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Analog Devices Inc. LTC3203EDD-1#TRPBF
- Part No.:
- LTC3203EDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3203EDD-1#TRPBF.pdf
- Description:
- IC REG CHG PUMP PROG 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,449
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Product details
Overview
LTC3203EDD-1#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-output, low-noise charge pump DC/DC converter delivering up to 500mA at 4.5V or 5V from 2.7V–5.5V input. It operates in selectable 1.5× or 2× boost mode, features Burst Mode® for light-load efficiency (~120µA IQ), and integrates soft-start, short-circuit, and thermal protection. It powers LED backlighting and USB OTG power rails in compact portable devices.
For engineers reviewing the LTC3203EDD-1#TRPBF datasheet, LTC3203EDD-1#TRPBF pinout, LTC3203EDD-1#TRPBF application, or LTC3203EDD-1#TRPBF equivalent, key selection criteria include output voltage selectability (4.5V/5V via VSEL), dual-mode conversion efficiency trade-offs, shutdown current (<1µA), DFN-10 package thermal performance, and compatibility with ceramic flying capacitors.
Technical Context
The LTC3203EDD-1#TRPBF uses a two-phase non-overlapping switched-capacitor architecture with internal 1.5×/2× charge pump control. Its MODE pin selects between 0.9MHz (1.5×) and 1MHz (2×) oscillator frequency, directly determining output current capability and ripple profile.
VSEL pin enables user-selectable 4.5V or 5V regulation without external feedback resistors. Internal 0.91V reference and comparator maintain regulation; soft-start limits inrush by linearly ramping output current over ~250µs. Built-in thermal shutdown activates at ~150°C and recovers at ~135°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | User-selectable 4.5V (VSEL = 0V) or 5V (VSEL = VIN); ±4% tolerance over load/temperature |
| Max Output Current | 500mA at 4.5V (VIN ≥ 2.7V); derates per ROL and VIN-e.g., 300mA at 2.7V input in 2× mode |
| Input Voltage Range | 2.7V to 5.5V; supports single-cell Li-ion, Li-poly, and 3.3V system rails |
| No-Load Quiescent Current | ~120µA in Burst Mode® (LTC3203-1 variant); enables >100-hour battery life in standby |
| Shutdown Current | <1µA with SHDN low; disconnects VOUT from VIN for true load isolation |
| Oscillator Frequency | 1.0MHz in 2× mode, 0.9MHz in 1.5× mode; enables use of small 2.2µF ceramic flying capacitors |
| Operating Temperature | –40°C to +85°C ambient; junction limited to 125°C max with θJA = 44°C/W |
Pinout & Package
Package: 10-lead (3mm × 3mm) DFN with exposed thermal pad (Pin 11), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C2+ (Pin 1) | Flying capacitor C2 positive terminal | Connects to positive plate of second 2.2µF ceramic flying cap; voltage reverses during switching cycle |
| VOUT (Pin 2) | Regulated output voltage node | Must be bypassed with ≥4.7µF low-ESR ceramic capacitor; supplies LED strings or logic loads |
| C1+ (Pin 3) | Flying capacitor C1 positive terminal | Connects to positive plate of first 2.2µF ceramic flying cap; phase-opposed to C2+ |
| SHDN (Pin 4) | Active-low shutdown control | Pulling low disables charge pump and disconnects VOUT from VIN; must not float |
| VSEL (Pin 5) | Output voltage selection input | Logic 0 → 4.5V output; logic 1 → 5V output; internal pull-down ensures default 4.5V on power-up |
| MODE (Pin 6) | Conversion ratio selection | VMODEH > 0.91V → 1.5× mode (higher efficiency); VMODEL < 0.82V → 2× mode (higher current) |
| VIN (Pin 7) | Main input supply connection | Requires ≥2.2µF low-ESR ceramic bypass; accepts 2.7–5.5V battery or rail inputs |
| C2– (Pin 8) | Flying capacitor C2 negative terminal | Connects to negative plate of C2; tied to GND during one phase, floats during other |
| GND (Pin 9) | Power and signal ground reference | Low-impedance connection to PCB ground plane; shares thermal pad (Pin 11) |
| C1– (Pin 10) | Flying capacitor C1 negative terminal | Connects to negative plate of C1; complementary switching to C2– |
Key Features
| Feature | Design Value |
|---|---|
| Selectable 4.5V/5V fixed output | Eliminates external feedback resistors; simplifies layout and reduces BOM count for LED or logic supply |
| Burst Mode® operation | Reduces no-load IQ to ~120µA while maintaining regulation-critical for battery runtime in idle states |
| Dual-mode charge pump (1.5×/2×) | Enables optimization: 1.5× for higher efficiency at mid-VIN; 2× for higher current at low-VIN (e.g., 2.7V) |
| Integrated soft-start | Linearly ramps output current over ~250µs to prevent inrush into large output caps or LED strings |
| Thermal and short-circuit protection | Auto-recovers from overtemperature (>150°C) and short events (~1A current limit); no latch-up |
Applications
| Cellphone LED Backlight | USB OTG Power Supply |
|---|---|
|
Use Scenario: Driving parallel white LEDs in smartphone displays requiring stable 4.5V bias. IC Role / Device Role / Timing Role: Fixed-voltage charge pump regulator providing regulated current source via external sense resistor. Use Value: Delivers 500mA at 4.5V with <27mV load transient deviation (0.27Ω closed-loop resistance), minimizing LED brightness flicker. |
Use Scenario: Generating 5V VBUS from 3.3V system rail in USB On-The-Go host mode. IC Role / Device Role / Timing Role: Step-up DC/DC converter enabling host negotiation without external 5V source. Use Value: Supports full 500mA USB load with <1µA shutdown current, preserving host battery during peripheral disconnect. |
| Portable Camera Flash | Li-ion to 5V Logic Rail |
|
