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Analog Devices Inc. LTC3219EUD#TRPBF
- Part No.:
- LTC3219EUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC3219EUD#TRPBF.pdf
- Description:
- IC LED DRVR RGLTR I2C 28MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,892
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Product details
Overview
LTC3219EUD#TRPBF from Analog Devices (formerly Linear Technology) is a 250mA multimode charge pump LED driver IC with nine universal 28mA current sources, 6-bit linear DAC brightness control per channel, I²C interface, and automatic 1x/1.5x/2x mode switching-designed for QVGA+ display backlighting in video phones and portable multimedia devices.
For engineers reviewing the LTC3219EUD#TRPBF datasheet, LTC3219EUD#TRPBF pinout, LTC3219EUD#TRPBF application, or LTC3219EUD#TRPBF equivalent, this page delivers verified electrical parameters, validated package mapping to 3mm × 3mm 20-lead QFN, confirmed I²C register-level control behavior, and real-world dimming/gradation/blink timing values per REG11 configuration.
Technical Context
The LTC3219EUD#TRPBF integrates a slew-limited, 850kHz switched-capacitor charge pump with three operating modes (1x direct pass-through, 1.5x boost, 2x boost), dynamically selected based on dropout detection at any ULED pin with ≥400μs hysteresis. Each of the nine current sources features independent 64-step linear DAC control, blink (1.25s/2.5s period), and gradation (0.24s/0.48s/0.96s ramp time) via I²C sub-addressed registers.
It supports asynchronous enable/disable via ENU pin with pre-programmed output selection, internal 1.22V reference, soft-start limiting inrush current during mode transitions, and short-circuit/thermal protection. DVCC (1.5V–5.5V) sets logic level and resets registers on UVLO (<1V), while VBAT (2.9V–5.5V) powers the charge pump and analog circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Total Output Current | 250mA - sum of all nine ULED channels; enables multi-display support (e.g., main + sub + RGB) |
| Per-Channel LED Current Range | 0–28mA in 64 linear steps - precise brightness tuning without external resistors |
| Charge Pump Modes | 1x / 1.5x / 2x - auto-switched on dropout; CPO regulated to 3.6V/4.53V/5.04V respectively at 20mA load |
| I²C Interface Speed | Up to 400kHz - compatible with standard Fast-mode I²C controllers; includes glitch filtering and ACK handshake |
| Gradation Ramp Times | 0.24s / 0.48s / 0.96s - programmable per channel via REG11 D1–D2; enables smooth visual transitions |
| Blink Period & On-Time | 1.25s/2.5s period with 0.156s/0.625s on-time - hardware-timed, freeing MCU resources |
| Package | 20-lead 3mm × 3mm QFN (UD) - exposed pad (Pin 21) must be soldered to GND for thermal and electrical integrity |
Pinout & Package
Package: 20-lead (3mm × 3mm) plastic QFN with exposed thermal pad (Pin 21 = GND). Requires soldering exposed pad to PCB ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPO (1) | Charge pump output | Supplies regulated voltage (1x/1.5x/2x VBAT) to all ULED channels; requires 2.2μF ceramic capacitor to GND |
| ULED1–ULED9 (2–6, 11–14) | Universal current source outputs | Each delivers 0–28mA with 6-bit DAC control; configurable as open-drain GPOs when Bit 6/7 = 1 |
| DVCC (7) | Digital supply rail | Sets logic reference (1.5V–5.5V); resets registers on UVLO (<1V); bypass with 0.1μF ceramic |
| SCL (8), SDA (9) | I²C serial interface | Standard 2-wire bus (7-bit address 0x36); SDA pull-up required; supports quick-write to all ULED registers |
| ENU (10) | Asynchronous enable input | Toggles pre-selected ULEDs on/off without I²C traffic; resets charge pump to 1x mode on falling edge |
| GND (15, 21) | System ground | Pin 15 and exposed pad (Pin 21) must both connect to PCB ground plane for thermal dissipation and noise control |
| C1P/C1M/C2P/C2M (16–17, 19–20) | Flying capacitor terminals | Connect two 1μF X5R/X7R ceramics (C1P–C1M, C2P–C2M); slew-limited for EMI reduction |
| VBAT (18) | Main power input | 2.9V–5.5V analog supply; powers charge pump and internal circuitry; bypass with 2.2μF low-ESR ceramic |
Key Features
| Feature | Design Value |
|---|---|
| Multimode charge pump with auto dropout detection | Switches between 1x/1.5x/2x modes only when ≥400μs sustained dropout occurs-prevents false triggering during LED warm-up |
| Slew-limited flying capacitor switching | Reduces conducted/radiated EMI without external filters; meets Class B emission limits in compact layouts |
| Independent per-channel control | Each ULED supports simultaneous blink, gradation, and brightness adjustment via dedicated I²C registers (REG1–REG9) |
| Configurable ENU pin operation | Enables hardware-triggered display activation (e.g., incoming call alert) without waking host MCU or reconfiguring I²C |
| Internal soft-start and protection | Linear 125μs current ramp during mode transitions; integrated thermal shutdown and short-circuit protection prevent latch-up |
Applications
| Video Phone Main Display | Video Phone Sub Display |
|---|---|
Use Scenario: Driving 4-LED backlight for QVGA main LCD in battery-powered video phones. IC Role / Device Role / Timing Role: Provides regulated current to each LED string via ULED1–ULED4; manages brightness via 6-bit DAC and responds to I²C commands from baseband processor. Use Value: Achieves >91% efficiency at 3.6V input and 15mA/LED (VF=3.2V), extending talk time by minimizing VBAT current draw in 1x mode. |
Use Scenario: Powering 2-LED auxiliary display for caller ID or status indication. IC Role / Device Role / Timing Role: Controls ULED5–ULED6 independently; uses ENU pin for instant on/off during call events without I²C overhead. Use Value: Enables zero-latency display wake-up and eliminates MCU polling-reducing system power by 12μA average during standby. |
| RGB Indicator Panel | Portable Media Player UI |
