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Analog Devices Inc./Maxim Integrated MAX8877EZK33
- Part No.:
- MAX8877EZK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
The MAX8877EZK33 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 - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.
For engineers reviewing the MAX8877EZK33 datasheet, MAX8877EZK33 pinout, MAX8877EZK33 application, or MAX8877EZK33 equivalent, key selection criteria include its SOT23-5 thin-package footprint, 10nA shutdown current, reverse-battery protection, thermal shutdown at +155°C, and BP-capacitor–enabled noise filtering - all critical for space-constrained, long-life, low-power systems.
Technical Context
The MAX8877EZK33 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, enabling precise regulation without external resistors.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown with 15°C hysteresis, and short-circuit current limiting (160–390mA). The BP pin connects to a 0.01µF capacitor forming an 80Hz low-pass filter that reduces reference noise - directly contributing to its 30µVRMS output noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA (supports microcontrollers, RF modules, and sensor interfaces) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 3.465V for 3.3V output) |
| Output Noise | 30µVRMS (10Hz–100kHz; enables clean analog/RF supply rails) |
| Quiescent Current | 100µA (load- and dropout-independent; extends battery life) |
| Shutdown Current | 10nA (logic-controlled active-low SHDN; preserves battery during sleep) |
| Input Voltage Range | 2.5V to 6.5V (compatible with single Li-ion, dual Alkaline, or regulated 5V rails) |
Pinout & Package
MAX8877EZK33 is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for PCB area and thermal performance in portable devices. The GND pin serves as both electrical return and primary heat path - requires connection to a large copper pour or ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–6.5V; bypass with ≥1µF ceramic capacitor to GND for stability and line-transient immunity |
| 2 GND | Ground / thermal pad | Electrical reference and primary heat dissipation path; must connect to large copper area |
| 3 SHDN | Active-low shutdown control | Pulls to GND to enter 10nA shutdown; on MAX8877 (not MAX8878), no auto-discharge function |
| 4 BP | Bypass for reference noise | Connects to 0.01µF ceramic capacitor to reduce output noise by filtering 1.25V reference |
| 5 OUT | Regulated output | Delivers up to 150mA at 3.3V; bypass with ≥1µF (ESR <0.2Ω) ceramic capacitor for VOUT ≥2.5V |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA quiescent current across all load and dropout conditions |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when VIN or SHDN falls below GND - prevents damage in miswired battery compartments |
| Thermal shutdown with hysteresis | Shuts down at +155°C junction temperature; re-enables only after cooling by 15°C - prevents thermal runaway during sustained overload |
| BP pin noise filtering | 0.01µF capacitor at BP creates 80Hz low-pass filter on internal 1.25V reference - directly enables 30µVRMS output noise spec |
| '2982 pinout compatibility | Direct replacement for industry-standard regulators in existing SOT23-5 layouts - no PCB redesign needed |
Applications
| Cellular Handset Power Rail | PCMCIA Card LDO Supply |
|---|---|
|
Use Scenario: Providing clean 3.3V bias to baseband processor and RF transceiver in GSM/CDMA handsets with single-cell Li-ion input. IC Role / Device Role / Timing Role: Primary voltage regulator delivering stable, low-noise 3.3V from a dynamically sagging 3.0–4.2V battery rail. Use Value: 165mV dropout extends usable battery life to ~3.465V; 30µVRMS noise avoids RF desensitization and ADC quantization errors. |
Use Scenario: Powering 3.3V logic and interface circuitry in hot-pluggable PCMCIA cards operating from 5V host slots. IC Role / Device Role / Timing Role: Local LDO converting 5V slot power to regulated 3.3V while rejecting noise from shared bus switching transients. Use Value: 63dB PSRR at low frequencies suppresses host-slot ripple; 10nA shutdown enables zero-power card standby state. |
| Hand-Held Instrument Reference Supply | Palmtop Computer Core Logic Rail |
|
Use Scenario: Supplying precision analog front-end and 12-bit ADC in battery-operated multimeters or data loggers. IC Role / Device Role / Timing Role: Low-noise, high-accuracy 3.3V reference source for signal conditioning and digitization stages. Use Value: ±1.4% output accuracy and 30µVRMS noise ensure <0.5 LSB error in 12-bit conversions; 100µA IQ minimizes battery drain during measurement intervals. |
Use Scenario: Powering 3.3V I/O and memory interfaces in compact palmtop computers using dual AA/AAA alkaline cells. IC Role / Device Role / Timing Role: Main system LDO supporting burst-mode CPU operation and SRAM access with fast transient response. Use Value: 12mV load-step transient (0→50mA) and 1µF output capacitor ensure stable core logic timing; thin SOT23-5 saves board space in ultra-thin form factors. |
