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Analog Devices Inc./Maxim Integrated MAX8877EUK38
- Part No.:
- MAX8877EUK38
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK38.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 150MILLI
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
MAX8877EUK38 from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.8V preset output voltage, 150mA maximum output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8877EUK38 datasheet, MAX8877EUK38 pinout, MAX8877EUK38 application, or MAX8877EUK38 equivalent, key selection criteria include dropout performance at 150mA, ±1.4% output accuracy over temperature, shutdown current of 10nA, reverse battery protection, and SOT23-5 regular package compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8877EUK38 implements a fixed-output LDO architecture using a 1.25V bandgap reference, error amplifier, and internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)). Its feedback network is fully integrated-no external resistors required-enabling factory-preset 3.8V output with ±1.4% accuracy across -40°C to +85°C.
It integrates logic-controlled active-low shutdown (10nA IQ(SHDN)), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, and reverse battery protection limiting reverse current to 1mA. Unlike the MAX8878 variant, it lacks auto-discharge functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.8V fixed, ±1.4% accuracy over -40°C to +85°C - ensures stable rail for 3.3V/3.6V logic without external trimming. |
| Max Output Current | 150mA - sufficient for baseband processors, RF front-ends, and sensor subsystems in handheld devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 3.965V input, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for ADC references and RF power amplifiers. |
| Quiescent Current | 100µA at full load and in dropout - maintains ultra-low standby consumption independent of load or input headroom. |
| Shutdown Current | 10nA - reduces system leakage during deep sleep modes in battery-critical applications. |
| Input Voltage Range | 2.5V to 6.5V - supports single-cell Li-ion (2.7–4.2V), Li-poly, NiMH, and regulated 5V rails. |
Pinout & Package
MAX8877EUK38 is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual function as circuit ground and thermal path; soldering to a large copper area improves power dissipation capability up to 571mW at +70°C ambient.
| 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 immunity. |
| 2 GND | Ground reference and thermal sink | Must connect to PCB ground plane; critical for thermal management and noise rejection. |
| 3 SHDN | Active-low shutdown control | Pull low ≤0.4V to enter 10nA shutdown; pull high ≥2.0V (or tie to IN) for normal operation. |
| 4 BP | Bypass capacitor connection for noise reduction | Connect 0.01µF ceramic cap to GND; forms 80Hz low-pass filter on internal reference, reducing output noise. |
| 5 OUT | Regulated output | Delivers up to 150mA at 3.8V; requires ≥1µF ceramic cap (ESR <0.2Ω) for VOUT ≥2.5V; stable with COUT ESR 0.01–10Ω. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; enables constant 100µA IQ across all load and dropout conditions. |
| Reverse battery protection | Clamps reverse current to ≤1mA when IN or SHDN falls below GND - prevents damage in miswired battery compartments. |
| Thermal shutdown with hysteresis | Shuts down at +155°C junction temp; re-enables only after cooling by 15°C - avoids thermal oscillation during overload. |
| Current limit protection | Guarantees ≥160mA minimum current limit; allows indefinite short-circuit survival without latch-up or degradation. |
| Pin-compatible with '2982 family | Direct drop-in replacement for legacy 5-pin regulators - no PCB redesign needed for upgrade to lower noise and dropout. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage and analog audio codec in GSM/EDGE handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 3.8V LDO delivering clean, low-noise supply to sensitive RF and mixed-signal blocks. Use Value: 165mV dropout extends talk time by enabling regulation until battery drops to 3.965V; 30µVRMS noise prevents AM radio interference and ADC quantization errors. |
Use Scenario: Providing regulated 3.8V rail to PCMCIA card controller and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host 5V bus. Use Value: 10nA shutdown current eliminates standby drain when card is ejected; reverse battery protection safeguards against hot-swap transients. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise 3.8V source for ADC reference and op-amp biasing. Use Value: ±1.4% output accuracy ensures measurement repeatability across temperature; 100µA IQ enables multi-week battery life in low-duty-cycle sampling. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in PDAs and organizers. IC Role / Device Role / Timing Role: Always-on LDO maintaining critical 3.8V rail during main system sleep. Use Value: 10nA shutdown mode preserves coin-cell or main battery for >1 year RTC retention; SOT23-5 footprint fits tight board space constraints. |
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 |
|---|---|---|---|
| MAX8877EUK33 | 3.3V fixed output; identical pinout, noise (30µVRMS), dropout (165mV @150mA), and quiescent current (100µA). | Used where system logic requires 3.3V instead of 3.8V - e.g., interfacing with 3.3V FPGA I/O banks or USB PHYs. | Select when target rail matches 3.3V; verify compatibility with downstream load's absolute maximum ratings. |
| MCP1700T-3802E/MB | 3.8V output, but higher 170mV dropout at 150mA, 65µVRMS noise, and 1.6µA IQ; SOT23-3 package (no BP or SHDN pins). | Lacks shutdown control and BP noise filtering - suitable only for always-on, non-battery-critical applications with relaxed noise specs. | Choose only if board space is constrained and 3.8V rail does not feed noise-sensitive analog circuits or require deep-sleep control. |
Compared with MAX8877EUK38, the MAX8877EUK33 offers identical performance at a different output voltage, while the MCP1700T-3802E/MB trades off noise, dropout, and feature set for lower quiescent current and smaller footprint - making it less suitable for battery-powered, noise-critical designs.
