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Analog Devices Inc./Maxim Integrated MAX1735EUK30+T
- Part No.:
- MAX1735EUK30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1735EUK30+T.pdf
- Description:
- IC REG LIN NEG ADJ 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,546
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Product details
Overview
MAX1735EUK30+T from Maxim Integrated is a negative-output, low-dropout linear regulator delivering a guaranteed -3.0V output at up to 200mA with 80mV dropout at full load, ±1% output voltage accuracy over temperature, and 85µA quiescent current. It operates from -2.5V to -6.5V input and integrates an N-channel MOSFET pass device for high efficiency in battery-powered portable systems such as mobile phones and wireless data modems.
For engineers reviewing the MAX1735EUK30+T datasheet, MAX1735EUK30+T pinout, MAX1735EUK30+T application, or MAX1735EUK30+T equivalent, key selection criteria include guaranteed -3.0V fixed output, shutdown current below 1nA, thermal overload protection, SOT23-5 package compatibility, and stability with 1µF ceramic output capacitance.
Technical Context
The MAX1735EUK30+T implements Dual Mode™ operation: SET pin grounded selects the factory-trimmed -3.0V output; external resistor divider enables adjustable output from -1.25V to -5.5V. Its internal -1.25V reference feeds an error amplifier driving an N-channel MOSFET pass transistor, enabling low dropout and minimal quiescent current across load and temperature.
Shutdown logic accepts either positive or negative enable signals: |VSHDN| < 0.4V forces shutdown (IQ < 1nA), while |VSHDN| > 1.6V enables regulation. Thermal protection activates at +160°C junction temperature with 15°C hysteresis, cycling output during sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | -3.0V fixed (preset mode); ±1% accuracy over -40°C to +85°C ensures stable bias in precision analog circuits |
| Dropout Voltage | 80mV at -200mA load; enables operation down to -3.08V input when regulating -3.0V, extending battery life in deep-discharge conditions |
| Quiescent Current | 85µA typical at no load; remains near constant across input voltage and load, optimizing standby power in portable devices |
| Shutdown Current | <1nA at VSHDN = 0V; reduces system leakage to negligible levels during sleep modes |
| PSRR | >60dB at 100Hz; suppresses ripple from noisy DC-DC converters or battery supply variations |
| Output Noise | 160µVRMS (10Hz–1MHz); suitable for powering low-noise instrumentation amplifiers without additional filtering |
| Stability | Stable with ≥1µF ceramic COUT; eliminates need for large tantalum or electrolytic capacitors, reducing board area and cost |
Pinout & Package
The MAX1735EUK30+T is housed in a 5-pin SOT23-5 package with exposed pad for thermal dissipation. Pin 2 (IN) serves dual function as input and heatsink; recommended soldering to large PCB copper area improves thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all internal circuitry; must be low-impedance connection to minimize noise coupling |
| IN (Pin 2) | Input supply | Accepts -2.5V to -6.5V; also functions as thermal pad-requires direct connection to PCB ground plane for heat sinking |
| SHDN (Pin 3) | Enable/disable control | Logic input accepting ±1.6V threshold; drives regulator into sub-1nA shutdown state when pulled to GND |
| SET (Pin 4) | Feedback node | Connected to GND for -3.0V fixed output; accepts external resistor divider for adjustable output (VSET = -1.25V reference) |
| OUT (Pin 5) | Regulated output | Delivers up to -200mA; requires ≥1µF ceramic capacitor to GND for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Factory-trimmed -3.0V output or user-adjustable -1.25V to -5.5V via external resistors-enables one BOM for multiple voltage requirements |
| N-Channel MOSFET Pass Device | Eliminates base-drive current; maintains 85µA quiescent current even at full load and in dropout, unlike bipolar-based regulators |
| Thermal Overload Protection | +160°C trip point with 15°C hysteresis prevents permanent damage during short-circuit or high ambient conditions |
| Short-Circuit Tolerance | Withstands indefinite output-to-ground fault; current limiting limits peak short-circuit current to ~515mA |
| Wide Input Range | -2.5V to -6.5V input supports single-cell Li-ion (-2.75V min), dual-cell NiMH (-3.0V), and regulated -5V supplies |
Applications
| Mobile Wireless Data Modems | Instrumentation Amplifiers |
|---|---|
Use Scenario: Powering RF front-end ICs and baseband processors in compact cellular/Wi-Fi modems operating from single Li-ion cells. IC Role / Device Role / Timing Role: Negative voltage regulator providing clean -3.0V bias for GaAsFET drivers and analog signal chains. Use Value: 80mV dropout extends usable battery range by allowing operation down to -3.08V input; 160µVRMS noise avoids SNR degradation in sensitive receive paths. | Use Scenario: Supplying precision op-amps and ADC reference buffers in portable test equipment and sensor interfaces. IC Role / Device Role / Timing Role: Low-noise, high-accuracy negative rail generator for dual-supply analog signal conditioning stages. Use Value: ±1% output accuracy and 60dB PSRR ensure stable offset and gain over temperature and supply variation; 1µF stability simplifies layout. |
| Notebook Computers | PCMCIA Cards |
Use Scenario: Providing auxiliary -3.0V supply for display backlight controllers, audio codecs, or legacy I/O in ultra-thin notebooks. IC Role / Device Role / Timing Role: Compact LDO delivering regulated negative voltage from main system -5V or battery-derived rails. Use Value: SOT23-5 footprint minimizes PCB area; 85µA quiescent current preserves battery runtime during suspend-to-RAM states. | Use Scenario: Generating -3.0V for legacy PCMCIA Type II/III card interface logic and level-shifting circuitry. IC Role / Device Role / Timing Role: Hot-swap compatible negative regulator with fast shutdown recovery and robust ESD tolerance. Use Value: 1nA shutdown current prevents card battery drain when ejected; thermal protection guards against connector misinsertion faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1963AEMS-3.3#TRPBF | Positive-output LDO (3.3V); not pin-compatible; higher 1.1A output current but lacks negative output capability | Only suitable where system architecture permits positive rail generation instead of negative bias | Select only if redesign allows positive-only supply topology and higher current is required |
| TPS7233QPWPRQ1 | Positive-output LDO (3.3V); automotive-grade; same SOT23-5 package but incompatible pinout and polarity | Designed for automotive infotainment; no negative output support or Dual Mode functionality | Not a functional substitute; use only in new designs requiring AEC-Q100 qualification and positive regulation |
Compared with LT1963AEMS-3.3#TRPBF and TPS7233QPWPRQ1, the MAX1735EUK30+T uniquely delivers factory-trimmed -3.0V output in SOT23-5 with Dual Mode adjustability, sub-1nA shutdown, and guaranteed 200mA performance-making it irreplaceable for space-constrained negative-rail applications.
