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Analog Devices Inc./Maxim Integrated MAX8877EZK45
- Part No.:
- MAX8877EZK45
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK45.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 150MILLI
- Quantity:
- Payment:
- Shipping:
Inventory:1,413
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Product details
Overview
MAX8877EZK45 from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 4.5V output, delivering up to 150mA from 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 voltage rails.
For engineers reviewing the MAX8877EZK45 datasheet, MAX8877EZK45 pinout, MAX8877EZK45 application, or MAX8877EZK45 equivalent, key selection criteria include its SOT23-5 thin-package footprint, ±1.4% output voltage accuracy, reverse battery protection, 10nA shutdown current, and compatibility with industry-standard '2982 pinout.
Technical Context
The MAX8877EZK45 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.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection, and reverse battery protection limiting reverse current to 1mA. Unlike the MAX8878, it lacks auto-discharge functionality - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.5V preset (±1.4% accuracy over -40°C to +85°C), factory-trimmed, no external resistors required. |
| Max Output Current | 150mA continuous; current limit minimum 160mA ensures safe operation under overload or short-circuit. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 4.665V while maintaining regulated 4.5V output. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP capacitor - suitable for noise-sensitive analog/RF circuitry. |
| Quiescent Current | 100µA across full load range and dropout - preserves battery life in always-on or low-duty-cycle systems. |
| Shutdown Current | 10nA logic-controlled shutdown - reduces system standby power to negligible levels. |
| Input Voltage Range | 2.5V to 6.5V - supports single Li-ion, dual alkaline/NiMH, or regulated intermediate rails. |
Pinout & Package
MAX8877EZK45 is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves as both electrical return and thermal path - requires connection to a large PCB copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–6.5V; bypass with ≥1µF ceramic capacitor to GND for stability and line-transient suppression. |
| 2 GND | Ground reference and thermal pad | Electrical ground return; solder to large copper pour to dissipate heat and maintain junction temperature ≤150°C. |
| 3 SHDN | Active-low enable control | Pull low to enter 10nA shutdown; pull high (≥2.0V) or tie to IN for normal operation; no auto-discharge function. |
| 4 BP | Bypass node for reference noise filtering | Connect 0.01µF ceramic capacitor to GND to reduce output noise; larger values increase startup time without benefit. |
| 5 OUT | Regulated output | Delivers up to 150mA at 4.5V; bypass with ≥1µF (ESR < 0.2Ω) ceramic capacitor for VOUT ≥ 2.5V applications. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA quiescent current regardless of load or dropout condition. |
| Reverse battery protection | Blocks reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage in misinserted battery scenarios. |
| Thermal and short-circuit protection | Shuts down at 155°C junction temperature with 15°C hysteresis; survives indefinite output short to GND. |
| Industry-standard '2982 pinout | Enables drop-in replacement in existing designs using legacy regulators without PCB layout changes. |
| Low-noise BP capacitor interface | 0.01µF BP capacitor creates 80Hz low-pass filter on internal reference - achieves 30µVRMS output noise without complex filtering. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceivers and baseband processors in compact GSM/CDMA handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Primary 4.5V LDO supplying noise-sensitive analog front-end and PLL circuits. Use Value: 30µVRMS noise and 165mV dropout extend usable battery voltage range and prevent RF desense during transmit bursts. |
Use Scenario: Providing regulated 4.5V rail to PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling host bus voltage and isolating card circuitry from supply ripple. Use Value: 100µA quiescent current minimizes standby drain; reverse battery protection safeguards against hot-swap insertion errors. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Supplying microcontroller core and LCD driver in palm-sized PDAs powered by two AA alkaline cells (3.0V–3.2V fresh). IC Role / Device Role / Timing Role: Boost-compatible LDO generating stable 4.5V from buck-boost converter output. Use Value: 2.5V minimum input allows regulation until battery depletes to ~2.95V, maximizing runtime before brownout reset. |
