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Analog Devices Inc./Maxim Integrated MAX1606EUA+T
- Part No.:
- MAX1606EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1606EUA+T.pdf
- Description:
- IC REG BOOST ADJ 350MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
MAX1606EUA+T from Maxim Integrated is a step-up DC-DC converter with integrated 0.5A N-channel MOSFET and 0.75A P-channel isolation switch, operating from 0.8V battery input to deliver up to 28V output in an 8-pin µMAX package. It supports selectable current limits (125/250/500mA), achieves 88% efficiency at 10mA load, and features true shutdown disconnecting output from input - ideal for low-power LCD bias generation in portable devices.
For engineers reviewing the MAX1606EUA+T datasheet, MAX1606EUA+T pinout, MAX1606EUA+T application, or MAX1606EUA+T equivalent, key selection criteria include its 0.8V minimum input capability, 28V output voltage range, 500kHz max switching frequency, true shutdown functionality, and µMAX package thermal performance in space-constrained designs.
Technical Context
The MAX1606EUA+T implements a minimum off-time, current-limited control scheme with programmable peak inductor current via the LIM pin (GND/floating/VCC), enabling optimization for ripple, size, or power delivery. Its dual-switch architecture integrates both the main boost switch (LX) and output isolation switch (SW), eliminating external PMOS for true shutdown.
It separates power domains: VBATT (0.8V–5.5V) supplies the inductor path while VCC (2.4V–5.5V) powers internal logic, allowing ultra-low-voltage battery operation independent of IC bias supply. Feedback regulation uses a precise 1.25V reference with ≤100nA input bias current, supporting high-impedance resistor dividers for stable 28V output setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | VBATT to 28V - enables single-cell Li+ or NiMH battery to power 18V–20V LCD bias rails without external components. |
| Input Voltage (VBATT) | 0.8V to 5.5V - supports operation down to near-dead battery states, critical for handheld device runtime extension. |
| Switching Frequency | Up to 500kHz - permits use of compact 10µH surface-mount inductors and reduces output capacitor ESR requirements. |
| Current Limit Options | 125mA / 250mA / 500mA - selectable via LIM pin connection, allowing trade-off between inductor size, output ripple, and max load capability. |
| Shutdown Current | 0.1µA - ensures negligible battery drain during system sleep, essential for always-on portable displays. |
| Feedback Reference | 1.25V ±20mV - high-accuracy reference enables <1% output voltage tolerance with standard 1% resistors in feedback divider. |
| Efficiency | 88% at 10mA load, 3.6V input - delivers high conversion efficiency across light-to-moderate loads typical of LCD segment drivers. |
Pinout & Package
MAX1606EUA+T is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), optimized for thermal dissipation and PCB area minimization in portable applications.
| 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 | Monitors output via resistive divider; 1.25V threshold sets output voltage; ≤100nA bias enables high-value resistors for low quiescent current. |
| VCC (Pin 3) | IC logic supply | 2.4V–5.5V bias rail for internal circuitry; must be bypassed with ≥1µF ceramic capacitor close to pin. |
| GND (Pin 4) | Power and signal ground | Common return for all circuits; requires low-inductance connection to ground plane within 5mm of input/output capacitors. |
| LX (Pin 5) | Boost switch node | Drain of internal 28V N-channel MOSFET; switches inductor current; high-impedance during shutdown. |
| LIM (Pin 6) | Current limit select | Configures peak inductor current: GND = 125mA, floating = 250mA, VCC = 500mA - directly scales inductor size and ripple. |
| SHDN (Pin 7) | Active-low shutdown control | Pulling low disables switching, drops ICC to 0.1µA, and turns off PMOS isolation switch to fully disconnect output from input. |
| SW (Pin 8) | Isolation switch output | Drain of internal PMOS used for true shutdown; connects to inductor output side - eliminates diode-drop leakage path present in basic boost converters. |
Key Features
| Feature | Design Value |
|---|---|
| True shutdown with output isolation | Internal PMOS disconnects output from input during shutdown, eliminating standby current draw through inductor/diode path. |
| Selectably limited inductor current | Three discrete current limits (125/250/500mA) reduce component count vs. external current-sense solutions and enable scalable inductor sizing. |
| Ultra-low input voltage start-up | Operates from 0.8V VBATT - extends usable battery range beyond conventional boost ICs requiring ≥1.8V input. |
| High-efficiency 500kHz operation | Enables use of small 10µH inductors and 1µF ceramic output capacitors, reducing BOM cost and board area by >40% vs. 100kHz designs. |
| Integrated 28V LX switch with 2Ω RDS(ON) | Eliminates need for external high-voltage switch; 2Ω on-resistance at 3.3V VCC supports efficient 20mA@20V output from single Li+ cell. |
Applications
| Small LCD Bias Generation | Portable Communication Devices |
|---|---|
|
Use Scenario: Powering positive and negative bias rails (e.g., +18V / –19V) for monochrome STN or CSTN LCD panels in PDAs and organizers. IC Role / Device Role / Timing Role: Primary DC-DC converter generating regulated high-voltage bias from single-cell battery; provides true shutdown to eliminate display ghosting during sleep mode. Use Value: Enables full panel power-down with 0.1µA quiescent current, extending battery life by >3× versus non-isolating boost converters. |
Use Scenario: Supplying 20V LCD bias in cellular handsets and cordless phone displays where battery voltage drops below 1.0V during discharge. IC Role / Device Role / Timing Role: Step-up regulator with 0.8V minimum input capability; operates across full battery discharge curve without brownout or reset events. Use Value: Maintains stable display contrast and backlight control down to end-of-life battery voltage, improving user experience and device reliability. |
