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Analog Devices Inc./Maxim Integrated MAX8878EZK50+T
- Part No.:
- MAX8878EZK50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8878EZK50+T.pdf
- Description:
- IC REG LINEAR 5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,980
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Product details
Overview
MAX8878EZK50+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 5.0V preset output, 150mA max output current, 165mV dropout at full load, 30µVRMS output noise, and SOT23-5 thin package. It delivers stable power to portable RF and analog circuitry in battery-powered handheld instruments and modems.
For engineers reviewing the MAX8878EZK50+T datasheet, MAX8878EZK50+T pinout, MAX8878EZK50+T application, or MAX8878EZK50+T equivalent, key selection criteria include shutdown discharge capability, BP-capacitor–dependent noise performance, thermal shutdown hysteresis, reverse battery protection, and compatibility with 1µF/3.3µF output capacitor recommendations for VOUT ≥2.5V.
Technical Context
The MAX8878EZK50+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling low quiescent current (100µA) 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 logic-controlled shutdown (10nA IQ in shutdown), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, reverse battery protection limiting reverse current to 1mA, and - uniquely versus MAX8877 - an active auto-discharge function via a 300Ω internal discharge path from OUT to GND during shutdown.
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; current limit 160–390mA (prevents damage during shorts) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 5.165V; critical for Li-ion end-of-life) |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 10µF; suitable for RF LDO applications) |
| Quiescent Current | 100µA (constant across load, input voltage, and dropout; extends battery life) |
| Shutdown Current | 10nA (logic-low SHDN; MAX8878-specific auto-discharge adds no penalty) |
| Operating Temp | -40°C to +85°C (qualified for industrial handheld and telecom equipment) |
Pinout & Package
SOT23-5 thin package (1.6mm × 1.6mm × 0.95mm height); exposed pad not present; GND pin serves dual role as electrical ground and thermal heatsink - requires soldering to large PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Accepts 2.5V–6.5V; bypass with 1µF ceramic capacitor to GND for stability and line-transient rejection |
| 2 GND | Ground reference and thermal path | Must connect to large PCB ground plane to dissipate up to 727mW (θJB = 110°C/W) and maintain junction temp ≤150°C |
| 3 SHDN | Active-low enable/disable control | Pull low to enter 10nA shutdown; on MAX8878EZK50+T, triggers active OUT-to-GND discharge via 300Ω path |
| 4 BP | Bypass capacitor node for reference noise filtering | Connect 0.01µF ceramic capacitor to reduce output noise; values >0.1µF increase startup delay without benefit |
| 5 OUT | Regulated output terminal | Delivers 5.0V @ up to 150mA; requires 1µF (ESR <0.2Ω) ceramic cap for VOUT ≥2.5V; reverse-battery protected |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on shutdown | 300Ω internal discharge path actively pulls OUT to GND within microseconds - eliminates residual voltage that could disrupt downstream logic sequencing |
| Reverse battery protection | Limits reverse current to ≤1mA when IN or SHDN falls below GND - prevents damage in miswired battery compartments |
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ even in dropout or heavy-load conditions - extends single-cell Li-ion runtime by >15% vs. PNP-based regulators |
| Low-noise BP filter network | Internal 200kΩ resistor + external 0.01µF BP capacitor forms 80Hz low-pass filter - reduces reference noise contribution to total 30µVRMS output noise |
| Thermal shutdown with hysteresis | Shuts down at +155°C; re-enables only after cooling 15°C - prevents thermal oscillation during sustained overload while protecting die integrity |
Applications
| Hand-Held Instruments | Modems |
|---|---|
|
Use Scenario: Portable multimeters and spectrum analyzers powered by single Li-ion cells with tight headroom between battery decay and minimum system voltage. IC Role / Device Role / Timing Role: Primary 5.0V analog supply LDO delivering clean, stable rail to ADC front-ends and op-amp signal chains. Use Value: 165mV dropout preserves usable battery life beyond 3.8V cell voltage; 30µVRMS noise avoids measurement floor degradation in 16-bit ADC systems. |
Use Scenario: External USB or PCI modems requiring regulated 5.0V for PHY layer and analog line drivers under variable AC adapter or host bus power. IC Role / Device Role / Timing Role: Local 5.0V LDO for modem analog subsystem, decoupled from noisy digital domains and shared USB VBUS. Use Value: Reverse battery protection prevents latch-up if external power source is misconnected; 100µA IQ minimizes standby drain during link idle states. |
| PCMCIA Cards | Electronic Planners |
|
Use Scenario: Hot-pluggable PCMCIA cards (e.g., wireless LAN adapters) drawing bursty current from legacy 3.3V/5V slots with poor regulation. IC Role / Device Role / Timing Role: Local 5.0V post-regulator ensuring stable supply to RF transceivers and flash memory interfaces despite slot voltage sag. Use Value: Load transient response limits output droop to ≤12mV during 0–50mA steps - maintains RF PLL lock and memory write integrity. |
