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Analog Devices Inc./Maxim Integrated MAX8877EZK50+T
- Part No.:
- MAX8877EZK50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK50+T.pdf
- Description:
- IC REG LINEAR 5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
MAX8877EZK50+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 5.0V preset output, 150mA maximum output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It uses an internal P-channel MOSFET pass device and operates from 2.5V to 6.5V input, serving as a stable power source for battery-powered handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8877EZK50+T datasheet, MAX8877EZK50+T pinout, MAX8877EZK50+T application, or MAX8877EZK50+T equivalent, key selection criteria include dropout voltage under 150mA load, output noise performance in 10Hz–100kHz band, shutdown current ≤100nA, thermal protection at +155°C, and compatibility with thin SOT23-5 layout constraints.
Technical Context
The MAX8877EZK50+T implements a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling low-quiescent-current operation independent of load or dropout condition. Its BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise contribution to output.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown with 15°C hysteresis, and output current limiting (160–390mA range). Unlike the MAX8878 variant, it lacks auto-discharge functionality - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA continuous; supports peak loads without thermal shutdown under proper PCB thermal design |
| Dropout Voltage | 165mV at 150mA (enables operation down to 5.165V input when VOUT = 5.0V) |
| Output Noise | 30µVRMS (10Hz–100kHz); reduced further with 0.01µF BP capacitor and ≥10µF COUT) |
| Quiescent Current | 100µA over full load and dropout range; enables >1-year battery life in 10µA-system standby |
| Shutdown Current | 10nA typical (logic-low SHDN); preserves battery charge during extended sleep modes |
| Thermal Shutdown | Triggers at +155°C junction temperature with 15°C hysteresis; prevents permanent damage during overload |
Pinout & Package
MAX8877EZK50+T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves dual role as electrical ground and thermal path - requires direct connection to large copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply rail | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND near pin for stability and line-transient suppression |
| 2 GND | Ground reference and thermal sink | Must connect to PCB ground plane or large thermal pad; critical for power dissipation and noise immunity |
| 3 SHDN | Active-low enable control | Pull low to enter 10nA shutdown; pull high (≥2.0V) or tie to IN for normal operation; no auto-discharge function |
| 4 BP | Bypass for internal reference | Connect 0.01µF ceramic capacitor to GND; sets 80Hz noise filter corner; larger values increase startup time |
| 5 OUT | Regulated output | Delivers 5.0V @ up to 150mA; requires ≥1µF ceramic capacitor (ESR < 0.2Ω) for VOUT ≥ 2.5V stability |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ across all load and dropout conditions |
| Reverse battery protection | Clamps reverse current to ≤1mA if VIN or SHDN falls below GND; prevents damage in miswired battery compartments |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF BP cap forms dedicated reference noise filter, reducing output noise to 30µVRMS |
| Thermal overload protection | Shuts down at +155°C junction temp and restarts after 15°C cooldown; enables safe operation under sustained overload |
| Preset 5.0V output | ±1.4% accuracy over -40°C to +85°C; eliminates external feedback resistors and associated layout sensitivity |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with variable voltage decay from 3.2V to 2.8V. IC Role / Device Role / Timing Role: Primary 5.0V supply for microcontroller, ADC, and display driver; maintains regulation until battery reaches 5.165V minimum input. Use Value: 165mV dropout extends usable battery life by ~18% versus legacy '2982-compatible regulators; 30µVRMS noise avoids ADC quantization errors. |
Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring clean, fast-turn-on 5.0V rail during insertion. IC Role / Device Role / Timing Role: Local LDO for card logic; activated via host-controlled SHDN signal; must settle within 300µs after enable. Use Value: 300µs shutdown exit delay (with 0.01µF BP cap) meets PCMCIA timing spec; thin SOT23-5 fits tight card-edge height constraints. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Main 5.0V system rail in palm-sized PDAs with Li-ion or alkaline primary battery sources. IC Role / Device Role / Timing Role: Core power regulator feeding CPU I/O, SRAM, and touchscreen controller; must survive reverse battery insertion. Use Value: Reverse battery protection limits fault current to 1mA, preventing catastrophic failure during user battery replacement; 100µA IQ extends standby time beyond 30 days. |
Use Scenario: Low-power electronic organizers using coin-cell or button batteries for multi-year operation. IC Role / Device Role / Timing Role: Always-on 5.0V supply for real-time clock and nonvolatile memory; enabled only during wake cycles via SHDN. Use Value: 10nA shutdown current minimizes battery drain during 99.9% sleep time; ±1.4% output accuracy ensures reliable RTC voltage margin across temperature. |
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 |
|---|---|---|---|
| MAX8877EUK50-T | Same electrical specs, but in regular (not thin) SOT23-5 package; θJB = 140°C/W vs. 110°C/W for EZK version | Less stringent board height requirement; suitable where thermal budget allows higher junction rise | Select when PCB stack height >1.1mm is acceptable and thermal derating margin exists |
| MCP1700T-5002E/TT | 5.0V fixed output, 250mA rating, 6µA IQ, but 170mV dropout at 250mA; no BP pin or reverse-battery protection | Lacks noise optimization path and reverse polarity hardening; suited for cost-sensitive, non-battery-reversal environments | Choose only if ultra-low IQ dominates requirements and reverse-battery risk is eliminated by mechanical design |
Compared with MAX8877EZK50+T, the MAX8877EUK50-T offers identical regulation performance but trades thinner profile for lower thermal efficiency, while the MCP1700T-5002E/TT sacrifices noise control, reverse protection, and dropout margin to achieve nanoscale quiescent current - making it unsuitable for precision battery-powered instrumentation.