| Palmtop Computer Displays | Handheld Industrial Terminals |
|
Use Scenario: Generating dual-polarity bias for high-resolution grayscale LCDs in palmtop PCs with tight thermal and space constraints. IC Role / Device Role / Timing Role: Compact µMAX-packaged boost controller delivering 28V output with 500kHz switching to minimize passive component footprint. Use Value: Reduces total solution size by integrating both boost and isolation switches, freeing PCB area for processor and memory in sub-100g devices. |
Use Scenario: Providing robust LCD bias in ruggedized handheld terminals used in logistics, field service, and warehouse scanning. IC Role / Device Role / Timing Role: High-reliability DC-DC converter with 88% efficiency at partial load and indefinite short-circuit protection on SW pin. Use Value: Ensures uninterrupted display operation under transient overloads (e.g., ESD-induced shorts) without latch-up or thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Fixed 28V output; no adjustable FB reference; 0.5A switch; 1.8V min input; no true shutdown isolation switch. | Lacks output disconnection during shutdown - unsuitable where zero-load leakage is required. | Choose when fixed-output simplicity outweighs need for true shutdown and ultra-low input voltage support. |
| LT1930ES5#TRMPBF | 26V max output; 1.5A switch; 1.5V min input; no integrated isolation switch; higher quiescent current (100µA). | Cannot achieve 0.8V start-up or true shutdown; requires external PMOS for output isolation. | Prefer when higher output current (>20mA) is needed and board space allows external isolation FET. |
Compared with TPS61040DRVR and LT1930ES5#TRMPBF, MAX1606EUA+T uniquely combines 0.8V input capability, true output isolation, and 28V adjustable output in a single µMAX package - making it the only option for space-constrained, ultra-low-voltage LCD bias applications requiring zero-standby leakage.
Availability
MAX1606EUA+T is available at Aetrix Electronics and suitable for LCD bias generation, portable communication devices, and handheld industrial terminals requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MAX1606EUA+T 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 ICs for industrial, communications, and consumer applications.
The MAX1606EUA+T belongs to Maxim's LCD bias supply product line, engineered specifically for ultra-low-input-voltage, high-efficiency, space-constrained display power applications in portable electronics.
FAQ
What is the minimum input voltage supported by the MAX1606EUA+T?
The MAX1606EUA+T supports a minimum input voltage of 0.8V on the BATT pin, enabling operation from nearly depleted single-cell batteries. This capability is enabled by its dedicated low-voltage inductor supply path separate from the 2.4V–5.5V VCC logic supply. The MAX1606EUA+T maintains regulation and soft-start functionality even at this ultra-low input, making it uniquely suited for maximizing runtime in portable LCD applications.
How does the true shutdown feature of the MAX1606EUA+T differ from standard shutdown modes?
Unlike standard boost converters that leave the output connected to input through the inductor and diode during shutdown, the MAX1606EUA+T uses an internal P-channel MOSFET between BATT and SW to physically disconnect the output. This true shutdown reduces supply current to 0.1µA and prevents any load current from drawing power from the battery. The MAX1606EUA+T thus eliminates display ghosting and extends battery shelf life in always-on portable devices.
Can the MAX1606EUA+T generate negative output voltages for LCD bias?
Yes, the MAX1606EUA+T can generate negative voltages 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 output (e.g., –19V) while maintaining feedback control on the positive rail. The MAX1606EUA+T's high switching frequency and stable control loop ensure low ripple and good regulation on both polarities without requiring additional ICs.
What are the recommended inductor and diode values for a typical MAX1606EUA+T design?
For a standard 18V output from 3.6V input, Maxim recommends a 10µH surface-mount inductor with ≥500mA saturation current and a Schottky diode such as the MBRS0530 (30V, 0.5A) or EP05Q03L. Inductor DCR should be <0.5Ω to maintain efficiency, and the diode must have <0.4V forward drop at peak current. The MAX1606EUA+T's 500kHz operation allows these compact components while sustaining 88% efficiency at 10mA load.
How is the output voltage set on the MAX1606EUA+T?
The MAX1606EUA+T output voltage is set using a resistive divider from VOUT to the FB pin, with a precise 1.25V internal reference. For example, to set 18V output, use R2 = 75kΩ and R1 = 1MΩ. The MAX1606EUA+T's ≤100nA FB bias current allows high-value resistors, minimizing divider current to <200nA - critical for battery-powered systems. Feed-forward capacitor (CFF ≈ 10pF) from VOUT to FB improves stability across wide battery voltage ranges.
MAX1606EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX1606EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1606EUA+T 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+T reliable?
The price and inventory of MAX1606EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1606EUA+T is usually 5 days.
3.What payment methods are accepted for MAX1606EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1606EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1606EUA+T?
MAX1606EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1606EUA+T 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+T?
For technical support, including MAX1606EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1606EUA+T requirements.
6.How does Aetrix verify that MAX1606EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX1606EUA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX1606EUA+T?
All MAX1606EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1606EUA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX1606EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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