My Inquiry
My Account
Analog Devices Inc. LTC3210EUD-3#PBF
- Part No.:
- LTC3210EUD-3#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3210EUD-3#PBF.pdf
- Description:
- IC LED DRV RGLTR /400MA 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3210EUD-3#PBF from Analog Devices (formerly Linear Technology) is a low-noise, multimode charge pump DC/DC converter IC designed to drive three MAIN LEDs and one high-current CAM LED in mobile camera lighting systems. It delivers up to 20mA per MAIN output and 380mA on the CAM output, features 32-step linear brightness control for MAIN LEDs, operates across 2.9V–4.5V input, and uses only four ceramic capacitors and two external resistors. It is used in cellphone/DSC/PDA camera flash modules requiring compact, inductorless, low-EMI LED power.
For engineers reviewing the LTC3210EUD-3#PBF datasheet, LTC3210EUD-3#PBF pinout, LTC3210EUD-3#PBF application, or LTC3210EUD-3#PBF equivalent, key selection considerations include its 3mm × 3mm QFN-16 package, automatic 1x/1.5x/2x mode switching, 800kHz fixed-frequency operation, open/short LED protection, and dual independent current programming via ENM/ENC strobes.
Technical Context
The LTC3210EUD-3#PBF implements a switched-capacitor charge pump with three operating modes (1x, 1.5x, 2x), automatically transitioning based on LED dropout detection at MLED or CLED pins. Its internal 5-bit linear DAC controls MAIN LED current in 32 discrete steps (0–20mA), while a separate 3-bit DAC sets CAM LED current in 8 steps (0–380mA).
Regulation is achieved by sensing CPO voltage and modulating pump strength; 1.5x mode regulates at 4.55V and 2x mode at 5.05V. The device integrates soft-start, thermal shutdown (~150°C), and 3µA shutdown current, with all logic inputs (ENM/ENC) featuring 0.4V VIL and 1.4V VIH thresholds over –40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 4.5V - supports single-cell Li-ion/Li-poly battery operation without LDO pre-regulation. |
| MAIN LED Output Current | Up to 20mA per channel (3 channels) - set by RM resistor and 5-bit DAC; enables uniform backlighting for small displays. |
| CAM LED Output Current | Up to 380mA - set by RC resistor and 3-bit DAC; sufficient for brief high-intensity camera flash pulses. |
| Charge Pump Modes | 1x / 1.5x / 2x - auto-switching avoids dropout; 1.5x mode delivers 4.55V, 2x delivers 5.05V at CPO. |
| Switching Frequency | 800kHz - enables use of small 2.2µF ceramic flying/output capacitors; reduces EMI vs lower-frequency pumps. |
| Shutdown Current | 3µA max - minimizes battery drain during idle; triggered by holding ENM and ENC low >150µs. |
| Package | 16-lead 3mm × 3mm QFN with exposed pad - provides low thermal resistance (θJA = 68°C/W) and space-efficient integration. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN with exposed thermal pad (Pin 17, connected to 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 caps to enable charge transfer in 1.5x/2x modes; high dv/dt nodes require tight layout. |
| CPO (Pin 2) | Charge pump output | Supplies power to all LED anodes; regulated at 4.55V (1.5x) or 5.05V (2x); requires 2.2µF ceramic output capacitor to ground. |
| ENM (Pin 3), ENC (Pin 10) | Digital current programming inputs | Strobe-controlled interfaces: ENM decrements 5-bit MAIN DAC (32 steps), ENC decrements 3-bit CAM DAC (8 steps); both low >150µs triggers shutdown. |
| MLED1–MLED3 (Pins 4–6) | MAIN LED current sinks | Three 20mA-capable constant-current outputs; cathodes connect to LEDs, anodes to CPO; matched within 0.5%. |
| NC (Pin 7) | No-connect | Not internally bonded; must be left floating or tied to GND - distinguishes LTC3210-3 from LTC3210-2 (which has MLED4 here). |
| RM (Pin 8), RC (Pin 9) | Current sense reference inputs | Internal 1.215V reference; external resistors to GND set full-scale MAIN (RM) and CAM (RC) currents per IFS = (1.215V/(R + 500Ω)) × gain. |
| CLED (Pin 11) | CAM LED current sink | Single 380mA constant-current output; cathode connects to CAM LED, anode to CPO; dropout voltage ≤500mV at full scale. |
| GND (Pin 12) | Power and signal ground | Low-impedance return path for all currents; must connect to solid ground plane and exposed pad. |
