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Analog Devices Inc. LTC3204EDC-3.3#TRMPBF
- Part No.:
- LTC3204EDC-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3204EDC-3.3#TRMPBF.pdf
- Description:
- IC REG CHARG PUMP 3.3V 50MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:726
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Product details
Overview
LTC3204EDC-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a low-noise, constant-frequency (1.2 MHz) switched-capacitor voltage doubler IC delivering a regulated 3.3 V output from 1.8 V to 4.5 V input. It supports up to 50 mA load current, features built-in soft-start and thermal/short-circuit protection, and is used in compact battery-powered systems such as handheld devices and USB OTG power rails.
For engineers reviewing the LTC3204EDC-3.3#TRMPBF datasheet, LTC3204EDC-3.3#TRMPBF pinout, LTC3204EDC-3.3#TRMPBF application, or LTC3204EDC-3.3#TRMPBF equivalent, key selection criteria include input voltage range (1.8–4.5 V), regulated 3.3 V output tolerance (±4%), shutdown current (<1 µA), Burst Mode® operation (IQ = 48 µA), and DFN-6 (2 mm × 2 mm) package compatibility with space-constrained PCB layouts.
Technical Context
The LTC3204EDC-3.3#TRMPBF implements a two-phase nonoverlapping charge pump topology with internal resistor-divider feedback for regulation. Its 1.2 MHz fixed-frequency oscillator enables use of small 2.2 µF ceramic flying and output capacitors, minimizing solution footprint while maintaining low output ripple (20 mVP-P at 100 mA).
Burst Mode® operation automatically engages below ~15 mA load to reduce quiescent current to 48 µA; above threshold, it operates continuously at 1.2 MHz. Shutdown disconnects VOUT from VIN and reduces supply current to <1 µA, with CMOS-compatible SHDN pin (VIH = 1.3 V, VIL = 0.4 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±4% (3.168–3.432 V), tightly regulated across 1.9–4.5 V input and 0–50 mA load |
| Input Voltage Range | 1.8 V to 4.5 V - supports two alkaline cells (2×AA) or single LiFePO₄ cell |
| Max Output Current | 50 mA - limited by effective open-loop output resistance (7 Ω at TA = 25°C) |
| Switching Frequency | 1.2 MHz (typ) - enables use of 0603-size 2.2 µF ceramic capacitors; no inductors required |
| Quiescent Current | 48 µA in Burst Mode® at no load - extends battery life in intermittent-use applications |
| Shutdown Current | <1 µA - isolates load from input rail; essential for zero-power standby states |
| Output Ripple | 20 mVP-P at 100 mA load - meets noise-sensitive analog and RF subsystem requirements |
Pinout & Package
Package: 6-lead, 2 mm × 2 mm, 0.75 mm height DFN with exposed thermal pad (Pin 7 = GND). Requires soldering of exposed pad to PCB ground plane 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 PCB ground plane; exposed pad (Pin 7) is mandatory for thermal management and noise reduction |
| VIN (Pin 2) | Main input supply | Accepts 1.8–4.5 V; requires ≥1 µF low-ESR ceramic bypass capacitor placed adjacent to pin |
| VOUT (Pin 3) | Regulated 3.3 V output | Delivers up to 50 mA; requires ≥2.2 µF low-ESR ceramic capacitor with ESR < 0.1 Ω for stability and ripple control |
| C+ (Pin 4) | Flying capacitor positive terminal | Connects to positive side of 2.2 µF ceramic flying capacitor; polarity reversal prohibited - only non-polarized ceramics allowed |
| C− (Pin 5) | Flying capacitor negative terminal | Connects to negative side of same flying capacitor; forms charge-transfer path during 1.2 MHz switching cycle |
| SHDN (Pin 6) | Active-low enable control | Logic low (<0.4 V) disables device and disconnects VOUT; must be driven - floating state is undefined and prohibited |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise 1.2 MHz charge pump | Eliminates magnetic components and associated EMI; achieves 20 mVP-P ripple at full load without LC filtering |
| Built-in soft-start | Ramps output current from 0 to 300 mA over 0.75 ms - prevents inrush into large output caps and avoids input rail droop |
| Thermal + short-circuit protection | Auto-restarts after junction cools from >160°C shutdown; limits output to 300 mA during sustained VOUT-to-GND fault |
| True load disconnect in shutdown | VOUT is electrically isolated from VIN - critical for preventing backfeed in multi-rail battery systems |
| Optimized for miniature layout | DFN-6 (2 mm × 2 mm) footprint with all passives in 0603 size enables total solution area < 12 mm² |
Applications
| Handheld Medical Sensors | USB OTG Power Rail |
|---|---|
Use Scenario: Portable glucose meters or pulse oximeters powered by two AA alkaline cells (1.8–3.2 V). IC Role / Device Role / Timing Role: Regulated 3.3 V supply for MCU, ADC, and Bluetooth LE radio. Use Value: Enables direct two-cell operation without boost converter complexity; Burst Mode® extends battery life beyond 6 months in sleep-dominated usage. | Use Scenario: Smartphone acting as USB host for peripherals (keyboard, flash drive) using its internal battery. IC Role / Device Role / Timing Role: Generates stable 3.3 V VBUS-equivalent rail compliant with USB 2.0 OTG specification. Use Value: Meets USB OTG voltage tolerance (3.0–3.6 V) with <1% line/load regulation; shutdown current <1 µA preserves host battery during idle. |
| Industrial IoT Edge Node | Low-Power Display Backlight |
