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Analog Devices Inc./Maxim Integrated MAX8877EUK33
- Part No.:
- MAX8877EUK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:11,763
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Product details
Overview
MAX8877EUK33 from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 3.3V output, 150mA maximum output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It serves as a precision voltage source in battery-powered portable electronics requiring stable, clean power under varying load and input conditions.
For engineers reviewing the MAX8877EUK33 datasheet, MAX8877EUK33 pinout, MAX8877EUK33 application, or MAX8877EUK33 equivalent, key selection criteria include its SOT23-5 package compatibility with '2982 footprints, reverse battery protection, thermal shutdown behavior, and BP-capacitor–dependent noise performance.
Technical Context
The MAX8877EUK33 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 logic-controlled shutdown (10nA ISHDN), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, and reverse battery protection limiting reverse current to 1mA. The BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with a 0.01µF capacitor to suppress reference noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1.4% (factory-preset; no external feedback required) |
| Max Output Current | 150mA (supports moderate-power RF, logic, and analog blocks) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 3.465V for 3.3V output) |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 10µF; suitable for noise-sensitive ADCs/LNAs) |
| Quiescent Current | 100µA (constant across load and dropout; extends battery life in standby) |
| Shutdown Current | 10nA (logic-low SHDN disables regulator and minimizes system leakage) |
| Input Voltage Range | 2.5V to 6.5V (covers single Li-ion, dual Alkaline/NiMH, and USB-powered systems) |
Pinout & Package
MAX8877EUK33 is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. Pin layout matches industry-standard '2982 footprint for drop-in replacement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression |
| 2 - GND | Ground reference & thermal pad | Electrical return and primary heat dissipation path; must connect to large copper area for thermal management |
| 3 - SHDN | Active-low enable control | Pull low to enter 10nA shutdown; pull high (≥2.0V) or tie to IN for normal operation |
| 4 - BP | Bypass for reference noise reduction | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor reduces output noise by filtering bandgap reference |
| 5 - OUT | Regulated output | Delivers up to 150mA; requires ≥1µF (VOUT ≥2.5V) or ≥3.3µF (VOUT <2.5V) low-ESR ceramic capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ across all load and dropout conditions |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when VIN or SHDN falls below GND-no external diode needed |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables only after cooling 15°C-prevents latch-up during sustained overload |
| Factory-trimmed output accuracy | ±1.4% over -40°C to +85°C ensures reliable logic-level compliance without calibration |
| Low-noise BP pin architecture | Enables 30µVRMS noise with minimal 0.01µF capacitor-reduces BOM count vs. multi-stage filtering |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor core voltage and RF front-end bias rails in GSM/CDMA handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Primary LDO delivering clean 3.3V to noise-sensitive transceivers and low-power microcontrollers. Use Value: 165mV dropout extends usable battery range to ~3.46V; 30µVRMS noise prevents RX desensitization and TX spectral regrowth. | Use Scenario: Providing regulated 3.3V to PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Standby and active-mode power source meeting JEDEC JESD84-A22 voltage tolerance and transient response requirements. Use Value: 10nA shutdown current enables zero-power card ejection detection; '2982 pinout allows legacy board reuse. |
| Hand-Held Instruments | Electronic Planners |
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters and data loggers powered by AA batteries. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source for 16-bit ADCs and real-time clocks. Use Value: ±1.4% output accuracy over temperature eliminates software calibration; reverse battery protection prevents damage during battery swap. | Use Scenario: Regulating 3.3V for SRAM backup, LCD drivers, and touch controller in palm-sized PDAs with coin-cell or rechargeable backup. IC Role / Device Role / Timing Role: Always-on LDO maintaining memory retention and RTC during main power-off cycles. Use Value: 100µA quiescent current enables >1-year coin-cell lifetime; 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 |
|---|---|---|---|
| TPS76333DBVR | 300mA max output, 220mV dropout at 150mA, 35µVRMS noise, 85µA IQ, same SOT23-5 package | Higher current capability but higher dropout and noise; lacks reverse battery protection | Select when higher output current is required and reverse polarity risk is mitigated externally |
| MCP1700T-3302E/MB | 250mA max output, 178mV dropout at 150mA, 30µVRMS noise, 1.6µA IQ (typ), SOT23-3 package | Lower quiescent current but no SHDN pin or BP noise-reduction feature; 3-pin package limits flexibility | Select for ultra-low-power always-on nodes where shutdown control and noise filtering are not critical |
Compared with TPS76333DBVR and MCP1700T-3302E/MB, the MAX8877EUK33 uniquely combines 10nA shutdown, reverse battery protection, and BP-enabled 30µVRMS noise in a pin-compatible '2982 footprint-making it optimal for compact, battery-reversal-prone, noise-sensitive portable designs.
Availability
MAX8877EUK33 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 traceable sourcing.
Supply support for MAX8877EUK33 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 regulation with robust fault protection and minimal external components.
FAQ
What is the exact output voltage tolerance of the MAX8877EUK33 over temperature?
The MAX8877EUK33 guarantees ±1.4% output voltage accuracy over the full operating temperature range of -40°C to +85°C, measured at IOUT = 0.1mA to 120mA. This specification is confirmed in the Electrical Characteristics table of the official datasheet and applies directly to the MAX8877EUK33 variant with its 3.3V preset output.
Does the MAX8877EUK33 include thermal shutdown protection?
Yes, the MAX8877EUK33 includes thermal shutdown protection that activates at +155°C junction temperature and features 15°C hysteresis. When triggered, the pass transistor turns off until the die cools sufficiently, preventing permanent damage during sustained overload or poor PCB thermal design.
Can the MAX8877EUK33 be used with input voltages below 2.5V?
No-the MAX8877EUK33 has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V is not specified, may cause regulation failure, and risks violating functional limits defined for the device.
What capacitor values are required for stable operation of the MAX8877EUK33?
For stable operation, the MAX8877EUK33 requires a minimum 1µF ceramic input capacitor (CIN), a 1µF to 10µF ceramic output capacitor (COUT) with ≤0.2Ω ESR for VOUT ≥2.5V (e.g., 3.3V), and a 0.01µF ceramic capacitor on the BP pin. These values are validated across -40°C to +85°C and up to 150mA load.
Is the MAX8877EUK33 pin-compatible with the industry-standard '2982 regulator?
Yes-the MAX8877EUK33 is explicitly designed as pin-compatible with the industry-standard '2982 family. Its SOT23-5 pinout (IN, GND, SHDN, BP, OUT) matches '2982 layouts, enabling direct replacement without PCB modification, as confirmed in the General Description and Pin Configuration sections of the datasheet.
MAX8877EUK33 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):
- 3.3V
- 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
MAX8877EUK33 FAQ
1.How can I place an order for MAX8877EUK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK33 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 MAX8877EUK33 reliable?
The price and inventory of MAX8877EUK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK33 is usually 5 days.
3.What payment methods are accepted for MAX8877EUK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK33?
MAX8877EUK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK33 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 MAX8877EUK33?
For technical support, including MAX8877EUK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK33 requirements.
6.How does Aetrix verify that MAX8877EUK33 is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK33 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 MAX8877EUK33 meets industry standards.
7.What is the process for return or replacement of MAX8877EUK33?
All MAX8877EUK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK33, 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 MAX8877EUK33 part is unused and in its original packaging.
Return procedure for MAX8877EUK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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