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Analog Devices Inc./Maxim Integrated MAX8867EZK33
- Part No.:
- MAX8867EZK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8867EZK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
MAX8867EZK33 from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.3V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered handheld instruments and PCMCIA cards requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EZK33 datasheet, MAX8867EZK33 pinout, MAX8867EZK33 application, or MAX8867EZK33 equivalent, key selection criteria include output noise performance, shutdown current (10nA), thermal and short-circuit protection, reverse battery tolerance, and SOT23-5 thin-package thermal characteristics.
Technical Context
The MAX8867EZK33 implements a fixed-output LDO architecture with a 1.25V bandgap reference, error amplifier, and internal resistor divider - no external feedback required. Its P-channel MOSFET pass element enables ultra-low quiescent current (100µA) across all operating conditions, including dropout, and eliminates base-drive losses inherent in PNP-based regulators.
It integrates BP-pin noise filtering (via 0.01µF capacitor + internal 200kΩ resistor), logic-controlled shutdown (SHDN active-low), reverse battery protection (≤1mA reverse current), and thermal shutdown with 20°C hysteresis. Unlike the MAX8868 variant, it lacks auto-discharge functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1.4% - factory-preset, no external resistors needed |
| Max Output Current | 150mA - supports moderate-power analog/digital loads without derating |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 3.465V for 3.3V output |
| Output Noise | 30µVRMS (10Hz–100kHz) - suitable for noise-sensitive RF/ADC circuits |
| Quiescent Current | 100µA - constant across load and dropout, extends battery life |
| Shutdown Current | 10nA - enables deep-sleep power management in portable systems |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, dual Alkaline/NiMH, or regulated 5V rails |
Pinout & Package
SOT23-5 thin package (1.6mm × 2.9mm × 0.95mm height), thermally enhanced with GND as heatsink pad. Requires soldering to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic low disables regulator and reduces supply current to 10nA; connect to IN for always-on operation |
| 2 - GND | Power and signal reference | Provides return path and serves as primary thermal conduction path - must be connected to large copper area |
| 3 - IN | Unregulated input supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to GND for stability and noise rejection |
| 4 - OUT | Regulated output | Delivers up to 150mA at 3.3V; requires ≥1µF low-ESR capacitor to GND for transient response and stability |
| 5 - BP | Noise filter reference node | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz RC filter with internal 200kΩ resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - meets stringent analog/RF supply requirements |
| P-channel MOSFET pass element | 100µA quiescent current independent of load or dropout - maximizes battery runtime |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < 0V - prevents damage in miswired battery compartments |
| Thermal and short-circuit protection | Shuts down at +170°C junction temp with 20°C hysteresis - survives sustained overload without failure |
| Preset output accuracy | ±1.4% over -40°C to +85°C - eliminates calibration and reduces BOM count |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA batteries with variable discharge profile. IC Role / Device Role / Timing Role: Primary 3.3V supply for microcontroller, ADC, and display driver - maintains regulation down to 3.465V input. Use Value: Low 165mV dropout extends usable battery life; 30µVRMS noise ensures accurate 16-bit ADC readings. | Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring clean, fast-turn-on 3.3V rail. IC Role / Device Role / Timing Role: Local LDO delivering 3.3V from host 5V bus - handles load transients during card insertion and initialization. Use Value: 100µA quiescent current minimizes standby drain; 10nA shutdown enables full card power gating. |
| Cordless Telephones | Palmtop Computers |
Use Scenario: Base station or handset subsystems using alkaline or NiMH battery packs with wide voltage swing. IC Role / Device Role / Timing Role: Stable 3.3V supply for RF front-end and audio codec - rejects switching noise from DC-DC converters. Use Value: 63dB PSRR at low frequencies suppresses ripple from upstream switching supplies; reverse battery protection guards against user-insertion errors. | Use Scenario: Compact palmtop devices with tight board space and aggressive thermal constraints. IC Role / Device Role / Timing Role: Main system LDO for processor I/O and memory interface - mounted on thin PCB with minimal copper area. Use Value: SOT23-5 thin package (0.95mm height) fits slim form factors; GND-as-heatsink design enables 727mW dissipation at +70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK33-T | Same electrical specs, but in regular-height SOT23-5 (1.1mm vs. 0.95mm); θJB = 140°C/W vs. 110°C/W | Less thermally efficient in space-constrained layouts; higher junction temp rise under same load | Select MAX8867EUK33-T only if board assembly process or footprint compatibility favors standard SOT23. |
| MCP1700T-3302E/MB | 3.3V, 250mA, 175mV dropout at 250mA, 17µVRMS noise, 1.6µA quiescent current - lower IQ but higher dropout and noise | Higher max current but less suitable for ultra-low-noise analog sections due to higher noise floor | Choose MCP1700T-3302E/MB where lowest possible quiescent current dominates over noise or dropout performance. |
Compared with MAX8867EUK33-T, the MAX8867EZK33 offers superior thermal performance in thin-profile designs; compared with MCP1700T-3302E/MB, it delivers significantly lower output noise and tighter dropout - critical for precision analog and battery-end-of-life operation.
