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Analog Devices Inc./Maxim Integrated MAX1606EUA+
- Part No.:
- MAX1606EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1606EUA+.pdf
- Description:
- IC REG BOOST ADJ 350MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:390
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Product details
Overview
MAX1606EUA+ from Maxim Integrated is a step-up DC-DC converter with integrated 0.5A N-channel LX switch and 0.75A P-channel isolation switch in an 8-pin µMAX package. It operates from 2.4V–5.5V VCC while boosting input voltages as low as 0.8V (VBATT) up to 28V output, delivering 20mA at 20V from a single Li+ cell-ideal for compact LCD bias generation in portable displays.
For engineers reviewing the MAX1606EUA+ datasheet, MAX1606EUA+ pinout, MAX1606EUA+ application, or MAX1606EUA+ equivalent, key selection criteria include true shutdown isolation, selectable 125/250/500mA inductor current limit, 88% peak efficiency at 10mA, 500kHz max switching frequency, and feedback-set output voltage ranging from VBATT to 28V.
Technical Context
The MAX1606EUA+ employs a minimum off-time, current-limited control scheme with programmable peak inductor current thresholds (125/250/500mA) set via the LIM pin. Its dual-switch architecture integrates a 28V-rated N-channel MOSFET on LX and a P-channel isolation switch between BATT and SW, enabling true shutdown by disconnecting output from input.
It features a precision 1.25V ±2.5% feedback reference (VFB), 0.1µA shutdown supply current, and supports separate VBATT (0.8V–5.5V) and VCC (2.4V–5.5V) supplies-allowing direct low-voltage battery sourcing while maintaining stable IC bias. The 8-pin µMAX package enables high-density layout with minimal external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Range | VBATT to 28V - adjustable via resistor divider on FB pin; supports LCD bias requiring >15V from sub-1V battery sources. |
| Input Voltage (VBATT) | 0.8V to 5.5V - enables operation directly from depleted alkaline, NiMH, or single-cell Li+ batteries without pre-regulation. |
| Switching Frequency | Up to 500kHz - permits use of small 10µH–100µH surface-mount inductors and ceramic output capacitors. |
| Peak Efficiency | 88% at 10mA load - achieved with L1 = 100µH, VBATT = 3.6V; reduces thermal stress in space-constrained handhelds. |
| Feedback Reference | 1.25V ±2.5% - tight tolerance enables accurate output voltage setting; input bias current ≤100nA allows high-value resistive dividers. |
| Shutdown Current | 0.1µA - ensures negligible battery drain during standby; true shutdown disconnects output from input via internal PMOS. |
| LX Switch RDS(ON) | ≤2Ω at VCC = 3.3V - limits conduction loss in low-current boost applications; supports 500mA peak current when LIM = VCC. |
Pinout & Package
Package: 8-pin µMAX (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), RoHS-compliant, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT (Pin 1) | Inductor supply input | Accepts 0.8V–5.5V battery source; connects to source of internal PMOS isolation switch; requires ≥10µF local bulk bypass. |
| FB (Pin 2) | Feedback input | Senses output voltage via resistive divider; 1.25V threshold sets VOUT; ≤100nA bias current enables high-impedance divider networks. |
| VCC (Pin 3) | IC supply input | 2.4V–5.5V logic supply; powers internal circuitry; requires ≥1µF ceramic bypass close to pin. |
| GND (Pin 4) | Power and signal ground | Common reference for all analog/digital functions; must be tied to low-impedance ground plane per layout guidelines. |
| LX (Pin 5) | Switch node | Drain of internal 28V N-channel MOSFET; high-impedance in shutdown; connects to inductor and Schottky diode anode. |
| LIM (Pin 6) | Current limit select | Configures peak inductor current: GND = 125mA, floating = 250mA, VCC = 500mA - trades ripple vs. size vs. output power. |
| SHDN (Pin 7) | Active-low enable | Pull low to enter true shutdown: isolates output, reduces ICC to 0.1µA, places LX in high-Z state. |
| SW (Pin 8) | Isolation switch output | Drain of internal PMOS; connects BATT to LX path; opens during shutdown to break output-input connection. |
Key Features
| Feature | Design Value |
|---|---|
| True shutdown isolation | Internal PMOS disconnects output from input during SHDN, eliminating standby current draw through inductor/diode path. |
| Selectably limited inductor current | 125/250/500mA thresholds via LIM pin - enables optimized inductor sizing for low-power (e.g., PDA backlight) or higher-output designs. |
| Wide VBATT operating range | 0.8V minimum input - supports operation from deeply discharged cells, extending usable battery life in portable devices. |
| High-efficiency boost topology | 88% peak efficiency at 10mA - minimizes heat generation and extends runtime in thermally constrained handheld enclosures. |
| Integrated 28V LX switch | 28V-rated N-channel MOSFET with ≤2Ω RDS(ON) - eliminates need for external high-voltage switch in LCD bias supplies. |
Applications
| LCD Bias Generation | Cellular Phone Display Supply |
|---|---|
|
Use Scenario: Powering positive and negative bias rails (e.g., +18V / –19V) for STN or TFT LCD panels in palmtop computers and PDAs. IC Role / Device Role / Timing Role: Primary DC-DC boost converter generating regulated high-voltage outputs from single-cell batteries. Use Value: Enables compact, low-component-count bias supply with true shutdown-reducing system standby power by >99% versus basic boost converters. |
Use Scenario: Providing adjustable VPOS for LCD contrast control and VNEG for common electrode bias in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Dual-rail voltage generator supporting dynamic contrast adjustment and fast panel wake-up from deep sleep. Use Value: 0.8V start-up capability maintains display functionality even with aging or cold-temperature batteries, improving user experience. |
| Handheld Terminal Power | Organizer Backlight Driver |
|
Use Scenario: Delivering stable 20V–25V bias to monochrome graphic LCDs in rugged industrial handheld terminals. IC Role / Device Role / Timing Role: High-reliability boost regulator with short-circuit protected isolation switch for harsh-environment operation. Use Value: Output short-circuit protection and 28V LX rating prevent latch-up or damage during field cable faults or ESD events. |
