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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:2,656
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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 BATT–SW 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, and features true shutdown with 0.1µA quiescent current - ideal for LCD bias generation in space-constrained portable devices.
For engineers reviewing the MAX1606EUA datasheet, MAX1606EUA pinout, MAX1606EUA application, or MAX1606EUA equivalent, key selection criteria include its selectable inductor current limit (125/250/500mA), 88% peak efficiency at 10mA load, 500kHz max switching frequency enabling compact magnetics, and true output isolation during shutdown - all critical for low-power, high-voltage bias rail design in handheld displays.
Technical Context
The MAX1606EUA implements a minimum off-time, current-limited control architecture with programmable peak inductor current via the LIM pin (GND/floating/VCC), governing duty cycle through paired one-shot timers. Its internal 28V-rated N-channel MOSFET (RLX = 2Ω typ at 3.3V) and P-channel isolation switch (RDS(ON) = 0.4Ω typ) operate independently: LX handles boost switching while SW disconnects output from input during shutdown.
This dual-switch topology enables true shutdown - eliminating leakage paths common in standard boost converters - and supports separate VBATT (0.8V–5.5V) and VCC (2.4V–5.5V) supplies, allowing direct battery sourcing below VCC's lower limit. Feedback regulation uses a precision 1.25V reference (±1.2% over temp) with 100nA input bias, enabling high-impedance resistor dividers for stable 18V–28V outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.4V to 5.5V - powers internal logic; must be ≥2.4V for UVLO release. |
| VBATT Input Range | 0.8V to 5.5V - enables ultra-low-voltage battery operation independent of VCC. |
| Max Output Voltage | 28V - supports high-voltage LCD VPOS/VNEG bias rails without external components. |
| Peak LX Current Limit | Selectable: 125mA (LIM=GND), 250mA (LIM=FLOAT), 500mA (LIM=VCC) - sets inductor size and ripple trade-offs. |
| Efficiency | 88% typical at 10mA load, 3.6V VBATT, 18V VOUT - enables >20hr runtime in low-current LCD applications. |
| Shutdown Current | 0.1µA - eliminates standby drain in always-on portable systems. |
| Switching Frequency | Up to 500kHz - permits use of ≤10µH SMD inductors and reduces EMI filtering burden. |
| Feedback Reference | 1.25V ±1.2% - ensures accurate output voltage setting across -40°C to +85°C. |
Pinout & Package
Package: 8-pin µMAX (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), thermally enhanced with 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 P-MOSFET source for isolation; requires ≥10µF local bulk cap. |
| FB (Pin 2) | Feedback input | Monitors output via resistive divider; 1.25V threshold; 100nA bias enables high-R dividers with <1% error. |
| VCC (Pin 3) | IC power supply | 2.4V–5.5V logic supply; bypass with ≥1µF ceramic cap; independent from BATT path. |
| GND (Pin 4) | Power and signal ground | Common return for VCC, FB, SHDN, LIM; must tie to ground plane within 5mm of capacitor grounds. |
| LX (Pin 5) | Boost switch node | Drain of internal 28V N-MOSFET; high-impedance in shutdown; connects to inductor and Schottky diode anode. |
| LIM (Pin 6) | Current limit select | Configures peak inductor current: GND=125mA, float=250mA, VCC=500mA - directly scales inductor size. |
| SHDN (Pin 7) | Active-low enable | Pull low to disable switching and disconnect output via P-MOSFET; tolerates up to 6V regardless of VCC/VBATT. |
| SW (Pin 8) | Isolation switch output | Drain of internal P-MOSFET; connects BATT to output path; opens during shutdown to break VOUT–VBATT leakage. |
Key Features
| Feature | Design Value |
|---|---|
| True shutdown with output isolation | Internal P-MOSFET disconnects VOUT from VBATT during SHDN, reducing standby current to 0.1µA and preventing battery drain. |
| Selectably limited inductor current | Three discrete current limits (125/250/500mA) via LIM pin state allow optimization of inductor size, cost, and ripple for each application. |
| Ultra-low input voltage capability | Operates with VBATT as low as 0.8V while maintaining regulated 18V–28V output - extends battery life in single-cell Li+ or NiMH systems. |
| High-efficiency boost conversion | 88% typical efficiency at 10mA load enables >20mA output from 3.6V Li+ with minimal thermal rise in µMAX package. |
| Integrated 28V switching elements | Combines 28V N-MOSFET (LX) and 28V P-MOSFET (SW) in one die - eliminates external high-voltage switches for LCD bias generation. |
| Stable feedback with low bias current | 1.25V reference with 100nA max FB input bias allows use of MΩ-range divider resistors, minimizing divider power loss. |
Applications
| Small LCD Panel Bias Generation | Handheld Device Power Management |
|---|---|
|
Use Scenario: Generating +18V and –19V bias rails for monochrome STN LCDs in PDAs and organizers using a single 3.6V Li+ cell. IC Role / Device Role / Timing Role: Primary DC-DC converter providing regulated high-voltage rails; LX drives boost inductor, SW isolates output during sleep mode. Use Value: Eliminates need for external isolation FETs and enables true zero-drain shutdown - extending battery life by >30% versus conventional boost ICs. |