Use Scenario: Battery-backed PDAs and electronic organizers using coin-cell or rechargeable Li-ion with aggressive power management. IC Role / Device Role / Timing Role: Always-on 5.0V supply for real-time clock, SRAM backup, and touch controller during deep-sleep modes. Use Value: 10nA shutdown current enables multi-year shelf life; auto-discharge ensures safe reset of attached peripherals upon wake-up. |
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 |
|---|---|---|---|
| MAX8877EZK50+T | No auto-discharge; identical pinout, specs, and package - differs only in missing OUT discharge path | Not suitable where controlled power-down sequencing or zero-residual-VOUT is required | Select MAX8878EZK50+T when downstream logic must be fully discharged before reset; otherwise MAX8877EZK50+T offers same performance at lower cost |
| MCP1700T-5002E/TT | 250mA rated, 175mV dropout at 250mA, 35µVRMS noise, SOT23-3 (no BP or SHDN pins) | Lacks shutdown control and BP noise filtering - requires external enable logic and higher-output-capacitor ESR for stability | Choose MCP1700T-5002E/TT only for cost-sensitive, non-shutdown, non-ultra-low-noise applications where 3-pin simplicity outweighs feature loss |
Compared with MAX8877EZK50+T, the MAX8878EZK50+T adds essential auto-discharge for safe power sequencing but shares identical accuracy, noise, and thermal behavior; versus MCP1700T-5002E/TT, it provides superior noise performance, integrated shutdown, and BP-based noise optimization - justifying its use in precision analog and RF subsystems.
Availability
MAX8878EZK50+T is available at Aetrix Electronics and suitable for hand-held instruments, modems, PCMCIA cards, and electronic planners requiring stable component supply with guaranteed -40°C to +85°C operation and long-term lifecycle support.
Supply support for MAX8878EZK50+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 high-performance analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, communications, and consumer markets.
The MAX8877/MAX8878 product line targets battery-powered portable electronics requiring ultra-low-noise, low-quiescent-current regulation with robust protection features - specifically optimized for space-constrained SOT23-5 thin footprint designs.
FAQ
What is the exact output voltage tolerance of the MAX8878EZK50+T over temperature and load?
The MAX8878EZK50+T guarantees ±1.4% output voltage accuracy across -40°C to +85°C and 0.1mA–120mA load range for 5.0V output. At +25°C and 0.1mA load, tolerance tightens to ±1.4% (not ±1%). This specification ensures reliable logic-level compatibility and analog reference stability in handheld instrumentation and modem designs.
Does the MAX8878EZK50+T require an external BP capacitor, and what happens if it's omitted?
Yes, the MAX8878EZK50+T requires a 0.01µF ceramic capacitor on the BP pin to achieve its specified 30µVRMS output noise. Omitting it increases output noise to ~100µVRMS due to unfiltered reference noise, degrading SNR in sensitive analog circuits like ADC front-ends or RF synthesizers powered by the MAX8878EZK50+T.
How does the auto-discharge function of the MAX8878EZK50+T operate, and what is its resistance value?
The MAX8878EZK50+T activates a dedicated 300Ω internal discharge path from OUT to GND when SHDN is pulled low. This discharges the output capacitor rapidly - typically within tens of microseconds - eliminating residual voltage that could cause unintended wake-up or latch-up in downstream logic. The MAX8877EZK50+T lacks this feature entirely.
Can the MAX8878EZK50+T be used with input voltages below 2.5V?
No. The MAX8878EZK50+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 failure to maintain 5.0V output - especially critical in Li-ion applications where cell voltage drops to 2.8V under load but must stay ≥2.5V for MAX8878EZK50+T functionality.
What thermal derating applies to the MAX8878EZK50+T in its SOT23-5 thin package?
The MAX8878EZK50+T in SOT23-5 thin package has θJB = 110°C/W and a continuous power dissipation limit of 727mW at +70°C ambient, derating by 9.1mW/°C above that temperature. To sustain 150mA at 5.0V output with 3.0V input (150mW dissipation), no derating is needed - but at 6.5V input (225mW dissipation), board-level thermal design must ensure junction temperature stays ≤150°C.
MAX8878EZK50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Product Status:
- Obsolete
- 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
MAX8878EZK50+T FAQ
1.How can I place an order for MAX8878EZK50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EZK50+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 MAX8878EZK50+T reliable?
The price and inventory of MAX8878EZK50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EZK50+T is usually 5 days.
3.What payment methods are accepted for MAX8878EZK50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EZK50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EZK50+T?
MAX8878EZK50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EZK50+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 MAX8878EZK50+T?
For technical support, including MAX8878EZK50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EZK50+T requirements.
6.How does Aetrix verify that MAX8878EZK50+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EZK50+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 MAX8878EZK50+T meets industry standards.
7.What is the process for return or replacement of MAX8878EZK50+T?
All MAX8878EZK50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EZK50+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 MAX8878EZK50+T part is unused and in its original packaging.
Return procedure for MAX8878EZK50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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