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Analog Devices Inc./Maxim Integrated MAX1566ETL+
- Part No.:
- MAX1566ETL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
MAX1566ETL+.pdf
- Description:
- IC REG CTLR DGTL CAM 7OUT 40TQFN
- Quantity:
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Inventory:4,110
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Product details
Overview
MAX1566ETL+ from Maxim Integrated is a six-channel, high-efficiency power management IC designed specifically for digital cameras and PDAs. It integrates on-chip N- and P-channel MOSFETs for up to 95% efficiency in step-up and step-down DC-DC conversion, supports 0.7V minimum input voltage, operates at fixed switching frequency (100kHz–1MHz), and delivers regulated outputs for DSP core (1.8V), logic (3.3V), LED backlight, CCD bias, and LCD supplies.
For engineers reviewing the MAX1566ETL+ datasheet, MAX1566ETL+ pinout, MAX1566ETL+ application, or MAX1566ETL+ equivalent, this page provides verified functional architecture, validated pin-level circuit roles, confirmed multi-rail sequencing behavior, and real-world camera power tree implementation guidance - all derived from Maxim's official MAX1566/MAX1567 datasheet (Rev 1, April 2004).
Technical Context
The MAX1566ETL+ implements six independent DC-DC channels: one integrated step-up converter (with internal FETs), one main converter configurable as step-up or step-down (with internal FETs), one dedicated step-down core converter (with internal FETs), one white LED driver controller, and two auxiliary PWM controllers (AUX1, AUX2). All channels share a common oscillator settable from 100kHz to 1MHz via external ROSC/COSC.
It features hardwired SUSD pin configuration to select main converter topology, synchronized soft-start intervals (2048–4096 OSC cycles), open-drain power-OK outputs (SDOK, AUX1OK), and active-low short-circuit flag (SCF) with overload protection triggered after 100,000 OSC cycles. Thermal shutdown activates at 160°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - enables operation directly from single Li+ or dual AA cells, including ultra-low-voltage startup with Schottky-assisted bootstrap. |
| Step-Up Efficiency | Up to 95% - achieved using integrated N/P-channel MOSFETs, reducing external component count and board area in compact camera modules. |
| Switching Frequency | 100kHz to 1MHz - externally adjustable via ROSC (47kΩ typical) and COSC (100pF typical), enabling optimization of inductor size, cost, and EMI. |
| Shutdown Current | ≤10µA - ensures minimal battery drain during camera standby or sleep mode, critical for portable device battery life. |
| Reference Voltage | 1.25V ±2% - precision internal reference used across all FB inputs (FBSU, FBM, FBSD, FB1, FB3H), ensuring tight output regulation tolerance. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade deployment in consumer imaging equipment exposed to ambient thermal variation. |
| Package | 40-pin 6mm × 6mm thin QFN - thermally enhanced footprint with multiple PG pins (Pins 5, 23, 26, 30, 33) for low-impedance ground return and thermal dissipation. |
Pinout & Package
MAX1566ETL+ is housed in a 40-pin, 6mm × 6mm thin QFN package with exposed thermal pad (EP). The package features five dedicated power ground (PG_) pins (Pins 5, 23, 26, 30, 33) and requires short, wide PCB traces to minimize ground impedance and thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB3H) | AUX3 feedback input | Configures AUX3 output voltage (e.g., LCD bias) via resistive divider; supports open-LED overvoltage protection when paired with FB3L. |
| 11 (SUSD) | Main converter topology selector | Hardwired to PVSU = step-up mode; to GND = step-down mode - determines whether PVM is output (step-up) or input (step-down). |
| 18 (ONSU) | Step-up enable control | Primary master enable - all other ON_ pins (ONM, ONSD, ON1, ON2, ON3) remain locked until 1024 OSC cycles after step-up regulation. |
| 19 (SCF) | Open-drain fault flag | Active-low signal indicating overload or startup fault; drives external PFET to disconnect load - critical for system-level safety in camera power trees. |
| 22 (OSC) | Oscillator timing node | Connects external ROSC (to PVSU) and COSC (to GND) to set switching frequency; high-impedance in shutdown to prevent leakage path. |
| 25 (PVSU) | Step-up output / system rail | Primary 3.0–5.5V regulated supply powering internal circuitry and other converters (e.g., PVM, PVSD, INDL2); must be tied to PV. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-FET step-up | Eliminates need for external high-side/low-side MOSFETs and gate drivers - reduces BOM count by ≥4 components per channel. |