Availability
MAX8877EUK38 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature range (-40°C to +85°C).
Supply support for MAX8877EUK38 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 series belongs to Maxim's precision low-noise LDO portfolio, designed specifically for battery-powered portable electronics where extended runtime, output stability under varying load/temperature, and ultra-low noise are mandatory.
FAQ
What is the output voltage tolerance of the MAX8877EUK38 over temperature?
The MAX8877EUK38 guarantees ±1.4% output voltage accuracy across the full operating temperature range of -40°C to +85°C, with tighter ±1.4% tolerance also specified at +25°C. This is achieved via laser-trimmed internal feedback resistors and a stable 1.25V bandgap reference, ensuring consistent 3.8V regulation for precision analog and digital loads without external calibration.
Does the MAX8877EUK38 support active discharge during shutdown?
No, the MAX8877EUK38 does not include auto-discharge functionality. That feature is exclusive to the MAX8878 variant. When the MAX8877EUK38 enters shutdown (SHDN ≤0.4V), the output remains floating at its last regulated voltage; external circuitry is required to actively discharge the output node if fast turn-off is needed.
What capacitor values are recommended for stable operation of the MAX8877EUK38?
For stable operation, use a 1µF ceramic capacitor (X7R/X5R, ESR <0.2Ω) between IN and GND, and a 1µF ceramic capacitor between OUT and GND (since VOUT = 3.8V ≥2.5V). A 0.01µF ceramic capacitor must be placed between BP and GND to achieve the specified 30µVRMS noise performance. Larger COUT values improve transient response but are not required for stability.
Can the MAX8877EUK38 operate from a 2.7V lithium-ion battery throughout its discharge curve?
Yes - the MAX8877EUK38 operates from 2.5V to 6.5V input and maintains regulation until VIN drops to VOUT + dropout. With 3.8V output and 165mV dropout at 150mA, it sustains regulation down to 3.965V input. While this exceeds the 2.7–3.0V end-of-discharge range of a single Li-ion cell, it remains fully functional across the 3.3–4.2V nominal operating window, delivering full 150mA current with minimal voltage droop.
Is the MAX8877EUK38 pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EUK38 is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), same footprint, and compatible voltage/current specifications - enabling direct replacement without PCB modification while delivering improved dropout (165mV vs. typical 300mV) and lower output noise (30µVRMS vs. ~100µVRMS).
MAX8877EUK38 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):
- 3.8V
- 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
MAX8877EUK38 FAQ
1.How can I place an order for MAX8877EUK38 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK38 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 MAX8877EUK38 reliable?
The price and inventory of MAX8877EUK38 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK38 is usually 5 days.
3.What payment methods are accepted for MAX8877EUK38?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK38 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK38?
MAX8877EUK38 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK38 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 MAX8877EUK38?
For technical support, including MAX8877EUK38 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK38 requirements.
6.How does Aetrix verify that MAX8877EUK38 is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK38 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 MAX8877EUK38 meets industry standards.
7.What is the process for return or replacement of MAX8877EUK38?
All MAX8877EUK38 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK38, 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 MAX8877EUK38 part is unused and in its original packaging.
Return procedure for MAX8877EUK38:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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