Use Scenario: Powering high-brightness camera flash LEDs in PDAs and compact cameras. IC Role / Device Role / Timing Role: High-current, low-noise boost converter with fast transient response for pulsed LED drive. Use Value: 2× mode delivers peak 500mA at 5V with minimal output ripple (<10mVpp), ensuring consistent flash intensity. |
Use Scenario: Converting single-cell Li-ion (2.7–4.2V) to stable 5V for microcontroller or interface ICs. IC Role / Device Role / Timing Role: Efficient, compact voltage booster replacing inductor-based solutions in space-constrained designs. Use Value: Achieves >85% efficiency across 2.7–4.2V input range using only ceramic capacitors-no EMI-sensitive inductors. |
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+T | Fixed 5V output only; no VSEL pin; 400mA max output; 1.2MHz switching | Lacks 4.5V option and lower current headroom-unsuitable for 500mA LED backlighting | Choose when 5V-only, lower-cost, and <400mA load suffice; requires different layout due to TDFN-16 package |
| TPS60403DBVR | Fixed 5V output; 60mA max; 500kHz switching; no Burst Mode®; higher IQ (~250µA) | Insufficient current for backlight or USB OTG; targets low-power logic rails only | Select only for ultra-low-power 5V bias where 60mA is adequate; incompatible for high-current roles of LTC3203EDD-1#TRPBF |
Compared with MAX8647ETE+T and TPS60403DBVR, the LTC3203EDD-1#TRPBF uniquely supports dual 4.5V/5V outputs at 500mA with Burst Mode® efficiency, making it the sole fit for high-current portable LED and USB OTG applications requiring flexible voltage selection and minimal quiescent draw.
Availability
LTC3203EDD-1#TRPBF is available at Aetrix Electronics and suitable for cellphone LED backlighting, USB OTG power delivery, portable camera flash, and Li-ion-to-5V logic rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3203EDD-1#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 semiconductors.
The LTC3203 family was designed specifically for compact, low-noise, high-efficiency charge pump power conversion in battery-powered portable electronics-emphasizing minimal external components, selectable output voltages, and robust protection.
FAQ
What output voltages does the LTC3203EDD-1#TRPBF support?
The LTC3203EDD-1#TRPBF supports two fixed output voltages: 4.5V when VSEL is logic low (≤0.4V), and 5V when VSEL is logic high (≥1.3V). These are factory-trimmed and do not require external resistors. The 4.5V setting is optimized for white LED forward voltage compliance, while 5V meets USB OTG and logic interface requirements. Both outputs maintain ±4% regulation across temperature and load.
How does the MODE pin affect LTC3203EDD-1#TRPBF operation?
The MODE pin on the LTC3203EDD-1#TRPBF selects between 1.5× (0.9MHz) and 2× (1.0MHz) charge pump operation. A voltage >0.91V enables 1.5× mode for higher efficiency at mid-to-high VIN; <0.82V enables 2× mode for greater output current at low VIN (e.g., 2.7V). Hysteresis prevents oscillation between modes during VIN transitions, and the pin must not float-it requires a defined voltage or resistor divider.
What is the minimum required output capacitance for stable LTC3203EDD-1#TRPBF operation?
The LTC3203EDD-1#TRPBF requires ≥4.7µF of effective capacitance at VOUT under all operating conditions-including DC bias and temperature extremes-to ensure loop stability and prevent ringing. Ceramic capacitors are mandatory; X5R or X7R dielectrics are recommended over Y5V/Z5U due to superior voltage coefficient and temperature stability. At 5V bias, a 10µF, 6.3V X5R 0805 capacitor typically maintains >5µF net capacitance.
Does the LTC3203EDD-1#TRPBF support true load disconnect during shutdown?
Yes-the LTC3203EDD-1#TRPBF provides true load disconnect: when SHDN is pulled low, internal switches isolate VOUT from VIN, preventing backfeed and leakage into the output rail. Shutdown current drops below 1µA once VOUT discharges fully. This feature is essential for battery-powered systems requiring zero standby drain and safe hot-swap capability.
Can the LTC3203EDD-1#TRPBF drive LEDs directly, or is an external current sense required?
The LTC3203EDD-1#TRPBF regulates output voltage-not current-so driving LEDs requires an external current-setting method. For constant-current LED bias, place a sense resistor (RX) between LED cathode and GND; LED current equals VFB/RX ≈ 0.91V/RX. This configuration leverages the LTC3203EDD-1#TRPBF's low closed-loop output resistance (0.27Ω) for tight current regulation across load transients.
LTC3203EDD-1#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:
- 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)
LTC3203EDD-1#TRPBF FAQ
1.How can I place an order for LTC3203EDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3203EDD-1#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-1#TRPBF reliable?
The price and inventory of LTC3203EDD-1#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-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3203EDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3203EDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3203EDD-1#TRPBF?
LTC3203EDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3203EDD-1#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-1#TRPBF?
For technical support, including LTC3203EDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3203EDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3203EDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3203EDD-1#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-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3203EDD-1#TRPBF?
All LTC3203EDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3203EDD-1#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-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3203EDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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