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Analog Devices Inc. LTC3210EUD-1#TRPBF
- Part No.:
- LTC3210EUD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3210EUD-1#TRPBF.pdf
- Description:
- IC LED DRV RGLTR /400MA 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,329
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Product details
Overview
LTC3210EUD-1#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, multimode charge pump LED driver IC designed to power four MAIN white LEDs (25mA each) and one high-current CAM LED (400mA) in mobile camera lighting systems. It features automatic 1x/1.5x/2x mode switching, 64-step linear brightness control for MAIN outputs, and operates from 2.9V to 4.5V VBAT with 3µA shutdown current.
For engineers reviewing the LTC3210EUD-1#TRPBF datasheet, LTC3210EUD-1#TRPBF pinout, LTC3210EUD-1#TRPBF application, or LTC3210EUD-1#TRPBF equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated QFN-16 pin functions, confirmed alternative parts with documented differences, and supply support for camera module BOMs requiring stable sourcing of high-efficiency LED drivers.
Technical Context
The LTC3210EUD-1#TRPBF implements a constant-frequency (800kHz) switched-capacitor charge pump with automatic mode selection: it powers up in 1x pass-through mode and transitions to 1.5x (4.55V regulated) or 2x (5.05V regulated) boost only when dropout is detected at any LED current source output. Regulation is achieved via internal error amplification sensing CPO voltage against mode-specific reference thresholds.
MAIN LED current is controlled by a 6-bit linear DAC (64 steps, 0–20mA full-scale with RM = 30.1kΩ), strobed via ENM; CAM LED current uses a 3-bit DAC (8 steps, 0–380mA full-scale with RC = 24.3kΩ), strobed via ENC. Both DACs feature 150µs settling time and independent soft-start during mode transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 2.9V to 4.5V - supports single-cell Li-ion battery input without external LDO pre-regulation. |
| Max Total Output Current | 500mA - enables simultaneous drive of 4× MAIN LEDs (25mA each) + 1× CAM LED (400mA). |
| Main LED Current Range | 0–20mA per channel (64 linear steps) - provides flicker-free, high-resolution display backlight dimming. |
| CAM LED Current Range | 0–380mA (8 linear steps) - delivers sufficient current for short-duration flash illumination in compact camera modules. |
| Charge Pump Modes | 1x / 1.5x / 2x - auto-switching minimizes power loss by using lowest possible voltage gain to maintain LED regulation. |
| Shutdown Current | 3µA - preserves battery life during idle periods in portable devices. |
| Package | 3mm × 3mm × 0.75mm 16-lead QFN - exposes thermal pad for PCB heat sinking; compatible with standard reflow profiles. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN with exposed thermal pad (Pin 17, GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1P, C2P, C1M, C2M (Pins 1,16,14,13) | Flying capacitor connections | Interface with external 2.2µF ceramic capacitors to form charge pump flying network; high dv/dt nodes requiring tight layout. |
| CPO (Pin 2) | Charge pump output rail | Common anode supply for all LEDs; regulated at VBAT (1x), 1.5×VBAT (1.5x), or 2×VBAT (2x); requires 2.2µF X5R/X7R bypass to GND. |
| ENM, ENC (Pins 3,10) | Digital brightness control inputs | Strobe-based programming: ENM controls MAIN current (63 pulses = min), ENC controls CAM current (7 pulses = min); both low >150µs triggers shutdown. |
| MLED1–MLED4 (Pins 4–7) | MAIN LED cathode current sinks | Four independent 25mA low-dropout current sources; each connects LED cathode to GND-referenced sink while anode ties to CPO. |
| CLED (Pin 11) | CAM LED cathode current sink | Single 400mA low-dropout current source optimized for flash duty cycle; shares same CPO anode rail as MAIN outputs. |
| RM, RC (Pins 8,9) | Full-scale current programming resistors | Resistors from RM/RC to GND set full-scale current: RM sets MAIN (≈535×1.215V/(RM+500Ω)), RC sets CAM (≈7700×1.215V/(RC+500Ω)). |
| VBAT (Pin 15) | Input power supply | Accepts 2.9–4.5V battery input; requires local 2.2µF low-ESR ceramic decoupling capacitor. |
| GND (Pin 12) | Power and signal ground | Low-impedance return path for all currents; must connect to solid ground plane and exposed pad. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic EMI and board space for inductors-critical for thin mobile camera modules. |
| Automatic mode switching | Real-time detection of LED dropout triggers seamless transition between 1x/1.5x/2x modes without firmware intervention. |
| Independent MAIN/CAM control | Separate ENM/ENC strobe interfaces allow concurrent but distinct brightness adjustment for display backlight and flash illumination. |
| Open/short LED protection | Internal circuitry disables affected output and limits fault current if LED string opens or shorts to CPO or GND. |
| Thermal shutdown | Activates at ~150°C die temperature and releases at ~135°C-prevents damage during sustained high-current operation. |
Applications
| Smartphone Camera Flash | Tablet Display Backlight |
|---|---|
Use Scenario: Short-duration, high-intensity illumination for still image capture in low-light conditions. IC Role / Device Role / Timing Role: CAM LED current source delivering up to 400mA peak current with precise 8-step linear control via ENC strobes. Use Value: Enables consistent flash luminance across varying battery voltage (2.9–4.5V) without external voltage boosting or complex sequencing. |
Use Scenario: Smooth, flicker-free dimming of main LCD backlight in handheld tablets. IC Role / Device Role / Timing Role: Four-channel MAIN LED driver with 64-step linear DAC providing uniform current matching (<0.5%) across MLED1–MLED4. Use Value: Achieves >1000:1 effective dimming range (via PWM + analog) while maintaining color consistency and minimizing EMI from inductorless operation. |
| Digital Still Camera (DSC) | PDA Main Display |
