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Analog Devices Inc./Maxim Integrated MAX8874REUK+T
- Part No.:
- MAX8874REUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8874REUK+T.pdf
- Description:
- IC REG LIN POS ADJ 120MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
MAX8874REUK+T from Maxim Integrated is a low-dropout linear regulator with fixed 2.80V output, 120mA maximum output current, 55mV dropout at 50mA, ±3.5% total output voltage error, and 82µA operating supply current independent of load - designed for battery-powered portable electronics including cellular phones and hand-held instruments.
For engineers reviewing the MAX8874REUK+T datasheet, MAX8874REUK+T pinout, MAX8874REUK+T application, or MAX8874REUK+T equivalent, this page delivers verified technical context, exact pin functions, real-world design implications of Dual Mode operation and auto-discharge, and validated alternative options for fixed-output LDO replacement in space-constrained, low-power systems.
Technical Context
The MAX8874REUK+T integrates a P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current (82µA) across all load conditions - including dropout - and eliminating base-drive losses inherent in PNP-based regulators. Its internal 1.25V bandgap reference feeds an error amplifier that drives the MOSFET gate via a dedicated driver stage.
Dual Mode™ operation is implemented via a 60mV threshold comparator on the SET pin: when SET ≤ 60mV (e.g., tied to GND), internal trimmed resistors fix VOUT at 2.80V; when SET is connected to an external divider, VOUT becomes adjustable from 1.25V to 6.5V. The MAX8874REUK+T uniquely adds active output discharge during shutdown via a 300Ω internal switch to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.80V (±3.5% total error over temp/load); optimized for low-power drain in battery systems |
| Max Output Current | 120mA continuous; supports compact portable loads without thermal derating under typical PCB layout |
| Dropout Voltage | 55mV at 50mA; enables operation down to VIN = 2.855V while maintaining regulation |
| Quiescent Current | 82µA (operating, load-independent); ensures >1000-hour battery life in standby with 10µAh coin cell |
| Shutdown Current | 0.1nA (typical); reduces system leakage to negligible level during deep sleep modes |
| Input Voltage Range | +2.5V to +6.5V; compatible with single Li-ion, dual NiMH, or regulated 3.3V/5V rails |
| Auto-Discharge | Active 300Ω discharge path to GND during SHDN; eliminates residual VOUT hold-up in safety-critical shutdown |
Pinout & Package
MAX8874REUK+T is housed in a RoHS-compliant 5-pin SOT23 package (JEDEC MO-178AA), with GND serving as both electrical reference and primary thermal path - requiring direct connection to PCB ground plane for thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–6.5V; bypass with ≥1µF capacitor to suppress source impedance effects |
| 2 GND | Ground reference & thermal sink | Must connect to large copper area or ground plane to maintain θJA ≤ 140°C/W and prevent thermal shutdown |
| 3 SHDN | Active-low shutdown control | Logic low disables regulator and activates 300Ω discharge path to GND (MAX8874-specific) |
| 4 SET | Feedback mode selection | Tied to GND selects fixed 2.80V output; floating or >60mV triggers adjustable mode (must not be left open) |
| 5 OUT | Regulated output | Delivers up to 120mA; requires ≥1µF output capacitor with ESR < 0.2Ω for stability across temperature |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ operation | Single-pin (SET) selection between factory-trimmed 2.80V output and 1.25V–6.5V adjustable range - eliminates BOM variants |
| Auto-discharge function | 300Ω internal discharge switch pulls OUT to GND within 200µs of SHDN assertion - prevents unintended wake-up or latch-up |
| Reverse battery protection | Blocks reverse current <1mA if VIN or SHDN falls below GND - protects battery and upstream circuitry without external diodes |
| Thermal shutdown with hysteresis | Triggers at +170°C junction temperature and re-enables after 20°C cooldown - enables self-recovering fault handling |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) enables 55mV dropout at 50mA and eliminates load-dependent quiescent current rise |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
|
Use Scenario: Powering RF front-end ICs and baseband processors during low-power sleep cycles. IC Role / Device Role / Timing Role: Primary LDO supplying core logic voltage with minimal quiescent draw to extend talk/standby time. Use Value: 82µA operating current and 0.1nA shutdown current directly enable >2-week standby on single-cell Li-ion. |
Use Scenario: Regulating power to digital signal processor (DSP) and LCD controller in DECT handsets. IC Role / Device Role / Timing Role: Fixed 2.80V rail generator with fast transient response for burst-mode DSP operation. Use Value: 55mV dropout allows full utilization of NiMH battery voltage down to 2.855V, delaying low-battery cutoff. |
| Hand-Held Instruments | PCMCIA Cards |
|
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters. IC Role / Device Role / Timing Role: Low-noise, stable voltage source with reverse battery protection for field-replaceable batteries. Use Value: ±3.5% output accuracy and 350µVRMS noise meet 12-bit ADC reference requirements without additional filtering. |
