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Analog Devices Inc. LTC3210EUD-2#TRPBF
- Part No.:
- LTC3210EUD-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3210EUD-2#TRPBF.pdf
- Description:
- IC LED DRV RGLTR /400MA 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
LTC3210EUD-2#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, multimode charge pump DC/DC converter IC designed to drive three or four MAIN LEDs and one high-current CAM LED in mobile camera lighting systems. It delivers up to 20mA per MAIN output (4-channel), 380mA on CAM output, operates from 2.9V–4.5V input, features automatic 1x/1.5x/2x mode switching, and integrates 5-bit linear (32-step) MAIN brightness control. It is used in cellphone/DSC/PDA multi-LED flash modules.
For engineers reviewing the LTC3210EUD-2#TRPBF datasheet, LTC3210EUD-2#TRPBF pinout, LTC3210EUD-2#TRPBF application, or LTC3210EUD-2#TRPBF equivalent, key selection considerations include its 3mm × 3mm QFN-16 package, dual independent current programming via ENM/ENC strobes, open/short LED protection, no-inductor architecture, and guaranteed –40°C to 85°C operation.
Technical Context
The LTC3210EUD-2#TRPBF implements a constant-frequency (800kHz) switched-capacitor charge pump with automatic mode transition logic: it powers up in 1x mode (VBAT → CPO), switches to 1.5x mode (VCPO ≈ 4.55V) upon MAIN/CAM dropout detection, then to 2x mode (VCPO ≈ 5.05V) if further dropout occurs. Mode reset occurs on ENC falling edge or shutdown.
It integrates two independent digital-analog control paths: a 5-bit down-counter + linear DAC for MAIN outputs (32 linear steps, 0–20mA full-scale with RM = 30.1kΩ), and a 3-bit down-counter + linear DAC for CAM output (8 linear steps, 0–380mA full-scale with RC = 24.3kΩ). Both use 150µs latency for current update after strobe completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 4.5V - supports single-cell Li-ion battery operation without external regulation. |
| MAIN LED Output Channels | 4-channel (MLED1–MLED4) - LTC3210EUD-2#TRPBF variant includes fourth MAIN output; all track same current setting. |
| CAM LED Output Current | Up to 380mA - programmable in 8 linear steps via ENC strobes; enables high-intensity camera flash. |
| Brightness Control Resolution | 32-step linear DAC for MAIN - provides fine-grained display backlight dimming without PWM artifacts. |
| Charge Pump Modes | 1x / 1.5x / 2x - auto-switching based on real-time LED dropout detection; eliminates manual mode selection. |
| Shutdown Current | 3µA max - ultra-low quiescent draw during system sleep; extends battery life in portable devices. |
| Package | 3mm × 3mm 16-lead QFN (UD) with exposed thermal pad - optimized for space-constrained mobile PCBs. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN (UD) with exposed GND pad (Pin 17), rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1P, C2P, C1M, C2M (Pins 1, 16, 14, 13) | Flying capacitor connections | Interface with external 2.2µF ceramic flying caps; critical for charge pump efficiency and ripple control. |
| CPO (Pin 2) | Charge pump output rail | Common anode supply for all LEDs; regulated at 4.55V (1.5x) or 5.05V (2x); must be decoupled with 2.2µF ceramic cap to GND. |
| ENM (Pin 3), ENC (Pin 10) | Digital current programming inputs | Strobe-controlled logic inputs: ENM sets MAIN current (31 pulses = min), ENC sets CAM current (7 pulses = min); both low >150µs = shutdown. |
| MLED1–MLED4 (Pins 4–7) | MAIN LED cathode current sinks | Four matched 20mA-capable current sources; MLED4 present only on LTC3210EUD-2#TRPBF (not -3 variant). |
| CLED (Pin 11) | CAM LED cathode current sink | Single 380mA-capable current source; independent of MAIN outputs; shares CPO anode rail. |
| RM (Pin 8), RC (Pin 9) | Current set resistor reference nodes | Internal 1.215V reference; RM sets MAIN full-scale (e.g., 30.1kΩ → 20mA), RC sets CAM full-scale (e.g., 24.3kΩ → 380mA). |
| GND (Pin 12) | Power and signal ground | Primary ground return; exposed pad (Pin 17) must be soldered to PCB ground plane for thermal/electrical performance. |
| VBAT (Pin 15) | Main input supply | Accepts 2.9–4.5V; requires local 2.2µF low-ESR ceramic bypass cap; supplies internal circuitry and charge pump. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic EMI, saves board area, and avoids inductor saturation issues in compact mobile designs. |
| Automatic mode switching | Real-time dropout detection triggers seamless 1x→1.5x→2x transitions-no firmware or external control needed. |
| Independent MAIN/CAM current control | Separate ENM/ENC strobe interfaces allow simultaneous but distinct brightness tuning for display backlight and flash functions. |
| Integrated open/short LED protection | Hardware-level fault detection disables outputs on LED open-circuit or short-circuit conditions-prevents damage and system instability. |
| Low-noise constant-frequency operation | Fixed 800kHz switching minimizes EMI spread; combined with ceramic caps, achieves clean power for image sensors and RF sections. |
Applications
| Cellphone Main Display Backlight | Smartphone Camera Flash Module |
|---|---|
Use Scenario: Driving 3–4 white LEDs behind AMOLED/LCD panel in smartphones with adaptive brightness control. IC Role / Device Role / Timing Role: MAIN LED current controller with 32-step linear DAC; provides flicker-free analog dimming synchronized to display frame rate. Use Value: Enables precise luminance matching across display zones while maintaining color temperature stability under varying battery voltage. | Use Scenario: Powering high-current white LED array for still-image capture in low-light conditions. IC Role / Device Role / Timing Role: CAM LED current source with 8-step linear control; delivers up to 380mA peak current with fast enable/disable timing (≤250µs). Use Value: Supports burst-mode flash operation with minimal thermal rise and no inductor-induced delay in light-on response. |
| Digital Still Camera (DSC) Front Panel UI | PDA Status Indicator Lighting |
