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Analog Devices Inc./Maxim Integrated MAX8877EUK36
- Part No.:
- MAX8877EUK36
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK36.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:4,065
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Product details
Overview
MAX8877EUK36 from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 3.6V output, delivering up to 150mA from a 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, clean power under tight voltage margins.
For engineers reviewing the MAX8877EUK36 datasheet, MAX8877EUK36 pinout, MAX8877EUK36 application, or MAX8877EUK36 equivalent, key selection criteria include its SOT23-5 regular package, 1.4% output voltage accuracy over temperature, reverse battery protection, and logic-controlled 10nA shutdown mode - all critical for space-constrained, low-power embedded systems.
Technical Context
The MAX8877EUK36 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current losses. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin, enabling precise regulation without external resistors.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection, and reverse battery protection that limits reverse current to 1mA when VIN or SHDN falls below ground. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter, reducing reference noise and enabling 30µVRMS output noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±1.4% over -40°C to +85°C - eliminates need for external feedback network and ensures stable rail for 3.3V/3.6V logic or RF biasing. |
| Max Output Current | 150mA continuous - sufficient for powering microcontrollers, sensors, or RF front-ends in handheld instruments and modems. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 3.765V input, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - low enough to avoid interference in sensitive analog or RF signal chains. |
| Quiescent Current | 100µA across full load and dropout range - maintains efficiency during light-load sleep modes without compromising regulation. |
| Shutdown Current | 10nA logic-controlled shutdown - reduces system standby power to negligible levels in always-on portable devices. |
| Input Voltage Range | 2.5V to 6.5V - supports wide battery chemistries including Li-ion, Li-polymer, NiMH, and alkaline configurations. |
Pinout & Package
MAX8877EUK36 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 optimized for reflow soldering on compact PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient rejection. |
| 2 - GND | Power and thermal ground | Electrical reference and primary heat dissipation path; must connect to large copper area or ground plane. |
| 3 - SHDN | Active-low enable control | Pulls <0.4V to enter 10nA shutdown; connects to IN for always-on operation; no auto-discharge (MAX8878 feature only). |
| 4 - BP | Bypass for reference noise reduction | Connects 0.01µF low-leakage ceramic cap to reduce output noise; start-up time increases if >0.1µF used. |
| 5 - OUT | Regulated 3.6V output | Sources up to 150mA; requires ≥1µF ceramic cap (ESR <0.2Ω) for VOUT ≥2.5V; stable with 1µF–10µF range. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ across load and dropout - extends battery runtime in portable designs. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN goes below GND - prevents damage during incorrect battery insertion in consumer handsets. |
| Thermal shutdown with hysteresis | Triggers at 155°C and resets at 140°C - provides safe, self-recovering fault handling during sustained overload or poor heatsinking. |
| 1.4% output voltage accuracy | Guaranteed over -40°C to +85°C and 0.1mA–120mA load - ensures reliable logic-level compatibility without post-regulation trimming. |
| Industry-standard '2982 pinout | Enables drop-in replacement for legacy regulators in existing layouts - avoids PCB redesign in cost-sensitive production programs. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage and RF transceiver bias rails in GSM/CDMA handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary LDO supplying clean, low-noise 3.6V to sensitive analog sections while maintaining regulation down to end-of-life battery voltage. Use Value: 165mV dropout preserves >20 minutes of operational margin at 3.7V cutoff; 30µVRMS noise avoids desensitization of receiver front-end. |
Use Scenario: Providing regulated 3.6V to memory controllers and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from host bus voltage fluctuations and ESD events. Use Value: Reverse battery protection prevents latch-up during misinsertion; 10nA shutdown enables zero-power card presence detection. |
| Hand-Held Instruments | Modems |
|
Use Scenario: Supplying precision ADC reference and microcontroller I/O rails in battery-operated multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source ensuring measurement repeatability across temperature and battery discharge cycles. Use Value: 1.4% output accuracy over -40°C to +85°C eliminates calibration drift; 100µA IQ enables multi-week battery life in sleep mode. |
Use Scenario: Regulating 3.6V for DSP, line-driver, and analog front-end in DSL/cable modems powered from wall adapters or PoE-derived supplies. IC Role / Device Role / Timing Role: Secondary LDO filtering switching noise from upstream DC/DC converters before analog signal paths. Use Value: 63dB PSRR at low frequencies suppresses adapter ripple; 1µF input cap ensures robust line-transient response per Telcordia GR-1089. |
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 |
|---|---|---|---|
| MAX8878EUK36-T | Includes auto-discharge function (300Ω pull-down on OUT during shutdown); otherwise identical specs and pinout. | Required where rapid output discharge is needed after shutdown (e.g., to meet USB suspend timing or prevent backfeeding). | Select MAX8878EUK36-T only if active discharge is mandatory; MAX8877EUK36-T saves cost and complexity when not required. |
| Torex XC6206P362MR-G | 300mA rated, 250mV dropout at 300mA, 40µVRMS noise, SOT23-5, but lacks reverse battery protection and thermal hysteresis. | Suitable for higher-current, non-battery-reverse-prone applications like industrial sensors with stable input sources. | Choose XC6206P362MR-G only when >150mA load or lower cost outweighs missing protection features and higher noise. |
Compared with MAX8877EUK36, MAX8878EUK36-T adds functional value in shutdown discharge-critical systems, while XC6206P362MR-G trades protection and noise performance for higher current and lower unit cost - making MAX8877EUK36 the optimal balance for battery-powered, safety-conscious designs.
