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Analog Devices Inc. LTC3203BEDD-1#TRPBF
- Part No.:
- LTC3203BEDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3203BEDD-1#TRPBF.pdf
- Description:
- IC REG CHG PUMP PROG 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
LTC3203BEDD-1#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, constant-frequency charge pump DC/DC converter delivering up to 500mA output current from 2.7V–5.5V input. It operates in selectable 1.5× or 2× boost modes, features user-selectable 4.5V/5V fixed output via VSEL pin, and integrates short-circuit and thermal protection. It powers LED backlighting in compact mobile devices.
For engineers reviewing the LTC3203BEDD-1#TRPBF datasheet, LTC3203BEDD-1#TRPBF pinout, LTC3203BEDD-1#TRPBF application, or LTC3203BEDD-1#TRPBF equivalent, key selection criteria include fixed-output voltage selection logic, constant-frequency noise performance, open-loop output resistance (ROL), shutdown current (<1µA), and DFN-10 (3mm × 3mm) thermal design constraints.
Technical Context
The LTC3203BEDD-1#TRPBF uses a two-phase non-overlapping switched-capacitor architecture with internal 1.5×/2× mode control determined by the MODE pin voltage threshold (VMODEH = 0.91V typ, VMODEL = 0.82V typ). Unlike Burst Mode variants, it maintains fixed 0.9MHz (1.5×) or 1.0MHz (2×) switching frequency across all load conditions for lowest output ripple and EMI.
It implements regulated output via internal 0.91V reference and VSEL-controlled fixed divider (no external FB network). Output voltage is set to 4.5V (VSEL = LOW) or 5V (VSEL = HIGH), with ±4% tolerance over temperature and load. Soft-start limits inrush current over ~250µs, and shutdown disconnects VOUT from VIN while drawing <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 LDO pre-regulation. |
| VOUT Options | 4.5V or 5V (user-selectable via VSEL) - matches white LED forward voltage or 5V logic interface requirements. |
| IOUT Max | 500mA - sufficient for driving 4–6 parallel white LEDs at 20mA each in backlight applications. |
| fOSC | 0.9MHz (1.5× mode) / 1.0MHz (2× mode) - enables use of small 2.2µF ceramic flying capacitors and reduces EMI filtering burden. |
| Shutdown Current | <1µA - preserves battery life during system sleep states in portable electronics. |
| Open-Loop ROL | 1.5Ω (1.5×, VIN=3.6V, VOUT=4.5V) / 2.0Ω (2×, VIN=2.7V, VOUT=4.5V) - determines maximum deliverable current before regulation loss. |
| Thermal Protection | Junction shutdown at ~150°C, restart at ~135°C - prevents permanent damage under sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 10-lead (3mm × 3mm) DFN with exposed thermal pad (Pin 11, GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| 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 mandates non-polarized ceramic only. |
| VOUT (Pin 2) | Regulated output voltage | Must be bypassed with ≥4.7µF low-ESR ceramic capacitor; output disconnects from VIN during shutdown. |
| C1+ (Pin 3) | Flying capacitor C1 positive terminal | Connects to + side of first 2.2µF ceramic flying cap; shares same polarity constraint as C2+. |
| SHDN (Pin 4) | Active-low shutdown control | Pulling LOW disables charge pump and disconnects VOUT; must not float - tie to GND or controlled logic. |
| VSEL (Pin 5) | Output voltage select input | LOW = 4.5V output; HIGH = 5V output; CMOS-compatible with 0.4V/1.3V thresholds; must not float. |
| MODE (Pin 6) | Conversion ratio selection | Controls 1.5× (HIGH) vs 2× (LOW) mode; hysteresis prevents chatter; resistor divider from VIN sets transition threshold. |
| VIN (Pin 7) | Input supply voltage | Requires ≥2.2µF low-ESR ceramic bypass to GND; accepts 2.7–5.5V unregulated sources. |
| 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) | Signal and power ground | Primary ground reference; connects to PCB ground plane; ties to exposed pad (Pin 11). |