Use Scenario: Illuminating status icons and menu buttons on compact DSC front panels using discrete white LEDs. IC Role / Device Role / Timing Role: Low-power MAIN LED driver with soft-start and dropout compensation; operates from partially discharged battery (down to 2.9V). Use Value: Maintains consistent icon brightness across battery discharge cycle without requiring external LDO or buck regulator. | Use Scenario: Providing user-visible status feedback (power-on, sync, error) via multiple small LEDs on legacy PDA form factors. IC Role / Device Role / Timing Role: Multi-channel current sink IC with independent enable control per channel; supports mixed-color LED configurations. Use Value: Reduces BOM count by replacing discrete current-limiting resistors and transistors with single-chip solution in space-constrained layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8630YETE+T | 4-channel MAIN + 1-channel CAM; 32-step MAIN DAC; but uses I²C interface instead of ENM/ENC strobes. | Requires microcontroller GPIO or I²C bus; less suitable for simple hardware-only brightness control. | Choose MAX8630YETE+T when system already uses I²C and needs register-based diagnostics or fault reporting. |
| TPS61165DRVR | Single-output boost LED driver; 1.2MHz switching; supports up to 400mA; no MAIN/CAM separation or multi-channel capability. | Cannot drive MAIN + CAM simultaneously with independent control; lacks 32-step linear dimming. | Choose TPS61165DRVR only for CAM-only flash applications where MAIN backlight is handled separately. |
Compared with MAX8630YETE+T and TPS61165DRVR, the LTC3210EUD-2#TRPBF uniquely combines hardware-strobe simplicity, true dual-path current control, and no-inductor design-making it optimal for cost-sensitive, firmware-light mobile camera subsystems.
Availability
LTC3210EUD-2#TRPBF is available at Aetrix Electronics and suitable for cellphone backlighting, smartphone camera flash modules, and digital still camera UI lighting requiring stable component supply, lead-free compliance, and long-term industrial availability.
Supply support for LTC3210EUD-2#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, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC3210EUD-2#TRPBF belongs to ADI's Linear Technology legacy LED driver product line, engineered specifically for low-noise, high-efficiency multi-LED power management in battery-powered imaging and display systems.
FAQ
What is the maximum total output current supported by the LTC3210EUD-2#TRPBF?
The LTC3210EUD-2#TRPBF supports up to 20mA per MAIN output (4 × 20mA = 80mA) plus up to 380mA on the CAM output, yielding a total of 460mA. However, continuous operation above 300mA is limited by thermal constraints; the datasheet specifies 300mA as the maximum for continuous duty cycle under absolute maximum conditions.
How does the LTC3210EUD-2#TRPBF achieve automatic mode switching between 1x, 1.5x, and 2x charge pump operation?
The LTC3210EUD-2#TRPBF monitors voltage headroom at its LED current sink outputs. When any enabled MAIN or CAM output enters dropout-i.e., its required compliance voltage exceeds available CPO voltage-the device automatically transitions from 1x to 1.5x mode (targeting 4.55V), and further to 2x mode (targeting 5.05V) if dropout persists. This occurs without external intervention and resets to 1x on ENC falling edge or shutdown.
Can the LTC3210EUD-2#TRPBF drive four MAIN LEDs and one CAM LED simultaneously?
Yes, the LTC3210EUD-2#TRPBF is explicitly designed for this configuration: MLED1–MLED4 provide four independent 20mA MAIN current sinks, and CLED provides a dedicated 380mA CAM current sink-all sharing the CPO output rail. The LTC3210EUD-2#TRPBF variant includes MLED4; the -3 variant replaces it with NC.
What is the function of the RM and RC pins on the LTC3210EUD-2#TRPBF?
The RM and RC pins on the LTC3210EUD-2#TRPBF serve as precision current-setting reference nodes. Each internally regulates to 1.215V; connecting resistors from RM/RC to GND sets full-scale MAIN and CAM currents respectively. For example, RM = 30.1kΩ yields ~20mA MAIN full-scale, and RC = 24.3kΩ yields ~380mA CAM full-scale, per the device's internal gain coefficients.
Does the LTC3210EUD-2#TRPBF include built-in protection features?
Yes, the LTC3210EUD-2#TRPBF integrates open-LED and short-LED protection on all outputs. It also features thermal shutdown (activates at ~150°C die temperature), internal soft-start to limit inrush current, and low-shutdown current (3µA max). These protections operate autonomously without external components or host intervention.
LTC3210EUD-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 5
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 4.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 25mA, 400mA
- Frequency:
- 800kHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC3210EUD-2#TRPBF FAQ
1.How can I place an order for LTC3210EUD-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3210EUD-2#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 LTC3210EUD-2#TRPBF reliable?
The price and inventory of LTC3210EUD-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3210EUD-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3210EUD-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3210EUD-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3210EUD-2#TRPBF?
LTC3210EUD-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3210EUD-2#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 LTC3210EUD-2#TRPBF?
For technical support, including LTC3210EUD-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3210EUD-2#TRPBF requirements.
6.How does Aetrix verify that LTC3210EUD-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3210EUD-2#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 LTC3210EUD-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3210EUD-2#TRPBF?
All LTC3210EUD-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3210EUD-2#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 LTC3210EUD-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3210EUD-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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