My Inquiry
My Account
Analog Devices Inc. LTC3209EUF-2#TRPBF
- Part No.:
- LTC3209EUF-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3209EUF-2#TRPBF.pdf
- Description:
- IC LED DRV RGLTR I2C 600MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3209EUF-2#TRPBF from Analog Devices (formerly Linear Technology) is a highly integrated multimode charge pump LED controller optimized for dual-camera mobile devices. It delivers up to 200mA per CAM channel (2 × 200mA), 5 × 25mA MAIN display current, and 15mA AUX current via I²C-programmable 4-/8-/2-bit DACs; supports automatic 1x/1.5x/2x mode switching; and operates in a 4mm × 4mm 20-lead QFN package with thermal protection and short-circuit safety.
For engineers reviewing the LTC3209EUF-2#TRPBF datasheet, LTC3209EUF-2#TRPBF pinout, LTC3209EUF-2#TRPBF application, or LTC3209EUF-2#TRPBF equivalent, key selection criteria include dual-CAM current sourcing capability, I²C-controlled 16-level brightness per CAM channel, 256-step MAIN dimming, charge pump efficiency up to 94%, and thermal shutdown at ~150°C - all critical for compact camera phone backlight and flash power management.
Technical Context
The LTC3209EUF-2#TRPBF implements a switched-capacitor charge pump with fixed 850kHz clocking and automatic mode transitions triggered by dropout detection on MAIN or CAM outputs. Its control logic uses two independent 4-bit DAC registers (CAM high/low) selectable via CAMHL pin or I²C, enabling rapid flash-current switching without bus re-access.
It features internal soft-start (125µs ramp), 1.23V RREF reference with 20k–30kΩ resistor range, DVCC UVLO at 1V, and VBAT UVLO at 1.5V. The device enforces strict thermal shutdown (150°C) and disables all current sources and charge pump during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Pump Modes | 1x (direct pass-through), 1.5x (up to 4.6V), 2x (up to 5.1V); auto-switched on dropout or forced via REGC bits |
| CAM Output Current | 2 × 200mA max (per channel), 4-bit linear DAC, 16 brightness levels each |
| MAIN Output Current | 5 × 25mA max (per channel), 8-bit linear DAC, 256 brightness states |
| AUX Output Current | 15mA max, 2-bit linear DAC, 4 brightness states (OFF/33%/67%/100%) |
| Efficiency | Up to 94% in 1x mode; optimized across load and input voltage (VBAT = 2.9–4.5V) |
| Operating Temp | –40°C to +85°C ambient; thermal shutdown at ~150°C junction temperature |
| I²C Interface | Standard 2-wire, 400kHz max clock; DVCC-referenced logic (1.5–4.5V); supports repeated start/stop |
Pinout & Package
Package: 20-lead (4mm × 4mm) plastic QFN with exposed pad (Pin 21 = GND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPO (Pin 1) | Charge pump output | Supplies boosted voltage (1x/1.5x/2x) to all LED current sources; requires 2.2µF ceramic capacitor to GND |
| MAIN1–5 (Pins 2–6) | Main display current sources | Each provides 0–28mA via 8-bit DAC; disabled by writing 0 to REGA or connecting to CPO |
| AUX (Pin 7) | Auxiliary current source | 0–13.75mA, 2-bit DAC; no dropout sensing; usable as I²C-controlled open-drain output |
| VBAT1, VBAT2 (Pins 8, 18) | Power supply inputs | Separate pins isolate analog/digital noise paths; both must connect externally and bypass with 2.2µF (VBAT1) + 0.1µF (VBAT2) |
| RREF (Pin 9) | Reference current set | 1.23V internal reference; 24.3kΩ resistor sets full-scale currents for MAIN/CAM/AUX |
| DVCC (Pin 10) | Digital supply | Logic reference (1.5–4.5V); UVLO at 1V forces all registers to zero; bypass with 0.1µF |
| CAM1, CAM2 (Pins 11, 12) | Camera current sources | Each provides 0–200mA via 4-bit DAC; selectable high/low registers via CAMHL or I²C |