Availability
MAX1735EUK30+T is available at Aetrix Electronics and suitable for mobile wireless data modems, instrumentation amplifiers, and notebook computers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX1735EUK30+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) designs precision analog, mixed-signal, and power management ICs for industrial, communications, computing, and consumer applications.
The MAX1735EUK30+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics requiring high accuracy, ultra-low quiescent current, and compact negative-voltage regulation.
FAQ
What is the exact output voltage tolerance of the MAX1735EUK30+T over its full operating temperature range?
The MAX1735EUK30+T guarantees ±2% output voltage accuracy over the -40°C to +85°C operating temperature range when delivering -100µA to -200mA load current. At +25°C, the tolerance tightens to ±1%. This specification ensures reliable biasing for analog circuits across environmental extremes without requiring external trimming.
Can the MAX1735EUK30+T be used in adjustable mode, and what is the minimum output voltage achievable?
Yes, the MAX1735EUK30+T supports adjustable mode via external resistors connected between OUT and SET pins. With VSET = -1.25V reference, the minimum output voltage is -1.25V. The device regulates stably down to this value when using ≥2.2µF output capacitance, as specified in the datasheet for outputs between -1.25V and -2.5V.
What is the maximum continuous output current the MAX1735EUK30+T can deliver at -4.0V input and -3.0V output?
At -4.0V input and -3.0V output (1.0V differential), the MAX1735EUK30+T can deliver up to -200mA continuously under +70°C ambient conditions with proper PCB thermal design. Derating applies above +70°C: power dissipation is limited to 571mW at +70°C, decreasing by 7.1mW/°C. Full 200mA is guaranteed per datasheet specifications.
Does the MAX1735EUK30+T require special input or output capacitors for stability?
No special capacitors are required. The MAX1735EUK30+T is stable with standard 1µF ceramic capacitors on both IN and OUT pins for -3.0V output. For outputs between -1.25V and -2.5V, ≥2.2µF ceramic is required. ESR should be ≤0.2Ω; low-ESR ceramics meet this easily. Aluminum electrolytics are not recommended due to high ESR and size.
How does the shutdown functionality of the MAX1735EUK30+T behave with negative control signals?
The MAX1735EUK30+T SHDN pin accepts negative voltages: pulling SHDN to GND disables the regulator (IQ < 1nA), while applying VSHDN < -1.6V enables it. This dual-polarity compatibility allows direct interfacing with negative logic systems or op-amp comparators without level-shifting circuitry-simplifying design in mixed-signal environments.
MAX1735EUK30+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Negative
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -6.5V
- Voltage - Output (Min/Fixed):
- -1.25V (-3V)
- Voltage - Output (Max):
- -5.5V
- Voltage Dropout (Max):
- 0.24V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 85 µA
- Current - Supply (Max):
- 125 µA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX1735EUK30+T FAQ
1.How can I place an order for MAX1735EUK30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1735EUK30+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 MAX1735EUK30+T reliable?
The price and inventory of MAX1735EUK30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1735EUK30+T is usually 5 days.
3.What payment methods are accepted for MAX1735EUK30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1735EUK30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1735EUK30+T?
MAX1735EUK30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1735EUK30+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 MAX1735EUK30+T?
For technical support, including MAX1735EUK30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1735EUK30+T requirements.
6.How does Aetrix verify that MAX1735EUK30+T is sourced from the original manufacturer or authorized distributors?
All MAX1735EUK30+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 MAX1735EUK30+T meets industry standards.
7.What is the process for return or replacement of MAX1735EUK30+T?
All MAX1735EUK30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1735EUK30+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 MAX1735EUK30+T part is unused and in its original packaging.
Return procedure for MAX1735EUK30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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