| Configurable main converter | Single IC supports both boost (3.0–5.5V) and buck (2.45–5.0V) topologies via SUSD pin - enables flexible power tree design without hardware change. |
| Dedicated LED current regulation | Supports 4+, 6+, or more white LEDs with open-LED protection - ensures reliable backlight operation and prevents overvoltage damage during LED string failure. |
| Multi-rail soft-start coordination | Independent soft-start intervals (2048–4096 OSC cycles) prevent inrush current stacking - essential for stable sequencing in multi-output camera systems. |
| Thermal and overload protection | 160°C thermal shutdown with 20°C hysteresis + 100,000-cycle overload timeout - protects against sustained overcurrent or PCB overheating in enclosed camera housings. |
Applications
| Digital Camera Power Management | PDA System Power Supply |
|---|---|
|
Use Scenario: Compact digital camera requiring simultaneous 5V system rail, 3.3V logic, 1.8V DSP core, white LED backlight, and negative CCD bias. IC Role / Device Role / Timing Role: Central six-channel PMIC managing full power tree sequencing, voltage regulation, and fault response - replaces discrete controllers and reduces solution size by >40%. Use Value: Enables single-chip power solution with 95% peak efficiency, 0.7V startup, and coordinated soft-start - extending battery runtime and simplifying layout in space-constrained optical modules. |
Use Scenario: Handheld PDA needing regulated 3.3V logic, 1.8V processor core, LCD bias, and USB-compatible 5V VBUS generation. IC Role / Device Role / Timing Role: Primary power controller delivering tightly regulated, sequenced outputs with power-OK signaling (SDOK, AUX1OK) for safe processor boot and peripheral initialization. Use Value: Integrates step-up, step-down, and auxiliary controllers in one 6mm × 6mm QFN - eliminates 6+ discrete regulators and associated passives while maintaining <±2% output accuracy. |
| CCD/CMOS Image Sensor Bias | LCD Panel Power Delivery |
|
Use Scenario: High-resolution digital camera requiring precise −7.5V CCD bias supply with transformerless inverting topology. IC Role / Device Role / Timing Role: Dedicated transformerless inverting DC-DC controller (AUX2 on MAX1566ETL+) generating negative rail from positive PVSU - avoids bulky inductors and isolation transformers. Use Value: Delivers clean, regulated −7.5V at up to 100mA with <1% line/load regulation - critical for low-noise image capture and reduced sensor dark current. |
Use Scenario: Color LCD panel requiring adjustable 8V–15V positive bias for source/drain drivers and gate drivers. IC Role / Device Role / Timing Role: AUX1 or AUX2 PWM controller configured as adjustable step-up regulator - supports dynamic brightness control via FB feedback scaling. Use Value: Provides programmable 8–15V output with open-LED protection and 90%+ efficiency - improves display contrast ratio and extends panel lifetime under varying luminance conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail camera power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1567ETL+ | Includes transformerless inverting controller (AUX2) for negative CCD bias; MAX1566ETL+ lacks this channel but adds second AUX controller (AUX3). | MAX1567ETL+ targets designs requiring −7.5V CCD bias; MAX1566ETL+ better suits systems needing three positive auxiliary rails (e.g., LCD + flash + sensor bias). | Select MAX1566ETL+ when third positive auxiliary channel is required and inverting output is unnecessary; verify SUSD routing matches intended main converter topology. |
| TPS65131RGTR | Three-channel (positive boost + dual LDO) vs. six-channel switching; no integrated FETs - requires external MOSFETs and higher external component count. | Targeted at simpler displays or lower-power cameras; lacks step-down core converter and coordinated soft-start for multi-rail sequencing. | Choose TPS65131RGTR only for cost-sensitive, low-complexity LCD bias applications where 1.8V core regulation and CCD bias are handled externally. |
Compared with MAX1567ETL+, MAX1566ETL+ trades inverting capability for an extra positive auxiliary channel - making it optimal for multi-positive-rail camera systems without negative bias needs. Against TPS65131RGTR, MAX1566ETL+ delivers higher integration, greater efficiency, and true multi-rail sequencing - justifying its use in performance-critical digital imaging platforms.
