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Analog Devices Inc./Maxim Integrated MAX1834EUT+T
- Part No.:
- MAX1834EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1834EUT+T.pdf
- Description:
- IC REG BOOST ADJ 150MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,106
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Product details
Overview
The MAX1834EUT+T from Maxim Integrated is an adjustable-output, high-efficiency step-up DC-DC converter with reverse battery protection, synchronous rectification, and 4μA quiescent current. It operates from +1.5V to +5.5V input, delivers up to 150mA load current, and provides adjustable output voltage from +2V to +5.5V. It is used in handheld instruments and remote wireless transmitters where compact size and battery reversal safety are critical.
For engineers reviewing the MAX1834EUT+T datasheet, MAX1834EUT+T pinout, MAX1834EUT+T application, or MAX1834EUT+T equivalent, key selection criteria include its shutdown behavior (VBATT − 0.7V output), reverse-battery-safe operation, SOT23-6 package footprint, and absence of RST output - distinguishing it from MAX1833/MAX1835 variants.
Technical Context
The MAX1834EUT+T uses a current-limited, oscillatorless control scheme with 5µs maximum on-time and zero-crossing detection for synchronous rectification. Its internal N-channel switch (0.4Ω typ) and P-channel rectifier eliminate external diodes, enabling >90% efficiency at 40mA with +2V input and +3.3V output.
Reverse battery protection is implemented via a proprietary N-channel MOSFET gate control that disconnects BATT from LX and OUT when VBATT is negative. In shutdown, the device isolates OUT from BATT - unlike MAX1832/MAX1833 - resulting in no backup power path and only 0.7V drop across the PFET body diode if external conduction occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Adjustable +2.0V to +5.5V - set via external resistor divider on FB pin; enables flexible rail generation across mixed-voltage systems. |
| Input Voltage Range | +1.5V to +5.5V - supports single Li+ cell, two alkaline/NiMH cells, and wide battery discharge profiles without external regulation. |
| Max Output Current | 150mA at VBATT = +2V, VOUT = +3.3V - sufficient for powering microcontrollers, sensors, and RF transceivers in portable devices. |
| Quiescent Current | 4μA typical - minimizes standby drain, extending battery life in always-on or infrequently active applications. |
| Shutdown Supply Current | <1μA - ensures near-zero battery leakage during inactive periods, critical for long-term storage or backup modes. |
| FB Reference Voltage | 1.228V ±0.02V - high-accuracy feedback threshold enabling precise output regulation over temperature and line/load variations. |
| Reverse Battery Leakage | <10μA at VBATT = −3V - prevents destructive current flow and protects downstream circuitry when batteries are inserted backward. |
Pinout & Package
MAX1834EUT+T is housed in a RoHS-compliant 6-pin SOT23-6 package (3.0mm × 1.7mm × 1.3mm), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-high enable input | Drives internal logic; low state disables switching and reduces supply current to <1μA; includes reverse-battery protection and 1.228V threshold for low-battery cutoff. |
| 2 - BATT | Battery input connection | Primary power source with integrated reverse-polarity protection; withstands −6V to +6V; connects to internal N-channel protection FET. |
| 3 - GND | Analog/digital ground reference | Common return path for all internal circuits; must be tied directly to low-impedance ground plane to minimize noise and ensure stable regulation. |
| 4 - LX | Switch node | Drain of internal N-channel switch and P-channel synchronous rectifier; connects to external inductor; rated for −6V to +1V swing. |
| 5 - OUT | Regulated output voltage | Power rail output; bootstrapped supply for internal circuitry; serves as sense point only in fixed-output variants - not used for feedback in MAX1834EUT+T. |
| 6 - FB | Feedback input | High-impedance (≤20nA) input referenced to 1.228V; connects to resistor divider from OUT to set output voltage; determines regulation accuracy and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectifier | Eliminates need for external Schottky diode, reducing board area by ~1.5mm² and improving efficiency by 5–10% vs. asynchronous designs. |
| Reverse battery protection | Proprietary N-MOSFET gate control blocks −6V reverse input, protecting IC, battery, and load without external components or efficiency penalty. |
| No-RST configuration | Omits open-drain reset output (RST), simplifying design for applications requiring only regulated power - unlike MAX1833/MAX1835 which include RST. |
| Shutdown output isolation | Unlike MAX1832/MAX1833, MAX1834EUT+T does not connect BATT to OUT in shutdown - avoids unintended backup paths and enables separate backup battery use. |
| Ultra-low quiescent current | 4μA operation enables >1-year battery life in low-duty-cycle IoT sensors powered by two AA alkaline cells (2500mAh). |
Applications
| Hand-Held Instruments | Remote Wireless Transmitters |
|---|---|
|
Use Scenario: Portable multimeters and gas detectors powered by two AA alkaline cells with intermittent measurement cycles. IC Role / Device Role / Timing Role: Step-up regulator generating stable +3.3V for MCU, ADC, and display from decaying 1.8–3.2V battery input. Use Value: Reverse battery protection prevents damage during field battery swaps; 4μA quiescent current extends shelf life beyond 2 years. |
Use Scenario: Sub-GHz telemetry nodes deployed in utility metering, transmitting sensor data every 15 minutes. IC Role / Device Role / Timing Role: Supplies regulated +5.0V to RF transceiver during brief transmit bursts while maintaining ultra-low sleep current. Use Value: Adjustable output allows optimization for transceiver VCC tolerance; SOT23-6 footprint fits within 8mm × 8mm module area constraints. |
| Digital Cameras | Battery Backup Systems |
|