Use Scenario: Powering real-time clock, SRAM backup, and touch-screen controller in battery-backed organizers. IC Role / Device Role / Timing Role: Always-on LDO maintaining 4.5V for critical memory and timing functions during sleep mode. Use Value: 10nA shutdown current ensures >10-year data retention on coin-cell backup; ±1.4% accuracy guarantees RTC timing stability. |
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 |
|---|---|---|---|
| MAX8877EUK45-T | Same electrical specs and pinout, but in regular (not thin) SOT23-5 package - 140°C/W θJB vs. 110°C/W for EZK variant. | Higher thermal resistance limits max continuous power in confined spaces; suitable where board height is not constrained. | Select MAX8877EUK45-T only if PCB stack-up permits taller component profile and thermal margin exceeds 10°C. |
| TCS2115-4.5V | Lower 25µVRMS noise, but higher 220mV dropout at 150mA and 120µA quiescent current; no reverse battery protection. | Lacks reverse polarity safeguard - requires external diode or FET in battery-input path for same robustness. | Choose TCS2115-4.5V only when ultra-low noise dominates over fault tolerance and battery-life optimization. |
Compared with MAX8877EZK45, the MAX8877EUK45-T trades thinner profile for reduced thermal performance, while the TCS2115-4.5V sacrifices protection and efficiency for marginal noise improvement - making MAX8877EZK45 optimal for space-limited, battery-critical designs demanding integrated safety.
Availability
MAX8877EZK45 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8877EZK45 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 family was designed specifically for battery-powered portable electronics needing ultra-low quiescent current, low noise, and robust fault protection in minimal footprint - targeting handheld, wearables, and IoT edge devices.
FAQ
What is the output voltage tolerance of the MAX8877EZK45 over temperature and load?
The MAX8877EZK45 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%; worst-case drift remains bounded within the ±1.4% limit, ensuring reliable operation in precision analog subsystems without external trimming.
Does the MAX8877EZK45 include auto-discharge functionality during shutdown?
No, the MAX8877EZK45 does not include auto-discharge. That feature is exclusive to the MAX8878 variant. When MAX8877EZK45 enters shutdown (SHDN pulled low), the output goes into high-impedance state - residual charge on downstream capacitance must decay naturally or via external bleed resistors.
What is the recommended output capacitor for the MAX8877EZK45 at 4.5V output?
For MAX8877EZK45 configured for 4.5V output (VOUT ≥ 2.5V), a minimum 1µF X7R/X5R ceramic capacitor with ESR < 0.2Ω is recommended. Larger values (e.g., 3.3µF–10µF) improve load-transient response and PSRR but are not required for basic stability across -40°C to +85°C.
Can the MAX8877EZK45 operate from a 2.5V input while regulating 4.5V output?
No - the MAX8877EZK45 cannot regulate 4.5V output from 2.5V input. Its minimum input voltage is defined as VOUT + dropout voltage. With 165mV dropout at full load, minimum valid input is 4.665V. At light loads, dropout drops to 55mV (per datasheet), requiring ≥4.555V input - still above 2.5V.
Is the MAX8877EZK45 pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK45 is fully pin-compatible with the industry-standard '2982 series. Pin 1 (IN), Pin 2 (GND), Pin 3 (SHDN), Pin 4 (BP), and Pin 5 (OUT) match the '2982 pinout exactly - enabling direct replacement without PCB modification or schematic updates.
MAX8877EZK45 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):
- 4.5V
- 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
MAX8877EZK45 FAQ
1.How can I place an order for MAX8877EZK45 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK45 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 MAX8877EZK45 reliable?
The price and inventory of MAX8877EZK45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK45 is usually 5 days.
3.What payment methods are accepted for MAX8877EZK45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK45?
MAX8877EZK45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK45 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 MAX8877EZK45?
For technical support, including MAX8877EZK45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK45 requirements.
6.How does Aetrix verify that MAX8877EZK45 is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK45 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 MAX8877EZK45 meets industry standards.
7.What is the process for return or replacement of MAX8877EZK45?
All MAX8877EZK45 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK45, 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 MAX8877EZK45 part is unused and in its original packaging.
Return procedure for MAX8877EZK45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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