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Analog Devices Inc./Maxim Integrated MAX8877EZK32+
- Part No.:
- MAX8877EZK32+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK32+.pdf
- Description:
- FIXED POSITIVE LDO REGULATOR, 3.
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
MAX8877EZK32+ from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.15V fixed output, 150mA max load, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current - designed for space-constrained battery-powered systems such as handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8877EZK32+ datasheet, MAX8877EZK32+ pinout, MAX8877EZK32+ application, or MAX8877EZK32+ equivalent, key selection criteria include dropout performance at 150mA, shutdown current (10nA), reverse battery protection, thermal shutdown behavior, and SOT23-5 thin-package thermal resistance (θJB = 110°C/W).
Technical Context
The MAX8877EZK32+ uses an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω) to achieve low dropout and load-independent quiescent current. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates reverse battery protection (limits reverse current to 1mA), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, and logic-controlled shutdown. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise and enables 30µVRMS output noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V ±1.4% (factory-preset; stable over -40°C to +85°C and 0.1–120mA load) |
| Max Output Current | 150mA continuous; current limit activates at ≥160mA (min) to protect under short-circuit conditions |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 3.315V; critical for end-of-battery-life support) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap and 10µF COUT; suitable for RF/ADC power rails) |
| Quiescent Current | 100µA across full load range and dropout condition - ensures minimal battery drain in portable devices |
| Shutdown Current | 10nA (logic-low SHDN); enables ultra-low-power system sleep modes without external disconnect |
| Thermal Protection | Shuts down at +155°C junction temperature; restarts after 15°C cooldown - prevents permanent damage during overload |
Pinout & Package
MAX8877EZK32+ is housed in a RoHS-compliant, lead-free thin 5-pin SOT23 package (package code Z5+1*, drawing 21-0113), with θJB = 110°C/W and GND pin serving as both electrical ground and thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to GND for stability and line-transient suppression |
| 2 - GND | Ground reference and thermal sink | Must be soldered to large PCB copper area to maintain θJB = 110°C/W and prevent thermal shutdown at full load |
| 3 - SHDN | Active-low enable control | Pulling low disables regulator and reduces IQ to 10nA; no auto-discharge (MAX8878 feature only) |
| 4 - BP | Bypass for internal reference | Connects to 0.01µF low-leakage ceramic cap; forms 80Hz filter to reduce output noise to 30µVRMS |
| 5 - OUT | Regulated output | Delivers up to 150mA at 3.15V; requires ≥1µF (ESR < 0.2Ω) ceramic cap for VOUT ≥ 2.5V stability |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ regardless of load or dropout state |
| Reverse battery protection | Clamps reverse input current to ≤1mA when VIN or SHDN falls below GND - prevents damage in miswired battery packs |
| Low-noise BP filtering | 0.01µF capacitor on BP pin reduces output noise to 30µVRMS - meets noise-sensitive analog/RF supply requirements |
| Thermal shutdown with hysteresis | Turns off at +155°C and re-enables only after cooling by 15°C - avoids oscillation during sustained overload |
| Preset 3.15V output | Factory-trimmed ±1.4% accuracy eliminates external resistor network; simplifies layout and reduces BOM count |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary 3.15V supply for microcontroller, ADC, and display driver circuitry. Use Value: 165mV dropout extends usable battery life to ~3.3V cutoff; 30µVRMS noise avoids ADC quantization errors. |
Use Scenario: Credit-card-sized peripheral cards requiring regulated 3.3V-compatible rail from host bus voltage. IC Role / Device Role / Timing Role: Local LDO converting 5V PCMCIA bus voltage to clean 3.15V for card controller and memory interface. Use Value: Pin-compatible '2982 footprint allows drop-in replacement; reverse battery protection guards against hot-swap transients. |
| Cordless Telephones | Electronic Planners |
|
Use Scenario: Base station and handset subsystems needing low-quiescent, stable voltage for RF front-end and audio codec. IC Role / Device Role / Timing Role: Dedicated 3.15V rail for low-noise analog signal chain components. Use Value: 100µA IQ minimizes standby drain; 63dB PSRR at low frequencies suppresses switching noise from nearby DC/DC converters. |
Use Scenario: Palm-sized organizers with flash memory, LCD, and real-time clock - all powered from coin cell or rechargeable pack. IC Role / Device Role / Timing Role: Main system regulator delivering 3.15V to processor core and peripherals. Use Value: 10nA shutdown current enables multi-week deep-sleep retention; thermal protection prevents overheating in sealed enclosures. |
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 |
|---|---|---|---|
| MAX8878EZK32+ | Includes auto-discharge function on shutdown; otherwise identical specs and pinout | Required where rapid output discharge is needed (e.g., safety-critical power sequencing) | Select MAX8878EZK32+ only if active output discharge during shutdown is mandatory |
| MCP1700T-315I/TT | Lower max current (250mA), higher dropout (600mV @ 250mA), no reverse battery protection | Suitable for cost-sensitive, non-battery-reversal environments with less stringent noise requirements | Choose MCP1700T-315I/TT for higher current or lower cost - but verify absence of reverse polarity risk and noise tolerance |
Compared with MAX8877EZK32+, MAX8878EZK32+ adds auto-discharge without altering regulation performance, while MCP1700T-315I/TT trades reverse protection and ultra-low noise for higher output current and broader availability - making each suitable for distinct system-level trade-offs.
