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Analog Devices Inc./Maxim Integrated MAX8873TEUK-T
- Part No.:
- MAX8873TEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8873TEUK-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX8873TEUK-T from Maxim Integrated is a low-dropout linear regulator with fixed 3.15V output, delivering up to 120mA from a +2.5V to +6.5V input. It features 55mV dropout at 50mA, 82µA operating supply current independent of load, and Dual Mode™ operation enabling fixed or adjustable output configuration. It is designed for battery-powered portable electronics including cellular phones and cordless telephones.
For engineers reviewing the MAX8873TEUK-T datasheet, MAX8873TEUK-T pinout, MAX8873TEUK-T application, or MAX8873TEUK-T equivalent, key selection criteria include its SOT23-5 package, ±3.5% output accuracy, reverse battery protection, thermal shutdown at +170°C, and compatibility with 1µF ceramic input/output capacitors.
Technical Context
The MAX8873TEUK-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and load-independent quiescent current. Its error amplifier compares a 1.25V bandgap reference against feedback from either internal resistors (for 3.15V fixed mode) or an external SET-pin divider.
Dual Mode™ logic detects SET pin voltage (<60mV for fixed mode) to auto-select feedback path. Shutdown disables all circuitry except SHDN input bias, reducing supply current to 0.1nA; the MAX8874 variant adds active output discharge, but MAX8873TEUK-T does not include this function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.15V ±3.5% - ensures stable rail for 3.3V logic without external resistors. |
| Max Output Current | 120mA - sufficient for baseband processors, RF front-ends, and sensor subsystems in handheld devices. |
| Dropout Voltage | 55mV at 50mA - enables regulation down to VIN = 3.205V, extending usable battery life in Li-ion and alkaline systems. |
| Quiescent Current | 82µA (load-independent) - maintains ultra-low standby power even in dropout or light-load conditions. |
| Input Voltage Range | +2.5V to +6.5V - supports single-cell Li-ion (2.7–4.2V), two-cell alkaline (3.0–3.6V), and regulated 5V rails. |
| Thermal Shutdown | +170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Reverse Battery Protection | Limits reverse current to <1mA if VIN or SHDN falls below GND - protects battery and upstream circuitry during insertion errors. |
Pinout & Package
MAX8873TEUK-T is housed in a RoHS-compliant 5-pin SOT23 package (JEDEC MO-178AA), with the GND pin serving as both electrical return and primary thermal path. Recommended PCB layout uses a large copper pour connected to Pin 2 (GND) for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Regulator input supply | Accepts +2.5V to +6.5V; requires 1µF bypass capacitor to GND for stability and transient response. |
| 2: GND | Ground reference and thermal pad | Must be soldered to large PCB ground plane to maintain θJA ≤140°C/W and prevent thermal shutdown. |
| 3: SET | Feedback mode selector | Tied to GND to enable 3.15V fixed output; floating or >60mV triggers undefined behavior - never left unconnected. |
| 4: SHDN | Active-low shutdown control | Logic low reduces IQ to 0.1nA; connect to IN for always-on operation; no auto-discharge function (MAX8874 only). |
| 5: OUT | Regulated output | Delivers up to 120mA; requires 1µF ceramic capacitor (ESR <0.2Ω) to GND for loop stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ operation | Enables seamless transition between factory-trimmed 3.15V output and adjustable 1.25V–6.5V via external resistor divider on SET pin. |
| P-channel MOSFET pass element | Eliminates base-drive current loss, ensuring 82µA IQ remains constant across load, dropout, and temperature. |
| Reverse battery protection | Internally disconnects circuitry when VIN or SHDN goes negative, limiting reverse current to <1mA without external diodes. |
| Thermal overload protection | Shuts down pass transistor at +170°C junction temperature and auto-restarts after ~20°C cooldown - prevents latch-up or destruction. |
| Low-noise 1µF-compatible design | Stable with 1µF ceramic output capacitors across -40°C to +85°C, avoiding costly tantalum or high-ESR alternatives. |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
|
Use Scenario: Powering RF transceiver ICs and baseband processors during call setup and data transmission. IC Role / Device Role / Timing Role: Primary LDO supplying clean 3.15V rail to sensitive analog/RF sections while rejecting battery ripple. Use Value: 55mV dropout extends talk time by enabling operation until battery drops to 3.205V; 82µA IQ minimizes standby drain. |
Use Scenario: Providing regulated power to digital DSP and handset audio codec in DECT 6.0 handsets. IC Role / Device Role / Timing Role: Fixed-output LDO replacing discrete regulators to reduce BOM count and PCB area. Use Value: ±3.5% output accuracy ensures reliable logic-level compatibility; SOT23-5 footprint fits tight handset layouts. |
| Hand-Held Instruments | PCMCIA Cards |
|
Use Scenario: Supplying microcontroller and precision ADC in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for analog signal chain biasing and reference generation. Use Value: 350µVRMS output noise avoids degrading >12-bit ADC ENOB; reverse battery protection guards against field-replaceable battery swaps. |
