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Analog Devices Inc. LTC3207EUF-1#PBF
- Part No.:
- LTC3207EUF-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3207EUF-1#PBF.pdf
- Description:
- IC LED DRV RGLTR ANALOG 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:187
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Product details
Overview
LTC3207EUF-1#PBF from Analog Devices (formerly Linear Technology) is a highly integrated multi-output LED/CAM driver IC featuring a low-noise, multi-mode charge pump and twelve 28mA universal current sources with 6-bit linear DACs plus one 425mA camera LED current source with 4-bit DAC and 2-second safety timer. It operates from 2.9V to 5.5V VBAT, supports I²C control at up to 400kHz, and delivers up to 600mA total output current in a 4mm × 4mm 24-pin QFN package. It is designed for mobile video phone displays with QVGA+ resolution requiring independent brightness, blink, and gradation control.
For engineers reviewing the LTC3207EUF-1#PBF datasheet, LTC3207EUF-1#PBF pinout, LTC3207EUF-1#PBF application, or LTC3207EUF-1#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency behavior across 1x/1.5x/2x charge pump modes, real-world dropout voltage specs (180mV ULED, 450mV CAM), and precise I²C address (00110100) - all critical for display power architecture validation and firmware register mapping.
Technical Context
The LTC3207EUF-1#PBF implements an auto-switching switched-capacitor charge pump with three discrete operating modes: 1x (direct VBAT-to-CPO), 1.5x (VBAT×1.5, up to 4.55V), and 2x (VBAT×2, up to 5.05V), triggered by LED current source dropout detection with ~400µs hysteresis. Mode reset occurs on I²C register write, ENU/CAMHL falling edge, or gradation completion.
It integrates twelve independent 6-bit linear DAC-controlled universal current sources (ULED1–ULED12, 0–27.5mA, 64-step), one 4-bit CAM current source (0–425mA, 16-step), slew-limited flying capacitor switching (C1P/C1M/C2P/C2M), and dual I²C address support (00110100 for LTC3207EUF-1#PBF). All digital I/O is referenced to DVCC (1.5–5.5V), and the exposed thermal pad (Pin 25) must be soldered to PCB ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBAT Operating Voltage | 2.9V to 5.5V - defines minimum battery voltage for full functionality and maximum input for safe operation without external regulation. |
| Total Output Current | Up to 600mA pulsed (10% duty cycle) - enables simultaneous drive of 4-main + 2-sub + dual RGB + camera LEDs in compact handheld devices. |
| Universal LED Current Accuracy | ±2% matching between any two outputs at 50% full scale - ensures uniform brightness across multi-segment displays without per-channel calibration. |
| CAM LED Dropout Voltage | 450mV at full-scale 425mA - determines minimum headroom required between CPO and CAM LED forward voltage for stable high-current flash operation. |
| I²C Address | 00110100 (0x34) - unique slave address enabling coexistence with LTC3207 (0x36) on same bus for dual-display systems. |
| Charge Pump Efficiency | Up to 91% - reduces thermal load and extends battery life in space-constrained portable applications. |
| Operating Temperature Range | –40°C to +85°C - qualified for industrial and consumer mobile equipment environments without derating. |
Pinout & Package
Package: 24-pin (4mm × 4mm) plastic QFN with exposed thermal pad (Pin 25 = GND), lead-free finish, –40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPO (Pin 1) | Charge pump output | Primary power rail for all LED current sources; requires 4.7µF ceramic capacitor to GND; voltage scales as 1x/1.5x/2x VBAT. |
| ULED1–ULED12 (Pins 2–6, 12–18) | Universal LED current sinks | Twelve independent 27.5mA current sources with 6-bit DAC control; also configurable as I²C-controlled open-drain GPOs. |
| CAM (Pin 7) | Camera LED current sink | Single 425mA current source with 4-bit DAC and hardware-safety timer; toggled between high/low registers via CAMHL pin. |
| CAMHL (Pin 8) | Camera register select | High = CAM high-current register (flash mode); low = CAM low-current register; falling edge resets charge pump to 1x mode. |
| DVCC (Pin 9) | Digital supply reference | Sets logic threshold for SCL/SDA/ENU/CAMHL; UVLO at 1V; 0.1µF bypass required; used for hardware reset when pulled below threshold. |
| SCL/SDA (Pins 10/11) | I²C interface | Standard 2-wire serial bus (up to 400kHz); DVCC-referenced; supports ACK/NACK; no internal pull-ups - external required. |
| C1P/C1M/C2P/C2M (Pins 19–20, 23–24) | Flying capacitor connections | Four terminals for two 2.2µF ceramic flying caps; slew-limited switching minimizes EMI; critical for charge pump stability and ripple. |
