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Analog Devices Inc./Maxim Integrated MAX1834EUT
- Part No.:
- MAX1834EUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1834EUT.pdf
- Description:
- IC REG BOOST ADJ 150MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:714
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Product details
Overview
MAX1834EUT 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 output current, and supports adjustable output voltages from +2V to +5.5V. It is used in battery-powered portable instruments requiring backup power management and low-voltage startup.
For engineers reviewing the MAX1834EUT datasheet, MAX1834EUT pinout, MAX1834EUT application, or MAX1834EUT equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters, and real-world application constraints - all specific to the MAX1834EUT SOT23-6 variant with RoHS-compliant #TG16 marking.
Technical Context
The MAX1834EUT implements a current-limited, oscillator-free control scheme using N-channel MOSFET switching (0.5Ω typical RDS(ON)) and internal P-channel synchronous rectification. Output regulation is achieved via feedback at the FB pin with 1.228V reference voltage and ≤20nA bias current.
Unlike MAX1832/MAX1833, the MAX1834EUT does not connect BATT to OUT in shutdown; instead, it maintains ~0.7V drop between them (VBATT − 0.7V), enabling separate backup battery use without leakage. It lacks RST output and uses external resistor divider for output voltage setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Adjustable +2.0V to +5.5V - set by external resistor divider on FB pin; enables flexible rail generation from single-cell sources. |
| Input Voltage Range | +1.5V to +5.5V - supports two alkaline/NiMH cells or one Li+ cell without external LDO pre-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 - minimizes battery drain during light-load operation, extending runtime in always-on monitoring applications. |
| Shutdown Current | <1µA into OUT, 0.001µA into BATT - ensures near-zero standby consumption when disabled. |
| FB Reference Voltage | 1.228V ±0.024V (−40°C to +85°C) - defines accuracy of output regulation; determines resistor ratio for target VOUT. |
| Reverse Battery Protection | Active N-channel MOSFET gate control - blocks −6V reverse input, protecting IC, load, and battery without external components. |
Pinout & Package
MAX1834EUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA, drawing 21-0058I), with exposed pad option U6FH-6* for #TG16 variant. Pin 1 marked by dimple or bevel; body dimensions 2.9mm × 1.6mm × 1.1mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Enable/disable control input | Logic-high enables converter; logic-low disables with <1µA BATT current; includes reverse-battery protection and 1.228V threshold for low-battery cutoff. |
| 2 - BATT | Battery input supply | Main power source connection with integrated reverse-polarity protection; no external diode required. |
| 3 - GND | Analog/digital ground reference | Common return path for internal circuitry, LX switch, and feedback network; must be tied directly to PCB ground plane. |
| 4 - LX | Switch node | Drain of internal N-channel MOSFET and P-channel synchronous rectifier; connects to external inductor; reverse-battery protected. |
| 5 - OUT | Regulated output voltage | Power output terminal; bootstrapped supply for internal circuitry; sense point only in fixed-output variants (not used for feedback in MAX1834EUT). |
| 6 - FB | Feedback input | High-impedance input (≤20nA) referenced to 1.228V; connects to resistor divider from OUT to GND to set output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing board area and improving efficiency to ≥90% at 40mA load. |
| Reverse battery protection | Proprietary N-MOSFET gate control blocks −6V reverse input, protecting IC, load, and battery without added components. |
| Adjustable output (2–5.5V) | Configured via external resistor divider on FB pin; supports multiple system rails from same BOM part. |
| No shutdown output-to-input conduction | Unlike MAX1832/MAX1833, MAX1834EUT isolates OUT from BATT in shutdown (VOUT ≈ VBATT − 0.7V), enabling safe dual-battery backup schemes. |
| Ultra-low quiescent current | 4µA supply current enables >1-year battery life in intermittent-sensing applications powered by two AA cells. |
Applications
| Medical Diagnostic Equipment | Pagers |
|---|---|
|
Use Scenario: Portable handheld glucose meters and pulse oximeters powered by two alkaline cells. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.3V for MCU, sensor interface, and LCD backlight from decaying battery voltage. Use Value: Reverse battery protection prevents damage during field battery swaps; 4µA quiescent current extends shelf life and operational runtime. |
Use Scenario: Two-way alphanumeric pagers with flash memory and RF transceiver. IC Role / Device Role / Timing Role: Adjustable boost converter supplying 2.8V to 3.3V for baseband processor and memory, adapting to varying battery states. Use Value: Shutdown isolation (VOUT ≈ VBATT − 0.7V) allows dedicated Li+ backup cell at OUT without leakage into main battery. |
| Hand-Held Instruments | Remote Wireless Transmitters |
|
Use Scenario: Battery-operated multimeters and thermal imagers with auto-ranging displays. IC Role / Device Role / Timing Role: High-efficiency boost stage delivering 5.0V for analog front-end and ADC reference from 1.5–3.0V input. Use Value: 150mA output capability supports brief high-current bursts during measurement cycles; SOT23-6 footprint saves space in compact enclosures. |