Use Scenario: Generating local 3.3V rail from host bus voltage in PC Card peripherals (e.g., modems, memory adapters). IC Role / Device Role / Timing Role: Compact, thermally robust LDO meeting PCMCIA power sequencing and thermal constraints. Use Value: 120mA output supports burst-mode data transfers; thermal shutdown prevents overheating in confined card slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, fixed-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2980AIM5-3.0/NOPB | Fixed 3.0V output, 60mV dropout at 100mA, 95µA IQ, same SOT23-5 pinout. | Lower output voltage limits use in 3.3V logic systems requiring tighter margin; lacks reverse battery protection. | Select when 3.0V rail is required and reverse polarity risk is mitigated externally. |
| MCP1700T-3302E/TT | Fixed 3.3V output, 178mV dropout at 250mA, 1.6µA IQ, SOT23-3 package (no SET/SHDN pins). | Simpler interface but no shutdown or mode selection; lower IQ benefits ultra-low-power sleep modes. | Choose for cost-sensitive, always-on applications where 3.3V output and minimal feature set suffice. |
Compared with LP2980AIM5-3.0/NOPB, MAX8873TEUK-T offers higher output voltage (3.15V vs. 3.0V) and integrated reverse battery protection; compared with MCP1700T-3302E/TT, it provides dual-mode flexibility and thermal shutdown hysteresis, at the cost of higher quiescent current and additional control pins.
Availability
MAX8873TEUK-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 MAX8873TEUK-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 demanding industrial, communications, and consumer applications.
The MAX8873 series targets battery-powered portable equipment, emphasizing ultra-low quiescent current, small footprint, and robust protection features for extended runtime and field reliability.
FAQ
What is the output voltage tolerance of the MAX8873TEUK-T?
The MAX8873TEUK-T has a total output voltage error of ±3.5% over temperature and line/load conditions. This includes initial accuracy, line regulation (±0.011%/mA), load regulation (±0.006%), and thermal drift. At +25°C, the typical output is 3.15V, ranging from 3.04V to 3.26V under full specification limits. This tolerance ensures compatibility with 3.3V logic families while minimizing power loss.
Does the MAX8873TEUK-T support adjustable output voltage?
Yes, the MAX8873TEUK-T supports adjustable output via its SET pin. When the SET pin is connected to an external resistor divider instead of GND, the device operates in adjustable mode with output range 1.25V to 6.5V, governed by VOUT = 1.25V × (1 + R1/R2). The MAX8873TEUK-T datasheet provides design equations and stability guidelines, including recommended R2 = 100kΩ and 10pF–25pF compensation capacitor across R1.
What protection features does the MAX8873TEUK-T include?
The MAX8873TEUK-T integrates short-circuit protection, thermal shutdown (+170°C with 20°C hysteresis), reverse battery protection (<1mA reverse current), and current limiting (~280mA typical). It does not include output auto-discharge - that feature is exclusive to the MAX8874 family. These protections allow safe operation in unattended or harsh environments without external components.
Can the MAX8873TEUK-T be used with ceramic capacitors?
Yes, the MAX8873TEUK-T is fully stable with 1µF ceramic capacitors on both input and output, provided the output capacitor ESR is below 0.2Ω. The device's internal compensation eliminates need for ESR zero, enabling use of low-ESR X5R/X7R MLCCs across -40°C to +85°C. Larger output capacitance (e.g., 10µF) further improves load-transient response and PSRR above 20kHz.
What is the shutdown current of the MAX8873TEUK-T?
The MAX8873TEUK-T draws only 0.1nA typical supply current in shutdown mode, achieved by disabling the pass transistor, reference, error amplifier, and all bias circuits. This ultra-low shutdown current preserves battery charge during extended storage or sleep cycles. Note that SHDN is active-low and must be pulled below 0.4V to activate shutdown; connecting SHDN to IN keeps the device enabled.
MAX8873TEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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 (3.15V)
- 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
MAX8873TEUK-T FAQ
1.How can I place an order for MAX8873TEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8873TEUK-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 MAX8873TEUK-T reliable?
The price and inventory of MAX8873TEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8873TEUK-T is usually 5 days.
3.What payment methods are accepted for MAX8873TEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8873TEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8873TEUK-T?
MAX8873TEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8873TEUK-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 MAX8873TEUK-T?
For technical support, including MAX8873TEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8873TEUK-T requirements.
6.How does Aetrix verify that MAX8873TEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX8873TEUK-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 MAX8873TEUK-T meets industry standards.
7.What is the process for return or replacement of MAX8873TEUK-T?
All MAX8873TEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8873TEUK-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 MAX8873TEUK-T part is unused and in its original packaging.
Return procedure for MAX8873TEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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