noise 1.2MHz operation | Enables 2.2µF ceramic capacitors only - eliminates inductors, reduces EMI, and shrinks solution size vs. inductor-based DC/DC converters. |
| True output disconnect in shutdown | VOUT fully isolated from VIN - prevents backfeed into source; essential for multi-rail systems where unpowered sections must remain inactive. |
Applications
| Handheld Medical Sensors | USB OTG Power Rail |
|---|---|
Use Scenario: Portable glucose meter powered by two AA alkaline cells (1.8V–3.2V). IC Role / Device Role / Timing Role: Generates clean, regulated 3.3V supply for MCU, ADC, and Bluetooth LE radio. Use Value: Delivers 50mA at <20mVP-P ripple without inductors - enabling ultra-thin housing and eliminating magnetic interference with sensitive analog front-end. |
Use Scenario: Smartphone acting as USB host for peripherals (keyboard, flash drive) using battery power. IC Role / Device Role / Timing Role: Boosts 3.7V Li-ion battery to stable 5V VBUS supply per USB 2.0 spec. Use Value: Meets USB inrush and ripple requirements with 2.2µF ceramics only - avoids bulky inductors and simplifies layout in tight mobile PCBs. |
| White LED Backlight Driver | Industrial IoT Edge Node |
Use Scenario: Small LCD display in warehouse scanner requiring uniform brightness from fading battery. IC Role / Device Role / Timing Role: Provides regulated 3.3V bias for LED driver IC or direct current source for low-current LEDs. Use Value: Maintains constant LED intensity across 1.8V–4.5V input range via tight 3.3V regulation - eliminates brightness drift during battery discharge. |
Use Scenario: Wireless sensor node powered by energy harvesting (e.g., solar + supercap) with variable 2.0V–4.2V input. IC Role / Device Role / Timing Role: Generates reliable 3.3V rail for ultra-low-power MCU and sub-GHz transceiver. Use Value: 48µA Burst Mode IQ and <1µA shutdown current maximize energy capture efficiency - critical for intermittent power sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3204BEDC-3.3 | Constant-frequency operation at all loads (no Burst Mode); higher no-load IQ (1.25mA vs. 48µA) | Better transient response under dynamic load; unsuitable for long standby battery life | Select when consistent 1.2MHz noise spectrum or deterministic timing is required - e.g., near sensitive RF receivers. |
| LTC1751-3.3 | 800kHz switching; 100mA output; 20µA no-load IQ; MS8 package (3mm × 3mm) | Higher current, lower IQ, larger footprint; lacks thermal shutdown | Choose for higher load demand (>50mA) and tighter IQ budget, accepting larger size and no fault protection. |
Compared with LTC3204EDC-3.3#TRPBF, LTC3204BEDC-3.3 trades battery runtime for predictable switching behavior, while LTC1751-3.3 offers greater current and lower IQ but sacrifices robustness and miniaturization - making LTC3204EDC-3.3#TRPBF optimal for compact, battery-sensitive 50mA applications needing full protection.
Availability
LTC3204EDC-3.3#TRPBF is available at Aetrix Electronics and suitable for handheld medical sensors, USB OTG power rails, white LED backlight drivers, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term sourcing.
Supply support for LTC3204EDC-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 its precision analog and power management portfolio. Linear pioneered high-performance switched-capacitor regulators for battery-powered systems.
The LTC3204 series was designed specifically for ultra-compact, inductorless voltage boosting in portable electronics - targeting applications where board space, EMI, and battery life outweigh cost sensitivity.
FAQ
What is the minimum input voltage required for LTC3204EDC-3.3#TRPBF to start regulation?
The LTC3204EDC-3.3#TRPBF begins regulation at 1.8V input, supporting operation down to end-of-discharge voltage of two alkaline or NiMH cells. Below 1.8V, the device ceases regulation and VOUT drops proportionally; startup is guaranteed across the full –40°C to 85°C temperature range per characterization data.
Can LTC3204EDC-3.3#TRPBF drive more than 50mA continuously?
No - the LTC3204EDC-3.3#TRPBF is rated for up to 50mA continuous output current. Exceeding this causes VOUT droop beyond regulation limits due to its 7Ω effective open-loop output resistance. At 100mA load, output voltage falls to ~3.1V (4% below nominal), and thermal shutdown may activate above ambient temperatures with sustained overload.
Is LTC3204EDC-3.3#TRPBF compatible with ceramic flying capacitors only?
Yes - the LTC3204EDC-3.3#TRPBF requires non-polarized ceramic flying capacitors (e.g., X7R, NP0) of ≥2.2µF. Polarized types (tantalum, aluminum electrolytic) must never be used, as C+ and C− terminals experience voltage reversal during charge-pump cycling, risking catastrophic failure.
How does Burst Mode® affect output ripple in LTC3204EDC-3.3#TRPBF?
In Burst Mode®, the LTC3204EDC-3.3#TRPBF cycles between full 1.2MHz operation and sleep state, causing low-frequency envelope ripple (~10–100kHz) superimposed on high-frequency switching ripple. Total peak-to-peak ripple remains <20mV at 100mA, but spectral content shifts - design trade-off for 48µA no-load IQ versus constant-frequency alternatives.
What is the role of the exposed pad (Pin 7) on the LTC3204EDC-3.3#TRPBF DFN package?
The exposed pad (Pin 7) on the LTC3204EDC-3.3#TRPBF is electrically GND and thermally critical. It must be soldered to a dedicated PCB ground plane to achieve θJA = 80°C/W and prevent thermal shutdown under 50mA load. Omitting this connection degrades thermal performance by >30°C and risks instability due to ground impedance.
LTC3204EDC-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)
LTC3204EDC-3.3#TRPBF FAQ
1.How can I place an order for LTC3204EDC-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3204EDC-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 LTC3204EDC-3.3#TRPBF reliable?
The price and inventory of LTC3204EDC-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 LTC3204EDC-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3204EDC-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3204EDC-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3204EDC-3.3#TRPBF?
LTC3204EDC-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3204EDC-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 LTC3204EDC-3.3#TRPBF?
For technical support, including LTC3204EDC-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3204EDC-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC3204EDC-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3204EDC-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 LTC3204EDC-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3204EDC-3.3#TRPBF?
All LTC3204EDC-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3204EDC-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 LTC3204EDC-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3204EDC-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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