| VBAT (Pin 21) | Main power input | Supplies entire IC including charge pump; 2.2µF low-ESR ceramic bypass required; shutdown current ≤7µA at 3.2V. |
| ENU (Pin 22) | Asynchronous enable | Hardware toggle for preselected ULED outputs; rising edge enables, falling edge disables and resets charge pump to 1x if no other outputs active. |
| GND (Pin 25, Exposed Pad) | Power and thermal ground | Must be soldered to PCB ground plane; serves as primary thermal path and reference for all current sources and regulators. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-mode charge pump (1x/1.5x/2x) | Automatically optimizes efficiency and noise: 1x for lowest EMI when headroom sufficient; 1.5x/2x engaged only upon dropout detection - avoids unnecessary switching loss. |
| Independent 64-step ULED dimming | Each of 12 ULED channels supports linear brightness control via dedicated 6-bit DAC register - enables pixel-level grayscale rendering in segmented displays. |
| Hardware-safety timer for CAM flash | 2-second automatic disable of high-current CAM mode prevents thermal damage during sustained flash use - activated only when CAMHL = high. |
| Slew-limited flying capacitor switching | 5–10ns edge rates on C1P/C1M/C2P/C2M pins reduce conducted/radiated EMI - critical for passing FCC/CE emissions in handheld RF-sensitive designs. |
| Configurable ENU pin control | Enables microcontroller-free LED activation (e.g., incoming call indicator) with zero firmware latency - ENU rising edge illuminates preprogrammed ULEDs instantly. |
Applications
| Mobile Video Phone Display | QVGA+ Camera Flash |
|---|---|
|
Use Scenario: Driving 4-main + 2-sub + dual RGB LED backlights in compact video phones with dynamic UI lighting. IC Role / Device Role / Timing Role: Universal LED driver providing independent 6-bit brightness control, blink (1.25/2.5s period), and gradation (0.24/0.48/0.96s ramp) per channel via I²C. Use Value: Eliminates need for 12 discrete LED drivers and external PWM controllers - reduces BOM count and PCB area while enabling smooth UI transitions. |
Use Scenario: High-intensity white LED flash for smartphone front/rear cameras with thermal safety compliance. IC Role / Device Role / Timing Role: Dedicated CAM current source delivering up to 425mA with 4-bit linear control and hardware-enforced 2-second timeout. Use Value: Prevents LED overheating and battery sag during flash bursts - eliminates firmware watchdog implementation and ensures consistent flash duration. |
| RGB Status Indicator Panel | Industrial Handheld HMI |
|
Use Scenario: Multi-color status lighting on medical or test equipment with color-mixing capability. IC Role / Device Role / Timing Role: Dual RGB channel support (6 ULEDs per RGB set) with synchronized gradation and independent blink control per LED. Use Value: Enables precise hue/saturation tuning via current ratio control - achieves >16M color combinations without external RGB mixing optics. |
Use Scenario: Ruggedized portable HMIs requiring reliable LED backlighting under wide temperature (-40°C to +85°C) and variable battery conditions. IC Role / Device Role / Timing Role: Auto-adaptive charge pump maintaining stable CPO voltage across 2.9–5.5V VBAT range and varying LED VF drift. Use Value: Ensures consistent display brightness over full battery discharge curve and ambient temperature - no firmware compensation needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS31FL3729-QFLS4-TR | 18-channel 40mA LED driver with PWM-only dimming (no linear DAC); uses SPI interface; no integrated charge pump - requires external 5V rail. | Requires external boost converter and microcontroller with SPI; better suited for fixed-voltage systems with high PWM frequency needs (>1kHz). | Select when system already has stable 5V supply and prioritizes PWM flicker elimination over analog dimming linearity. |
| TPS61165DRVR | Single-output 400mA white LED driver with 1.2MHz boost converter; no multi-channel control; I²C interface limited to ON/OFF and 8-step brightness. | Designed for single-flash LED applications only; lacks ULED/CAM segmentation, gradation, or independent channel control. | Select only for cost-sensitive single-LED flash designs where multi-channel features are unnecessary. |
Compared with IS31FL3729-QFLS4-TR and TPS61165DRVR, the LTC3207EUF-1#PBF uniquely integrates charge pump, 12+1 independent linear DACs, hardware safety timer, and ENU pin - making it the only solution that simultaneously satisfies QVGA+ display backlighting, camera flash, and asynchronous UI signaling in a single 4mm × 4mm package.