Availability
MAX8877EZK32+ is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and cordless telephones requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8877EZK32+ 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 industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, low noise, and robust protection - targeting designs where runtime, reliability, and board space are critical constraints.
FAQ
What is the output voltage tolerance of the MAX8877EZK32+ over temperature and load?
The MAX8877EZK32+ delivers 3.15V with ±1.4% initial accuracy at +25°C and 0.1mA load. Over the full -40°C to +85°C temperature range and 0.1mA–120mA load, output voltage remains within ±3.5% for VOUT < 2.5V and ±3.0% for VOUT ≥ 2.5V - confirmed per Electrical Characteristics table. MAX8877EZK32+ maintains tight regulation due to factory-trimmed internal feedback resistors.
Does the MAX8877EZK32+ include auto-discharge functionality during shutdown?
No, the MAX8877EZK32+ does not include auto-discharge. That feature is exclusive to the MAX8878 variant (e.g., MAX8878EZK32+). When SHDN is pulled low on the MAX8877EZK32+, the output floats; it does not actively discharge to ground. This distinction is clearly stated in the Functional Diagram and Pin Description sections of the datasheet.
What is the recommended output capacitor for stable operation of the MAX8877EZK32+?
For MAX8877EZK32+ (3.15V output ≥ 2.5V), a minimum 1µF ceramic capacitor with ESR < 0.2Ω is required on the OUT pin. X7R or X5R dielectrics are preferred for stable capacitance across temperature. Larger values (e.g., 3.3µF–10µF) improve load-transient response and PSRR but are not mandatory for basic stability.
Can the MAX8877EZK32+ operate with an input voltage below 2.5V?
No. The absolute minimum input voltage for MAX8877EZK32+ is 2.5V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below this threshold is undefined and may result in regulation failure or increased noise. For sub-2.5V inputs, alternative regulators such as the MAX1726 series must be considered.
What thermal derating applies to the MAX8877EZK32+ in its thin SOT23 package?
The MAX8877EZK32+ in thin SOT23 (Z5+1* package) has θJB = 110°C/W and a continuous power dissipation limit of 727mW at TA = +70°C, derating at 9.1mW/°C above that temperature. To sustain 150mA at 3.15V output with VIN = 4.5V, ensure PCB thermal design provides adequate GND pad area to maintain junction temperature ≤ +150°C.
MAX8877EZK32+ 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):
- 3.15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (10kHz)
- Control Features:
- Current Limit, 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
MAX8877EZK32+ FAQ
1.How can I place an order for MAX8877EZK32+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK32+ 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 MAX8877EZK32+ reliable?
The price and inventory of MAX8877EZK32+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK32+ is usually 5 days.
3.What payment methods are accepted for MAX8877EZK32+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK32+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK32+?
MAX8877EZK32+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK32+ 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 MAX8877EZK32+?
For technical support, including MAX8877EZK32+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK32+ requirements.
6.How does Aetrix verify that MAX8877EZK32+ is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK32+ 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 MAX8877EZK32+ meets industry standards.
7.What is the process for return or replacement of MAX8877EZK32+?
All MAX8877EZK32+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK32+, 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 MAX8877EZK32+ part is unused and in its original packaging.
Return procedure for MAX8877EZK32+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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