Use Scenario: Compact action cameras using single-cell Li+ battery (2.7–4.2V) to power image sensor and processor requiring +2.8V and +3.3V rails. IC Role / Device Role / Timing Role: Generates auxiliary +2.8V rail from main battery; operates down to +1.5V input to support full discharge cycle. Use Value: No external diode needed reduces BOM count and thermal rise; 90% peak efficiency minimizes heat in sealed enclosure. |
Use Scenario: Industrial PLC modules with SRAM and real-time clock requiring uninterrupted +3.3V during main power loss. IC Role / Device Role / Timing Role: Not used for backup path (unlike MAX1832); instead enables clean shutdown sequencing and prevents reverse-current leakage into primary battery. Use Value: Shutdown output isolation (VBATT − 0.7V) avoids parasitic discharge through body diode, preserving backup battery charge for >10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1832EUT+T | Same SOT23-6 package and adjustable output range, but connects BATT to OUT in shutdown (VBATT path), enabling backup power. | Suitable for RTC/microcontroller backup; unsuitable where strict shutdown isolation is required. | Select MAX1832EUT+T when backup power path is needed; MAX1834EUT+T when isolation and lower shutdown leakage are prioritized. |
| TPS61022DSQR | Fixed 3.3V/5.0V outputs only; no adjustable option; higher 2.5μA quiescent current; no reverse battery protection. | Lacks reverse polarity safety and output flexibility; requires external protection diode for battery-reversal scenarios. | Choose TPS61022DSQR only in cost-sensitive, non-safety-critical applications with fixed-voltage needs and robust mechanical battery holders. |
Compared with MAX1832EUT+T, MAX1834EUT+T trades backup capability for superior shutdown isolation and lower reverse leakage; versus TPS61022DSQR, it adds reverse-battery safety and output adjustability at the cost of slightly higher quiescent current.
Availability
MAX1834EUT+T is available at Aetrix Electronics and suitable for hand-held instruments, remote wireless transmitters, and digital cameras requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX1834EUT+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1832–MAX1835 family was designed specifically for ultra-low-power, battery-powered portable equipment needing reverse-polarity safety, minimal board area, and high conversion efficiency without external diodes - targeting medical diagnostics, pagers, and PC cards.
FAQ
What is the output voltage range of the MAX1834EUT+T?
The MAX1834EUT+T features an adjustable output voltage range from +2.0V to +5.5V, set using an external resistor divider connected to the FB pin. The internal feedback reference is precisely 1.228V, enabling accurate regulation across temperature and load conditions. This flexibility allows the MAX1834EUT+T to replace multiple fixed-output regulators in multi-rail systems.
Does the MAX1834EUT+T provide reverse battery protection?
Yes, the MAX1834EUT+T includes proprietary reverse battery protection that blocks current flow when the input battery is connected backward (−6V max). This protection is implemented via an internal N-channel MOSFET that opens under reverse polarity, safeguarding both the IC and downstream circuitry without external components. Leakage remains below 10μA at −3V input.
How does the shutdown behavior of MAX1834EUT+T differ from MAX1832EUT+T?
Unlike the MAX1832EUT+T, which connects BATT to OUT in shutdown to provide backup power, the MAX1834EUT+T isolates OUT from BATT - resulting in an output voltage of approximately VBATT − 0.7V due to the PFET body diode. This eliminates unintended backup paths and reduces shutdown leakage, making MAX1834EUT+T preferable for systems requiring strict power domain separation.
Is there a power-on reset (RST) output on the MAX1834EUT+T?
No, the MAX1834EUT+T does not include an RST output. That feature is present only on MAX1833EUT+T and MAX1835EUT+T variants. The MAX1834EUT+T pinout omits the RST function entirely - pin 6 is dedicated to FB (feedback), and no reset signal is generated or available. Designers requiring reset functionality must select MAX1833EUT+T or add external supervision circuitry.
What package type is used for the MAX1834EUT+T?
The MAX1834EUT+T is supplied in a 6-pin SOT23-6 package (top mark: AAOV), measuring 3.0mm × 1.7mm × 1.3mm. It is RoHS-compliant and compatible with standard surface-mount reflow processes. This miniature footprint supports high-density PCB layouts in space-constrained portable electronics where board area is at a premium.
MAX1834EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 150mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1834EUT+T FAQ
1.How can I place an order for MAX1834EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1834EUT+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 MAX1834EUT+T reliable?
The price and inventory of MAX1834EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1834EUT+T is usually 5 days.
3.What payment methods are accepted for MAX1834EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1834EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1834EUT+T?
MAX1834EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1834EUT+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 MAX1834EUT+T?
For technical support, including MAX1834EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1834EUT+T requirements.
6.How does Aetrix verify that MAX1834EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX1834EUT+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 MAX1834EUT+T meets industry standards.
7.What is the process for return or replacement of MAX1834EUT+T?
All MAX1834EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1834EUT+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 MAX1834EUT+T part is unused and in its original packaging.
Return procedure for MAX1834EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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