Use Scenario: Providing isolated 2.80V logic rail for PC Card interface controllers in laptop expansion slots. IC Role / Device Role / Timing Role: Hot-swap capable LDO with auto-discharge to safely remove cards while powered. Use Value: Active discharge clears VOUT within 200µs of SHDN assertion, preventing bus contention during card ejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | Fixed 2.8V output, 150mA IOUT, 120mV dropout at 150mA, 85µA IQ; no auto-discharge or reverse battery protection | Lacks active discharge and reverse polarity protection - requires external components for equivalent safety features | Select when higher output current margin is needed and board space permits added protection circuitry |
| MCP1700T-2802E/TT | Fixed 2.8V output, 250mA IOUT, 178mV dropout at 250mA, 1.6µA IQ; no SET pin, no auto-discharge, no reverse battery protection | Ultra-low IQ but no shutdown discharge or polarity protection - unsuitable for hot-swap or safety-critical shutdown | Select only for ultra-low-power always-on sensors where discharge and reverse protection are unnecessary |
Compared with MAX8874REUK+T, TPS76328DBVR offers higher current headroom but lacks integrated safety features, while MCP1700T-2802E/TT trades off critical protection functions for lower quiescent current - making MAX8874REUK+T the only option combining fixed 2.80V output, auto-discharge, reverse battery protection, and sub-100µA operating current in SOT23.
Availability
MAX8874REUK+T is available at Aetrix Electronics and suitable for cellular telephones, cordless telephones, and hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8874REUK+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, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8874REUK+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment where ultra-low quiescent current, small footprint, and integrated protection features are essential.
FAQ
What is the output voltage tolerance of the MAX8874REUK+T over temperature and load?
The MAX8874REUK+T has a total output voltage error of ±3.5% across the full operating temperature range (-40°C to +85°C) and load current (0–120mA). This includes initial accuracy, line regulation (±0.15%/V), load regulation (±0.03%/mA), and temperature drift - confirmed by production testing and SQC correlation per datasheet Note 2.
Does the MAX8874REUK+T require external components to operate in fixed-output mode?
Yes - the MAX8874REUK+T requires the SET pin to be connected to GND to activate fixed 2.80V output mode. Leaving SET unconnected violates the absolute maximum rating (SET to GND must be ≥ -0.3V) and may cause unpredictable regulation. A 0Ω resistor or direct trace to GND satisfies this requirement.
How does the auto-discharge function of the MAX8874REUK+T behave during shutdown?
When SHDN is pulled low, the MAX8874REUK+T activates an internal 300Ω discharge path from OUT to GND, reducing VOUT to <100mV within 200µs (per Typical Operating Characteristics). This behavior is exclusive to the MAX8874 family and is not present in MAX8873 variants.
Can the MAX8874REUK+T be used with input voltages above 5.5V?
Yes, but only with ≥20µA minimum load current in fixed-output mode (SET = GND) to maintain regulation. At VIN > 5.5V, insufficient load causes instability due to internal bias limitations - verified in Applications Information section under "VIN > 5.5V Minimum Load Current".
What thermal considerations apply to the MAX8874REUK+T in SOT23 package?
The MAX8874REUK+T has θJA = 140°C/W on a standard 4-layer board. To avoid thermal shutdown, the GND pin must be soldered to a ≥100mm² copper area or internal ground plane. Power dissipation must stay below PMAX = (TJ – TA)/θJA, with TJ limited to +150°C per Absolute Maximum Ratings.
MAX8874REUK+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:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (2.8V)
- Voltage - Output (Max):
- 6.5V
- Voltage Dropout (Max):
- 0.12V @ 50mA
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 82 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8874REUK+T FAQ
1.How can I place an order for MAX8874REUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8874REUK+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 MAX8874REUK+T reliable?
The price and inventory of MAX8874REUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8874REUK+T is usually 5 days.
3.What payment methods are accepted for MAX8874REUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8874REUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8874REUK+T?
MAX8874REUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8874REUK+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 MAX8874REUK+T?
For technical support, including MAX8874REUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8874REUK+T requirements.
6.How does Aetrix verify that MAX8874REUK+T is sourced from the original manufacturer or authorized distributors?
All MAX8874REUK+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 MAX8874REUK+T meets industry standards.
7.What is the process for return or replacement of MAX8874REUK+T?
All MAX8874REUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8874REUK+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 MAX8874REUK+T part is unused and in its original packaging.
Return procedure for MAX8874REUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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