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Analog Devices Inc./Maxim Integrated MAX8878EZK29+T
- Part No.:
- MAX8878EZK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8878EZK29+T.pdf
- Description:
- IC REG LIN 2.84V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:35,000
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Product details
Overview
MAX8878EZK29+T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 2.84V 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. Designed for battery-powered portable electronics, it integrates reverse-battery protection, thermal shutdown, and auto-discharge functionality.
For engineers reviewing the MAX8878EZK29+T datasheet, MAX8878EZK29+T pinout, MAX8878EZK29+T application, or MAX8878EZK29+T equivalent, key selection criteria include its thin SOT23-5 package, 2.84V ±1.4% accuracy, active output discharge during shutdown, and compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8878EZK29+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 incorporates dedicated circuitry for auto-discharge (exclusive to MAX8878 variants), 10nA logic-controlled shutdown, and thermal shutdown at +155°C with 15°C hysteresis. The BP pin connects to a 0.01µF capacitor forming an 80Hz low-pass filter to suppress reference noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.84V ±1.4% (factory-preset; enables direct replacement without external resistors) |
| Max Output Current | 150mA continuous (supports compact portable loads without external current boosting) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 3.004V, extending battery runtime) |
| Output Noise | 30µVRMS (10Hz–100kHz; suitable for noise-sensitive analog/RF sections) |
| Supply Current | 100µA (load- and dropout-independent; minimizes quiescent drain in standby) |
| Shutdown Current | 10nA (logic-controlled; preserves battery charge during extended sleep modes) |
| Auto-Discharge | Active 300Ω discharge path to GND (ensures rapid, controlled VOUT collapse on SHDN assertion) |
Pinout & Package
MAX8878EZK29+T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for space-constrained PCB layouts and improved thermal performance (θJB = 110°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient immunity |
| 2 GND | Ground reference and thermal path | Serves as primary heat sink; must connect to large copper area or ground plane for thermal management |
| 3 SHDN | Active-low enable/disable control | Pulls <0.4V to enter shutdown (10nA IQ); triggers auto-discharge only on MAX8878 variants |
| 4 BP | Bypass capacitor connection | Connects to 0.01µF ceramic cap to reduce reference noise; forms 80Hz LPF with internal 200kΩ resistor |
| 5 OUT | Regulated output | Delivers 2.84V @ ≤150mA; requires ≥3.3µF ceramic cap (ESR <0.2Ω) for VOUT <2.5V stability |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 300Ω active pull-down path discharges VOUT to GND within microseconds upon SHDN assertion-critical for system-level power sequencing and leakage control |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND-prevents damage in miswired battery compartments |
| P-channel MOSFET pass element | 1.1Ω RDS(ON) eliminates base-drive losses, enabling stable 100µA IQ across all load and dropout conditions |
| Thermal shutdown with hysteresis | Triggers at +155°C and re-enables only after cooling by 15°C-prevents latch-up during sustained overload while allowing safe recovery |
| Preset output accuracy | ±1.4% over -40°C to +85°C ensures reliable voltage margining for 2.84V logic rails without calibration |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver bias circuits and baseband processor I/O rails in dual-mode GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO supplying clean 2.84V to noise-sensitive analog front-end blocks. Use Value: 30µVRMS noise and 63dB PSRR at low frequencies prevent AM modulation of RF carriers and maintain EVM compliance. |
Use Scenario: Providing regulated 2.84V to SRAM and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Standby-power LDO with auto-discharge ensuring rapid VCC ramp-down during card ejection. Use Value: 10nA shutdown current extends host-battery life during card idle; 300Ω discharge prevents floating bus states post-removal. |
| Hand-Held Instruments | Electronic Planners |
Use Scenario: Supplying precision ADC reference buffers and sensor signal conditioning stages in portable multimeters. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for 2.84V reference chain and op-amp biasing. Use Value: ±1.4% output accuracy over temperature maintains measurement linearity; 165mV dropout allows use with partially depleted alkaline cells. |
