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Analog Devices Inc./Maxim Integrated MAX8877EUK29+T
- Part No.:
- MAX8877EUK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK29+T.pdf
- Description:
- IC REG LIN 2.84V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
MAX8877EUK29+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.84V preset output, 150mA maximum output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It serves as a primary voltage regulator in battery-powered portable electronics requiring stable, low-ripple power for RF or analog circuitry.
For engineers reviewing the MAX8877EUK29+T datasheet, MAX8877EUK29+T pinout, MAX8877EUK29+T application, or MAX8877EUK29+T equivalent, key selection criteria include dropout performance at 150mA, shutdown leakage (10nA), reverse battery protection, thermal shutdown behavior, and BP-capacitor–dependent noise reduction.
Technical Context
The MAX8877EUK29+T uses an internal P-channel MOSFET pass transistor with ~1.1Ω RDS(ON), enabling low dropout and eliminating 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.
Regulation stability relies on external capacitors: 1µF CIN, 1µF–10µF COUT (≥1µF ceramic for VOUT ≥2.5V), and 0.01µF CBP to ground - the latter forms an 80Hz low-pass filter that reduces reference noise and achieves 30µVRMS output noise (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.84V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA continuous; current limit activates at ≥160mA (min) |
| Dropout Voltage | 165mV at 150mA load (enables operation down to VIN = 3.00V) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap and 10µF COUT) |
| Quiescent Current | 100µA over full load and dropout range; 85µA at no load |
| Shutdown Current | 10nA logic-controlled shutdown (SHDN pin active-low) |
| Input Voltage Range | 2.5V to 6.5V (supports single Li-ion, dual Alkaline, or regulated DC rails) |
| Thermal Protection | Shuts down at 155°C junction temperature; 15°C hysteresis prevents oscillation |
Pinout & Package
MAX8877EUK29+T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. The package is RoHS-compliant and rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–6.5V; requires 1µF bypass capacitor to GND for stability and line-transient suppression |
| 2 GND | Ground / thermal pad | Electrical reference and primary heat dissipation path; must connect to large copper area or ground plane |
| 3 SHDN | Active-low enable control | Pulls <10nA in shutdown; on MAX8877 (not MAX8878), no auto-discharge - output floats when disabled |
| 4 BP | Bypass reference node | Connects to 0.01µF ceramic capacitor to reduce reference noise; sets output noise floor and startup time |
| 5 OUT | Regulated output | Delivers up to 150mA at 2.84V; requires ≥1µF ceramic capacitor (ESR <0.2Ω) for stability with VOUT ≥2.5V |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling 100µA quiescent current independent of load or dropout condition |
| Reverse battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage in miswired battery compartments |
| Low-noise BP pin architecture | 0.01µF capacitor creates 80Hz RC filter on internal reference, reducing output noise to 30µVRMS without added LDO stages |
| Thermal and short-circuit protection | Auto-shutdown at 155°C junction temp with 15°C hysteresis; survives indefinite output short to GND |
| '2982 pin-compatible footprint | Enables drop-in replacement for legacy industry-standard regulators without PCB redesign |
Applications
| Cellular Handset Power Rail | PCMCIA Card Core Supply |
|---|---|
|
Use Scenario: Powers RF transceiver and baseband ICs in GSM/EDGE handsets where battery voltage drops from 4.2V to 3.0V during discharge. IC Role / Device Role / Timing Role: Primary 2.84V LDO delivering clean, low-noise bias to sensitive analog front-end and PLL circuits. Use Value: 165mV dropout extends usable battery life by >15 minutes at end-of-discharge; 30µVRMS noise avoids phase jitter in local oscillator paths. |
Use Scenario: Supplies regulated 2.84V to memory and controller ICs in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Standby-ready voltage regulator with 10nA shutdown current, enabling fast wake-up and zero-load leakage during card ejection. Use Value: Reverse battery protection prevents latch-up during insertion/removal; '2982 pinout ensures compatibility with legacy card designs. |
| Hand-Held Instrument Reference Supply | Palmtop Computer I/O Periphery |
|
Use Scenario: Provides precision 2.84V reference for 12-bit ADC and op-amp signal chain in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply decoupled from noisy digital domains via BP capacitor filtering. Use Value: ±1.4% output accuracy and <0.04%/mA load regulation minimize gain error; thermal shutdown protects during probe overload events. |
Use Scenario: Powers USB transceivers, SD card interfaces, and touch-screen controllers in palmtop PDAs operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Secondary regulated rail isolated from main system voltage, supporting hot-swap and dynamic power gating. Use Value: 100µA quiescent current minimizes standby drain; 150mA capability handles burst-mode interface activity without brownout. |
