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Analog Devices Inc./Maxim Integrated MAX1796EUA
- Part No.:
- MAX1796EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1796EUA.pdf
- Description:
- IC REG BOOST ADJ 400MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,510
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Product details
Overview
MAX1796EUA 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 datasheet, MAX1796EUA pinout, MAX1796EUA application, or MAX1796EUA equivalent, this page provides verified specifications including 0.5A current limit, 25μA quiescent current, 8-pin μMAX package, and confirmed LBI/LBO comparator operation during shutdown-critical for battery monitoring in ultra-low-power systems.
Technical Context
The MAX1796EUA employs a minimum-off-time, current-limited control architecture combining PWM efficiency with pulse-skipping quiescent current benefits, enabling up to 500kHz switching frequency. Its internal N-channel and P-channel MOSFETs feature RDS(ON) of 0.17Ω and 0.27Ω respectively, and it integrates LX-damping circuitry to suppress ringing-induced EMI.
True Shutdown™ fully isolates OUT from BATT via internal switches, reducing shutdown current to ≤2μA while keeping LBI/LBO active. The FB pin supports three configurations: GND for 5.0V, OUT for 3.3V, or resistive divider for adjustable 2.0V–5.5V output with 1.24V feedback reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Limit | 0.5A (NFET only)-sets maximum inductor peak current and defines external component sizing for mid-power portable loads |
| Quiescent Supply Current | 25μA-enables >1000-hour battery life in always-on monitoring circuits powered by single-cell alkaline or NiMH |
| Startup Input Voltage | 0.85V (typ)-allows reliable boot from nearly depleted batteries, critical for legacy portable audio players |
| Feedback Reference Voltage | 1.24V (min/max 1.19V/1.29V)-determines precision of adjustable output voltage using external resistor divider |
| Shutdown Current | ≤2μA-ensures negligible battery drain during device sleep, validated across -40°C to +85°C operating range |
| Efficiency | >95% (typ at 3.3V/100mA, VBATT=2.4V)-achieved via synchronous rectification and low RDS(ON) MOSFETs, eliminating Schottky loss |
| Package | 8-pin μMAX (3.0mm × 3.0mm × 1.09mm)-halves footprint vs. 8-pin SO, enabling compact PCB layouts in space-constrained handsets |
Pinout & Package
MAX1796EUA is housed in an 8-pin μMAX package (3.0mm × 3.0mm × 1.09mm), specified for -40°C to +85°C operation, with exposed pad thermal enhancement per Maxim's package drawing 21-0127.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBI | Low-battery comparator input | Trips at 0.85V (±25mV hysteresis); remains active in shutdown to enable autonomous battery cutoff without host MCU intervention |
| 2 FB | Dual-mode feedback input | Selects preset 3.3V (connect to OUT), 5.0V (connect to GND), or adjustable output (resistive divider); bias current ≤100nA minimizes divider power loss |
| 3 LBO | Open-drain low-battery output | Sinks current when LBI > 0.85V; high-impedance otherwise; operates in shutdown and tolerates up to 6V pull-up regardless of VOUT |
| 4 SHDN | Active-high shutdown control | Drives device into <2μA shutdown state when pulled ≥0.8×VBATT; OUT goes high-Z, but LBI/LBO remain functional |
| 5 GND | Power and signal ground | Primary return path for LX switch, feedback, and comparator circuits; must be connected directly to solid ground plane per layout guidelines |
| 6 LX | Inductor switch node | Connects to inductor center tap; integrates damping switch (100–400Ω) to suppress ringing and reduce EMI without affecting VOUT ripple |
| 7 OUT | Regulated power output | Provides bootstrap supply to IC; delivers up to 300mA at 3.3V; high-Z in shutdown; leakage <0.2μA at 5.5V |
| 8 BATT | Battery input & damping switch connection | Accepts 0.7V–5.5V input; powers internal circuitry during startup; connects to damping resistor network for LX energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Fully disconnects OUT from BATT in shutdown, eliminating DC leakage paths and removing need for external blocking FET or diode |
| Synchronous Rectification | Integrated P-channel MOSFET replaces external Schottky diode, reducing conduction loss and board area while enabling >95% efficiency |
| LX Damping Circuitry | On-chip damping switch (100–400Ω) clamps inductor ring-down energy, cutting EMI without increasing output ripple or requiring external RC snubber |
| LBI/LBO Comparator in Shutdown | Enables continuous battery monitoring during system sleep-LBO remains open-drain active, allowing host-independent low-voltage cutoff |
| Adjustable Output Voltage | 2.0V–5.5V range set by external resistor divider on FB pin, with 1.24V reference tolerance ±0.05V ensuring ±3% output accuracy over temperature |
Applications
| Wireless Handsets | Portable Digital Audio Players |
|---|---|
|
Use Scenario: Powering RF front-end modules and baseband processors from single-cell Li-ion or alkaline batteries with rapidly declining voltage. IC Role / Device Role / Timing Role: Step-up regulator delivering stable 3.3V/5.0V rail while maintaining <25μA quiescent draw during standby and <2μA in shutdown. Use Value: Extends usable battery life by 30% vs. diode-based boost converters and enables automatic shutdown below 0.85V via LBI/LBO feedback loop. |
Use Scenario: Supplying DSP, DAC, and LCD backlight drivers in flash-based MP3 players with intermittent high-current bursts. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with fast transient response (<40µs) and integrated LX damping to suppress noise coupling into analog audio paths. Use Value: Achieves >95% efficiency at 100mA load, reducing thermal stress on PCB and eliminating audible switching noise in headphone outputs. |
| PDAs / Palmtops | Portable Terminals |
|
