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Analog Devices Inc./Maxim Integrated MAX1796EUA+T
- Part No.:
- MAX1796EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1796EUA+T.pdf
- Description:
- IC REG BOOST ADJ 400MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,986
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Product details
Overview
MAX1796EUA+T from Maxim Integrated is a high-efficiency, step-up DC-DC converter optimized for portable handheld devices. It delivers up to 300mA output current at 3.3V (or 200mA at 5.0V) from input as low as 0.7V, features True Shutdown™ for full output-input disconnect in shutdown mode, and integrates synchronous rectification to eliminate external Schottky diodes-used in wireless handsets and PDAs.
For engineers reviewing the MAX1796EUA+T datasheet, MAX1796EUA+T pinout, MAX1796EUA+T application, or MAX1796EUA+T equivalent, this page provides verified technical context, confirmed pin functions, validated efficiency and quiescent current specs, and two rigorously cross-checked alternative parts for low-voltage boost conversion in battery-powered systems.
Technical Context
The MAX1796EUA+T uses a minimum-off-time, current-limited control architecture combining PWM-like efficiency with pulse-skipping ultra-low quiescent current (25μA). Its internal N-channel and P-channel MOSFETs feature RDS(ON) of 0.17Ω and 0.27Ω respectively, enabling >95% peak efficiency across 1.0–5.5V input range.
It implements proprietary LX-damping circuitry to suppress inductor ringing and reduce EMI, while maintaining active LBI/LBO comparator functionality during shutdown-enabling autonomous low-battery detection without external supervision. The device supports dual-mode feedback (3.3V/5.0V preset or adjustable 2.0–5.5V via resistor divider) and operates up to 500kHz switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300mA @ 3.3V (VBATT = +2V); enables powering 3.3V logic rails from single-cell Li-ion or alkaline sources |
| Input Voltage Range | +0.7V to +5.5V; allows startup from 0.85V and operation down to near-dead battery voltage |
| Quiescent Current | 25μA; minimizes standby drain in always-on portable systems |
| Shutdown Current | 2μA; ensures negligible battery leakage when disabled |
| Efficiency | >95% peak; achieved via synchronous rectification and low RDS(ON) switches, eliminating external diode loss |
| LX Switch Current Limit | 0.5A (NFET only); defines maximum inductor peak current and constrains external component sizing |
| Feedback Reference Voltage | 1.24V (typ); sets precision output regulation point for adjustable configurations |
Pinout & Package
MAX1796EUA+T is housed in an 8-pin μMAX package (3.0mm × 3.0mm × 1.09mm), compatible with standard 0.050" pitch PCB layouts and offering half the footprint of an 8-pin SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LBI | Low-battery comparator input | Monitors input voltage; remains active in shutdown; threshold = 0.85V (±25mV hysteresis) |
| 2 - FB | Dual-mode feedback input | Selects 3.3V (FB = OUT), 5.0V (FB = GND), or adjustable output (resistor divider from OUT to GND) |
| 3 - LBO | Open-drain low-battery output | Sinks current when LBI > 0.85V; high-impedance otherwise; functional in shutdown |
| 4 - SHDN | Active-high shutdown control | Drives IC into <2μA shutdown state; OUT goes high-impedance; LBI/LBO remain active |
| 5 - GND | Power and signal ground reference | Must be connected directly to ground plane; critical for noise suppression and thermal performance |
| 6 - LX | Inductor switch node | Connects to inductor; internal NFET/PFET switching node; requires short, low-inductance trace |
| 7 - OUT | Regulated power output | Provides boosted output (3.3V/5.0V/adjustable); supplies bootstrap power to IC; high-Z in shutdown |
| 8 - BATT | Battery input & damping switch connection | Accepts 0.7–5.5V input; hosts internal damping switch to suppress LX ringing and reduce EMI |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Fully disconnects OUT from BATT in shutdown-eliminates DC leakage path and removes need for external blocking FET or diode |
| Synchronous Rectification | Integrated PFET replaces external Schottky diode, reducing conduction loss and board area while improving efficiency by ~5–10% |
| LX-Damping Circuitry | Internal damping switch (RDAMP = 100–400Ω) actively dissipates inductor ring energy, lowering radiated EMI without affecting VOUT ripple |
| LBI/LBO Comparator in Shutdown | Enables autonomous battery monitoring and system-level shutdown sequencing without waking main controller |
| Startup from 0.85V | Allows operation from nearly depleted single-cell batteries (e.g., 1× alkaline or NiMH), extending usable runtime |
Applications
| Portable Digital Audio Players | Wireless Handsets |
|---|---|
Use Scenario: Powering 3.3V audio DACs and RF front-end ICs from a single 1.5V alkaline cell. IC Role / Device Role / Timing Role: Step-up DC-DC converter providing regulated 3.3V rail with <25μA quiescent current during playback pause. Use Value: Extends battery life by minimizing no-load current and enabling operation down to 0.7V input. |
Use Scenario: Generating stable 5.0V supply for GSM/GPRS power amplifier stages from a 3.6V Li-ion battery. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering up to 200mA at 5.0V with EMI-suppressed LX switching. Use Value: Reduces conducted/radiated emissions via LX-damping, easing RF coexistence and EMC certification. |
| PDA / Palmtop Systems | Portable Terminals |
Use Scenario: Supplying 3.3V I/O and memory interface rails in a compact PDA powered by two AA cells. IC Role / Device Role / Timing Role: Compact μMAX-packaged boost regulator supporting dual-mode feedback for flexible voltage selection. Use Value: Enables space-constrained designs with minimal external components-no Schottky diode required. |
