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Analog Devices Inc. LTC3203EDD#TRPBF
- Part No.:
- LTC3203EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3203EDD#TRPBF.pdf
- Description:
- IC REG CHRG PUMP ADJ 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,268
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Product details
Overview
LTC3203EDD#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, high-efficiency 1.5x/2x fractional charge pump DC/DC converter delivering up to 500mA output current from 2.7V–5.5V input. It features user-selectable fixed 4.5V or 5V output via VSEL pin, Burst Mode operation (IQ ≈ 120µA), and integrated short-circuit/thermal protection. It powers LED backlighting in compact battery-powered devices such as smartphones and PDAs.
For engineers reviewing the LTC3203EDD#TRPBF datasheet, LTC3203EDD#TRPBF pinout, LTC3203EDD#TRPBF application, or LTC3203EDD#TRPBF equivalent, key selection criteria include output voltage programmability (4.5V/5V), dual-mode efficiency trade-offs (Burst vs constant-frequency), thermal derating at 500mA, DFN-10 package layout constraints, and flying capacitor selection for ripple control.
Technical Context
The LTC3203EDD#TRPBF implements a two-phase non-overlapping switched-capacitor architecture with selectable 1.5x (0.9MHz) or 2x (1MHz) voltage conversion. Its MODE pin controls mode switching based on externally set voltage thresholds, enabling adaptive efficiency optimization across input voltage range.
Regulation is achieved via internal 0.91V reference and error amplifier comparing feedback (FB) or fixed VSEL logic state. Soft-start limits inrush current over ~250µs, while shutdown disconnects VOUT from VIN and reduces quiescent current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and 3.3V system rails without external LDO pre-regulation. |
| VOUT Options | 4.5V or 5V (fixed, VSEL-controlled) - matches white LED forward voltage or 5V logic interface requirements. |
| Max Output Current | 500mA - sufficient for driving 4–6 parallel white LEDs at 20mA each in backlight applications. |
| Switching Frequency | 0.9MHz (1.5x) / 1MHz (2x) - enables use of small 2.2µF ceramic flying capacitors and minimizes EMI. |
| Quiescent Current | 120µA (Burst Mode) - extends battery life in standby or low-brightness display modes. |
| Shutdown Current | <1µA - ensures negligible drain during system sleep or power-off states. |
| Thermal Shutdown | 150°C (re-enable at ~135°C) - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 10-pin (3mm × 3mm) DFN with exposed thermal pad (Pin 11 = GND). Requires soldering of exposed pad to PCB ground plane for thermal performance (θJA = 44°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C2+ (Pin 1) | Flying capacitor C2 positive terminal | Connects to + side of second 2.2µF ceramic flying cap; polarity reversal during operation prohibits polarized caps. |
| VOUT (Pin 2) | Regulated output voltage | Must be bypassed with ≥4.7µF low-ESR ceramic cap; output impedance ≤0.27Ω (1.5x mode) affects load transient response. |
| C1+ (Pin 3) | Flying capacitor C1 positive terminal | Connects to + side of first 2.2µF ceramic flying cap; same polarity constraints as C2+. |
| SHDN (Pin 4) | Active-low shutdown control | Pulling low disables charge pump and disconnects VOUT from VIN; must not float (CMOS input, leakage ±1µA). |
| VSEL (Pin 5) | Output voltage select input | Logic 0 → 4.5V output; logic 1 → 5V output; defines fixed regulation point without external resistors. |
| MODE (Pin 6) | Conversion mode selection | VMODEH >0.874V → 1.5x mode (higher efficiency); VMODEL <0.852V → 2x mode (higher current, lower ripple). |
| VIN (Pin 7) | Input supply voltage | Requires ≥2.2µF low-ESR ceramic bypass cap; input current profile is near-constant, reducing supply noise. |
| C2– (Pin 8) | Flying capacitor C2 negative terminal | Connects to – side of second flying cap; forms charge-transfer path with C2+ and internal switches. |
| GND (Pin 9) | Power ground reference | Low-impedance connection to PCB ground plane essential for noise immunity and thermal conduction. |
| C1– (Pin 10) | Flying capacitor C1 negative terminal | Connects to – side of first flying cap; interleaved switching with C2– minimizes input/output ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode charge pump (1.5x/2x) | Enables dynamic efficiency optimization: 1.5x mode improves η at higher VIN; 2x mode sustains output at low VIN. |
| Burst Mode operation | Reduces no-load IQ to ~120µA by disabling oscillator during light loads-critical for battery runtime in display idle states. |
| Fixed 4.5V/5V output selection | VSEL pin eliminates external resistor divider, simplifying BOM and layout for LED backlight or USB OTG 5V supply. |
| Integrated protection | Short-circuit current limit (~1A) and thermal shutdown (150°C) prevent damage under fault conditions without external circuitry. |
| Soft-start circuitry | Linearly ramps output current over ~250µs to avoid inrush into large output capacitors and stabilize input rail. |
Applications
| Smartphone LED Backlight | USB OTG Power Supply |
|---|---|
Use Scenario: Driving 4–6 parallel white LEDs in a smartphone display backlight requiring stable 4.5V at up to 500mA. IC Role / Device Role / Timing Role: Fixed-output charge pump regulator providing regulated boost voltage independent of battery voltage sag. Use Value: Eliminates need for inductor-based boost converters, reducing solution size and EMI while maintaining brightness uniformity across 2.7V–4.2V Li-ion discharge curve. |
Use Scenario: Providing 5V VBUS power from a 3.3V system rail or single-cell battery in USB On-The-Go host mode. IC Role / Device Role / Timing Role: Compact, capacitor-only DC/DC converter meeting USB 2.0 VBUS specification (4.4–5.25V) with fast transient response. Use Value: Enables true dual-role USB connectivity without external inductors or complex PMIC integration, supporting portable accessories. |
| Camera Flash LED Driver | Portable PDA Logic Supply |