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 |
|---|---|---|---|
| MAX8860EUK28+T | 2.8V output (vs. 2.84V); 100mA max output; 25µVRMS noise; same SOT23-5 package and pinout | Lower current capability limits use in high-pulse-load scenarios like modem transmit bursts | Select when 100mA suffices and tighter noise spec is prioritized over margin in dropout or load current |
| MCP1700-2802E/TT | 2.8V output; 250mA max; 17µVRMS noise; 6µA quiescent current; SOT23-3 (no BP or SHDN pins) | Lacks shutdown control and BP-based noise tuning; requires external feedback for fixed output | Choose for ultra-low IQ designs where BP noise optimization and logic-controlled disable are not required |
Compared with MAX8877EUK29+T, MAX8860EUK28+T trades 50mA output headroom and 0.04V output accuracy for lower noise, while MCP1700-2802E/TT sacrifices pin count, shutdown, and BP flexibility to achieve microamp-level quiescent current - making it suitable only for always-on sensor nodes, not interactive portable devices.
Availability
MAX8877EUK29+T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, hand-held instruments, and palmtop computers requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX8877EUK29+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding industrial, communications, and portable applications.
The MAX8877/MAX8878 product line was designed specifically for battery-powered portable electronics needing ultra-low noise, low dropout, and robust protection - targeting cellular handsets, PCMCIA peripherals, and handheld test equipment.
FAQ
What is the exact output voltage of MAX8877EUK29+T and how is it set?
The MAX8877EUK29+T delivers a factory-trimmed 2.84V output with ±1.4% accuracy across temperature and load. This voltage is preset internally using laser-trimmed resistors in the feedback divider - no external components are needed, and the value is encoded in the "29" suffix per Maxim's ordering guide.
Does MAX8877EUK29+T include auto-discharge functionality during shutdown?
No. Auto-discharge is exclusive to the MAX8878 variant. The MAX8877EUK29+T enters 10nA shutdown mode when SHDN is pulled low, but its output remains floating - it does not actively pull OUT to GND. This behavior is confirmed in the Functional Diagram and Pin Description sections of the datasheet.
What capacitor values are required for stable operation of MAX8877EUK29+T?
For stable operation, MAX8877EUK29+T requires a 1µF ceramic input capacitor (CIN) and a minimum 1µF ceramic output capacitor (COUT) with ESR <0.2Ω. Since VOUT = 2.84V ≥ 2.5V, a 1µF–10µF X7R/X5R capacitor is sufficient. A 0.01µF ceramic capacitor must be placed on the BP pin to achieve specified 30µVRMS noise performance.
How does MAX8877EUK29+T protect against reverse battery connection?
MAX8877EUK29+T monitors polarity on both IN and SHDN pins. If either falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - preventing damage to the IC or downstream components. This protection operates independently of enable state and requires no external diodes.
Is MAX8877EUK29+T pin-compatible with the industry-standard '2982 regulator?
Yes. MAX8877EUK29+T uses the identical 5-pin SOT23-5 pinout as the industry-standard µA78Lxx and '2982-family regulators. Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN, Pin 4 is BP, and Pin 5 is OUT - enabling direct replacement without layout changes in existing designs.
MAX8877EUK29+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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.9V
- 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
MAX8877EUK29+T FAQ
1.How can I place an order for MAX8877EUK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK29+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 MAX8877EUK29+T reliable?
The price and inventory of MAX8877EUK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK29+T is usually 5 days.
3.What payment methods are accepted for MAX8877EUK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK29+T?
MAX8877EUK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK29+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 MAX8877EUK29+T?
For technical support, including MAX8877EUK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK29+T requirements.
6.How does Aetrix verify that MAX8877EUK29+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK29+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 MAX8877EUK29+T meets industry standards.
7.What is the process for return or replacement of MAX8877EUK29+T?
All MAX8877EUK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK29+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 MAX8877EUK29+T part is unused and in its original packaging.
Return procedure for MAX8877EUK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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