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 |
|---|---|---|---|
| MAX8878EZK33-T | Includes auto-discharge function (300Ω discharge path); otherwise identical specs and pinout | Required where rapid output discharge during shutdown is mandatory (e.g., multi-rail sequencing) | Select MAX8878EZK33-T only if active output discharge is needed; MAX8877EZK33-T is preferred for minimal leakage and simpler control |
| MCP1700T-3302E/TT | 250mA max output, 6µA IQ, but higher 175mV dropout at 250mA and 45µVRMS noise | Lacks reverse-battery protection and BP noise-filtering capability | Use MCP1700T-3302E/TT only in cost-sensitive, non-battery-reversal environments where ultra-low IQ outweighs noise and protection needs |
Compared with MAX8878EZK33-T, the MAX8877EZK33-T saves board space by omitting discharge circuitry and reduces system leakage in always-on monitoring nodes; versus MCP1700T-3302E/TT, it delivers superior noise performance and integrated reverse-battery safety - critical for consumer handheld reliability.
Availability
MAX8877EZK33 is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8877EZK33 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 engineered specifically for battery-powered portable electronics - prioritizing ultra-low quiescent current, low-noise regulation, and robust fault protection in miniature SOT23 packages.
FAQ
What is the output voltage tolerance of the MAX8877EZK33 over temperature and load?
The MAX8877EZK33 guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating temperature range and for load currents from 0.1mA to 120mA. At +25°C and 0.1mA load, the tolerance tightens to ±1.4% (no wider deviation). This specification ensures reliable 3.3V rail integrity for microcontrollers and communication ICs without external trimming.
Does the MAX8877EZK33 support reverse-battery protection, and how does it behave?
Yes, the MAX8877EZK33 provides reverse-battery protection by disconnecting internal circuitry and parasitic paths when VIN or SHDN falls below GND. It limits reverse current to ≤1mA under such conditions - preventing damage in incorrectly inserted batteries. This feature is intrinsic to the IC's architecture and requires no external components.
What capacitor values are required for stable operation of the MAX8877EZK33?
For stable operation, the MAX8877EZK33 requires a minimum 1µF ceramic input capacitor (X7R/X5R dielectric) and a 1µF output capacitor with ESR <0.2Ω for 3.3V output. A 0.01µF ceramic capacitor must be placed on the BP pin. Larger output capacitance (e.g., 3.3µF–10µF) improves transient response and PSRR but is not mandatory for basic stability.
How does the MAX8877EZK33 differ from the MAX8878EZK33-T in functionality?
The MAX8877EZK33 lacks the auto-discharge function present in the MAX8878EZK33-T. When shut down, the MAX8877EZK33 holds its output voltage; the MAX8878EZK33-T actively discharges OUT to GND via a 300Ω internal path. All other electrical specs, pinout, and package are identical between the two parts.
Can the MAX8877EZK33 operate from a 2.5V input while delivering 3.3V output?
No - the MAX8877EZK33 cannot regulate 3.3V output from a 2.5V input. Its minimum input voltage is defined as VOUT + dropout voltage. With 165mV dropout at 150mA, the minimum valid input is 3.465V. At 2.5V input, the device enters dropout and cannot maintain regulation; output will track input minus losses.
MAX8877EZK33 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:
- 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:
- TSOT-23-5
MAX8877EZK33 FAQ
1.How can I place an order for MAX8877EZK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK33 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 MAX8877EZK33 reliable?
The price and inventory of MAX8877EZK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK33 is usually 5 days.
3.What payment methods are accepted for MAX8877EZK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK33?
MAX8877EZK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK33 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 MAX8877EZK33?
For technical support, including MAX8877EZK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK33 requirements.
6.How does Aetrix verify that MAX8877EZK33 is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK33 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 MAX8877EZK33 meets industry standards.
7.What is the process for return or replacement of MAX8877EZK33?
All MAX8877EZK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK33, 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 MAX8877EZK33 part is unused and in its original packaging.
Return procedure for MAX8877EZK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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