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Analog Devices Inc. LTC3210EPD-1#TRPBF
- Part No.:
- LTC3210EPD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
LTC3210EPD-1#TRPBF.pdf
- Description:
- IC LED DRV RGLTR /400MA 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,948
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Product details
Overview
LTC3210EPD-1#TRPBF from Analog Devices (formerly Linear Technology) is a low-noise, multimode charge pump LED driver IC designed to power four 25mA MAIN display LEDs and one 400mA CAM LED in mobile imaging systems. It features automatic 1x/1.5x/2x mode switching, 64-step linear brightness control for MAIN outputs, and independent current programming via external resistors RM and RC. It operates from 2.9V to 4.5V VBAT and delivers up to 500mA total output current in a compact 16-lead UTQFN package.
For engineers reviewing the LTC3210EPD-1#TRPBF datasheet, LTC3210EPD-1#TRPBF pinout, LTC3210EPD-1#TRPBF application, or LTC3210EPD-1#TRPBF equivalent, key selection criteria include its 64-step MAIN DAC resolution, 400mA CAM output capability, 3µA shutdown current, open/short LED protection, and compatibility with ceramic-only external components - all critical for space-constrained, low-noise camera lighting designs.
Technical Context
The LTC3210EPD-1#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 (target VCPO = 4.55V) upon MAIN or CAM dropout detection, and escalates to 2x mode (target VCPO = 5.05V) if dropout persists. Mode switching delay is 0.4ms, and soft-start limits inrush during transitions.
LED current control uses two independent digital counters driving internal DACs: a 6-bit down counter (64 steps, 0–20mA per MAIN output with RM = 30.1kΩ) controlled by ENM strobes, and a 3-bit down counter (8 steps, 0–380mA CAM output with RC = 24.3kΩ) controlled by ENC strobes. Both counters latch after 150µs and reset on low hold >150µs, enabling shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 4.5V - supports single-cell Li-ion battery operation across full discharge curve. |
| Main LED Output | Four 25mA current sources with ≤75mV dropout voltage - enables efficient driving of white LEDs at low forward voltages. |
| CAM LED Output | One 400mA current source with ≤500mV dropout voltage - delivers high-current flash illumination without external MOSFET. |
| Brightness Control | 64-step linear DAC for MAIN (ENM), 8-step linear DAC for CAM (ENC) - provides fine-grained, flicker-free dimming via simple GPIO strobing. |
| Charge Pump Modes | 1x (direct pass), 1.5x (4.55V regulated), 2x (5.05V regulated) - auto-selects optimal efficiency mode based on real-time LED voltage headroom. |
| Shutdown Current | 3µA typical - minimizes battery drain during idle periods in portable devices. |
| Package | 16-lead 3mm × 3mm × 0.55mm UTQFN (exposed pad) - thermally enhanced for high-current LED drive in ultra-thin form factors. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic UTQFN, 0.55mm height, exposed thermal pad (Pin 17, GND). Pin pitch: 0.5mm. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1P, C2P, C1M, C2M (Pins 1, 16, 14, 13) | Flying capacitor connections | Interface with four 2.2µF ceramic flying caps; topology determines charge pump mode (1.5x/2x); sensitive to layout parasitics. |
| CPO (Pin 2) | Charge pump output rail | Common anode supply for all five LEDs; regulated at 4.55V (1.5x) or 5.05V (2x); requires 2.2µF X5R/X7R ceramic to GND. |
| ENM, ENC (Pins 3, 10) | Digital brightness control inputs | Strobe-controlled logic inputs: ENM sets MAIN current (63 pulses = min), ENC sets CAM current (7 pulses = min); low hold >150µs triggers shutdown. |
| MLED1–MLED4 (Pins 4–7) | Main LED cathode current sinks | Four independent 25mA current sources; each connects LED cathode to GND reference; disabled by shorting to CPO. |
| CLED (Pin 11) | Camera LED cathode current sink | Single 400mA current source for flash LED; shares CPO anode; programmed via ENC strobes and RC resistor. |
| RM, RC (Pins 8, 9) | Current set reference nodes | Internal 1.215V reference pins; external resistors to GND set full-scale MAIN (RM) and CAM (RC) currents per datasheet equations. |
| GND (Pin 12) | Power and signal ground | Low-impedance return path; must connect exposed pad (Pin 17) directly to PCB ground plane for thermal and noise performance. |
| VBAT (Pin 15) | Input power supply | 2.9–4.5V battery input; requires local 2.2µF low-ESR ceramic bypass; supplies charge pump and logic circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic EMI and board area; uses only five 2.2µF ceramic capacitors and two precision resistors for full solution. |
| Automatic mode optimization | Real-time dropout detection triggers seamless 1x→1.5x→2x transitions - maximizes efficiency without firmware intervention. |
| Independent MAIN/CAM control | Separate ENM/ENC strobe interfaces allow concurrent but distinct brightness adjustment for display backlight and flash functions. |
| Robust fault protection | Integrated open/short LED detection, thermal shutdown (~150°C), and overcurrent lockout prevent damage during abnormal conditions. |
| Low-noise constant-frequency operation | 800kHz fixed-frequency switching enables predictable EMI filtering and avoids audible noise in sensitive audio-adjacent layouts. |
Applications
| Smartphone Camera Flash | Tablet Display Backlight |
|---|---|
|
Use Scenario: High-intensity, brief-duration flash illumination for low-light photography in smartphones. IC Role / Device Role / Timing Role: CAM LED current source delivering up to 400mA peak current with precise timing control via ENC strobes. Use Value: Enables single-chip flash solution with no external MOSFET or inductor, reducing BOM count and PCB area while maintaining thermal safety. |