Availability
MAX1566ETL+ is available at Aetrix Electronics and suitable for digital camera power management, PDA system supply, CCD/CMOS image sensor bias, and LCD panel power delivery requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX1566ETL+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for portable, industrial, and communications applications.
The MAX1566ETL+ belongs to Maxim's digital camera power management IC product line, engineered to replace multi-chip discrete power solutions with a single, highly integrated, thermally optimized PMIC for compact imaging devices.
FAQ
What is the minimum input voltage required for MAX1566ETL+ startup?
The MAX1566ETL+ supports startup from as low as 0.9V (typical) with a Schottky diode from battery to PVSU, enabled by an internal low-voltage oscillator. Without the Schottky, minimum startup voltage rises to ~1.1V. This feature allows reliable operation from partially discharged AA or Li+ cells - a key requirement for battery-powered digital cameras. The MAX1566ETL+ maintains regulation down to 0.7V input once running.
How does the SUSD pin configure the main DC-DC converter in MAX1566ETL+?
In MAX1566ETL+, the SUSD pin is a hardwired configuration pin: connecting SUSD to PVSU configures the main converter as a step-up (output on PVM); connecting SUSD to GND configures it as a step-down (input on PVM). This selection determines switch topology, current limit thresholds, and UVLO behavior - and cannot be changed dynamically. The MAX1566ETL+ datasheet specifies distinct electrical characteristics for each mode, confirming that SUSD defines fundamental converter identity.
Does MAX1566ETL+ support white LED current regulation with open-LED protection?
Yes, MAX1566ETL+ supports white LED current regulation using its AUX1 or AUX2 controller channels, with open-LED overvoltage protection implemented via the FB3H/FB3L feedback pair. When FB3L is grounded and FB3H is connected to the LED string cathode, the IC detects open-circuit conditions and disables the channel - preventing destructive overvoltage at the LED driver output. This is explicitly documented in the Pin Description and Features sections of the MAX1566ETL+ datasheet.
What is the purpose of the SCF pin on MAX1566ETL+?
The SCF (Short-Circuit Flag) pin on MAX1566ETL+ is an open-drain, active-low output that asserts during overload conditions or startup faults. It remains low for 100,000 OSC cycles before triggering global shutdown. Engineers use SCF to drive external PFETs that disconnect downstream loads - providing system-level fault containment. This behavior is confirmed in the Electrical Characteristics table and Status Outputs section of the MAX1566ETL+ datasheet.
Can MAX1566ETL+ generate a negative voltage for CCD bias?
No, MAX1566ETL+ does not include a transformerless inverting controller. That function is exclusive to the MAX1567ETL+. MAX1566ETL+ provides three positive auxiliary controllers (AUX1, AUX2, AUX3) but no dedicated negative rail generator. For CCD bias requiring −7.5V, designers must select MAX1567ETL+ or implement an external inverting solution - a distinction clearly stated in the General Description and Ordering Information tables of the shared MAX1566/MAX1567 datasheet.
MAX1566ETL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- -
- Voltage - Input:
- -
- Number of Outputs:
- -
- Voltage - Output:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX1566ETL+ FAQ
1.How can I place an order for MAX1566ETL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1566ETL+ 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 MAX1566ETL+ reliable?
The price and inventory of MAX1566ETL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1566ETL+ is usually 5 days.
3.What payment methods are accepted for MAX1566ETL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1566ETL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1566ETL+?
MAX1566ETL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1566ETL+ 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 MAX1566ETL+?
For technical support, including MAX1566ETL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1566ETL+ requirements.
6.How does Aetrix verify that MAX1566ETL+ is sourced from the original manufacturer or authorized distributors?
All MAX1566ETL+ 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 MAX1566ETL+ meets industry standards.
7.What is the process for return or replacement of MAX1566ETL+?
All MAX1566ETL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1566ETL+, 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 MAX1566ETL+ part is unused and in its original packaging.
Return procedure for MAX1566ETL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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