Availability
MAX8867EZK33 is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, cordless telephones, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance over industrial temperature range (-40°C to +85°C).
Supply support for MAX8867EZK33 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 MAX8867/MAX8868 product line was designed specifically for battery-powered portable electronics demanding ultra-low noise, low quiescent current, and robust protection features in minimal SOT23 footprints.
FAQ
What is the output voltage tolerance of the MAX8867EZK33 over temperature?
The MAX8867EZK33 guarantees ±1.4% output voltage accuracy over the full industrial temperature range of -40°C to +85°C. This specification includes initial tolerance, line regulation, load regulation, and thermal drift - verified via SQC correlation and 100% production testing at +25°C. The MAX8867EZK33 does not require external trimming or calibration to meet this spec.
Does the MAX8867EZK33 include auto-discharge functionality during shutdown?
No, the MAX8867EZK33 does not include auto-discharge functionality. That feature is exclusive to the MAX8868 family variants (e.g., MAX8868EZK33-T). When the MAX8867EZK33 enters shutdown mode via the SHDN pin, the output remains floating at its last regulated voltage; external circuitry is required to discharge the output if needed.
What capacitor values are recommended for stable operation of the MAX8867EZK33?
For stable operation, the MAX8867EZK33 requires a minimum 1µF ceramic capacitor (X7R/X5R dielectric, <0.2Ω ESR) on the OUT pin and a 1µF capacitor on the IN pin. A 0.01µF ceramic capacitor must be placed on the BP pin for optimal noise reduction. Larger output capacitance (up to 10µF) improves transient response and PSRR but does not compromise stability per the device's internal compensation.
How does reverse battery protection work in the MAX8867EZK33?
The MAX8867EZK33 monitors polarity on both IN and SHDN pins. If either falls below ground, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - preventing damage during incorrect battery insertion. This protection operates independently of regulator state and requires no external components, making it ideal for consumer handheld devices with user-replaceable batteries.
What is the thermal resistance (θJB) of the MAX8867EZK33 package?
The MAX8867EZK33 uses the thin SOT23-5 package with a junction-to-board thermal resistance (θJB) of 110°C/W. This value assumes proper soldering of the GND pin to a PCB ground plane. At +70°C ambient, the device supports up to 727mW continuous power dissipation before derating begins - enabling reliable operation in compact, thermally constrained designs.
MAX8867EZK33 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:
- 63dB (10kHz)
- 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
MAX8867EZK33 FAQ
1.How can I place an order for MAX8867EZK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EZK33 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 MAX8867EZK33 reliable?
The price and inventory of MAX8867EZK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EZK33 is usually 5 days.
3.What payment methods are accepted for MAX8867EZK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EZK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EZK33?
MAX8867EZK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EZK33 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 MAX8867EZK33?
For technical support, including MAX8867EZK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EZK33 requirements.
6.How does Aetrix verify that MAX8867EZK33 is sourced from the original manufacturer or authorized distributors?
All MAX8867EZK33 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 MAX8867EZK33 meets industry standards.
7.What is the process for return or replacement of MAX8867EZK33?
All MAX8867EZK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EZK33, 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 MAX8867EZK33 part is unused and in its original packaging.
Return procedure for MAX8867EZK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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