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Analog Devices Inc. LTC3203BEDD-1#PBF
- Part No.:
- LTC3203BEDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3203BEDD-1#PBF.pdf
- Description:
- IC REG CHG PUMP PROG 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:401
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Product details
Overview
LTC3203BEDD-1#PBF from Analog Devices (formerly Linear Technology) is a low-noise, constant-frequency charge pump DC/DC converter optimized for LED backlight and camera flash power in portable devices. It delivers up to 500mA output current from 2.7V–5.5V input, supports user-selectable 4.5V or 5V fixed output via VSEL pin, and operates in 1.5× or 2× boost mode with 0.9MHz/1MHz switching frequency.
For engineers reviewing the LTC3203BEDD-1#PBF datasheet, LTC3203BEDD-1#PBF pinout, LTC3203BEDD-1#PBF application, or LTC3203BEDD-1#PBF equivalent, key selection criteria include fixed-output voltage selection logic, open-loop output resistance (1.5–3.0Ω), shutdown current (<1µA), thermal protection behavior, and compatibility with ceramic flying capacitors (2.2µF each).
Technical Context
The LTC3203BEDD-1#PBF implements a switched-capacitor architecture with non-overlapping two-phase clocking to achieve regulated boost conversion without inductors. Its internal 0.91V reference compares against FB (not present on -1 variants) or uses factory-trimmed resistive dividers for fixed outputs.
This variant (B-grade, -1 suffix) operates exclusively in constant-frequency mode-no Burst Mode-delivering lowest output noise at full load. Mode selection (1.5× vs 2×) is controlled by the MODE pin voltage threshold (0.788–0.946V), enabling dynamic efficiency optimization based on input voltage and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Options | User-selectable 4.5V (VSEL = 0V) or 5V (VSEL = VIN); ±4% tolerance over temperature and load |
| IOUT Max | 500mA continuous output current; limited by open-loop output resistance (ROL = 1.5–3.0Ω) |
| VIN Range | 2.7V to 5.5V input; supports single-cell Li-ion, USB, or 3.3V system rails |
| fOSC | 0.9MHz (1.5× mode) or 1MHz (2× mode); enables use of small 2.2µF ceramic flying capacitors |
| Shutdown Current | <1µA with SHDN low; disconnects VOUT from VIN for true load isolation |
| Thermal Protection | Auto-shutdown at ~150°C junction; resumes operation at ~135°C; no latch-up under sustained short-circuit |
| Operating Temp | –40°C to +85°C ambient; specified performance guaranteed across full range |
Pinout & Package
Package: 10-pin (3mm × 3mm) DFN with exposed thermal pad (Pin 11, GND). Low-profile design supports space-constrained mobile PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C2+ (Pin 1) | Flying capacitor C2 positive terminal | Connects to + terminal of second 2.2µF ceramic flying cap; polarity reversal during operation prohibits polarized caps |
| VOUT (Pin 2) | Regulated output voltage node | Requires ≥4.7µF low-ESR ceramic bypass; output impedance <0.27Ω in closed loop |
| C1+ (Pin 3) | Flying capacitor C1 positive terminal | Connects to + terminal of first 2.2µF ceramic flying cap; must be non-polarized |
| SHDN (Pin 4) | Active-low shutdown control | Pulling low disables charge pump and disconnects VOUT from VIN; high-impedance CMOS input |
| VSEL (Pin 5) | Output voltage select input | Logic 0 → 4.5V output; logic 1 → 5V output; must not float; compatible with 1.3V/0.4V thresholds |
| MODE (Pin 6) | Conversion ratio selection | Voltage >0.91V → 1.5× mode (higher efficiency); <0.82V → 2× mode (higher current capability) |
| VIN (Pin 7) | Main input supply | Bypass with ≥2.2µF ceramic cap to GND; supports 2.7–5.5V; absolute max 6V |
| C2– (Pin 8) | Flying capacitor C2 negative terminal | Connects to – terminal of second flying cap; shares ground path with C1– and GND pins |
| GND (Pin 9) | Power and signal ground | Low-impedance connection to PCB ground plane; ties to exposed pad (Pin 11) |
| C1– (Pin 10) | Flying capacitor C1 negative terminal | Connects to – terminal of first flying cap; forms return path for charge transfer cycles |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency operation | Eliminates audible noise and EMI spikes associated with Burst Mode; ideal for noise-sensitive imaging and RF sections |
| Fixed dual-output selection | VSEL pin enables hardware-selectable 4.5V (LED bias) or 5V (logic rail) without external feedback components |
| Programmable 1.5×/2× boost mode | MODE pin allows dynamic selection between higher-efficiency (1.5×) and higher-current (2×) operation based on VIN and load |
| Integrated thermal & short-circuit protection | Self-limiting 1A short-circuit current and automatic thermal cycling prevent damage during fault conditions |
| Soft-start circuitry | Linear 250µs output ramp prevents inrush current into large output capacitors and avoids system brownouts |
Applications
| High-Current LED Backlight Supply | Cellphone Camera Flash Supply |
|---|---|
Use Scenario: Powering white LED arrays in smartphone LCD backlights requiring stable 4.5V at up to 500mA. IC Role / Device Role / Timing Role: Constant-current-capable charge pump delivering regulated 4.5V output with <0.37mV/mA load regulation. Use Value: Eliminates inductor cost/size while maintaining low ripple (<20mVpp) and high efficiency (>85% at 3.6V→4.5V/300mA). | Use Scenario: Driving high-brightness camera flash LEDs in mobile handsets with fast turn-on and precise voltage control. IC Role / Device Role / Timing Role: Fast-response boost converter with soft-start and thermal foldback to protect LEDs during burst illumination. Use Value: Enables 5V flash rail from 3.7V Li-ion battery with <1µA shutdown current extending standby time. |
| USB OTG Power Supply | Li-ion to 5V Logic Rail Converter |