Availability
MAX8877EZK50+T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed thin-SOT23 packaging.
Supply support for MAX8877EZK50+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 series was designed specifically for space- and power-constrained portable electronics, delivering low-noise, low-dropout regulation with robust protection features in minimal footprint packages.
FAQ
What is the maximum input voltage rating for the MAX8877EZK50+T?
The MAX8877EZK50+T has an absolute maximum input voltage of +7V relative to GND. However, its operational input range is specified from 2.5V to 6.5V. Exceeding 6.5V may cause excessive power dissipation or violate safe operating area limits, especially at elevated temperatures. Always maintain VIN ≤ 6.5V in normal use to ensure reliability and compliance with datasheet performance guarantees for MAX8877EZK50+T.
Does the MAX8877EZK50+T include auto-discharge functionality during shutdown?
No, the MAX8877EZK50+T does not include auto-discharge. That feature is exclusive to the MAX8878 family variants. When MAX8877EZK50+T enters shutdown (SHDN pulled low), the output goes into high-impedance state but remains floating at its pre-shutdown voltage. External circuitry is required to actively discharge the output if needed. This distinction is confirmed in the Functional Diagram and Pin Description sections of the official MAX8877/MAX8878 datasheet for MAX8877EZK50+T.
What capacitor values are required for stable operation of the MAX8877EZK50+T?
For stable operation, the MAX8877EZK50+T requires a minimum 1µF ceramic input capacitor (CIN) and a minimum 1µF ceramic output capacitor (COUT) with ESR < 0.2Ω for 5.0V output. A 0.01µF ceramic capacitor must be placed on the BP pin. For improved transient response and noise, 3.3µF–10µF COUT is recommended. These values are validated across –40°C to +85°C and up to 150mA load per the "Capacitor Selection and Regulator Stability" section of the MAX8877EZK50+T datasheet.
How does the MAX8877EZK50+T achieve low output noise?
The MAX8877EZK50+T achieves 30µVRMS output noise (10Hz–100kHz) through a dedicated noise-reduction architecture: an internal 200kΩ resistor and external 0.01µF ceramic capacitor on the BP pin form an 80Hz low-pass filter that attenuates bandgap reference noise before it reaches the error amplifier. This design, combined with the P-channel MOSFET's lack of base-current noise, delivers measured noise performance verified in the Typical Operating Characteristics plots for MAX8877EZK50+T.
Is the MAX8877EZK50+T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK50+T is explicitly designed as a pin-compatible upgrade to the industry-standard µA78Lxx and MC78Lxx families (collectively referenced as '2982 in the datasheet). Its SOT23-5 pinout matches IN, GND, SHDN, BP, and OUT assignments exactly, enabling drop-in replacement without PCB modification - provided the thin-profile mechanical clearance is verified. This compatibility is stated in the General Description and Pin Configuration sections of the MAX8877EZK50+T datasheet.
MAX8877EZK50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 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
MAX8877EZK50+T FAQ
1.How can I place an order for MAX8877EZK50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK50+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 MAX8877EZK50+T reliable?
The price and inventory of MAX8877EZK50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK50+T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK50+T?
MAX8877EZK50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK50+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 MAX8877EZK50+T?
For technical support, including MAX8877EZK50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK50+T requirements.
6.How does Aetrix verify that MAX8877EZK50+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK50+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 MAX8877EZK50+T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK50+T?
All MAX8877EZK50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK50+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 MAX8877EZK50+T part is unused and in its original packaging.
Return procedure for MAX8877EZK50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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