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Analog Devices Inc./Maxim Integrated MAX8878EUK15+T
- Part No.:
- MAX8878EUK15+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK15+T.pdf
- Description:
- IC REG LINEAR 1.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,494
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Product details
Overview
MAX8878EUK15+T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 1.5V 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, quiet voltage regulation.
For engineers reviewing the MAX8878EUK15+T datasheet, MAX8878EUK15+T pinout, MAX8878EUK15+T application, or MAX8878EUK15+T equivalent, key selection criteria include its auto-discharge function, ±1.4% output accuracy over temperature, reverse battery protection, and SOT23-5 regular package compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8878EUK15+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current across all operating conditions-including dropout-and eliminating base-drive losses inherent in PNP-based regulators. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to OUT.
It integrates logic-controlled shutdown (10nA ISHDN), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, and-uniquely versus MAX8877-a dedicated auto-discharge circuit (300Ω discharge path) that actively pulls OUT to GND during shutdown. The BP pin supports a 0.01µF ceramic capacitor to form an 80Hz low-pass filter reducing reference noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5V preset, ±1.4% accuracy over -40°C to +85°C - ensures stable core/peripheral rail without external resistors. |
| Max Output Current | 150mA continuous - sufficient for RF modules, microcontroller cores, and sensor interfaces in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 1.65V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for ADC references and RF power amplifiers. |
| Supply Current | 100µA operating, 10nA in shutdown - minimizes standby drain, critical for always-on wake-up circuits and long-life battery applications. |
| Protection Features | Reverse battery protection (≤1mA reverse current), thermal shutdown, short-circuit limit (160–390mA) - enables robust deployment in unregulated power environments. |
| PSRR | 63dB at low frequency, rolling off above 10kHz - suppresses ripple from switching converters or noisy DC sources upstream. |
Pinout & Package
MAX8878EUK15+T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual role as electrical ground and thermal path; soldering to a large copper area improves power dissipation capability (θJB = 140°C/W).
| 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 suppression. |
| 2 GND | Ground reference & thermal sink | Electrical return path and primary heat conduction route; must connect to PCB ground plane for thermal performance. |
| 3 SHDN | Active-low enable/disable control | Pulls OUT to GND via internal 300Ω resistor when low - enables fast, controlled power-down in MAX8878 variants only. |
| 4 BP | Bypass for internal reference | Connects to 0.01µF ceramic capacitor to reduce reference noise; determines startup time and output spectral purity. |
| 5 OUT | Regulated output | Delivers 1.5V @ up to 150mA; requires ≥3.3µF output capacitor (low-ESR ceramic) for VOUT < 2.5V per stability guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Active 300Ω discharge path from OUT to GND during SHDN assertion - eliminates residual voltage that could interfere with system reset sequencing. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) with zero gate drive current - maintains 100µA IQ across full load and dropout range, unlike PNP alternatives. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer handhelds. |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF BP cap forms 80Hz low-pass - reduces reference noise contribution, enabling clean analog/RF supply rails. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temp, re-enables after 15°C cooldown - provides safe, self-recovering fault handling under sustained overload. |
Applications
| Cellular Handset Power Management | PCMCIA Card LDO Supply |
|---|---|
Use Scenario: Regulating main 1.5V logic rail in GSM/GPRS handsets powered by single-cell Li-ion (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary low-noise LDO supplying baseband processor core and memory interface. Use Value: 165mV dropout extends usable battery voltage down to 1.65V; 30µVRMS noise prevents digital switching noise from corrupting sensitive RF receive paths. |
Use Scenario: Providing isolated 1.5V supply to PCMCIA card controller ICs in laptop expansion slots. IC Role / Device Role / Timing Role: Standby-power LDO enabling hot-plug detection and card initialization before host enumeration. Use Value: 10nA shutdown current prevents parasitic drain during card ejection; auto-discharge clears residual voltage to meet PCMCIA v2.1 reset timing requirements. |
| Hand-Held Instrument Reference Rail | Electronic Planner System-on-Chip Core |
Use Scenario: Generating precision 1.5V reference for 12-bit SAR ADC in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply decoupled from digital switching noise. Use Value: ±1.4% output accuracy and 30µVRMS noise ensure <0.05% measurement error floor; BP filtering rejects high-frequency interference from display drivers. |
Use Scenario: Powering 1.5V core of ASIC-based electronic planners with real-time clock and flash memory subsystems. IC Role / Device Role / Timing Role: Always-on LDO maintaining RTC and SRAM retention during deep-sleep modes. Use Value: 100µA quiescent current enables >1-year battery life on coin cell; reverse battery protection safeguards against user-insertion errors in field-deployed units. |
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 |
|---|---|---|---|
| MAX8877EUK15+T | No auto-discharge; identical pinout, specs, and package - differs only in absence of active OUT discharge path. | Suitable where controlled power-down is handled externally or unnecessary. | Select MAX8877EUK15+T if system-level discharge is managed by MCU GPIO or external FET. |
| Torex XC6206P152MR-G | 150mA, 1.5V fixed, 250mV dropout at 150mA, 40µVRMS noise, no auto-discharge, SOT23-5. | Lacks reverse battery protection and thermal hysteresis; lower PSRR above 1kHz. | Choose XC6206P152MR-G only for cost-sensitive, non-battery-reverse-prone applications with relaxed noise and protection requirements. |
Compared with MAX8877EUK15+T, the MAX8878EUK15+T adds essential auto-discharge for deterministic reset behavior; versus XC6206P152MR-G, it delivers superior noise performance, integrated reverse-battery safety, and tighter output accuracy-justifying use in mission-critical portable instrumentation and communication devices.