Use Scenario: Uniform, flicker-free backlighting for high-resolution LCD displays in tablets. IC Role / Device Role / Timing Role: Four-channel MAIN LED driver with 64-step linear DAC providing smooth analog-like dimming via ENM pulses. Use Value: Achieves >60dB contrast ratio and <1% current matching across channels - critical for color accuracy and viewing angle consistency. |
| Digital Still Camera (DSC) UI Lighting | PDA Status Indicator Array |
|
Use Scenario: Bright, programmable status lighting for menu navigation and focus assist in compact DSCs. IC Role / Device Role / Timing Role: MAIN LED controller powering four discrete indicator LEDs with independent current tuning via RM resistor. Use Value: Supports dynamic UI feedback (e.g., battery level, recording state) using minimal board space and zero inductors. |
Use Scenario: Low-power, multi-color status indication for legacy PDAs with limited battery capacity. IC Role / Device Role / Timing Role: Dual-mode LED driver operating in 1x pass-through mode for efficiency when VBAT > LED VF + dropout margin. Use Value: Extends battery life by >25% vs fixed-boost drivers through adaptive mode selection and 3µA shutdown current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61165DRVR | Boost converter with integrated 1.2A switch; requires external inductor; 1.2MHz switching; no built-in CAM/MAIN separation. | Higher peak current (1.2A) but less precise multi-channel control; suited for single high-current LED or parallel strings. | Choose TPS61165DRVR when inductor-based boost efficiency >90% is prioritized over board area and EMI constraints. |
| MAX16822AATA+ | Linear LED driver with PWM dimming; no charge pump; max 350mA per channel; requires heat sinking above 200mA. | Lower efficiency at high currents due to linear regulation; simpler control interface but no automatic mode switching. | Choose MAX16822AATA+ for cost-sensitive, low-EMI applications where thermal management allows linear operation. |
Compared with LTC3210EPD-1#TRPBF, TPS61165DRVR offers higher current headroom but increases solution size and EMI risk, while MAX16822AATA+ simplifies design at the expense of efficiency and thermal performance in high-brightness modes.
Availability
LTC3210EPD-1#TRPBF is available at Aetrix Electronics and suitable for smartphone camera modules, tablet display backlights, and portable imaging device production requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3210EPD-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and consumer markets.
The LTC3210EPD-1#TRPBF belongs to ADI's Power Management product line, engineered specifically for compact, high-efficiency LED lighting in battery-powered imaging devices where inductor-free design and precise multi-channel control are essential.
FAQ
What is the maximum total output current supported by the LTC3210EPD-1#TRPBF?
The LTC3210EPD-1#TRPBF supports up to 500mA total output current: 4 × 25mA (100mA) across MLED1–MLED4 for MAIN display LEDs, plus up to 400mA on CLED for camera flash. This is confirmed in the "Features" section and Electrical Characteristics table under "Up to 500mA Total Output Current" and "CLED Current" specifications.
Does the LTC3210EPD-1#TRPBF require external inductors?
No, the LTC3210EPD-1#TRPBF uses a switched-capacitor charge pump architecture and requires only five external ceramic capacitors (four 2.2µF flying caps and one 2.2µF CPO output cap) and two current-setting resistors. Inductors are explicitly excluded - a key advantage for EMI-sensitive, space-constrained mobile designs.
How does brightness control work on the LTC3210EPD-1#TRPBF?
The LTC3210EPD-1#TRPBF uses two independent strobe-controlled digital interfaces: ENM pulses (up to 63) adjust MAIN LED current via a 6-bit linear DAC (64 steps), while ENC pulses (up to 7) adjust CAM LED current via a 3-bit linear DAC (8 steps). Each pulse decrements the respective counter; latching occurs after 150µs, and holding ENM/ENC low >150µs enters shutdown.
What protection features does the LTC3210EPD-1#TRPBF include?
The LTC3210EPD-1#TRPBF integrates open/short LED detection, thermal shutdown (~150°C), overcurrent lockout (triggered by RM/RC <12kΩ), and soft-start limiting for both startup and mode transitions. These are documented in the "Features" list and "Operation" section under "Protection" subsections.
Is the LTC3210EPD-1#TRPBF pin-compatible with other variants in the LTC3210 family?
No - the LTC3210EPD-1#TRPBF uses a 16-lead UTQFN package (LCXT marking), whereas the LTC3210EUD-1#TRPBF uses a 16-lead QFN (LCBT marking). Though pin functions match, the UTQFN has different thermal pad configuration and mechanical dimensions; PCB layout is not interchangeable.
LTC3210EPD-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
LTC3210EPD-1#TRPBF FAQ
1.How can I place an order for LTC3210EPD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3210EPD-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 LTC3210EPD-1#TRPBF reliable?
The price and inventory of LTC3210EPD-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 LTC3210EPD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3210EPD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3210EPD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3210EPD-1#TRPBF?
LTC3210EPD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3210EPD-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 LTC3210EPD-1#TRPBF?
For technical support, including LTC3210EPD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3210EPD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3210EPD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3210EPD-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 LTC3210EPD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3210EPD-1#TRPBF?
All LTC3210EPD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3210EPD-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 LTC3210EPD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3210EPD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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