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Analog Devices Inc./Maxim Integrated MAX1797EUA-TG074
- Part No.:
- MAX1797EUA-TG074
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1797EUA-TG074.pdf
- Description:
- IC REG BOOST ADJ/2V 550MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX1797EUA-TG074 from Maxim Integrated is a high-efficiency, step-up DC-DC converter optimized for portable battery-powered devices requiring 1A output current capability. It features True Shutdown™ circuitry (output fully disconnected from input in shutdown), LX-damping for EMI reduction, and an always-active LBI/LBO battery monitor comparator. With startup guaranteed from +0.85V and operation down to +0.7V input, it supports single-cell alkaline or NiMH applications delivering regulated +3.3V or +5.0V outputs.
For engineers reviewing the MAX1797EUA-TG074 datasheet, MAX1797EUA-TG074 pinout, MAX1797EUA-TG074 application, or MAX1797EUA-TG074 equivalent, this page provides verified technical context, confirmed pin functions, real-world efficiency curves, validated alternative parts with documented differences, and supply-chain support details specific to the MAX1797EUA-TG074 variant.
Technical Context
The MAX1797EUA-TG074 uses a minimum-off-time, current-limited control scheme combining PWM-like efficiency with pulse-skipping quiescent current performance - achieving 25μA operating current and up to 95% peak efficiency. Its internal synchronous rectifier eliminates external Schottky diodes, while the integrated N-channel (0.17Ω typ) and P-channel (0.27Ω typ) MOSFETs enable high-current boost conversion with low conduction loss.
True Shutdown™ disconnects OUT from BATT via internal switches, reducing shutdown current to ≤2μA and placing OUT in high-impedance state. The dedicated LX-damping switch (100–400Ω) actively suppresses inductor ringing during energy depletion, directly lowering radiated EMI without affecting output ripple amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Limit | 1A (NFET only) - enables full-load operation with compact 22µH inductors and supports ≥400mA steady-state output at +3.3V from +2V input |
| Startup Input Voltage | +0.85V (typ) - allows reliable start-up from near-dead single-cell alkaline batteries |
| Quiescent Supply Current | 25μA - minimizes no-load battery drain in always-on portable systems |
| Shutdown Current | ≤2μA - ensures negligible battery leakage during extended standby |
| Feedback Reference Voltage | 1.24V (±0.04V) - sets precise adjustable output range from +2.0V to +5.5V using external resistive divider |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(ON) NFET/PFET switches, reducing thermal load on 8-pin μMAX package |
| LX Damping Switch RON | 100–400Ω - actively clamps inductor ring-down energy to suppress EMI peaks without increasing output ripple |
Pinout & Package
MAX1797EUA-TG074 is housed in an 8-pin μMAX package (3.0mm × 3.0mm × 1.09mm), compatible with standard SO-8 footprints but occupying half the area and height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LBI | Low-battery comparator input | Monitors input voltage with 0.85V threshold; remains active in shutdown to enable autonomous battery cutoff |
| 2 - FB | Dual-Mode™ feedback input | Selects preset +3.3V (tied to OUT), +5.0V (tied to GND), or adjustable output (resistive divider from OUT to GND) |
| 3 - LBO | Open-drain low-battery output | Sinks current when LBI > 0.85V; high-impedance otherwise; operates continuously including shutdown mode |
| 4 - SHDN | Active-low shutdown control | Pull high (>0.8×VBATT) to enter shutdown (OUT high-Z, ≤2μA IQ); pull low to enable regulation |
| 5 - GND | Power and signal reference ground | Must be connected directly to PCB ground plane; critical for EMI control and current-sense accuracy |
| 6 - LX | Switch node connection | Drives external inductor; integrates damping switch to suppress ringing; requires short, low-inductance layout |
| 7 - OUT | Regulated power output & bootstrap supply | Provides VOUT and powers internal circuitry; high-impedance in shutdown; must be decoupled with ≥47µF capacitor |
| 8 - BATT | Battery input & damping switch connection | Accepts +0.7V to +5.5V input; supplies damping switch bias; connects to input capacitor (≥47µF) |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Fully disconnects OUT from BATT in shutdown, eliminating parasitic discharge paths and enabling zero-load battery preservation |
| Synchronous Rectification | Integrates PFET rectifier to replace external Schottky diode - reduces board area, cost, and forward-voltage losses |
| LX-Damping Circuitry | On-chip switch actively dissipates inductor ring-down energy, cutting EMI emissions without degrading output ripple performance |
| Always-On LBI/LBO Comparator | Operates independently of regulator state - enables battery monitoring and auto-shutdown even during system sleep |
| Ultra-Low Quiescent Current | 25μA operating current extends runtime in intermittent-use portable devices such as PDAs and audio players |
Applications
| Portable Digital Audio Players | Wireless Handsets |
|---|---|
Use Scenario: Powering DSP, DAC, and RF sections from single-cell alkaline/NiMH battery with dynamic load steps. IC Role / Device Role / Timing Role: Primary step-up regulator delivering stable +3.3V or +5.0V rail; manages battery voltage sag during transmit bursts. Use Value: 95% peak efficiency and 25μA quiescent current maximize playback time; True Shutdown preserves battery charge during pause/standby. |
Use Scenario: Supplying GSM/EDGE power amplifier and baseband ICs from declining single-cell input. IC Role / Device Role / Timing Role: High-current boost converter supporting pulsed 1A loads; LBI/LBO triggers graceful shutdown before brownout. Use Value: 1A current limit enables direct drive of PA stages; LX damping reduces conducted EMI interfering with cellular receive sensitivity. |
| PDAs / Palmtops | Portable Terminals |
Use Scenario: Providing clean +3.3V for microcontroller, LCD backlight driver, and memory interface in space-constrained handhelds. IC Role / Device Role / Timing Role: Main system power regulator with integrated battery monitoring; maintains operation down to +0.7V input. Use Value: μMAX package saves PCB area; adjustable FB allows optimization for different display/backlight requirements. |
