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Analog Devices Inc./Maxim Integrated MAX8878EZK33+T
- Part No.:
- MAX8878EZK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8878EZK33+T.pdf
- Description:
- IC REG LDO 3.3V 0.15A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,477
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Product details
Overview
MAX8878EZK33+T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 3.3V 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.
For engineers reviewing the MAX8878EZK33+T datasheet, MAX8878EZK33+T pinout, MAX8878EZK33+T application, or MAX8878EZK33+T equivalent, key selection criteria include its thin SOT23-5 package, auto-discharge function, ±1.4% output voltage accuracy, and compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8878EZK33+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 thermal shutdown (155°C trip, 15°C hysteresis), reverse battery protection (<1mA reverse current), short-circuit current limiting (160–390mA), and logic-controlled shutdown (10nA ISHDN). The MAX8878 variant adds active output discharge via a 300Ω internal resistance when SHDN is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.4% over -40°C to +85°C - ensures stable core/logic rail without external resistors. |
| Max Output Current | 150mA continuous - sufficient for microcontrollers, RF front-ends, and sensor interfaces in handheld devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 3.465V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets low-noise requirements for ADC references and RF power amplifiers. |
| Quiescent Current | 100µA across load and dropout - maintains efficiency during light-load sleep modes without sacrificing regulation. |
| Shutdown Current | 30µA at +25°C (max 150µA at +85°C) - supports ultra-low-power system-level standby states. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), dual-cell alkaline (3–6V), and USB-powered systems. |
Pinout & Package
MAX8878EZK33+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; bypass with ≥1µF ceramic capacitor to GND for line-transient immunity. |
| 2 - GND | Ground / thermal pad | Reference node and primary heat sink - must be soldered to large PCB ground plane for thermal reliability. |
| 3 - SHDN | Active-low enable/discharge control | Pulls output to GND when low (MAX8878-specific auto-discharge); connect to IN for always-on operation. |
| 4 - BP | Bypass for reference noise reduction | Connects to 0.01µF ceramic capacitor to reduce output noise; start-up time increases with larger values. |
| 5 - OUT | Regulated 3.3V output | Sources up to 150mA; requires ≥1µF (ESR <0.2Ω) ceramic capacitor for stability with VOUT ≥2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 300Ω internal discharge path actively pulls OUT to GND during shutdown - prevents floating rails and enables fast system reset sequencing. |
| P-channel MOSFET pass element | Eliminates base-drive current loss and saturation voltage - delivers consistent 100µA quiescent current across all load and dropout conditions. |
| Reverse battery protection | Limits reverse current to <1mA if VIN or SHDN falls below GND - protects downstream circuitry without external diodes. |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature and re-enables after 15°C cooldown - prevents latch-up during sustained overload. |
| '2982 pin-compatible footprint | Enables drop-in replacement of legacy regulators without PCB redesign - reduces qualification time for cost-sensitive upgrades. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage and RF transceiver bias in compact GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive analog and digital blocks with tight regulation and fast transient response. Use Value: 30µVRMS noise and 12mV load-step deviation ensure minimal clock jitter and ADC SNR degradation in RF signal chains. |
Use Scenario: Providing regulated 3.3V power to memory controllers and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Isolated power domain regulator enabling safe insertion/removal while maintaining bus integrity. Use Value: Reverse battery protection and 10nA shutdown current prevent damage during card swap and extend host battery life. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying main system rail for ARM-based application processors and LCD drivers in sub-200g PDAs. IC Role / Device Role / Timing Role: High-efficiency, low-noise power source supporting dynamic voltage scaling and deep-sleep modes. Use Value: 100µA quiescent current and auto-discharge allow rapid wake/sleep transitions without residual output charge. |
Use Scenario: Delivering stable 3.3V to real-time clock (RTC), SRAM backup, and touch-screen controller in battery-only planners. IC Role / Device Role / Timing Role: Always-on auxiliary regulator maintaining timekeeping and memory retention during main system shutdown. Use Value: ±1.4% output accuracy over temperature ensures RTC timing drift remains within 2 ppm/year specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EZK33+T | No auto-discharge; identical pinout, specs, and package - same quiescent current, noise, and dropout. | Lacks active output discharge - unsuitable where fast rail collapse is required during shutdown. | Select when system does not require controlled output discharge and cost minimization is critical. |
| MCP1700T-3302E/TT | 250mA max output, 1.6µA quiescent current, no BP pin or auto-discharge - SOT23-3 package (3-pin, no SHDN/BP). | Lower IQ but lacks shutdown control and noise-reduction capability - limited to simpler, non-critical rails. | Select only for ultra-low-IQ applications where 3.3V rail is non-critical and no shutdown sequencing is needed. |
Compared with MAX8878EZK33+T, MAX8877EZK33+T offers identical performance except for missing auto-discharge, while MCP1700T-3302E/TT trades noise performance and control flexibility for lower quiescent current and reduced pin count - making it suitable only for less demanding, cost-sensitive applications.
Availability
MAX8878EZK33+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.
Supply support for MAX8878EZK33+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 markets.
The MAX8877/MAX8878 product line was engineered specifically for battery-powered portable electronics - emphasizing ultra-low noise, minimal quiescent current, and robust protection features in miniature packages.
FAQ
What is the output voltage tolerance of MAX8878EZK33+T over temperature and load?
The MAX8878EZK33+T guarantees ±1.4% output voltage accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. At +25°C and 0.1mA load, tolerance tightens to ±1.4% min/max; this specification ensures reliable operation for 3.3V logic families and precision analog circuits without external trimming.
Does MAX8878EZK33+T require an external bypass capacitor on the BP pin?
Yes - MAX8878EZK33+T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting this capacitor increases noise by ~2×; using >0.1µF extends startup time without meaningful noise reduction and is not recommended per the datasheet.
How does the auto-discharge function work in MAX8878EZK33+T?
When SHDN is pulled low, MAX8878EZK33+T activates an internal 300Ω discharge path from OUT to GND, actively collapsing the output voltage. This behavior is unique to the MAX8878 family and absent in MAX8877 variants - enabling deterministic power-down sequencing in multi-rail systems.
Can MAX8878EZK33+T operate with input voltages below 2.5V?
No - MAX8878EZK33+T has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V risks improper regulation, increased dropout, or undefined behavior; it is not characterized or guaranteed for sub-2.5V inputs.
What thermal considerations apply to MAX8878EZK33+T in thin SOT23-5 package?
MAX8878EZK33+T in thin SOT23-5 has θJB = 110°C/W. To maintain TJ ≤150°C at +85°C ambient, maximum power dissipation must stay below 727mW. With 3.3V output and 150mA load, worst-case (VIN=6.5V) power is 480mW - requiring adequate GND pad area and airflow to avoid thermal shutdown.
MAX8878EZK33+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):
- 3.3V
- 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
MAX8878EZK33+T FAQ
1.How can I place an order for MAX8878EZK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EZK33+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 MAX8878EZK33+T reliable?
The price and inventory of MAX8878EZK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EZK33+T is usually 5 days.
3.What payment methods are accepted for MAX8878EZK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EZK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EZK33+T?
MAX8878EZK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EZK33+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 MAX8878EZK33+T?
For technical support, including MAX8878EZK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EZK33+T requirements.
6.How does Aetrix verify that MAX8878EZK33+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EZK33+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 MAX8878EZK33+T meets industry standards.
7.What is the process for return or replacement of MAX8878EZK33+T?
All MAX8878EZK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EZK33+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 MAX8878EZK33+T part is unused and in its original packaging.
Return procedure for MAX8878EZK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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