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Analog Devices Inc./Maxim Integrated MAX8887EZK27+
- Part No.:
- MAX8887EZK27+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK27+.pdf
- Description:
- IC REG LIN 2.7V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
MAX8887EZK27+ from Maxim Integrated is a low-noise, 300mA low-dropout linear regulator with fixed 2.7V output, optimized for battery-powered portable electronics. It operates from 2.5V to 5.5V input, delivers 100mV dropout at 200mA, consumes only 55µA quiescent current, and features 42µVRMS output noise - enabling clean power for RF sections and precision analog circuits in handheld devices.
For engineers reviewing the MAX8887EZK27+ datasheet, MAX8887EZK27+ pinout, MAX8887EZK27+ application, or MAX8887EZK27+ equivalent, key selection criteria include guaranteed 300mA continuous output, ±2% output voltage accuracy over load/temperature, micropower shutdown (0.1µA), thermal/short-circuit protection, and compatibility with 2.2µF ceramic input/output capacitors in space-constrained SOT23 layouts.
Technical Context
The MAX8887EZK27+ uses an internal p-channel MOSFET pass transistor with ~0.5Ω RDS(ON), eliminating base-drive current and enabling stable 55µA ground-pin current independent of load - critical for ultra-low-power operation across full 0–300mA range. Its reference bypass (BP) pin supports external 0.01µF capacitor to suppress high-frequency noise.
Unlike PNP-based LDOs, it avoids saturation-related inefficiency in dropout; regulation is maintained down to VIN = VOUT + 100mV at 200mA. The device integrates foldback current limiting (420mA typical at nominal VOUT, reduced under undervoltage) and thermal shutdown at +170°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±2% over 0–300mA load and -40°C to +85°C - ensures stable core voltage for 2.7V logic or analog rails. |
| Max Continuous Output Current | 300mA guaranteed - sufficient to power baseband processors or RF transceivers in compact wireless handsets. |
| Dropout Voltage | 100mV at 200mA - extends usable battery life by regulating down to VIN = 2.8V when VOUT = 2.7V. |
| Quiescent Current | 55µA no-load - minimizes standby drain in always-on subsystems like real-time clocks or sensor interfaces. |
| Output Noise | 42µVRMS (10Hz–100kHz, CBP = 0.01µF) - low enough for sensitive ADC references or PLL VCO supplies. |
| PSRR | 60dB at 1kHz - effectively attenuates switching noise from adjacent DC-DC converters. |
| Shutdown Current | 0.1µA - enables deep-sleep modes without compromising system-level energy budgets. |
Pinout & Package
MAX8887EZK27+ is housed in a thin 5-pin SOT23 package (1mm height, Z5-1 footprint), RoHS-compliant and lead-free. Pin assignments are identical to the MAX8887 family: IN, GND, SHDN, BP, OUT - with BP dedicated to noise-reduction bypass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Power ground reference | Low-impedance return path; must be connected directly to PCB ground plane with minimal trace length. |
| 3 - SHDN | Active-low enable control | Pulled low to enter 0.1µA shutdown; pulled high (to IN or ≥1.6V) for normal operation; tolerates up to 6V. |
| 4 - BP | Reference bypass terminal | Connects to 0.01µF low-leakage ceramic capacitor to reduce output noise - unique to MAX8887 variants. |
| 5 - OUT | Regulated output | Delivers up to 300mA at 2.7V; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 42µVRMS output noise with BP bypass - enables direct powering of RF front-ends without additional filtering. |
| p-Channel MOSFET pass element | 0.5Ω RDS(ON) and zero base-drive current - maintains 55µA quiescent current across full load range. |
| Foldback current limiting | Reduces current limit to ~500mA when VOUT drops below 93% of 2.7V - protects during short-circuit or brownout. |
| Thermal shutdown with hysteresis | Turns off at +170°C junction temperature; re-enables after cooling by 20°C - prevents latch-up during sustained overload. |
| Micropower shutdown mode | 0.1µA supply current with SHDN low - preserves battery charge during extended idle periods in portable systems. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors during active call or data transmission. IC Role / Device Role / Timing Role: Primary 2.7V LDO supplying noise-sensitive RF section and digital core logic. Use Value: 42µVRMS noise and 60dB PSRR prevent AM modulation of RF carriers; 100mV dropout extends talk time from Li-ion cells. |
Use Scenario: Supplying image sensor interface and ISP (image signal processor) during burst capture mode. IC Role / Device Role / Timing Role: Low-noise 2.7V rail generator for analog front-end and high-speed parallel data paths. Use Value: Stable 2.7V ±2% output ensures consistent ADC reference and pixel gain calibration; fast load-transient response prevents frame corruption. |
| Notebook Computers | Hand-Held Instruments |
Use Scenario: Providing auxiliary 2.7V supply for embedded controller (EC), keyboard controller, or smart battery interface. IC Role / Device Role / Timing Role: Always-on LDO supporting system management functions during sleep states. Use Value: 0.1µA shutdown current minimizes battery self-discharge; SOT23-5 footprint saves board area in tight EC module layouts. |