| C1– (Pin 10) | Flying capacitor C1 negative terminal | Connects to – side of first flying cap; completes dual-capacitor charge pump topology. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency operation | Eliminates variable-frequency noise peaks; simplifies EMI filtering and meets strict RF coexistence requirements in smartphones. |
| User-selectable 4.5V/5V output | Enables single BOM for dual-voltage systems - e.g., 4.5V for LED bias, 5V for USB OTG host power - without external resistors. |
| Integrated soft-start | Linearly ramps output current over ~250µs, preventing inrush-induced brownout on shared battery rails. |
| Thermal and short-circuit protection | Auto-recovers from faults without latch-up; supports robust field operation in unattended portable devices. |
| DFN-10 (3mm × 3mm) package | Minimizes PCB area and thermal resistance (θJA = 44°C/W); exposed pad requires direct solder connection to ground plane. |
Applications
| High-Current LED Backlight Supply | Cellphone Camera Flash Supply |
|---|---|
Use Scenario: Driving 4–6 parallel white LEDs in smartphone LCD backlight modules with tight space constraints. IC Role / Device Role / Timing Role: Fixed-output charge pump providing regulated 4.5V at up to 500mA with minimal external components. Use Value: Replaces inductor-based boost converters, eliminating magnetic EMI and reducing solution size by >40%. | Use Scenario: Powering high-intensity camera flash LEDs requiring brief 500mA pulses at 5V in mobile handsets. IC Role / Device Role / Timing Role: Delivers stable 5V output (VSEL = HIGH) with fast transient response and low output ripple. Use Value: Enables consistent flash brightness across battery voltage range (2.7–4.2V) without efficiency collapse at low VIN. |
| USB On-The-Go (OTG) Host Power | Li-ion to 5V Logic Rail Conversion |
Use Scenario: Providing 5V/500mA VBUS power from a single-cell Li-ion battery in OTG-enabled accessories. IC Role / Device Role / Timing Role: Acts as compact, low-noise 2× charge pump with automatic mode selection (2× at low VIN, 1.5× above 3.1V). Use Value: Meets USB-IF VBUS tolerance (4.75–5.25V) across full battery discharge curve without external feedback tuning. | Use Scenario: Generating clean 5V rail for microcontrollers, sensors, or USB peripherals from 3.3V or Li-ion sources. IC Role / Device Role / Timing Role: Provides regulated 5V output with <1µA shutdown current and no inductor-related losses. Use Value: Extends battery runtime in always-on IoT nodes by minimizing quiescent power in sleep mode. |
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 |
|---|---|---|---|
| LTC3203EDD-1#TRPBF | Same pinout and function but rated for 0°C to 85°C (vs –40°C to 85°C for LTC3203BEDD-1#TRPBF); lower guaranteed ROL at cold temp. | Suitable for commercial-grade consumer devices; not qualified for industrial or automotive ambient ranges. | Select when cost sensitivity outweighs extended temperature requirement and thermal derating is acceptable. |
| MAX8647ETE+T | Fixed 5V output only; 400mA max IOUT; 1.2MHz fOSC; different pinout (16-pin TQFN); no VSEL or MODE pins. | Lacks dual-voltage flexibility and 1.5× mode; higher switching frequency increases capacitor stress but reduces size. | Choose for simpler 5V-only designs where 100mA lower current headroom is acceptable and layout allows new footprint. |
Compared with LTC3203EDD-1#TRPBF, the LTC3203BEDD-1#TRPBF offers wider operating temperature range and tighter ROL specs at low temperature; versus MAX8647ETE+T, it provides dual-output voltage selection and higher output current, but requires more careful MODE pin configuration for optimal efficiency.
Availability
LTC3203BEDD-1#TRPBF is available at Aetrix Electronics and suitable for high-reliability LED backlighting, USB OTG host power, and Li-ion-to-5V logic rail conversion requiring stable component supply across industrial temperature ranges.