Use Scenario: Powering auxiliary analog circuitry (e.g., touch-screen controller, backlight driver) requiring 20V from low-voltage batteries in cordless phones. IC Role / Device Role / Timing Role: High-voltage auxiliary supply; LIM pin configured for 250mA limit to balance inductor size and transient response. Use Value: 500kHz switching allows 10µH inductor (3.2mm × 2.5mm), reducing board area by 40% vs. 100µH alternatives while maintaining 88% efficiency. |
| Portable Medical Display Systems | Industrial Handheld Terminals |
|
Use Scenario: Providing stable 24V bias for electrophoretic (e-ink) display drivers in battery-powered medical monitors with strict low-power requirements. IC Role / Device Role / Timing Role: Precision voltage generator; FB divider set for 24V with 1% tolerance; SHDN controlled by system MCU for on-demand activation. Use Value: 0.1µA shutdown current ensures <1µA system standby drain - meeting IEC 62304 Class C power budget constraints. |
Use Scenario: Supplying 28V gate drive for external MOSFETs in ruggedized handheld terminals operating across –20°C to +70°C ambient. IC Role / Device Role / Timing Role: High-reliability boost stage; LIM tied to VCC for 500mA limit to support fast load transients during barcode scanning. Use Value: Guaranteed operation from –40°C to +85°C with no derating, and 28V LX rating prevents failure during 24V output short-circuits. |
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; 0.5A switch; 1.8V–6V input; no true shutdown (output remains coupled via diode). | Lacks output isolation and adjustable voltage - unsuitable where zero standby drain or variable bias is required. | Choose only if fixed 28V output and simplified layout outweigh need for true shutdown and voltage flexibility. |
| LT1930ES5#TRMPBF | 26V max output; 1.2MHz switching; 0.6A switch; no integrated isolation switch; requires external P-FET for true shutdown. | Higher frequency enables smaller inductors but adds component count and layout complexity for isolation. | Select when higher switching frequency is prioritized and external isolation FET integration is acceptable. |
Compared with TPS61040DRVR and LT1930ES5#TRMPBF, the MAX1606EUA uniquely integrates both boost and isolation switches in one µMAX package with user-selectable current limiting and true shutdown - reducing BOM count by two FETs and eliminating PCB routing for isolation control while enabling sub-1µA system standby.
Availability
MAX1606EUA is available at Aetrix Electronics and suitable for LCD bias generation, handheld device power management, portable medical displays, industrial handheld terminals, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and portable applications.
The MAX1606EUA belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for compact, low-power LCD bias generation in battery-operated handheld devices - emphasizing true shutdown, ultra-low input voltage operation, and integrated isolation.
FAQ
What is the minimum input voltage the MAX1606EUA can boost from?
The MAX1606EUA accepts VBATT as low as 0.8V while maintaining regulation up to 28V output. This capability stems from its dedicated BATT input path separate from VCC, allowing direct connection to depleted single-cell batteries. The MAX1606EUA achieves this using a current-mode control scheme optimized for low-duty-cycle operation at ultra-low inputs, verified across –40°C to +85°C.
How does the MAX1606EUA achieve true shutdown?
The MAX1606EUA achieves true shutdown by integrating a P-channel MOSFET between BATT and SW pins. When SHDN is pulled low, this internal switch opens, physically disconnecting the output from the input path - unlike standard boost converters where the output remains coupled through the inductor and diode. This design reduces MAX1606EUA shutdown current to 0.1µA and eliminates battery drain during sleep mode.
Can the MAX1606EUA generate negative output voltages?
Yes, the MAX1606EUA can generate negative voltages such as –19V for LCD VNEG bias using an external charge-pump circuit (two diodes and capacitors) connected to the LX pin, as shown in Figure 4 of the datasheet. Feedback remains connected to the positive output, and the MAX1606EUA's high switching frequency (up to 500kHz) ensures efficient charge transfer with small ceramic capacitors.
What is the purpose of the LIM pin on the MAX1606EUA?
The LIM pin on the MAX1606EUA selects the peak inductor current limit: 125mA (LIM = GND), 250mA (LIM = floating), or 500mA (LIM = VCC). This feature allows designers to optimize inductor size, output ripple, and efficiency for specific load requirements. For example, setting LIM = GND enables use of a 4.7µH inductor in space-constrained PDAs, while LIM = VCC supports higher current loads in industrial terminals.
What package type and dimensions does the MAX1606EUA use?
The MAX1606EUA uses the 8-pin µMAX package (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), specified in Maxim's package outline 21-0036. It features an exposed thermal pad (non-electrical) for improved heat dissipation in high-efficiency applications. The µMAX footprint is pin-compatible with industry-standard uSOP-8 packages, simplifying layout and assembly.
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:
- Obsolete
- 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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