Availability
MAX8878EUK15+T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX8878EUK15+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 quiescent current, low noise, and robust protection - targeting space-constrained, long-life applications where reliability and efficiency are paramount.
FAQ
What is the maximum input voltage rating for MAX8878EUK15+T?
The absolute maximum input voltage for MAX8878EUK15+T is +7V relative to GND. However, the recommended operating input range is 2.5V to 6.5V. Exceeding 6.5V may cause excessive power dissipation or violate thermal limits, especially at high load currents. Operation above 7V risks permanent device damage per Absolute Maximum Ratings.
Does MAX8878EUK15+T require an external output capacitor, and what value is recommended?
Yes, MAX8878EUK15+T requires an external output capacitor for stability. For its 1.5V output, a minimum 3.3µF low-ESR ceramic capacitor is specified. Using X7R or X5R dielectric ensures stable operation across -40°C to +85°C. Lower ESR values improve load-transient response and PSRR, while insufficient capacitance risks oscillation or poor regulation under dynamic loads.
How does the auto-discharge feature of MAX8878EUK15+T operate during shutdown?
When SHDN is pulled low, MAX8878EUK15+T activates an internal 300Ω discharge path between OUT and GND. This actively pulls the output voltage to near-zero within microseconds, ensuring rapid, deterministic power-down. Unlike passive RC decay, this feature guarantees compliance with reset timing requirements in systems like PCMCIA cards and microcontroller-based planners where residual voltage can block proper initialization.
What is the significance of the BP pin on MAX8878EUK15+T, and what capacitor should be used?
The BP (bypass) pin connects to an internal 200kΩ resistor forming a low-pass filter with an external capacitor to reduce reference noise. For optimal noise performance (30µVRMS), a 0.01µF ceramic capacitor is specified. Values above 0.1µF increase startup time without meaningful noise reduction and are not recommended. Z5U/Y5V dielectrics should be avoided due to temperature-dependent leakage and capacitance drift.
Is MAX8878EUK15+T pin-compatible with the industry-standard '2982 regulator?
Yes, MAX8878EUK15+T is explicitly designed as a pin-compatible upgrade to the industry-standard µA78Lxx family (e.g., MC78L15), including the '2982 variant. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), allowing drop-in replacement in existing designs while delivering improved dropout voltage (165mV vs. ~300mV), lower noise, and added features like auto-discharge and reverse battery protection.
MAX8878EUK15+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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:
- SOT-23-5
MAX8878EUK15+T FAQ
1.How can I place an order for MAX8878EUK15+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK15+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 MAX8878EUK15+T reliable?
The price and inventory of MAX8878EUK15+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK15+T is usually 5 days.
3.What payment methods are accepted for MAX8878EUK15+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK15+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK15+T?
MAX8878EUK15+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK15+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 MAX8878EUK15+T?
For technical support, including MAX8878EUK15+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK15+T requirements.
6.How does Aetrix verify that MAX8878EUK15+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK15+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 MAX8878EUK15+T meets industry standards.
7.What is the process for return or replacement of MAX8878EUK15+T?
All MAX8878EUK15+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK15+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 MAX8878EUK15+T part is unused and in its original packaging.
Return procedure for MAX8878EUK15+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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