Supply support for LTC3203BEDD-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 and maintains its precision analog and power management portfolio. Linear's legacy charge pump ICs are widely adopted for low-EMI, inductor-free DC/DC conversion.
The LTC3203B family was designed specifically for space-constrained, battery-powered applications demanding low noise, fixed-frequency operation, and robust thermal behavior - especially in mobile imaging and display subsystems.
FAQ
What output voltages does the LTC3203BEDD-1#TRPBF support, and how is selection implemented?
The LTC3203BEDD-1#TRPBF supports two fixed output voltages: 4.5V and 5V. Selection is made using the VSEL pin (Pin 5): a logic LOW (≤0.4V) configures 4.5V output, and a logic HIGH (≥1.3V) configures 5V output. The LTC3203BEDD-1#TRPBF does not require external resistors or feedback networks - the voltage dividers are internal. VSEL must never be left floating and should be driven directly from a GPIO or pull-up/down network.
How does the MODE pin affect efficiency and output current in the LTC3203BEDD-1#TRPBF?
The MODE pin (Pin 6) selects between 1.5× and 2× charge pump operation. At MODE HIGH (>0.91V), the LTC3203BEDD-1#TRPBF operates in 1.5× mode (0.9MHz), yielding higher efficiency but lower available output current due to higher effective ROL. At MODE LOW (<0.82V), it operates in 2× mode (1.0MHz), delivering higher output current (up to 500mA) at the expense of efficiency - ideal for low-VIN conditions like depleted Li-ion batteries. The LTC3203BEDD-1#TRPBF includes hysteresis to prevent mode oscillation.
What are the critical capacitor requirements for stable operation of the LTC3203BEDD-1#TRPBF?
The LTC3203BEDD-1#TRPBF requires three types of ceramic capacitors: two 2.2µF non-polarized X5R/X7R flying capacitors (C1, C2), a ≥2.2µF low-ESR ceramic input capacitor (CIN), and a ≥4.7µF low-ESR ceramic output capacitor (COUT). Polarized capacitors (tantalum, aluminum) are strictly prohibited for flying caps due to voltage reversal risk. COUT must maintain ≥4.7µF under DC bias - verify manufacturer's voltage derating curves. Exposed pad soldering is mandatory for thermal stability.
Does the LTC3203BEDD-1#TRPBF include protection features, and how do they behave?
Yes, the LTC3203BEDD-1#TRPBF integrates short-circuit current limiting (~1A typical) and thermal shutdown (~150°C trip, ~135°C recovery). During short-circuit, output current is clamped and the device cycles in/out of thermal shutdown until fault removal - no latch-up occurs. Shutdown mode (SHDN = LOW) disconnects VOUT from VIN and reduces supply current to <1µA after VOUT discharges. These protections operate autonomously without external circuitry.
Can the LTC3203BEDD-1#TRPBF be used in place of the LTC3203B-1 or LTC3203-1, and what are the key distinctions?
The LTC3203BEDD-1#TRPBF is the industrial-grade variant (–40°C to 85°C) of the LTC3203-1/LTC3203B-1 family. It shares identical pinout, functionality, and electrical specs with LTC3203EDD-1#TRPBF except for guaranteed performance across the extended temperature range and tighter ROL specifications at low temperature. It is not a drop-in replacement for non-B versions (e.g., LTC3203EDD) in industrial environments, but pin- and function-compatible with all -1 suffix variants.
LTC3203BEDD-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)
LTC3203BEDD-1#TRPBF FAQ
1.How can I place an order for LTC3203BEDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3203BEDD-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 LTC3203BEDD-1#TRPBF reliable?
The price and inventory of LTC3203BEDD-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 LTC3203BEDD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3203BEDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3203BEDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3203BEDD-1#TRPBF?
LTC3203BEDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3203BEDD-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 LTC3203BEDD-1#TRPBF?
For technical support, including LTC3203BEDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3203BEDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3203BEDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3203BEDD-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 LTC3203BEDD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3203BEDD-1#TRPBF?
All LTC3203BEDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3203BEDD-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 LTC3203BEDD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3203BEDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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