| VBAT (Pin 15) | Input supply | Accepts 2.9–4.5V battery input; requires ≥2.2µF low-ESR ceramic bypass capacitor close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless charge pump architecture | Eliminates magnetic components and associated EMI; enables ultra-thin mobile designs with minimal BOM count. |
| Independent MAIN/CAM current programming | Separate ENM/ENC strobe control and RM/RC resistors allow simultaneous but distinct brightness tuning for display and flash functions. |
| 32-step linear MAIN brightness control | 5-bit DAC delivers precise, flicker-free dimming from 0–20mA per MAIN LED - critical for smooth UI transitions and video recording. |
| Automatic mode switching (1x → 1.5x → 2x) | Real-time dropout detection at LED pins triggers seamless voltage boosting, maintaining regulation without software intervention. |
| Integrated open/short LED protection | Monitors MLED/CLED pins and disables outputs on fault, preventing damage during LED disconnection or short-circuit events. |
Applications
| Cellphone Camera Flash | Portable DSC Lighting |
|---|---|
Use Scenario: Brief high-intensity illumination for still image capture in low-light conditions using a single white LED array. IC Role / Device Role / Timing Role: LTC3210EUD-3#PBF acts as the primary CAM LED current driver and voltage booster, delivering up to 380mA with <500mV dropout. Use Value: Enables compact, inductorless flash solution with fast turn-on (<250µs enable time) and automatic voltage scaling to maintain brightness across battery discharge. | Use Scenario: Powering multiple MAIN LEDs for LCD backlighting in digital still cameras during preview and menu navigation. IC Role / Device Role / Timing Role: LTC3210EUD-3#PBF serves as a 3-channel MAIN LED driver with 32-step linear dimming, synchronized via ENM strobes. Use Value: Provides smooth, consistent backlight intensity control without PWM-induced flicker, supporting accurate color rendering and low-power UI operation. |
| PDA Display Backlight | Ultra-Compact Camera Module |
Use Scenario: Driving three parallel MAIN LEDs for monochrome or color TFT backlight in handheld PDAs with limited board area. IC Role / Device Role / Timing Role: LTC3210EUD-3#PBF functions as a space-optimized, low-noise LED driver with integrated soft-start and thermal protection. Use Value: Delivers stable 20mA per channel with <0.5% matching, minimizing luminance variation across the display while occupying only 9mm² PCB area. | Use Scenario: Integrating flash functionality into miniature camera modules (e.g., 5mm × 5mm) for IoT or wearable devices. IC Role / Device Role / Timing Role: LTC3210EUD-3#PBF operates as the sole power management IC for both MAIN and CAM LEDs, leveraging its 3mm × 3mm QFN package. Use Value: Reduces component count to four capacitors + two resistors, eliminating inductors and simplifying layout - essential for sub-10mm module height constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3210EUD-2#PBF | Includes fourth MAIN LED output (MLED4); otherwise identical pinout, specs, and control interface. | Suitable when four MAIN LEDs are required (e.g., larger displays); not drop-in for 3-LED designs due to NC vs MLED4 pin assignment. | Select LTC3210EUD-2#PBF only if fourth MAIN channel is needed; LTC3210EUD-3#PBF saves cost and routing complexity for 3-LED systems. |
| TPS61165DRVR | Boost converter (inductor-based); 32-level I²C-controlled MAIN current; no CAM channel; 1.8–6.5V input. | Requires external inductor and I²C host; lacks dedicated CAM driver and strobe-only interface; higher EMI profile. | Choose TPS61165DRVR only if I²C system control is preferred and inductor placement is feasible; LTC3210EUD-3#PBF offers simpler, lower-EMI, strobe-driven implementation. |
Compared with LTC3210EUD-2#PBF and TPS61165DRVR, the LTC3210EUD-3#PBF uniquely combines strobe-programmed 32-step MAIN dimming, integrated CAM flash capability, and inductorless operation in a single 3mm × 3mm QFN - making it optimal for space-constrained, low-EMI mobile camera subsystems requiring dual-path LED control.
