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Analog Devices Inc./Maxim Integrated MAX8877EZK45-T
- Part No.:
- MAX8877EZK45-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK45-T.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX8877EZK45-T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 4.5V output, delivering up to 150mA from 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, and 100µA operating supply current independent of load or dropout condition. Designed for battery-powered portable electronics requiring stable, clean power under tight voltage margins.
For engineers reviewing the MAX8877EZK45-T datasheet, MAX8877EZK45-T pinout, MAX8877EZK45-T application, or MAX8877EZK45-T equivalent, key selection criteria include guaranteed ±1.4% output accuracy over -40°C to +85°C, reverse battery protection, thermal shutdown at 155°C, and compatibility with industry-standard '2982 footprint in thin SOT23-5 package.
Technical Context
The MAX8877EZK45-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates logic-controlled shutdown (10nA quiescent in shutdown), short-circuit and thermal-overload protection (15°C hysteresis), and reverse battery protection limiting reverse current to 1mA. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise, enabling 30µVRMS output noise (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5V ±1.4% over -40°C to +85°C - ensures stable core/peripheral rail without external resistors. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, RF front-ends, or sensor signal chains. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 4.665V input when powering 4.5V loads, extending battery life. |
| Output Noise | 30µVRMS (10Hz–100kHz) - low enough for noise-sensitive analog circuits like ADC references or RF synthesizers. |
| Quiescent Current | 100µA across full load and dropout range - minimizes standby drain in always-on portable systems. |
| Shutdown Current | 10nA logic-controlled shutdown - preserves battery charge during extended sleep modes. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion (2.7–4.2V), dual alkaline (3.0–3.6V), or regulated 5V supplies. |
Pinout & Package
MAX8877EZK45-T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves as both electrical return and thermal path-requires connection to a large PCB copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–6.5V supply; requires ≥1µF bypass capacitor to GND for stability and line-transient immunity. |
| 2 GND | Ground and thermal pad | Electrical reference and primary heat dissipation path; must be soldered to large PCB ground plane. |
| 3 SHDN | Active-low shutdown control | Pulls to GND to enter 10nA shutdown; releases to IN for normal operation; no auto-discharge (MAX8878 only). |
| 4 BP | Bypass for internal reference | Connects 0.01µF ceramic capacitor to reduce reference noise; critical for achieving 30µVRMS output noise. |
| 5 OUT | Regulated output | Delivers up to 150mA at 4.5V; requires ≥1µF (ESR < 0.2Ω) ceramic capacitor for VOUT ≥ 2.5V stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ across all load and dropout conditions. |
| Reverse battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND-prevents damage in miswired battery compartments. |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature and re-enables after 15°C cooldown-enables safe pulsed operation under overload. |
| Current limit | Guaranteed ≥160mA minimum limit protects against sustained short-circuits without device degradation. |
| '2982 pin-compatible footprint | Enables drop-in replacement for legacy regulators in existing layouts-no PCB redesign required. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and RF transceiver bias in GSM/CDMA handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Primary LDO providing clean, tightly regulated 4.5V supply to sensitive analog blocks and digital I/O interfaces. Use Value: 165mV dropout extends usable battery voltage down to 4.665V, increasing talk time by ~8% versus higher-dropout alternatives. |
Use Scenario: Regulating 5V host bus voltage to 4.5V for smart card interface logic and flash memory controllers in PCMCIA Type II slots. IC Role / Device Role / Timing Role: Isolation and voltage translation LDO ensuring logic-level compatibility and noise isolation between host and peripheral. Use Value: 30µVRMS noise prevents bit errors in high-speed serial communication; reverse battery protection safeguards against hot-swap misinsertion. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision ADC reference and op-amp bias in portable multimeters and data loggers powered by AA/AAA batteries. IC Role / Device Role / Timing Role: Low-noise analog supply rail generator maintaining signal integrity for sub-12-bit measurement accuracy. Use Value: Fixed 4.5V output eliminates external resistor network errors; ±1.4% accuracy over temperature ensures calibration stability. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and LCD controller in battery-backed PDAs and organizers. IC Role / Device Role / Timing Role: Always-on LDO maintaining system state during main power-off cycles with ultra-low shutdown current. Use Value: 10nA shutdown current enables >10-year RTC backup on a single CR2032 coin cell; thin SOT23-5 fits compact stacked PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EUK45-T | Same electrical specs and pinout, but in regular (not thin) SOT23-5 package - 0.95mm height vs. 0.8mm for MAX8877EZK45-T. | Suitable where board clearance allows standard SOT23 thickness; identical thermal resistance (θJB = 140°C/W) but lower power density. | Select MAX8877EUK45-T if mechanical stack-up permits standard SOT23; choose MAX8877EZK45-T for ultra-thin handhelds. |