Use Scenario: Powering barcode scanner engine, MCU, and wireless module in industrial handheld terminals operating across wide temperature ranges. IC Role / Device Role / Timing Role: Robust DC-DC converter with -40°C to +85°C rating; LBO-driven shutdown prevents data corruption during low-battery events. Use Value: Guaranteed startup from +0.85V ensures reliability with aging batteries; high-temperature operation supports sealed industrial enclosures. |
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 |
|---|---|---|---|
| MAX1796EUA+ | 0.5A current limit (vs. 1A), identical pinout, same μMAX package, shared FB/LBI/LBO functionality | Lower output current capability limits use to <300mA loads at +3.3V; suitable where thermal budget or inductor size restricts 1A designs | Select MAX1796EUA+ when load current stays below 300mA and smaller inductor footprint is prioritized over peak power delivery |
| TPS61022RSAR | 2.5A switch current limit, 2.5V–5.5V input, fixed +5.0V output, 1.2MHz switching frequency, no integrated LBI/LBO comparator | Lacks battery monitoring circuitry; requires external components for low-battery detection; higher switching frequency demands tighter layout control | Choose TPS61022RSAR for higher-output-current applications needing >1A, accepting added complexity for battery monitoring |
Compared with MAX1796EUA+, the MAX1797EUA-TG074 delivers double the current limit for demanding loads while retaining identical footprint and monitoring features; versus TPS61022RSAR, it trades raw current headroom for integrated battery sensing and lower EMI via LX damping - simplifying design in noise-sensitive portable systems.
Availability
MAX1797EUA-TG074 is available at Aetrix Electronics and suitable for portable digital audio players, wireless handsets, and industrial handheld terminals requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX1797EUA-TG074 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 industrial, medical, communications, and consumer applications.
The MAX1795/MAX1796/MAX1797 family was engineered specifically for ultra-low-power, high-efficiency boost conversion in space-constrained portable electronics - emphasizing minimal quiescent current, integrated battery monitoring, and EMI-conscious architecture.
FAQ
What is the minimum input voltage required for MAX1797EUA-TG074 to start up?
The MAX1797EUA-TG074 guarantees startup from +0.85V at +25°C with a 3kΩ load. Once running, it continues operation down to +0.7V input. This enables reliable operation from nearly depleted single-cell alkaline or NiMH batteries, making it ideal for long-life portable applications where battery voltage decay is significant.
Does MAX1797EUA-TG074 support adjustable output voltage, and how is it configured?
Yes, the MAX1797EUA-TG074 supports adjustable output from +2.0V to +5.5V using a resistive voltage divider between OUT and GND, with the FB pin connected to the divider midpoint. The internal feedback reference is 1.24V, and resistor values must keep total divider impedance ≤250kΩ to maintain accuracy and minimize bias current error.
How does the True Shutdown™ feature of MAX1797EUA-TG074 improve system power management?
True Shutdown™ fully disconnects the output from the input using internal switches, reducing shutdown current to ≤2μA and placing OUT in high-impedance state. Unlike conventional boost converters, this eliminates DC leakage paths, preserving battery charge during extended standby - a critical advantage in battery-critical portable devices using the MAX1797EUA-TG074.
Can the LBI/LBO comparator in MAX1797EUA-TG074 operate while the DC-DC converter is in shutdown?
Yes, the LBI/LBO comparator remains fully functional during shutdown. LBI monitors input voltage against a 0.85V threshold, and LBO provides open-drain output indicating low-battery condition - both active regardless of SHDN state. This allows autonomous battery cutoff and system wake-up signaling without requiring regulator enablement.
What package type is used for MAX1797EUA-TG074, and what are its key mechanical dimensions?
The MAX1797EUA-TG074 uses an 8-pin μMAX package measuring 3.0mm × 3.0mm × 1.09mm - half the footprint and height of a standard 8-pin SOIC. Its compact size supports dense portable layouts, and the exposed pad (though not electrically connected in this variant) aids thermal dissipation in thermally constrained designs using the MAX1797EUA-TG074.
MAX1797EUA-TG074 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V (3.3V, 5V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 550mA (Switch)
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX1797EUA-TG074 FAQ
1.How can I place an order for MAX1797EUA-TG074 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1797EUA-TG074 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 MAX1797EUA-TG074 reliable?
The price and inventory of MAX1797EUA-TG074 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1797EUA-TG074 is usually 5 days.
3.What payment methods are accepted for MAX1797EUA-TG074?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1797EUA-TG074 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1797EUA-TG074?
MAX1797EUA-TG074 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1797EUA-TG074 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 MAX1797EUA-TG074?
For technical support, including MAX1797EUA-TG074 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1797EUA-TG074 requirements.
6.How does Aetrix verify that MAX1797EUA-TG074 is sourced from the original manufacturer or authorized distributors?
All MAX1797EUA-TG074 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 MAX1797EUA-TG074 meets industry standards.
7.What is the process for return or replacement of MAX1797EUA-TG074?
All MAX1797EUA-TG074 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1797EUA-TG074, 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 MAX1797EUA-TG074 part is unused and in its original packaging.
Return procedure for MAX1797EUA-TG074:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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