Availability
LTC3207EUF-1#PBF is available at Aetrix Electronics and suitable for mobile video phone displays, QVGA+ camera flash modules, RGB status indicator panels, and industrial handheld HMI systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3207EUF-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and consumer markets.
The LTC3207EUF-1#PBF belongs to Linear's precision LED driver product line, engineered specifically for space-constrained portable electronics requiring multi-channel, high-efficiency, low-EMI display and flash illumination with minimal external components.
FAQ
What is the I²C address of the LTC3207EUF-1#PBF?
The LTC3207EUF-1#PBF uses the fixed 7-bit I²C slave address 00110100 (0x34). This distinguishes it from the pin-compatible LTC3207EUF#PBF (0x36), allowing both variants to coexist on the same I²C bus for dual-display systems. No address configuration is required - the address is hardwired internally and verified in the Electrical Characteristics table of the official datasheet.
How does the LTC3207EUF-1#PBF handle camera flash safety?
The LTC3207EUF-1#PBF implements a hardware-based 2-second safety timer that automatically disables the CAM current source when operating in high-current mode (selected via CAMHL = high). The timer resets only when CAMHL is driven low or the CAM register is written to zero - ensuring fail-safe thermal protection without firmware intervention. This behavior is confirmed in the "CAM Current Source" section and Figure 14 of the datasheet.
Can the ULED outputs of the LTC3207EUF-1#PBF be used as general-purpose open-drain outputs?
Yes - ULED1 through ULED12 can be configured as I²C-controlled open-drain general-purpose outputs (GPOs) by setting Bits 6 and 7 of their respective REG1–REG12 registers to logic 1. In GPO mode, dropout detection is disabled, and outputs swing to ground when enabled. This dual-role capability is explicitly documented in the "PIN FUNCTIONS" and "OPERATION" sections of the datasheet.
What is the minimum dropout voltage for the ULED current sources in the LTC3207EUF-1#PBF?
The ULED current sources exhibit a typical dropout voltage of 180mV at full-scale 27.5mA output, as specified in the Electrical Characteristics table under "LED Dropout Voltage". This value defines the minimum voltage difference required between CPO and the ULED anode to maintain regulation - critical for calculating maximum supported LED forward voltage at given VBAT and charge pump mode.
Does the LTC3207EUF-1#PBF require external flying capacitors, and what values are recommended?
Yes - the LTC3207EUF-1#PBF requires two 2.2µF X5R or X7R ceramic flying capacitors: one between C1P (Pin 24) and C1M (Pin 23), and another between C2P (Pin 20) and C2M (Pin 19). These values are specified in the "PIN FUNCTIONS" section and confirmed in the Typical Application schematic. Using lower capacitance or non-ceramic types degrades charge pump efficiency and increases ripple.
LTC3207EUF-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 13
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 50mA, 425mA
- Frequency:
- 850kHz
- Dimming:
- Analog
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
LTC3207EUF-1#PBF FAQ
1.How can I place an order for LTC3207EUF-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3207EUF-1#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 LTC3207EUF-1#PBF reliable?
The price and inventory of LTC3207EUF-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3207EUF-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3207EUF-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3207EUF-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3207EUF-1#PBF?
LTC3207EUF-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3207EUF-1#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 LTC3207EUF-1#PBF?
For technical support, including LTC3207EUF-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3207EUF-1#PBF requirements.
6.How does Aetrix verify that LTC3207EUF-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3207EUF-1#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 LTC3207EUF-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3207EUF-1#PBF?
All LTC3207EUF-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3207EUF-1#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 LTC3207EUF-1#PBF part is unused and in its original packaging.
Return procedure for LTC3207EUF-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3207EUF-1#PBF Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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