Use Scenario: Providing regulated 3.3V for microcontroller, display backlight driver, and barcode scanner module. IC Role / Device Role / Timing Role: Battery-backed DC-DC converter with integrated LBI/LBO comparator for low-battery warning and graceful shutdown. Use Value: Eliminates need for separate supervisor IC-LBO remains active in shutdown to trigger host MCU reset or alert. |
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 |
|---|---|---|---|
| TPS61022DRCT | Higher 2A switch current limit; 2.5V–5.5V input; fixed 3.3V/5.0V options only; no LBI/LBO comparator | Supports higher load currents but lacks integrated battery monitoring; requires external comparator for low-battery detection | Choose for >300mA loads where comparator functionality is handled elsewhere |
| SP6650ES-L/TR | 0.5A current limit; 0.9V–4.0V input; 3.3V/5.0V fixed outputs; 28μA quiescent current; no LX damping or LBI/LBO | Lower input start-up voltage (0.9V) but no EMI-reduction features or shutdown-active monitoring | Choose for cost-sensitive, lower-EMI-tolerance applications with simpler supervision needs |
Compared with TPS61022DRCT and SP6650ES-L/TR, MAX1796EUA+T uniquely combines 0.5A current capability, sub-1V startup, True Shutdown™, LX damping, and always-active LBI/LBO in a single μMAX package-making it optimal for compact, battery-critical portable systems requiring autonomous power management.
Availability
MAX1796EUA+T is available at Aetrix Electronics and suitable for portable digital audio players, wireless handsets, and PDA/palmtop systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for MAX1796EUA+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 and mixed-signal ICs for power management, sensing, and communication.
The MAX1795/MAX1796/MAX1797 family was designed specifically for ultra-low-power, small-footprint boost conversion in battery-powered portable electronics-emphasizing startup-from-dead-battery, EMI control, and integrated supervision.
FAQ
What is the minimum input voltage required for MAX1796EUA+T to start up?
The MAX1796EUA+T guarantees startup from +0.85V at +25°C with a 3kΩ load. Once operating, it continues regulating down to +0.7V input. This capability allows MAX1796EUA+T to extract usable energy from nearly depleted single-cell alkaline or NiMH batteries, extending device runtime beyond conventional boost converters.
Does MAX1796EUA+T require an external Schottky diode?
No, MAX1796EUA+T does not require an external Schottky diode. It integrates a synchronous rectifier using an internal P-channel MOSFET, which replaces the external diode and reduces conduction losses. This design improves efficiency-up to >95%-and eliminates associated board space, BOM cost, and thermal concerns linked to discrete diodes.
How does the True Shutdown™ feature work in MAX1796EUA+T?
In MAX1796EUA+T, True Shutdown™ fully disconnects the output (OUT) from the input (BATT) when SHDN is asserted high. This places OUT in a high-impedance state and eliminates the DC conduction path typical of conventional boost converters in shutdown. As a result, MAX1796EUA+T draws only 2μA shutdown current and prevents battery drain through the output rail.
Can MAX1796EUA+T generate an adjustable output voltage?
Yes, MAX1796EUA+T supports adjustable output from +2.0V to +5.5V using a resistive voltage divider between OUT and GND, with FB connected to the divider midpoint. The internal feedback reference is 1.24V (typ), and resistor values must be selected accordingly-R2 ≤ 250kΩ is recommended to maintain accuracy and minimize bias current error.
Is the LBI/LBO comparator functional when MAX1796EUA+T is in shutdown mode?
Yes, the LBI/LBO comparator remains fully operational during shutdown of MAX1796EUA+T. LBI accepts input down to 0.85V with ±25mV hysteresis, and LBO provides open-drain output that sinks current when LBI exceeds threshold. This enables autonomous low-battery detection and system-level shutdown sequencing without waking the main processor.
MAX1796EUA+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 (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V (3.3V, 5V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 400mA (Switch)
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX1796EUA+T FAQ
1.How can I place an order for MAX1796EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1796EUA+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 MAX1796EUA+T reliable?
The price and inventory of MAX1796EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1796EUA+T is usually 5 days.
3.What payment methods are accepted for MAX1796EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1796EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1796EUA+T?
MAX1796EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1796EUA+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 MAX1796EUA+T?
For technical support, including MAX1796EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1796EUA+T requirements.
6.How does Aetrix verify that MAX1796EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX1796EUA+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 MAX1796EUA+T meets industry standards.
7.What is the process for return or replacement of MAX1796EUA+T?
All MAX1796EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1796EUA+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 MAX1796EUA+T part is unused and in its original packaging.
Return procedure for MAX1796EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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