| CAMHL (Pin 13) | Camera register select | High = CAM high register (flash), low = CAM low register; falling edge resets charge pump to 1x mode |
| SDA, SCL (Pins 14, 15) | I²C interface | Standard bidirectional data/clock; referenced to DVCC; support 400kHz operation and repeated start |
| C1P/C1M/C2P/C2M (Pins 16–20) | Flying capacitor connections | Two 2.2µF ceramic caps required (C1P–C1M, C2P–C2M) for charge pump operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent CAM current sources | Enables simultaneous front/rear camera flash control with separate 16-level brightness tuning per channel |
| Automatic 1x→1.5x→2x mode switching | Reduces system power loss by dynamically matching CPO voltage to LED forward voltage + dropout margin |
| CAMHL pin fast register toggle | Switches between high/low camera current modes in <2ms without I²C transaction overhead |
| Integrated thermal and short-circuit protection | Shuts down all outputs at ~150°C junction temp and disables charge pump on LED open/short faults |
| Low-noise constant-frequency operation | 850kHz fixed clock minimizes EMI and avoids audible noise in sensitive mobile audio subsystems |
Applications
| Smartphone Dual-Camera Flash | QVGA+ Main Display Backlight |
|---|---|
Use Scenario: Simultaneous illumination of front-facing and rear-facing cameras during video capture or still photography. IC Role / Device Role / Timing Role: Dual 200mA current source driver with independent 4-bit DAC control and CAMHL-triggered fast mode switching. Use Value: Enables precise, low-latency flash intensity matching between cameras while minimizing battery drain via adaptive 1.5x/2x charge pump operation. | Use Scenario: Uniform backlighting of high-resolution main LCD displays in smartphones and portable media players. IC Role / Device Role / Timing Role: 5-channel 25mA white LED driver with 256-step linear dimming via I²C. Use Value: Delivers smooth, flicker-free brightness control across wide luminance range while maintaining color consistency and power efficiency. |
| Mobile Device AUX Indicator | Compact Camera Module Power Management |
Use Scenario: Status indication using single-color auxiliary LED (e.g., charging, notification, proximity). IC Role / Device Role / Timing Role: 2-bit programmable 15mA current source with optional open-drain digital output mode. Use Value: Reduces BOM count by consolidating indicator LED drive and general-purpose I/O in one pin without external components. | Use Scenario: Powering integrated camera modules requiring separate MAIN (preview) and CAM (flash) current paths. IC Role / Device Role / Timing Role: Single-chip solution providing isolated MAIN display drive and dual-CAM flash control with shared charge pump and I²C interface. Use Value: Eliminates need for discrete boost converters and multiple LED drivers, saving PCB area and simplifying layout in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97682IRTZ-T7A | Single-CAM architecture (1 × 400mA), 6 MAIN channels, no CAMHL pin | Suitable for single-camera phones; lacks dual-CAM fast-toggle capability | Select when only one high-current flash path is needed and board space allows larger 24-QFN package |
| LM3644TME/NOPB | Twin 300mA CAM outputs, but uses 1.8V I²C logic and different RREF scaling (no 24.3kΩ standard) | Requires level-shifting for 3V DVCC systems; higher quiescent current in 1x mode | Prefer for designs already committed to TI ecosystem and 1.8V logic domains |
Compared with ISL97682IRTZ-T7A and LM3644TME/NOPB, the LTC3209EUF-2#TRPBF uniquely supports dual independent 200mA CAM channels with hardware-accelerated register switching via CAMHL, making it optimal for dual-camera flash synchronization without I²C bus contention or timing latency.