Use Scenario: Providing regulated 5V VBUS power from a 3.3V or single-cell Li-ion source in USB On-The-Go accessories. IC Role / Device Role / Timing Role: Fixed 5V output charge pump supporting up to 500mA with automatic load-dependent mode switching. Use Value: Meets USB 2.0 VBUS specification (4.75–5.25V) across full input range (2.7–5.5V) without external LDO post-regulation. | Use Scenario: Generating clean 5V logic supply for microcontrollers, sensors, or interface ICs from a 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Low-noise, constant-frequency DC/DC converter with integrated shutdown and thermal safety. Use Value: Replaces inefficient linear regulators with >90% efficiency at mid-load, reducing thermal stress in compact enclosures. |
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 |
|---|---|---|---|
| TPS60403DBVR | Fixed 5V output only; 280mA max output; 1.2MHz switching; no VSEL or MODE pin | Limited to lower-current 5V-only systems; lacks dual-voltage and mode flexibility | Select when only 5V/280mA is required and board space is extremely constrained |
| MAX889TEUK+T | Adjustable output via FB pin; 200mA max; 1MHz fixed frequency; no VSEL or MODE control | Suitable for precision-adjustable low-current rails but cannot match 500mA or dual-voltage capability | Choose for designs needing programmable output below 200mA where external feedback is acceptable |
Compared with TPS60403DBVR and MAX889TEUK+T, the LTC3203BEDD-1#PBF uniquely combines 500mA output, hardware-selectable 4.5V/5V, and dual-mode (1.5×/2×) operation in a 3mm × 3mm DFN-enabling higher-power LED and USB OTG applications without inductors or complex compensation.
Availability
LTC3203BEDD-1#PBF is available at Aetrix Electronics and suitable for high-reliability portable electronics, LED lighting modules, and USB OTG accessory designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3203BEDD-1#PBF 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 semiconductors.
The LTC3203 family was designed specifically for inductorless, low-noise power conversion in space- and noise-constrained portable electronics-emphasizing efficiency, simplicity, and robust protection.
FAQ
What output voltages does the LTC3203BEDD-1#PBF support, and how are they selected?
The LTC3203BEDD-1#PBF supports two fixed output voltages: 4.5V and 5V. Selection is made using the VSEL pin-logic low (≤0.4V) configures 4.5V output; logic high (≥1.3V) configures 5V output. This hardware-based selection eliminates external feedback components and ensures ±4% regulation across temperature and load for both settings.
Does the LTC3203BEDD-1#PBF support Burst Mode operation?
No, the LTC3203BEDD-1#PBF does not support Burst Mode operation. As a "B"-grade variant with "-1" suffix, it operates exclusively in constant-frequency mode (0.9MHz or 1MHz) to minimize output noise and EMI-making it ideal for imaging, audio, and RF-sensitive applications where switching noise must be strictly controlled.
What is the maximum continuous output current of the LTC3203BEDD-1#PBF, and what limits it?
The LTC3203BEDD-1#PBF delivers up to 500mA continuous output current. This limit is determined by the effective open-loop output resistance (ROL), which ranges from 1.5Ω (1.5× mode) to 3.0Ω (2× mode), and thermal constraints. At 500mA, voltage drop across ROL and internal losses must remain within safe junction temperature limits (125°C max TJ, 150°C thermal shutdown).
Can the LTC3203BEDD-1#PBF be used with tantalum or electrolytic capacitors for flying capacitors?
No-tantalum or aluminum electrolytic capacitors must never be used for flying capacitors (C1, C2) in the LTC3203BEDD-1#PBF. During startup and switching, these capacitors experience reverse voltage stress that can cause catastrophic failure. Only low-ESR, non-polarized ceramic capacitors (minimum 2.2µF each, X5R/X7R dielectric) are permitted and validated for reliable operation.
How does the MODE pin affect operation of the LTC3203BEDD-1#PBF?
The MODE pin selects between 1.5× (higher efficiency) and 2× (higher current) boost conversion. When MODE voltage exceeds 0.91V, the LTC3203BEDD-1#PBF enters 1.5× mode (0.9MHz); below 0.82V, it enters 2× mode (1MHz). Hysteresis prevents oscillation, and resistor dividers on MODE allow precise VIN-based mode transition thresholds-critical for optimizing efficiency across battery discharge profiles.
LTC3203BEDD-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 4.5V, 5V
- Voltage - Output (Max):
- -
- 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)
LTC3203BEDD-1#PBF FAQ
1.How can I place an order for LTC3203BEDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3203BEDD-1#PBF 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 LTC3203BEDD-1#PBF reliable?
The price and inventory of LTC3203BEDD-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3203BEDD-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3203BEDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3203BEDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3203BEDD-1#PBF?
LTC3203BEDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3203BEDD-1#PBF 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 LTC3203BEDD-1#PBF?
For technical support, including LTC3203BEDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3203BEDD-1#PBF requirements.
6.How does Aetrix verify that LTC3203BEDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3203BEDD-1#PBF 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 LTC3203BEDD-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3203BEDD-1#PBF?
All LTC3203BEDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3203BEDD-1#PBF, 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 LTC3203BEDD-1#PBF part is unused and in its original packaging.
Return procedure for LTC3203BEDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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