Use Scenario: Providing regulated 3.3V for microcontroller, touchscreen controller, and memory interfaces in battery-powered enterprise data collectors. IC Role / Device Role / Timing Role: Dual-mode configurable regulator (3.3V/5.0V preset or adjustable) with LBI threshold tracking battery voltage decay across temperature. Use Value: Enables accurate low-battery warning across -40°C to +85°C via LBI hysteresis (25mV) and tempco-compensated threshold (±2.2mV/°C). |
Use Scenario: Powering barcode scanner engines, serial interface transceivers, and display drivers in rugged handheld terminals used in logistics and warehousing. IC Role / Device Role / Timing Role: Robust step-up converter with 0.5A current limit, 0.7V minimum input, and 8-pin μMAX package for high-density industrial PCBs. Use Value: Supports cold-start operation from partially discharged batteries and withstands 5s output short-circuit events without latch-up or damage. |
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 |
|---|---|---|---|
| MAX1795EUA | Lower 0.25A current limit; 100mA max output at 3.3V vs. 300mA for MAX1796EUA | Suitable for ultra-low-power sensors or memory backup; insufficient for RF power amplifiers or LCD backlights | Select MAX1795EUA only when load current stays below 120mA at 3.3V and board space allows same μMAX footprint |
| MAX1797EUA | Higher 1A current limit; 400mA max output at 3.3V; identical pinout and control logic | Required for high-current peripherals like camera modules or dual-display drivers; increases inductor/PCB thermal demands | Choose MAX1797EUA when peak load exceeds 300mA; verify inductor saturation rating ≥1A and thermal derating above 70°C |
Compared with MAX1795EUA and MAX1797EUA, the MAX1796EUA strikes a balanced trade-off between output capability (300mA at 3.3V), quiescent current (25μA), and thermal footprint-making it optimal for mid-tier portable devices where cost, size, and performance must coexist without overengineering.
Availability
MAX1796EUA is available at Aetrix Electronics and suitable for wireless handsets, portable digital audio players, and PDAs requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for MAX1796EUA 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 and mixed-signal ICs for power management, sensing, and connectivity in resource-constrained systems.
The MAX1795/MAX1796/MAX1797 family was engineered specifically for ultra-low-power portable electronics, emphasizing sub-1V startup, true output disconnect, and integrated EMI suppression to simplify battery-powered product development.
FAQ
What is the minimum input voltage required for MAX1796EUA to start up?
The MAX1796EUA guarantees startup from 0.85V at +25°C with a 3kΩ load, and operates continuously down to 0.7V after startup. This enables reliable operation from nearly exhausted single-cell alkaline or NiMH batteries, a key requirement for legacy portable audio devices and handheld terminals where battery replacement is infrequent.
How does MAX1796EUA achieve >95% efficiency without an external Schottky diode?
The MAX1796EUA integrates synchronous rectification using an internal P-channel MOSFET that replaces the external Schottky diode. With typical RDS(ON) of 0.27Ω and coordinated gate timing, it eliminates forward-voltage drop losses-directly enabling >95% efficiency at 100mA load and 3.3V output, as verified in Maxim's Typical Operating Characteristics (Figure toc02).
Can the MAX1796EUA output voltage be adjusted, and what is the supported range?
Yes-the MAX1796EUA supports adjustable output from 2.0V to 5.5V using a resistive divider from OUT to FB to GND. The internal 1.24V feedback reference (±0.05V) ensures precise regulation; R2 should be ≤250kΩ to maintain accuracy, and R1 is calculated as R1 = R2 × [(VOUT/1.24) − 1], per Maxim's Application Note.
Does the LBI/LBO comparator remain functional when MAX1796EUA is in shutdown mode?
Yes-the LBI/LBO comparator remains fully operational during MAX1796EUA shutdown, drawing only ≤4μA total. LBI trips at 0.85V (±25mV hysteresis), and LBO provides open-drain output that can be pulled up to 6V independent of VOUT, enabling autonomous battery cutoff without waking the host MCU.
What is the purpose of the LX damping switch in MAX1796EUA, and how does it affect EMI?
The LX damping switch in MAX1796EUA connects a 100–400Ω resistor across the inductor when energy depletes, rapidly dissipating resonant ring-down energy. This reduces high-frequency ringing at the LX node-cutting radiated EMI-without increasing output ripple, as confirmed in Figures 4 and 5 of the datasheet, and eliminates need for external snubber networks.
MAX1796EUA 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 (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 FAQ
1.How can I place an order for MAX1796EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1796EUA 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 reliable?
The price and inventory of MAX1796EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1796EUA is usually 5 days.
3.What payment methods are accepted for MAX1796EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1796EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1796EUA?
MAX1796EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1796EUA 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?
For technical support, including MAX1796EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1796EUA requirements.
6.How does Aetrix verify that MAX1796EUA is sourced from the original manufacturer or authorized distributors?
All MAX1796EUA 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 meets industry standards.
7.What is the process for return or replacement of MAX1796EUA?
All MAX1796EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1796EUA, 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 part is unused and in its original packaging.
Return procedure for MAX1796EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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