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Analog Devices Inc./Maxim Integrated MAX1566ETL
- Part No.:
- MAX1566ETL
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
MAX1566ETL.pdf
- Description:
- 6-CH DIG CAMERA POWER SUPPLIES
- Quantity:
- Payment:
- Shipping:
Inventory:5,254
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Product details
Overview
MAX1566ETL from Maxim Integrated is a six-channel, high-efficiency power management IC designed specifically for digital camera systems. It integrates on-chip N- and P-channel MOSFETs for step-up (95% efficient), main configurable (step-up/step-down), and core step-down converters, plus three auxiliary PWM controllers - all operating at up to 1MHz. It supports Li+ or 2-cell AA input (0.7V min startup) and delivers regulated outputs for CCD bias, LCD, white LEDs, and DSP core in compact 40-pin thin QFN.
For engineers reviewing the MAX1566ETL datasheet, MAX1566ETL pinout, MAX1566ETL application, or MAX1566ETL equivalent, this device requires attention to SUSD pin configuration (hardwired step-up/step-down mode), thermal shutdown threshold (160°C), soft-start timing (2048–4096 OSC cycles), and its dual-role main converter's current-limit asymmetry (2.4A step-up vs. 0.95A step-down).
Technical Context
The MAX1566ETL implements six independent DC-DC channels: a primary step-up with integrated FETs (0.7V startup, 3.0–5.5V output), a main converter configurable via SUSD pin (step-up: 3–5.5V; step-down: 2.45–5.0V), a dedicated core step-down (1.25–5.0V), and three auxiliary controllers - two for general-purpose loads (FB1/FB2) and one for dual-feedback LED drive (FB3H/FB3L). All channels share a programmable 100kHz–1MHz oscillator.
Its control architecture features per-channel soft-start (2048–4096 OSC cycles), open-drain power-OK outputs (SDOK, AUX1OK), active-low short-circuit flag (SCF), and thermal shutdown with 20°C hysteresis. The device powers entirely from its own step-up output (PVSU), requiring an external Schottky diode for sub-0.9V battery startup - a critical design dependency confirmed across startup waveforms and absolute ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - enables operation directly from single Li+ or two AA cells, including cold-start from depleted batteries. |
| Step-Up Efficiency | Up to 95% - reduces thermal load and extends battery life in high-current camera flash or sensor bias rails. |
| Switching Frequency | 100kHz to 1MHz - allows optimization of inductor size and EMI filtering; set via ROSC/COSC on OSC pin. |
| Shutdown Current | ≤10µA - preserves battery charge during camera standby or sleep modes. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design in sealed camera modules. |
| Main Converter Flexibility | Configurable step-up or step-down via hardwired SUSD pin - eliminates need for separate buck/boost ICs in space-constrained designs. |
| LED Drive Capability | Regulates current for ≥4 white LEDs with open-LED overvoltage protection - ensures safe, consistent illumination without external current-sense resistors. |
Pinout & Package
MAX1566ETL is housed in a 6mm × 6mm, 40-pin thin QFN package with exposed thermal pad (pin 40 = GND). All PG_ pins (5, 23, 26, 39, 40) must be connected to a low-impedance ground plane using short, wide traces for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB3H) | AUX3 feedback input | 1.25V threshold; enables dual-mode LED regulation (voltage feedback or open-LED protection when paired with FB3L). |
| 11 (SUSD) | Main converter mode select | Hardwired to PVSU (step-up) or GND (step-down); dynamic reconfiguration is prohibited and causes undefined behavior. |
| 18 (ONSU) | Step-up enable | Primary master enable; all other ON_ pins remain locked until 1024 OSC cycles after step-up reaches regulation. |
| 19 (SCF) | Overload fault flag | Open-drain active-low signal asserting during short-circuit, overload, or startup - used to gate external PFETs for load isolation. |
| 22 (OSC) | Oscillator timing node | Connects to ROSC (to PVSU) and COSC (to GND); sets switching frequency between 100kHz–1MHz with ±10% tolerance. |
| 25 (PVSU) | Step-up output & system supply rail | Primary power source for internal circuitry and other channels; must be tied to PV and bypassed with ≥1µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N/P-channel FETs | Eliminates 12 external MOSFETs and drivers - reduces BOM count, layout area, and gate-drive loop inductance for stable high-frequency operation. |
| Configurable main converter | Single IC supports both boost-buck (SU + MAIN) and buck-only topologies - simplifies variant management for multi-platform camera designs. |
| Dual-feedback LED controller | FB3H/FB3L inputs provide true constant-current regulation with automatic open-LED detection - prevents overvoltage damage to LED strings during failure. |
| Per-channel soft-start | Programmable 2048–4096 OSC-cycle ramp (e.g., ~4ms at 1MHz) prevents inrush current and voltage droop on shared rails like PVSU. |
| Thermal and overload protection | Independent shutdown triggers (160°C junction, 100,000 OSC-cycle overload timeout) ensure robust field reliability without external supervision circuits. |
Applications
| Digital Camera Power Management | Portable Imaging Device Supply |
|---|---|
Use Scenario: Powering image sensor, flash LED array, CCD bias, and LCD backlight from a single Li+ cell in ultra-thin point-and-shoot cameras. IC Role / Device Role / Timing Role: Central PMIC managing six synchronized, sequenced power rails with coordinated soft-start and fault reporting. Use Value: Reduces total solution size by >40% versus discrete controllers while maintaining 90%+ efficiency across load range (10mA–500mA). |
