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Analog Devices Inc./Maxim Integrated MAX8878EZK30-T
- Part No.:
- MAX8878EZK30-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8878EZK30-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:37,500
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Product details
Overview
MAX8878EZK30-T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 3.0V output, delivering up to 150mA from a 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, and 100µA operating supply current - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.
For engineers reviewing the MAX8878EZK30-T datasheet, MAX8878EZK30-T pinout, MAX8878EZK30-T application, or MAX8878EZK30-T equivalent, key selection criteria include its thin SOT23-5 package, auto-discharge shutdown function, ±1.4% output voltage accuracy, and compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8878EZK30-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current independent of load or dropout condition. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown at +155°C with 15°C hysteresis, and a dedicated BP pin for noise filtering via 0.01µF capacitor. The MAX8878 variant uniquely includes active output discharge during shutdown via a 300Ω internal resistance path to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1.4% over -40°C to +85°C - ensures stable core/peripheral rail in portable systems without external feedback. |
| Max Output Current | 150mA continuous - sufficient for baseband processors, RF front-ends, or sensor subsystems in handheld devices. |
| Dropout Voltage | 165mV at 150mA - extends usable battery life down to ~2.85V input for 3.0V output, critical in single-cell Li-ion applications. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets low-noise requirements for ADC references or RF synthesizer supplies. |
| Quiescent Current | 100µA across full load and dropout range - preserves battery runtime in always-on or sleep-mode circuits. |
| Shutdown Current | 10nA logic-controlled shutdown - enables deep-sleep states in battery-backed real-time clocks or memory retention circuits. |
| Auto-Discharge | Active 300Ω discharge path to GND during SHDN - prevents floating outputs and unintended wake-up in multi-rail systems. |
Pinout & Package
MAX8878EZK30-T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves dual electrical and thermal roles - requires soldering to a large PCB copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 GND | Ground reference and thermal path | Electrical return and primary heat sink - must connect to large PCB ground plane to maintain TJ ≤ +150°C. |
| 3 SHDN | Active-low enable/disable control | Pulls output to GND via internal 300Ω resistor when low; connects to IN for always-on operation. |
| 4 BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor to reduce output noise; start-up time increases with larger values. |
| 5 OUT | Regulated 3.0V output | Sources up to 150mA; requires ≥1µF (ESR < 0.2Ω) ceramic cap for VOUT ≥ 2.5V; supports fast load transients. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge shutdown | Internally discharges OUT to GND within microseconds upon SHDN assertion - eliminates need for external bleed resistors in multi-voltage domain systems. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer handhelds. |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables only after cooling by 15°C - provides robust fault recovery without latch-up in thermally dense layouts. |
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA IQ even in dropout, unlike PNP-based regulators that increase IQ under heavy load or low VIN. |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF BP cap forms 80Hz low-pass filter - reduces reference noise contribution to output, enabling clean analog/RF supply rails. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor I/O and memory interfaces in GSM/CDMA handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying noise-sensitive digital logic and interface circuitry adjacent to RF sections. Use Value: 30µVRMS noise and 165mV dropout extend talk time and prevent data corruption during battery sag near end-of-life. |
Use Scenario: Providing regulated 3.0V to PCMCIA card controllers and SRAM during hot-insertion and low-power suspend modes. IC Role / Device Role / Timing Role: Standby power regulator with 10nA shutdown current and fast wake-up (<300µs exit delay) for instant card readiness. Use Value: Auto-discharge prevents back-driving host logic during card removal, while thin SOT23-5 fits tight card-edge height constraints. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Supplying 3.0V to microcontroller peripherals (LCD drivers, touch controller, flash memory) in palm-sized PDAs. IC Role / Device Role / Timing Role: Main system LDO with integrated thermal and short-circuit protection - operates unattended during extended field use. Use Value: 150mA capacity supports burst-mode LCD refresh; 100µA IQ enables >1-week standby on coin-cell backup. |
Use Scenario: Delivering stable 3.0V to real-time clock (RTC), EEPROM, and low-power MCU in battery-operated organizers. IC Role / Device Role / Timing Role: Always-on regulator with reverse-battery protection - survives accidental polarity reversal during battery replacement. Use Value: ±1.4% output accuracy ensures precise RTC timing; 10nA shutdown current extends 5-year battery life in maintenance-free deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-dropout LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EZK30-T | No auto-discharge function; identical pinout, specs, and package - differs only in shutdown behavior. | Preferred where output discharge is unnecessary and lowest BOM cost is prioritized. | Select MAX8877EZK30-T if system does not require active output discharge during shutdown. |
| MCP1700T-3002E/MB | 300mA rating, 6µA IQ, no BP pin or auto-discharge; SOT23-3 package - smaller footprint but lacks noise optimization and discharge capability. | Suitable for simpler, lower-current applications where ultra-low IQ outweighs noise and discharge needs. | Choose MCP1700T-3002E/MB only when 300mA headroom and 6µA IQ are critical, and noise/discharge are secondary. |
Compared with MAX8878EZK30-T, the MAX8877EZK30-T omits auto-discharge but matches all electrical and thermal specs, while the MCP1700T-3002E/MB trades noise performance and shutdown control for lower quiescent current and higher current rating in a 3-pin package - requiring layout revision and external discharge circuitry if needed.