Use Scenario: Battery-operated wireless sensor node with LoRaWAN transceiver and 3.3 V microcontroller. IC Role / Device Role / Timing Role: Primary 3.3 V system rail sourced from primary Li-SOCl₂ or alkaline battery pack. Use Value: Operates down to 1.8 V input - maximizes usable battery capacity; thermal protection ensures reliability in unventilated enclosures. | Use Scenario: Monochrome LCD display in smart thermostat or building control panel powered by coin cell or 2×AA. IC Role / Device Role / Timing Role: Supplies regulated 3.3 V to display controller IC and LED bias circuitry. Use Value: Low 20 mVP-P ripple prevents visible flicker; DFN-6 package allows placement directly behind display module for minimal trace length. |
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#TRMPBF | Constant-frequency operation at all loads (no Burst Mode®); higher no-load IQ (1.25 mA vs. 48 µA) | Better for noise-sensitive audio or RF circuits requiring deterministic 1.2 MHz spectrum; unsuitable for ultra-low-power wake-on-event designs | Select when spectral purity outweighs battery life; verify thermal derating at full load due to higher quiescent dissipation |
| LTC3200-3.3#TRMPBF | 2 MHz switching frequency; 100 mA output capability; wider input range (2.0–5.5 V); no Burst Mode® | Supports higher current and broader input sources (e.g., 3.3 V LDO-fed systems); requires smaller 1 µF flying cap but generates higher-frequency noise | Choose for higher output current or tighter board space; confirm EMI filter requirements for 2 MHz harmonics in sensitive environments |
Compared with LTC3204EDC-3.3#TRMPBF, LTC3204BEDC-3.3#TRMPBF trades ultra-low IQ for deterministic noise profile, while LTC3200-3.3#TRMPBF offers double the current and frequency at the cost of higher static power and reduced low-VIN capability - making LTC3204EDC-3.3#TRMPBF optimal for long-life, dual-AA, 50 mA applications.
Availability
LTC3204EDC-3.3#TRMPBF is available at Aetrix Electronics and suitable for handheld medical sensors, USB OTG power rails, industrial IoT edge nodes, and low-power display backlighting requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3204EDC-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 LTC3204 series.
The LTC3204 family was designed specifically for space-constrained, battery-powered systems needing regulated voltage doubling without inductors - targeting portable instrumentation, wearables, and USB peripheral power.
FAQ
What is the minimum input voltage required for LTC3204EDC-3.3#TRMPBF to regulate 3.3 V?
The LTC3204EDC-3.3#TRMPBF requires a minimum input voltage of 1.8 V to maintain regulation at 3.3 V output. Below this, output voltage drops linearly; regulation is guaranteed from 1.9 V input at ≤40 mA and 1.8 V input at ≤50 mA per datasheet Section 6 Electrical Characteristics.
Does LTC3204EDC-3.3#TRMPBF require external compensation components?
No, LTC3204EDC-3.3#TRMPBF uses an internally compensated control loop. Stability is ensured with ≥2.2 µF low-ESR ceramic output capacitance (ESR < 0.1 Ω); no external resistors or capacitors are needed for loop compensation.
Can LTC3204EDC-3.3#TRMPBF drive more than 50 mA continuously?
No - the LTC3204EDC-3.3#TRMPBF is rated for up to 50 mA continuous output. Attempting higher loads causes output voltage droop and triggers thermal shutdown above ~300 mA short-circuit current limit. For >50 mA, consider LTC3200-3.3#TRMPBF or LTC3202.
Is the exposed pad on the LTC3204EDC-3.3#TRMPBF package electrically connected?
Yes - the exposed pad (Pin 7) is internally connected to GND and must be soldered to a PCB ground plane. This connection is mandatory for thermal dissipation (θJA = 80°C/W) and optimal noise performance; omitting it risks thermal shutdown and increased output ripple.
What capacitor types are approved for the flying capacitor (CFLY) in LTC3204EDC-3.3#TRMPBF?
Only non-polarized ceramic capacitors are approved for CFLY in LTC3204EDC-3.3#TRMPBF. Tantalum, aluminum, or polymer capacitors are strictly prohibited due to risk of reverse-voltage damage during charge-pump phase switching. X5R/X7R 2.2 µF 0603 ceramics are recommended.
LTC3204EDC-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)
LTC3204EDC-3.3#TRMPBF FAQ
1.How can I place an order for LTC3204EDC-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3204EDC-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 LTC3204EDC-3.3#TRMPBF reliable?
The price and inventory of LTC3204EDC-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 LTC3204EDC-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3204EDC-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3204EDC-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3204EDC-3.3#TRMPBF?
LTC3204EDC-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3204EDC-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 LTC3204EDC-3.3#TRMPBF?
For technical support, including LTC3204EDC-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3204EDC-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC3204EDC-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3204EDC-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 LTC3204EDC-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3204EDC-3.3#TRMPBF?
All LTC3204EDC-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3204EDC-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 LTC3204EDC-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3204EDC-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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