Availability
LTC3209EUF-2#TRPBF is available at Aetrix Electronics and suitable for smartphone camera modules, QVGA+ display backlighting, and compact mobile device auxiliary lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3209EUF-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, acquired Linear Technology in 2017 to strengthen its power management portfolio.
The LTC3209EUF-2#TRPBF belongs to ADI's legacy Linear Technology LED controller product line, designed specifically for space-constrained mobile imaging systems requiring high-efficiency, multi-rail LED current regulation with minimal external components.
FAQ
What is the maximum total output current capability of the LTC3209EUF-2#TRPBF?
The LTC3209EUF-2#TRPBF supports up to 5 × 25mA = 125mA for MAIN LEDs, 2 × 200mA = 400mA for CAM LEDs, and 15mA for AUX - totaling 540mA peak. However, continuous operation is limited to 300mA for the charge pump (per datasheet Note 4), so sustained combined loads must stay within this thermal boundary. The LTC3209EUF-2#TRPBF achieves this with automatic mode switching and thermal shutdown at ~150°C.
How does the CAMHL pin affect charge pump operation in the LTC3209EUF-2#TRPBF?
The CAMHL pin on the LTC3209EUF-2#TRPBF selects between high- and low-current CAM registers and triggers immediate 1x mode reset on falling edge. When asserted high, it reduces dropout delay from 150ms to 2ms, enabling rapid flash-current ramp-up. This hardware control bypasses I²C latency, making the LTC3209EUF-2#TRPBF ideal for time-critical dual-camera flash sequencing.
Can the AUX pin of the LTC3209EUF-2#TRPBF be used as a general-purpose I²C-controlled output?
Yes - the AUX pin of the LTC3209EUF-2#TRPBF functions as both a 2-bit programmable current source (0–13.75mA) and an I²C-controlled open-drain digital output. When configured in digital mode (via REGC bits), it sinks current up to 15mA with VOL ≤ 18mV at 1mA, enabling direct LED drive or logic-level signaling without external transistors - a feature unique among comparable LED controllers.
What external components are required to operate the LTC3209EUF-2#TRPBF?
The LTC3209EUF-2#TRPBF requires only four 2.2µF X5R/X7R ceramic capacitors (C1P/C1M, C2P/C2M, CPO-to-GND, and VBAT1 bypass), one 24.3kΩ 1% resistor (RREF), and a 0.1µF capacitor on DVCC. No inductors or diodes are needed - the fully integrated switched-capacitor charge pump eliminates magnetic components, reducing EMI and board area versus inductive boost solutions.
Does the LTC3209EUF-2#TRPBF support fixed charge pump mode operation?
Yes - the LTC3209EUF-2#TRPBF supports fixed-mode operation via REGC bits Force1p5 and Force2x. Setting Force2x=1 overrides all dropout logic and locks the charge pump at 2x mode (CPO regulated to 5.1V), while Force1p5=1 holds 1.5x mode (4.6V). This enables use as a stable, low-noise auxiliary power rail - a capability confirmed in the datasheet's "Fixed Mode for Power Supply Generation" feature list.
LTC3209EUF-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-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:
- 8
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 4.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 600mA (Total)
- Frequency:
- 850kHz
- Dimming:
- I2C
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
LTC3209EUF-2#TRPBF FAQ
1.How can I place an order for LTC3209EUF-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3209EUF-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 LTC3209EUF-2#TRPBF reliable?
The price and inventory of LTC3209EUF-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 LTC3209EUF-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3209EUF-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3209EUF-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3209EUF-2#TRPBF?
LTC3209EUF-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3209EUF-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 LTC3209EUF-2#TRPBF?
For technical support, including LTC3209EUF-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3209EUF-2#TRPBF requirements.
6.How does Aetrix verify that LTC3209EUF-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3209EUF-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 LTC3209EUF-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3209EUF-2#TRPBF?
All LTC3209EUF-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3209EUF-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 LTC3209EUF-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3209EUF-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3209EUF-2#TRPBF Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