Availability
MAX8878EZK30-T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX8878EZK30-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 demanding industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was engineered specifically for battery-powered portable electronics - emphasizing ultra-low noise, minimal dropout, and intelligent protection features to maximize runtime and reliability in space- and power-constrained designs.
FAQ
What is the output voltage tolerance of the MAX8878EZK30-T over temperature and load?
The MAX8878EZK30-T delivers a nominal 3.0V output with ±1.4% accuracy across the full -40°C to +85°C operating temperature range and for load currents from 0.1mA to 120mA. This specification is guaranteed by production testing and statistical correlation - ensuring consistent voltage regulation in portable devices exposed to wide ambient conditions and dynamic load profiles.
Does the MAX8878EZK30-T require an external capacitor on the BP pin, and why?
Yes, the MAX8878EZK30-T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. This capacitor works with an internal 200kΩ resistor to form an 80Hz low-pass filter that suppresses reference noise. Omitting it degrades noise performance; using >0.1µF increases startup time without meaningful noise improvement, per Maxim's characterization data.
How does the auto-discharge feature of the MAX8878EZK30-T operate during shutdown?
When the SHDN pin is pulled low, the MAX8878EZK30-T activates an internal 300Ω discharge path from OUT to GND, actively pulling the output voltage to ground within microseconds. This prevents floating outputs that could cause leakage, unintended logic states, or back-powering in multi-rail systems - eliminating the need for external discharge resistors in designs using the MAX8878EZK30-T.
Can the MAX8878EZK30-T be used with input voltages below 2.5V?
No - the MAX8878EZK30-T has a minimum input voltage rating of 2.5V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below 2.5V violates the device's operational limits and may result in unregulated output, increased dropout, or failure to maintain regulation. For sub-2.5V inputs, alternative LDOs with lower VIN minima must be selected.
What thermal considerations apply to the MAX8878EZK30-T in its thin SOT23-5 package?
The MAX8878EZK30-T in thin SOT23-5 has θJB = 110°C/W and a maximum continuous power dissipation of 727mW at +70°C (derating 9.1mW/°C above). To avoid exceeding the +150°C junction limit, the GND pin must be soldered to a large PCB copper area acting as a heatsink. Thermal performance is highly dependent on board layout - insufficient copper will trigger thermal shutdown at lower loads.
MAX8878EZK30-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):
- 3V
- 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
MAX8878EZK30-T FAQ
1.How can I place an order for MAX8878EZK30-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EZK30-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 MAX8878EZK30-T reliable?
The price and inventory of MAX8878EZK30-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EZK30-T is usually 5 days.
3.What payment methods are accepted for MAX8878EZK30-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EZK30-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EZK30-T?
MAX8878EZK30-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EZK30-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 MAX8878EZK30-T?
For technical support, including MAX8878EZK30-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EZK30-T requirements.
6.How does Aetrix verify that MAX8878EZK30-T is sourced from the original manufacturer or authorized distributors?
All MAX8878EZK30-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 MAX8878EZK30-T meets industry standards.
7.What is the process for return or replacement of MAX8878EZK30-T?
All MAX8878EZK30-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EZK30-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 MAX8878EZK30-T part is unused and in its original packaging.
Return procedure for MAX8878EZK30-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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