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Analog Devices Inc./Maxim Integrated MAX8878EUK48
- Part No.:
- MAX8878EUK48
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK48.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 150MILLI
- Quantity:
- Payment:
- Shipping:
Inventory:1,432
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Product details
Overview
MAX8878EUK48 from Maxim Integrated is a low-noise, low-dropout linear regulator with 4.8V preset output, delivering up to 150mA from 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, 100µA operating supply current, and integrated auto-discharge for rapid output discharge during shutdown. It serves as a precision power source in battery-powered portable electronics requiring stable, quiet voltage rails.
For engineers reviewing the MAX8878EUK48 datasheet, MAX8878EUK48 pinout, MAX8878EUK48 application, or MAX8878EUK48 equivalent, key selection criteria include its 4.8V output accuracy (±1.4%), SOT23-5 thin package footprint, 10nA shutdown current, reverse battery protection, and compatibility with industry-standard '2982 pinout for drop-in replacement in space-constrained designs.
Technical Context
The MAX8878EUK48 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 thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection, and reverse battery protection limiting reverse current to 1mA. The MAX8878 variant uniquely adds active auto-discharge via a 300Ω internal discharge path from OUT to GND when SHDN is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.8V ±1.4% (factory-preset, no external resistors required) |
| Max Output Current | 150mA continuous (supports handheld instrumentation and modem power rails) |
| Dropout Voltage | 165mV at 150mA (enables operation down to 4.965V input for full 4.8V output) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap; suitable for RF-sensitive analog circuits) |
| Quiescent Current | 100µA (constant across load and dropout; extends battery life in always-on systems) |
| Shutdown Current | 10nA (logic-controlled; enables deep sleep in portable devices) |
| Auto-Discharge | 300Ω internal path (actively pulls OUT to GND in shutdown; prevents floating rail issues) |
Pinout & Package
MAX8878EUK48 is housed in a 5-pin SOT23-5 thin package (JEDEC MO-178AA), optimized for low-profile portable applications. The GND pin serves dual roles: electrical ground reference and primary thermal path-requiring connection 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 immunity |
| 2 GND | Ground reference and thermal pad | Must be soldered to large PCB ground plane to dissipate heat and maintain <110°C/W θJB |
| 3 SHDN | Active-low enable/disable control | Pulled low disables regulator and triggers auto-discharge; pulled high (≥2.0V) enables operation |
| 4 BP | Bypass capacitor terminal | Connects to 0.01µF ceramic cap to reduce reference noise; sets startup time and noise floor |
| 5 OUT | Regulated output | Delivers 4.8V @ up to 150mA; requires ≥1µF (ESR <0.2Ω) ceramic cap for VOUT ≥2.5V |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible with '2982 | Enables direct replacement in legacy designs without PCB layout changes |
| Auto-discharge function | 300Ω internal discharge path ensures rapid, controlled OUT-to-GND discharge during shutdown |
| Reverse battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND-prevents damage in miswired battery packs |
| Stable under wide ESR range | Supports 0.01Ω–1Ω output capacitor ESR across 0–150mA load (verified per Typical Operating Characteristics) |
| Thermal shutdown with hysteresis | Shuts down at 155°C; restarts only after cooling by 15°C-prevents thermal cycling in sustained overload |
Applications
| Cellular Telephone Power Management | PCMCIA Card Voltage Regulation |
|---|---|
Use Scenario: Providing clean, low-noise 4.8V bias to RF front-end ICs and baseband processors in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO supplying critical analog and digital subsystems with tight voltage tolerance and minimal ripple. Use Value: 30µVRMS noise and 165mV dropout extend talk time and maintain signal integrity near battery end-of-life. |
Use Scenario: Regulating 4.8V for PCMCIA Type II card logic and interface circuitry in laptops and industrial terminals. IC Role / Device Role / Timing Role: Standby-power LDO enabling hot-swap compliance and fast wake-up from low-power states. Use Value: 10nA shutdown current and auto-discharge prevent backfeeding and ensure safe insertion/removal. |
| Hand-Held Instrumentation | Palmtop Computer Core Supply |
Use Scenario: Delivering stable 4.8V to precision ADCs, op-amps, and microcontroller cores in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise analog rail generator isolated from noisy digital domains. Use Value: ±1.4% output accuracy and 63dB PSRR at low frequencies ensure measurement fidelity across temperature. |