| Torex XC6206P452MR-G | 4.5V fixed LDO, 150mA, 250mV dropout at 150mA, 40µVRMS noise, 1µA IQ - higher dropout and noise, lower quiescent current. | Acceptable where 4.5V rail tolerance is looser and noise sensitivity is lower; lacks reverse battery and thermal hysteresis protection. | Use XC6206P452MR-G only in cost-sensitive, non-critical applications; MAX8877EZK45-T preferred for robustness and noise performance. |
Compared with MAX8877EUK45-T, MAX8877EZK45-T offers thinner profile (0.8mm) for space-constrained designs without sacrificing electrical performance. Against XC6206P452MR-G, MAX8877EZK45-T delivers 90mV lower dropout, 10µVRMS less noise, and integrated protections absent in the Torex part-critical for reliable portable operation.
Availability
MAX8877EZK45-T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for MAX8877EZK45-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, communications, and consumer applications.
The MAX8877/MAX8878 product line was designed specifically for battery-powered portable electronics needing ultra-low noise, low dropout, and minimal quiescent current in miniature packages.
FAQ
What is the output voltage tolerance of the MAX8877EZK45-T over temperature?
The MAX8877EZK45-T guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating temperature range. At +25°C, typical output deviation is within ±0.5%, and the device maintains this tight tolerance due to its trimmed internal resistor divider and stable 1.25V bandgap reference. This ensures reliable operation of 4.5V-dependent peripherals without external calibration.
Does the MAX8877EZK45-T include auto-discharge functionality?
No, the MAX8877EZK45-T does not include auto-discharge. That feature is exclusive to the MAX8878 variant (e.g., MAX8878EZK45-T). When the MAX8877EZK45-T enters shutdown via the SHDN pin, the output remains floating at its last regulated voltage; external circuitry is required to discharge the output if needed.
What is the recommended output capacitor for the MAX8877EZK45-T?
For the MAX8877EZK45-T, a minimum 1µF ceramic capacitor with ESR < 0.2Ω is recommended on the OUT pin. X7R or X5R dielectrics are preferred for stable capacitance across temperature. For improved load-transient response and PSRR, 3.3µF–10µF is acceptable-but avoid Z5U/Y5V types below -10°C without derating.
Can the MAX8877EZK45-T operate from a 2.5V input while regulating 4.5V output?
No-the MAX8877EZK45-T cannot regulate 4.5V output from a 2.5V input. Its minimum input voltage is defined as VOUT + dropout voltage. With 165mV dropout at full load, the absolute minimum input is 4.665V. At light loads, dropout drops to ~55mV, requiring ≥4.555V input-still above 2.5V. Input must always exceed output by the specified dropout margin.
Is the MAX8877EZK45-T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK45-T is fully pin-compatible with the industry-standard '2982 family in the SOT23-5 package. Pin 1 (IN), Pin 2 (GND), Pin 3 (SHDN), Pin 4 (BP), and Pin 5 (OUT) match the '2982 pinout exactly-enabling direct replacement without layout changes, provided thermal and capacitor requirements are met.
MAX8877EZK45-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 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:
- TSOT-23-5
MAX8877EZK45-T FAQ
1.How can I place an order for MAX8877EZK45-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK45-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 MAX8877EZK45-T reliable?
The price and inventory of MAX8877EZK45-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK45-T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK45-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK45-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK45-T?
MAX8877EZK45-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK45-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 MAX8877EZK45-T?
For technical support, including MAX8877EZK45-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK45-T requirements.
6.How does Aetrix verify that MAX8877EZK45-T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK45-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 MAX8877EZK45-T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK45-T?
All MAX8877EZK45-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK45-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 MAX8877EZK45-T part is unused and in its original packaging.
Return procedure for MAX8877EZK45-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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