Use Scenario: Compact, low-profile camera module requiring integrated LED power management and minimal external components. IC Role / Device Role / Timing Role: Single-chip solution integrating charge pump, MAIN/CAM current sources, and digital brightness interface-replaces discrete MOSFET + boost converter + DAC combos. Use Value: Reduces bill-of-materials to just four 2.2µF ceramics and two precision resistors, cutting PCB area by >40% vs. inductor-based alternatives. |
Use Scenario: Legacy PDA with monochrome or color TFT display needing reliable, low-noise backlight drive from aging Li-ion cells. IC Role / Device Role / Timing Role: Low-quiescent (0.4mA in 1x mode) LED driver maintaining regulation down to 2.9V VBAT with soft-start to prevent supply droop. Use Value: Extends usable battery life by avoiding unnecessary 1.5x/2x mode activation until true dropout occurs-maximizing efficiency across discharge curve. |
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 architecture; fixed 1.5x/2x modes only; no 1x pass-through; 32-step MAIN control. | Lacks automatic 1x mode-higher quiescent current at high VBAT; less efficient for mid-battery voltages. | Select when system prioritizes guaranteed minimum CPO voltage over peak efficiency; verify thermal derating at 400mA CAM load. |
| TPS61165DRVR | Single-output boost LED driver (up to 400mA); no MAIN LED channels; uses inductor; 256-step I²C-controlled brightness. | Requires separate MAIN driver IC; introduces inductor EMI and size penalty; supports I²C instead of simple strobe interface. | Choose only if I²C system-level control is mandatory and board space allows inductor placement; not a functional replacement for dual MAIN/CAM integration. |
Compared with MAX8630YETE+T and TPS61165DRVR, the LTC3210EUD-1#TRPBF uniquely combines 1x pass-through efficiency, automatic mode switching, and integrated MAIN+CAM control in a single no-inductor QFN-making it optimal for space-constrained, battery-sensitive camera modules where component count and EMI must be minimized.
Availability
LTC3210EUD-1#TRPBF is available at Aetrix Electronics and suitable for smartphone camera modules, tablet display backlights, and digital still camera (DSC) designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for LTC3210EUD-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 legacy of high-performance power management ICs with rigorous automotive-grade reliability testing and precision analog design expertise.
The LTC3210EUD-1#TRPBF belongs to Linear's specialized LED driver product line, engineered specifically for mobile imaging applications demanding ultra-low noise, high integration, and adaptive efficiency in minimal footprint.
FAQ
What is the maximum continuous CAM LED current supported by the LTC3210EUD-1#TRPBF?
The LTC3210EUD-1#TRPBF supports up to 400mA continuous current on the CLED output under specified thermal conditions. Absolute maximum rating is 500mA, but continuous operation above 300mA requires careful PCB thermal design-including full soldering of the exposed pad to a multi-layer ground plane-to avoid thermal shutdown at ambient temperatures above 60°C.
How does the LTC3210EUD-1#TRPBF achieve automatic mode switching between 1x, 1.5x, and 2x?
The LTC3210EUD-1#TRPBF monitors voltage headroom at each LED current source output. When dropout is detected-i.e., insufficient voltage across the current source to maintain programmed current-the device automatically transitions to the next higher charge pump mode (1x → 1.5x → 2x) within 0.4ms. The LTC3210EUD-1#TRPBF resets to 1x mode upon shutdown or falling edge of ENC.
Can the LTC3210EUD-1#TRPBF drive MAIN and CAM LEDs simultaneously with independent brightness control?
Yes. The LTC3210EUD-1#TRPBF supports concurrent operation: ENM strobes adjust MAIN LED current (64 steps) while ENC strobes independently adjust CAM LED current (8 steps). Both outputs share the CPO rail, so total current must remain within 500mA limit. The LTC3210EUD-1#TRPBF ensures no crosstalk between MAIN and CAM control paths due to separate DACs and counters.
What external components are required for basic operation of the LTC3210EUD-1#TRPBF?
Only four 2.2µF X7R/X5R ceramic capacitors (C1P–C1M, C2P–C2M, CPO–GND, VBAT–GND) and two precision resistors (RM for MAIN full-scale, RC for CAM full-scale) are required. No inductors, diodes, or additional ICs are needed-enabling a complete 5-LED driver solution in <12mm² PCB area. The LTC3210EUD-1#TRPBF integrates all regulation, DACs, and protection logic internally.
Is the LTC3210EUD-1#TRPBF pin-compatible with other variants in the LTC3210 family?
No. The LTC3210EUD-1#TRPBF is functionally and pin-compatible only with the LTC3210EUD-1#PBF (same UD package, tray vs. tape-and-reel). It is not pin-compatible with LTC3210EPD-1 variants (UTQFN package) or non–"-1" versions (e.g., LTC3210EUD#TRPBF), which differ in MAIN/CAM current ratios, DAC resolution, or enable logic. Always verify part marking "LCBT" and datasheet revision before substitution.
LTC3210EUD-1#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-1#TRPBF FAQ
1.How can I place an order for LTC3210EUD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3210EUD-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 LTC3210EUD-1#TRPBF reliable?
The price and inventory of LTC3210EUD-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 LTC3210EUD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3210EUD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3210EUD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3210EUD-1#TRPBF?
LTC3210EUD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3210EUD-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 LTC3210EUD-1#TRPBF?
For technical support, including LTC3210EUD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3210EUD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3210EUD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3210EUD-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 LTC3210EUD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3210EUD-1#TRPBF?
All LTC3210EUD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3210EUD-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 LTC3210EUD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3210EUD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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