Use Scenario: Driving red/green/blue LEDs for status feedback in handheld devices. IC Role / Device Role / Timing Role: Uses ULED7–ULED9 as individually dimmable channels; applies gradation (0.48s ramp) for smooth color transitions. Use Value: Eliminates need for external PWM generators or op-amp current sinks-reducing BOM count by 3 ICs and 9 passive components. |
Use Scenario: Backlighting segmented OLED or TFT UI elements in media players. IC Role / Device Role / Timing Role: Configures all nine ULEDs for uniform brightness scaling; leverages quick-write (REG0 Bit 1) to update all channels simultaneously. Use Value: Synchronizes brightness changes across multiple zones with <100ns skew-critical for flicker-free scrolling interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832AETG+ | 4-channel, 120mA total; no gradation or blink; uses analog/digital dimming only | Suitable for simpler monochrome displays without animation requirements | Select when cost sensitivity outweighs feature count and multi-display flexibility |
| TPS61165DRVR | Single-output, 40mA; fixed 1.4MHz boost converter; no I²C or multi-channel control | Targeted at single-string LED applications like keypad backlighting | Choose for space-constrained designs where only one LED string is needed and firmware simplicity is prioritized |
Compared with MAX16832AETG+ and TPS61165DRVR, the LTC3219EUD#TRPBF uniquely delivers nine independent current sources with synchronized gradation, blink, and I²C register control in a single 3mm × 3mm QFN-enabling complex multimode displays without external timing or sequencing logic.
Availability
LTC3219EUD#TRPBF is available at Aetrix Electronics and suitable for video phone displays, portable media player UIs, RGB status indicators, and QVGA+ multimode backlight systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC3219EUD#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, serving industrial, automotive, communications, and consumer markets.
The LTC3219EUD#TRPBF belongs to ADI's precision LED driver product line, engineered specifically for low-noise, high-efficiency multimode backlighting in portable multimedia devices with stringent EMI and battery-life requirements.
FAQ
What is the maximum total output current supported by the LTC3219EUD#TRPBF?
The LTC3219EUD#TRPBF supports up to 250mA total output current across its nine ULED channels. This is the sum of all enabled current sources-each rated for 0–28mA-and enables driving multiple display segments (e.g., 4-main + 2-sub + 3-RGB) simultaneously without external current amplification. The device maintains regulation and efficiency within specification up to this limit under thermal design guidelines.
How does the LTC3219EUD#TRPBF handle charge pump mode transitions?
The LTC3219EUD#TRPBF automatically switches between 1x, 1.5x, and 2x charge pump modes based on dropout detection at any active ULED pin, with ≥400μs confirmation delay to avoid false triggers during LED forward-voltage stabilization. Mode resets to 1x occur on I²C register updates, ENU falling edge, gradation completion, or blink period end-ensuring predictable behavior during dynamic lighting sequences.
Can the ULED pins of the LTC3219EUD#TRPBF be used for general-purpose outputs?
Yes-the ULED1–ULED9 pins of the LTC3219EUD#TRPBF can operate as I²C-controlled open-drain general-purpose outputs (GPOs) by setting Bits 6 and 7 of their respective REG1–REG9 registers to logic high. In GPO mode, dropout detection is disabled, eliminating unintended charge pump mode changes during low-voltage swings, and enabling flexible signal routing beyond LED driving.
What is the function of the ENU pin on the LTC3219EUD#TRPBF?
The ENU pin on the LTC3219EUD#TRPBF provides hardware-based asynchronous enable/disable control for pre-configured ULED outputs-allowing immediate display activation (e.g., for incoming calls) without I²C communication. When toggled high, it illuminates selected LEDs; when pulled low with no other outputs active, it places the LTC3219EUD#TRPBF into shutdown with 3.2μA VBAT quiescent current.
Does the LTC3219EUD#TRPBF support simultaneous gradation and blinking on the same ULED channel?
Yes-the LTC3219EUD#TRPBF supports concurrent gradation and blinking on any ULED channel. Blinking (controlled via REG11 D3–D4) defines on/off periods, while gradation (controlled via REG11 D1–D2 and REG0 UP bit) governs ramp timing-both operate independently and are applied to the same current-source output. This enables effects like pulsing fade-in/fade-out without MCU intervention.
LTC3219EUD#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:
- 9
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 28mA
- Frequency:
- 850kHz
- Dimming:
- I2C
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
LTC3219EUD#TRPBF FAQ
1.How can I place an order for LTC3219EUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3219EUD#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 LTC3219EUD#TRPBF reliable?
The price and inventory of LTC3219EUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3219EUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3219EUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3219EUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3219EUD#TRPBF?
LTC3219EUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3219EUD#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 LTC3219EUD#TRPBF?
For technical support, including LTC3219EUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3219EUD#TRPBF requirements.
6.How does Aetrix verify that LTC3219EUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3219EUD#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 LTC3219EUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3219EUD#TRPBF?
All LTC3219EUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3219EUD#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 LTC3219EUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3219EUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3219EUD#TRPBF Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR421UE6327HTSA1
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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