Use Scenario: Powering 4.8V I/O and memory interfaces in early palmtop PCs where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO supporting burst-mode CPU loads with fast transient response. Use Value: SOT23-5 thin package and 12mV load-step transient (0→50mA) minimize voltage droop during processor 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 |
|---|---|---|---|
| MAX8877EUK48 | No auto-discharge; identical pinout, specs, and package | Suitable where output discharge is handled externally or unnecessary | Select when lower BOM cost is prioritized and system-level discharge is already implemented |
| MCP1703T-4802E/MB | Higher 250mV dropout at 150mA; 1.8µA quiescent current; no reverse battery protection | Targeted at cost-sensitive industrial sensors-not battery-reversal-prone applications | Choose only if thermal margin allows higher dropout and reverse protection is omitted in system design |
Compared with MAX8878EUK48, MAX8877EUK48 lacks auto-discharge but matches all electrical and mechanical specs-making it a functional alternative where rapid rail collapse isn't required. The MCP1703T-4802E/MB trades noise performance and protection features for lower cost and wider input range, but requires careful thermal validation due to higher dropout.
Availability
MAX8878EUK48 is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, hand-held instruments, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8878EUK48 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 designed specifically for battery-powered portable electronics needing ultra-low noise, low quiescent current, and robust protection-targeting cellular handsets, modems, and handheld test equipment.
FAQ
What is the exact output voltage tolerance of the MAX8878EUK48?
The MAX8878EUK48 has a factory-preset output voltage of 4.8V with ±1.4% accuracy over temperature (–40°C to +85°C) and load (0.1mA to 120mA). This specification is guaranteed per the Electrical Characteristics table and applies directly to the MAX8878EUK48 without external trimming or calibration.
Does the MAX8878EUK48 require external resistors to set the output voltage?
No, the MAX8878EUK48 does not require external resistors. Its 4.8V output is internally preset using a precision resistor divider network-confirmed in the Detailed Description and Expanded Ordering Information sections of the datasheet. This eliminates component count and layout complexity.
How does the auto-discharge function operate in the MAX8878EUK48?
The MAX8878EUK48 activates its auto-discharge function when the SHDN pin is driven low: an internal 300Ω switch connects the OUT pin to GND, actively discharging the output capacitor. This behavior is exclusive to the MAX8878 family and is verified in the Pin Description and Typical Operating Characteristics (Figures MAX8877-23).
What is the maximum allowable input voltage for the MAX8878EUK48?
The MAX8878EUK48 supports an absolute maximum input voltage of +7V relative to GND, as specified in the Absolute Maximum Ratings table. However, its recommended operating input range is 2.5V to 6.5V-exceeding 6.5V risks violating safe operating area limits even if below the absolute max.
Can the MAX8878EUK48 be used with ceramic output capacitors?
Yes, the MAX8878EUK48 is fully compatible with ceramic output capacitors. The datasheet specifies a minimum 1µF X7R/X5R ceramic capacitor (ESR <0.2Ω) for VOUT ≥2.5V-including the MAX8878EUK48-and confirms stable operation across temperature and load in the Region of Stable COUT ESR graph (Figure MAX8877-17).
MAX8878EUK48 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 4.8V
- 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
MAX8878EUK48 FAQ
1.How can I place an order for MAX8878EUK48 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK48 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 MAX8878EUK48 reliable?
The price and inventory of MAX8878EUK48 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK48 is usually 5 days.
3.What payment methods are accepted for MAX8878EUK48?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK48 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK48?
MAX8878EUK48 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK48 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 MAX8878EUK48?
For technical support, including MAX8878EUK48 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK48 requirements.
6.How does Aetrix verify that MAX8878EUK48 is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK48 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 MAX8878EUK48 meets industry standards.
7.What is the process for return or replacement of MAX8878EUK48?
All MAX8878EUK48 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK48, 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 MAX8878EUK48 part is unused and in its original packaging.
Return procedure for MAX8878EUK48:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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