Use Scenario: Powering real-time clock (RTC) backup domain and low-power microcontroller core in PDAs with coin-cell backup. IC Role / Device Role / Timing Role: Always-on LDO maintaining 2.84V rail during deep-sleep modes with minimal self-discharge. Use Value: 100µA quiescent current independent of load/dropout maximizes coin-cell service life beyond 1 year. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EZK29+T | No auto-discharge; identical pinout, specs, and package; 100µA IQ, same 2.84V output | Lacks active VOUT discharge-unsuitable where rapid rail collapse is required for sequencing or safety | Select when auto-discharge is unnecessary and cost optimization is prioritized |
| MCP1702T-2842E/MB | 250mA max output; 600mV dropout at 250mA; 22µVRMS noise; SOT23-5 package; no auto-discharge | Higher current capability but higher dropout limits usable battery range; no discharge path | Choose for higher load headroom where 2.84V accuracy and ultra-low noise remain critical |
Compared with MAX8878EZK29+T, MAX8877EZK29+T omits auto-discharge but matches all electrical and mechanical specs, while MCP1702T-2842E/MB trades lower noise for higher current and significantly higher dropout-making it less suitable for end-of-battery-life operation in compact portable systems.
Availability
MAX8878EZK29+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for MAX8878EZK29+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 ultra-low-noise, low-quiescent-current regulation in space- and battery-constrained portable electronics-emphasizing dropout efficiency, output accuracy, and integrated protection.
FAQ
What is the exact output voltage tolerance of the MAX8878EZK29+T over temperature?
The MAX8878EZK29+T guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating range, with tighter ±1.4% tolerance at +25°C. This specification applies to the factory-preset 2.84V output and is verified per Maxim's SQC methodology-not interpolated or extrapolated.
Does the MAX8878EZK29+T require external resistors to set the output voltage?
No, the MAX8878EZK29+T does not require external resistors. Its 2.84V output is factory-trimmed and internally fixed using a precision resistor divider. This eliminates layout complexity, reduces bill-of-materials count, and ensures consistent performance without calibration.
How does the auto-discharge function operate in the MAX8878EZK29+T?
When the SHDN pin is pulled low, the MAX8878EZK29+T activates an internal 300Ω switch between OUT and GND, actively discharging the output capacitor. This behavior is exclusive to MAX8878 variants and is confirmed in the Electrical Characteristics table under "Resistance Shutdown Discharge".
What is the recommended output capacitor for the MAX8878EZK29+T given its 2.84V output?
For the MAX8878EZK29+T's 2.84V output, a minimum 3.3µF ceramic capacitor (X5R/X7R dielectric, ESR <0.2Ω) is required on the OUT pin. This value ensures stability across -40°C to +85°C and up to 150mA load, as specified in the Applications Information section.
Is the MAX8878EZK29+T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8878EZK29+T is explicitly pin-compatible with the industry-standard '2982 family, sharing identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), footprint, and functional assignment-enabling drop-in replacement without PCB modification.
MAX8878EZK29+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:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.84V
- 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
MAX8878EZK29+T FAQ
1.How can I place an order for MAX8878EZK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EZK29+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 MAX8878EZK29+T reliable?
The price and inventory of MAX8878EZK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EZK29+T is usually 5 days.
3.What payment methods are accepted for MAX8878EZK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EZK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EZK29+T?
MAX8878EZK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EZK29+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 MAX8878EZK29+T?
For technical support, including MAX8878EZK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EZK29+T requirements.
6.How does Aetrix verify that MAX8878EZK29+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EZK29+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 MAX8878EZK29+T meets industry standards.
7.What is the process for return or replacement of MAX8878EZK29+T?
All MAX8878EZK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EZK29+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 MAX8878EZK29+T part is unused and in its original packaging.
Return procedure for MAX8878EZK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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