Availability
LTC3210EUD-3#PBF is available at Aetrix Electronics and suitable for cellphone camera flash modules, portable DSC backlighting, and PDA display illumination requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3210EUD-3#PBF 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, formed through the acquisition of Linear Technology in 2017.
The LTC3210EUD-3#PBF belongs to ADI's legacy Linear Technology LED driver product line, engineered specifically for compact, low-EMI camera lighting in battery-powered portable electronics - emphasizing integration, efficiency, and ease of use in space-constrained designs.
FAQ
What is the maximum CAM LED current supported by the LTC3210EUD-3#PBF?
The LTC3210EUD-3#PBF supports up to 380mA on the CLED output when configured with RC = 24.3kΩ. This full-scale value is set by the internal 3-bit DAC and external RC resistor, with programmable steps down to ~54mA (FS/7). Continuous operation above 300mA is limited by thermal constraints; pulse operation at 380mA is supported under ≤10% duty cycle per datasheet Note 2.
How does the LTC3210EUD-3#PBF switch between 1x, 1.5x, and 2x charge pump modes?
The LTC3210EUD-3#PBF monitors voltage headroom at its MLED and CLED current sources. When dropout is detected - i.e., insufficient voltage across a current source to maintain programmed current - it automatically transitions from 1x to 1.5x mode (~0.4ms delay), then to 2x mode if dropout persists. The CPO voltage is regulated at 4.55V (1.5x) or 5.05V (2x), and the part resets to 1x mode upon shutdown or falling edge of ENC.
Can the LTC3210EUD-3#PBF drive four MAIN LEDs?
No - the LTC3210EUD-3#PBF has only three MAIN LED outputs (MLED1–MLED3) and Pin 7 is NC (no-connect). The four-MLED variant is the LTC3210EUD-2#PBF, which uses Pin 7 as MLED4. Attempting to route a fourth MAIN LED to the NC pin of LTC3210EUD-3#PBF will not function, as that pin is unconnected internally.
What is the purpose of the exposed pad (Pin 17) on the LTC3210EUD-3#PBF?
The exposed pad (Pin 17) on the LTC3210EUD-3#PBF is electrically and thermally connected to GND. It must be soldered to a low-impedance PCB ground plane using multiple vias to ensure proper thermal dissipation (θJA = 68°C/W) and stable electrical reference - failure to do so may cause overheating, regulation instability, or premature thermal shutdown during high-current CAM LED operation.
How is brightness controlled on the MAIN LEDs using the LTC3210EUD-3#PBF?
Brightness on the MAIN LEDs is controlled by strobing the ENM pin: each positive-edge pulse decrements the internal 5-bit down counter, reducing the DAC output and thus the current through MLED1–MLED3. With RM = 30.1kΩ, this provides 32 linear steps from 0mA to 20mA. The new current level takes effect after a 150µs settling delay, and holding ENM high after the final pulse locks the setting.
LTC3210EUD-3#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- 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-3#PBF FAQ
1.How can I place an order for LTC3210EUD-3#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3210EUD-3#PBF 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-3#PBF reliable?
The price and inventory of LTC3210EUD-3#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3210EUD-3#PBF is usually 5 days.
3.What payment methods are accepted for LTC3210EUD-3#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3210EUD-3#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3210EUD-3#PBF?
LTC3210EUD-3#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3210EUD-3#PBF 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-3#PBF?
For technical support, including LTC3210EUD-3#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3210EUD-3#PBF requirements.
6.How does Aetrix verify that LTC3210EUD-3#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3210EUD-3#PBF 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-3#PBF meets industry standards.
7.What is the process for return or replacement of LTC3210EUD-3#PBF?
All LTC3210EUD-3#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3210EUD-3#PBF, 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-3#PBF part is unused and in its original packaging.
Return procedure for LTC3210EUD-3#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3210EUD-3#PBF 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…