Use Scenario: Driving white LED backlights or electroluminescent (EL) panels requiring >15V AC/DC in personal organizers and digital diaries. IC Role / Device Role / Timing Role: Compact, low-quiescent-current DC-DC source enabling thin form factors and multi-day battery life. Use Value: 160µA typical operating current and 0.1µA shutdown current maximize battery longevity in always-on portable devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Fixed 28V output; no adjustable FB; 0.5A switch; 500kHz fixed frequency; no true shutdown isolation. | Lacks output disconnection during shutdown-output remains coupled to input via inductor/diode, drawing standby current. | Choose when fixed output voltage suffices and board space is more critical than ultra-low shutdown current. |
| LT1930ES5#TRMPBF | 26V max output; 1.2MHz switching; 0.6A switch; no integrated isolation switch; requires external PMOS for true shutdown. | Requires additional FET and gate driver for output isolation, increasing BOM count and layout complexity. | Prefer when higher switching frequency justifies added design effort and component count for smaller magnetics. |
Compared with TPS61040DRVR and LT1930ES5#TRMPBF, the MAX1606EUA+ uniquely integrates both boost switch and isolation switch in one 8-pin µMAX package, delivering true shutdown with <0.1µA current while supporting fully adjustable output from VBATT to 28V-reducing total solution size and simplifying compliance with stringent portable device standby power budgets.
Availability
MAX1606EUA+ is available at Aetrix Electronics and suitable for LCD bias generation, cellular phone display power, palmtop computer voltage scaling, handheld terminal operation, and organizer backlight driving requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for MAX1606EUA+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for portable, industrial, and communications systems.
The MAX1606EUA+ belongs to Maxim's LCD bias and portable power management product line, designed specifically to replace discrete boost solutions in space- and power-constrained handheld devices with integrated, low-quiescent-current, true-shutdown DC-DC conversion.
FAQ
What is the minimum input voltage supported by the MAX1606EUA+ for boost operation?
The MAX1606EUA+ supports a minimum VBATT input voltage of 0.8V while maintaining regulation-enabling operation from nearly depleted alkaline, NiMH, or single-cell Li+ batteries. This is achieved through its dedicated low-voltage inductor supply path independent of the 2.4V–5.5V VCC rail. The MAX1606EUA+ uses internal circuitry to extend minimum off-time during startup, limiting surge current and ensuring reliable start-up even below 1V.
How does the MAX1606EUA+ achieve true shutdown, and what is its shutdown current?
The MAX1606EUA+ achieves true shutdown by activating an internal P-channel MOSFET between BATT and SW pins, physically disconnecting the output from the input path. During shutdown (SHDN = GND), the device draws only 0.1µA typical supply current, and the LX pin enters a high-impedance state. This eliminates leakage paths through the inductor and output rectifier-unlike basic boost converters-making the MAX1606EUA+ ideal for battery-powered devices requiring zero-load standby power.
Can the MAX1606EUA+ generate negative output voltages for LCD bias?
Yes, the MAX1606EUA+ can generate negative outputs using an external charge-pump circuit connected to the LX pin, as shown in Figure 4 of the datasheet. By adding two diodes and capacitors, it produces a regulated negative rail (e.g., –19V) while maintaining feedback control on the positive output. The MAX1606EUA+'s high switching frequency and stable control loop ensure low ripple on both rails, supporting dual-rail LCD bias in compact form factors.
What are the recommended external components for a standard MAX1606EUA+ application?
A standard MAX1606EUA+ application requires: a 10µH–100µH shielded inductor (saturation current > peak limit), a Schottky diode rated >28V/≥500mA (e.g., MBRS0530), a 1µF ceramic output capacitor, a 10µF low-ESR input capacitor on BATT, a 1µF ceramic bypass on VCC, and a 10pF feed-forward capacitor from VOUT to FB for stability. Resistor values for FB divider are calculated using R1 = R2 × (VOUT / 1.25V – 1), with R2 between 10kΩ and 200kΩ.
How is the inductor current limit configured on the MAX1606EUA+?
The MAX1606EUA+ inductor current limit is set via the LIM pin: connect LIM to GND for 125mA, leave it floating for 250mA, or tie it to VCC for 500mA. These thresholds correspond to peak switching currents and directly affect output ripple, inductor size, and maximum deliverable power. The MAX1606EUA+'s current-limit selection allows designers to optimize for low-noise (low-current limit) or high-output (high-current limit) operation without changing the IC or layout.
MAX1606EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 350mA (Switch)
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX1606EUA+ FAQ
1.How can I place an order for MAX1606EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1606EUA+ 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 MAX1606EUA+ reliable?
The price and inventory of MAX1606EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1606EUA+ is usually 5 days.
3.What payment methods are accepted for MAX1606EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1606EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1606EUA+?
MAX1606EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1606EUA+ 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 MAX1606EUA+?
For technical support, including MAX1606EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1606EUA+ requirements.
6.How does Aetrix verify that MAX1606EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX1606EUA+ 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 MAX1606EUA+ meets industry standards.
7.What is the process for return or replacement of MAX1606EUA+?
All MAX1606EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1606EUA+, 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 MAX1606EUA+ part is unused and in its original packaging.
Return procedure for MAX1606EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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