Use Scenario: Supplying 3.3V logic, 1.8V DSP core, 5V USB interface, and ±7.5V CCD bias in handheld barcode scanners or medical endoscopes. IC Role / Device Role / Timing Role: Multi-rail sequencer with SUSD-configured main converter delivering stable core voltage even during battery sag below 2.5V. Use Value: Enables reliable operation down to 0.7V input - critical for extended runtime in battery-powered portable diagnostics equipment. |
| White LED Backlight Control | Multi-Battery Camera Systems |
Use Scenario: Driving four parallel white LEDs for smartphone front-facing camera illumination with precise current matching. IC Role / Device Role / Timing Role: Dedicated AUX3 channel with FB3H/FB3L feedback providing constant-current regulation and open-LED fault detection. Use Value: Achieves <±3% LED current accuracy across temperature without external sense resistors - improves illumination consistency and reduces thermal drift. |
Use Scenario: Supporting dual-battery configurations (e.g., main Li+ + backup NiMH) in professional DSLR bodies with seamless switchover. IC Role / Device Role / Timing Role: Step-up channel powered from either battery via Schottky-OR'd PVSU input, enabling uninterrupted operation during hot-swap events. Use Value: Maintains system uptime during battery replacement - verified by startup waveform tests showing reliable 0.9V–1.1V startup under 1mA load. |
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 (FB2 = –0.01V to +0.01V) and third auxiliary controller; lacks second AUX2 channel present in MAX1566ETL. | Optimized for CCD-based cameras requiring negative bias (–7.5V); not suitable where dual positive AUX rails (e.g., LCD + flash) are needed. | Select MAX1567ETL only when inverting output is required; MAX1566ETL provides broader flexibility for dual-positive auxiliary loads. |
| TPS65132A2YFFR | Three-channel (boost + dual LDO), no integrated step-down FETs, fixed 500kHz switching, no SUSD configurability, smaller 24-pin WQFN. | Targeted at simpler camera modules with lower current demands (<300mA) and no need for programmable topology or high-efficiency buck conversion. | Choose TPS65132A2YFFR for cost-sensitive, low-complexity designs where six-channel integration and 95% efficiency are not mandatory. |
Compared with MAX1567ETL, MAX1566ETL offers superior auxiliary channel count for dual-load systems; compared with TPS65132A2YFFR, it delivers higher integration, topology flexibility, and efficiency - making it optimal for high-performance, space-constrained digital cameras demanding full rail independence.
Availability
MAX1566ETL is available at Aetrix Electronics and suitable for digital camera power management, portable imaging device supply, and multi-battery camera systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
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 demanding applications.
The MAX1566ETL belongs to Maxim's digital camera PMIC product line, engineered to replace multiple discrete regulators with a single, thermally optimized IC that minimizes board area while supporting complex voltage sequencing and fault handling in battery-powered imaging systems.
FAQ
What is the minimum input voltage required to start up the MAX1566ETL?
The MAX1566ETL achieves startup from as low as 0.9V at +25°C (typical), with a temperature coefficient of –2300ppm/°C. However, reliable startup below 1.1V requires an external Schottky diode from battery to PVSU to bypass internal startup oscillator limitations - a requirement explicitly documented in Note 3 of the datasheet and validated in toc11 startup voltage vs. load curves.
How is the main DC-to-DC converter configured as step-up or step-down on the MAX1566ETL?
The main converter's topology is determined solely by the SUSD pin: connecting SUSD to PVSU configures it as a step-up (output on PVM); connecting SUSD to GND configures it as a step-down (input on PVM). This is a hardware-only setting - the MAX1566ETL does not support dynamic reconfiguration, and violating this hardwiring causes undefined operation per Note 6.
Does the MAX1566ETL support driving white LED arrays, and how is current regulation implemented?
Yes, the MAX1566ETL supports white LED drive via its AUX3 channel using FB3H and FB3L pins. It provides true constant-current regulation with open-LED overvoltage protection: FB3H sets the 1.25V reference for voltage feedback, while FB3L (0.19–0.21V threshold) detects open-circuit conditions - eliminating need for external current-sense resistors and enhancing safety in camera flash modules.
What protection features are built into the MAX1566ETL, and how do they behave during fault conditions?
The MAX1566ETL integrates thermal shutdown (160°C, 20°C hysteresis), overload protection (100,000 OSC-cycle timeout), and short-circuit flag (SCF). During faults, SCF pulls low, all PG_ pins disconnect, and compensation nodes (CCSU, CCM, CCSD, CC1) are actively driven to GND - ensuring rapid, deterministic shutdown without latch-up or oscillation, as confirmed in shutdown waveforms (toc17–toc20).
Can the MAX1566ETL operate from a 2-cell AA battery, and what design considerations apply?
Yes, the MAX1566ETL is explicitly qualified for 2-cell AA operation (2.4–3.2V nominal). Key considerations include: using a Schottky diode from battery to PVSU for low-voltage startup, selecting inductors rated for ≥3.6A peak current (LXSU/LXM), and ensuring thermal pad (pin 40) connects to a ≥200mm² copper pour - all validated in the typical operating circuit (page 2) and absolute maximum ratings (page 2).
MAX1566ETL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller/Converter, Digital Cameras
- Voltage - Input:
- 5.5V
- Number of Outputs:
- 6
- Voltage - Output:
- Multiple
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN-EP (6x6)
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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