Use Scenario: Delivering brief 500mA pulses to white LEDs for camera flash in handheld PDAs or barcode scanners. IC Role / Device Role / Timing Role: High-current charge pump with fast load transient recovery and thermal foldback during burst illumination. Use Value: Supports high-intensity flash without voltage droop or thermal shutdown, leveraging low-ESR ceramic caps for microsecond-level response. |
Use Scenario: Generating clean 5V rail from 3.3V main system supply to power SD card interfaces, USB PHYs, or legacy peripherals in PDAs. IC Role / Device Role / Timing Role: Low-noise, constant-frequency (0.9MHz/1MHz) regulator minimizing interference with sensitive analog or RF sections. Use Value: Replaces inefficient linear regulators with >85% efficiency across load range, extending battery life without adding magnetic components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8647ETE+ | Fixed 5V output only; no VSEL option; 400mA max output; uses different MODE threshold voltages. | Lacks 4.5V LED-optimized setting; lower current capability limits multi-LED configurations. | Select when 5V-only output and lower cost are prioritized over flexibility and peak current headroom. |
| TPS60230RTJR | 1.5x-only operation; 250mA max output; requires external FB resistor divider; no Burst Mode. | Not suitable for 500mA LED loads or battery-sensitive Burst Mode operation; higher no-load IQ (250µA). | Choose for simpler 1.5x-only designs where full 500mA capability and ultra-low IQ are not required. |
Compared with MAX8647ETE+ and TPS60230RTJR, the LTC3203EDD#TRPBF provides unique VSEL-selectable 4.5V/5V outputs, higher 500mA current capability, and Burst Mode IQ of 120µA-making it optimal for space-constrained, battery-powered LED and USB OTG applications demanding both flexibility and efficiency.
Availability
LTC3203EDD#TRPBF is available at Aetrix Electronics and suitable for smartphone backlighting, USB OTG power delivery, and portable camera flash applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for LTC3203EDD#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) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving precision instrumentation, communications, and power-constrained applications.
The LTC3203EDD#TRPBF belongs to Linear's low-noise charge pump family designed specifically for compact, inductorless DC/DC conversion in battery-powered portable electronics where EMI, board area, and efficiency are critical.
FAQ
What output voltage options does the LTC3203EDD#TRPBF support?
The LTC3203EDD#TRPBF supports two fixed output voltages: 4.5V (when VSEL = 0V) and 5V (when VSEL = VIN). These are factory-trimmed and do not require external resistors. The 4.5V setting is optimized for white LED forward voltage, while 5V meets USB OTG and logic interface requirements. No adjustment is possible beyond these two points.
How does Burst Mode operation improve efficiency in the LTC3203EDD#TRPBF?
Burst Mode operation in the LTC3203EDD#TRPBF reduces no-load quiescent current to approximately 120µA by disabling the internal oscillator and entering a low-power sleep state when load current falls below a VIN-dependent threshold. This significantly extends battery life in display idle or low-brightness modes, while automatic wake-up maintains regulation during load transients.
Can the LTC3203EDD#TRPBF drive 500mA continuously without thermal issues?
The LTC3203EDD#TRPBF can deliver 500mA continuously only with proper thermal design: the exposed pad (Pin 11) must be soldered to a minimum 100mm² copper pour on the PCB, and ambient temperature must remain ≤60°C. At 5.5V input and 5V output, power dissipation exceeds 500mW-exceeding safe junction temperature without adequate heatsinking.
What are the critical layout requirements for the LTC3203EDD#TRPBF flying capacitors?
The LTC3203EDD#TRPBF requires two 2.2µF low-ESR X5R/X7R ceramic flying capacitors (C1, C2) placed symmetrically adjacent to Pins 1–3 and 8–10. Polarized capacitors (tantalum, aluminum) are strictly prohibited due to voltage reversal during startup. Trace lengths must be minimized (<2mm), and ground vias must connect directly to the exposed pad to maintain low-inductance return paths.
Does the LTC3203EDD#TRPBF support automatic mode switching between 1.5x and 2x operation?
Yes-the LTC3203EDD#TRPBF supports automatic mode switching via the MODE pin. By connecting a resistor divider from VIN to GND, the MODE voltage crosses VMODEH (0.874–0.946V) to enter 1.5x mode or VMODEL (0.788–0.852V) to enter 2x mode. Hysteresis prevents oscillation, enabling seamless adaptation to input voltage changes without external control logic.
LTC3203EDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.91V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 500mA
- Frequency - Switching:
- 900kHz, 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3203EDD#TRPBF FAQ
1.How can I place an order for LTC3203EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3203EDD#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 LTC3203EDD#TRPBF reliable?
The price and inventory of LTC3203EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3203EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3203EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3203EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3203EDD#TRPBF?
LTC3203EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3203EDD#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 LTC3203EDD#TRPBF?
For technical support, including LTC3203EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3203EDD#TRPBF requirements.
6.How does Aetrix verify that LTC3203EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3203EDD#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 LTC3203EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3203EDD#TRPBF?
All LTC3203EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3203EDD#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 LTC3203EDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3203EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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