Use Scenario: Wireless sensor nodes transmitting temperature/humidity data every 5 minutes. IC Role / Device Role / Timing Role: Low-quiescent-current boost regulator powering 3.3V RF module and microcontroller during active transmission. Use Value: 90% efficiency at 40mA reduces heat rise and extends coin-cell lifetime; reverse polarity protection avoids field failure during battery replacement. |
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 RTC backup without external diode. | Preferred where main battery must power real-time clock during converter off-time; unsuitable if separate backup battery is used at OUT. | Select MAX1832EUT-T only when BATT→OUT conduction in shutdown is required; otherwise MAX1834EUT offers superior isolation. |
| TPS61022DRVR | Fixed 3.3V output, 2.05V min input, 1.2A switch current, 1.2MHz fixed-frequency PWM control (vs. MAX1834EUT's hysteretic current-mode). | Used in higher-current, noise-sensitive applications like audio codecs; lacks reverse battery protection and shutdown isolation behavior. | Choose TPS61022DRVR for higher output current or fixed-frequency EMI control; avoid if reverse polarity risk or backup isolation is critical. |
Compared with MAX1832EUT-T, MAX1834EUT trades shutdown conduction for backup isolation-critical when secondary batteries feed OUT. Versus TPS61022DRVR, it sacrifices peak current and switching frequency control for ultra-low IQ, reverse protection, and SOT23 size.
Availability
MAX1834EUT is available at Aetrix Electronics and suitable for medical diagnostic equipment, remote wireless transmitters, and hand-held instruments requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for MAX1834EUT 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 MAX1832–MAX1835 family was engineered specifically for ultra-low-power, reverse-polarity-protected boost conversion in space-constrained battery-powered systems - prioritizing quiescent current, protection integrity, and minimal external component count.
FAQ
What is the output voltage range of the MAX1834EUT?
The MAX1834EUT supports an adjustable output voltage range from +2.0V to +5.5V, set by an external resistor divider connected between OUT and GND with the FB pin. The internal feedback reference is 1.228V, and FB bias current is ≤20nA, allowing high-value resistors to minimize battery drain while maintaining regulation accuracy across temperature.
Does the MAX1834EUT provide reverse battery protection?
Yes, the MAX1834EUT includes proprietary reverse battery protection that actively blocks −6V reverse input at the BATT pin using an internal N-channel MOSFET. This protects both the IC and downstream load without requiring external diodes or FETs, and applies to all pins including SHDN and LX.
How does shutdown behavior differ between MAX1834EUT and MAX1832EUT?
In shutdown, the MAX1834EUT does not conduct from OUT to BATT; instead, VOUT ≈ VBATT − 0.7V due to PFET body diode drop. In contrast, MAX1832EUT connects BATT directly to OUT through the inductor and internal PFET, enabling true backup power delivery - a key functional distinction confirmed in the Selector Guide.
What is the maximum load current supported by the MAX1834EUT?
The MAX1834EUT delivers up to 150mA of continuous output current when VBATT = +2V and VOUT = +3.3V, as specified in the Electrical Characteristics table. Performance scales with input voltage: higher VBATT enables greater output current before hitting the 525mA internal switch current limit or 5µs maximum on-time constraint.
Can the MAX1834EUT be used with a single lithium-ion cell?
Yes, the MAX1834EUT operates from +1.5V to +5.5V input, making it compatible with single Li+ cells (2.7–4.2V nominal). Its 1.5V minimum startup voltage and 4µA quiescent current allow reliable operation even as the cell discharges below 3.0V, supporting full utilization of the battery's capacity in portable designs.
MAX1834EUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX1834EUT FAQ
1.How can I place an order for MAX1834EUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1834EUT 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 reliable?
The price and inventory of MAX1834EUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1834EUT is usually 5 days.
3.What payment methods are accepted for MAX1834EUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1834EUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1834EUT?
MAX1834EUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1834EUT 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?
For technical support, including MAX1834EUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1834EUT requirements.
6.How does Aetrix verify that MAX1834EUT is sourced from the original manufacturer or authorized distributors?
All MAX1834EUT 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 meets industry standards.
7.What is the process for return or replacement of MAX1834EUT?
All MAX1834EUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX1834EUT, 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 part is unused and in its original packaging.
Return procedure for MAX1834EUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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