Availability
MAX8877EUK36 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX8877EUK36 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 markets.
The MAX8877/MAX8878 product line was designed specifically for ultra-low-noise, low-quiescent-current regulation in battery-powered portable electronics - prioritizing dropout, noise, and protection over raw current capability.
FAQ
What is the output voltage tolerance of the MAX8877EUK36 over temperature and load?
The MAX8877EUK36 guarantees ±1.4% output voltage accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. At +25°C and 0.1mA load, typical deviation is ±1.0%. This tight tolerance ensures reliable operation of 3.3V-tolerant I/O and analog circuits without external trimming, and is confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX8877EUK36 include reverse battery protection, and how does it behave?
Yes, the MAX8877EUK36 includes integrated reverse battery protection that limits reverse current to ≤1mA when either IN or SHDN falls below GND. This is achieved by disconnecting internal circuitry and parasitic diodes upon polarity detection - preventing damage during incorrect battery installation in handheld devices. The feature operates independently of shutdown state and is validated across the full temperature range.
What capacitor values are required for stable operation of the MAX8877EUK36?
For stable operation, the MAX8877EUK36 requires a minimum 1µF ceramic input capacitor (X5R/X7R dielectric) and a 1µF–10µF ceramic output capacitor with ESR <0.2Ω. For 3.6V output (≥2.5V), 1µF is sufficient; larger values improve transient response and PSRR. A 0.01µF ceramic capacitor must be placed on the BP pin to achieve specified 30µVRMS noise performance.
How does the MAX8877EUK36 differ from the MAX8878EUK36 in functionality?
The MAX8877EUK36 and MAX8878EUK36 share identical electrical specifications, pinout, and package, but the MAX8878EUK36 adds an auto-discharge function: when SHDN is asserted, its internal 300Ω switch actively pulls OUT to GND. The MAX8877EUK36 lacks this feature and holds output voltage during shutdown. This difference is explicitly documented in the Functional Diagram and Pin Description sections of the datasheet.
Is the MAX8877EUK36 compatible with industry-standard '2982 footprints and layouts?
Yes, the MAX8877EUK36 is explicitly designed as pin-compatible with the industry-standard '2982 family. Its SOT23-5 regular package matches the pin assignment (IN, GND, SHDN, BP, OUT), allowing direct substitution in existing designs without PCB modification. This compatibility is stated in the General Description and confirmed in the Pin Configuration diagram of the datasheet.
MAX8877EUK36 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):
- 3.6V
- 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
MAX8877EUK36 FAQ
1.How can I place an order for MAX8877EUK36 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK36 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 MAX8877EUK36 reliable?
The price and inventory of MAX8877EUK36 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK36 is usually 5 days.
3.What payment methods are accepted for MAX8877EUK36?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK36 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK36?
MAX8877EUK36 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK36 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 MAX8877EUK36?
For technical support, including MAX8877EUK36 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK36 requirements.
6.How does Aetrix verify that MAX8877EUK36 is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK36 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 MAX8877EUK36 meets industry standards.
7.What is the process for return or replacement of MAX8877EUK36?
All MAX8877EUK36 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK36, 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 MAX8877EUK36 part is unused and in its original packaging.
Return procedure for MAX8877EUK36:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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