Use Scenario: Powering precision analog front-end (AFE), ADC, and microcontroller in portable multimeters or gas detectors. IC Role / Device Role / Timing Role: Clean, stable 2.7V reference source for ratiometric sensor excitation and measurement. Use Value: Low 55µA quiescent current extends alkaline battery life beyond 12 months; ±2% accuracy ensures calibrated measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 300mA LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78227DRVT | 2.7V fixed output, 250mA rated, 175mV dropout at 200mA, 25µVRMS noise (with NR/SS pin), 1.7µA IQ | Lowers noise further but sacrifices 50mA output capability and has higher dropout - less suitable for high-current bursts. | Prefer when ultra-low noise dominates over peak current; verify thermal margin at 300mA with PCB copper area. |
| MCP1702T-2702E/MB | 2.7V fixed output, 250mA rated, 600mV dropout at 250mA, 30µVRMS noise, 2.5µA IQ | Higher dropout limits usable battery range; lower max current restricts use in multi-rail systems with shared loads. | Select for cost-sensitive, low-power instrumentation where 250mA suffices and input voltage stays >3.3V. |
Compared with TPS78227DRVT and MCP1702T-2702E/MB, MAX8887EZK27+ uniquely balances 300mA delivery, 100mV dropout, and 42µVRMS noise in a single SOT23-5 package - making it optimal for space-constrained, battery-operated systems requiring both headroom and spectral purity.
Availability
MAX8887EZK27+ is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, notebook computers, and hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8887EZK27+ 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8887 series targets portable battery-powered equipment - delivering low-noise, low-quiescent-current regulation in ultra-small packages for PDAs, cellular phones, and notebook subsystems.
FAQ
What is the output voltage tolerance of the MAX8887EZK27+ over temperature and load?
The MAX8887EZK27+ guarantees ±2% output voltage accuracy across the full operating temperature range (-40°C to +85°C) and load current range (100µA to 300mA). At +25°C and 100mA load, typical deviation is ±1.2%. This tight tolerance ensures reliable operation of 2.7V logic and analog circuitry without external trimming or feedback adjustment - a key advantage over general-purpose LDOs with ±4% or wider specs.
Does the MAX8887EZK27+ require an external bypass capacitor on the BP pin?
Yes - the MAX8887EZK27+ requires a 0.01µF low-leakage ceramic capacitor between the BP pin and GND to achieve its specified 42µVRMS output noise performance. Omitting this capacitor increases output noise significantly and degrades PSRR above 10kHz. The BP pin is exclusive to MAX8887 variants (not present on MAX8888); it filters the internal reference voltage to suppress high-frequency noise coupling into the error amplifier.
Can the MAX8887EZK27+ be used with ceramic output capacitors?
Yes - the MAX8887EZK27+ is fully compatible with ceramic output capacitors. It requires a minimum 2.2µF X5R/X7R ceramic capacitor (ESR < 0.1Ω) from OUT to GND for stability. Larger values (e.g., 4.7µF) improve load-transient response and PSRR. Unlike older LDOs, it does not require ESR-tuned tantalum or aluminum electrolytic capacitors, simplifying design and improving reliability in portable applications.
What is the maximum input voltage the MAX8887EZK27+ can withstand?
The MAX8887EZK27+ has an absolute maximum input voltage rating of +7V on the IN pin relative to GND. However, its functional operating range is strictly 2.5V to 5.5V. Exceeding 5.5V may cause excessive power dissipation or thermal shutdown, while voltages below 2.5V trigger undervoltage lockout (UVLO) and disable regulation. For 5V USB-powered systems, the 5.5V upper limit provides safe margin against ripple and transients.
How does the MAX8887EZK27+ behave during thermal overload?
When the MAX8887EZK27+ junction temperature exceeds +170°C, its internal thermal sensor disables the p-channel pass transistor, dropping output voltage to near zero. After the die cools by 20°C (to ~150°C), the regulator automatically resumes operation - resulting in pulsed output during sustained overload. This cycling protects the device from permanent damage but indicates inadequate heatsinking or excessive (VIN – VOUT) × IOUT; users must verify power dissipation using θJA = 220°C/W for SOT23.
MAX8887EZK27+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX8887EZK27+ FAQ
1.How can I place an order for MAX8887EZK27+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK27+ 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 MAX8887EZK27+ reliable?
The price and inventory of MAX8887EZK27+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK27+ is usually 5 days.
3.What payment methods are accepted for MAX8887EZK27+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK27+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK27+?
MAX8887EZK27+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK27+ 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 MAX8887EZK27+?
For technical support, including MAX8887EZK27+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK27+ requirements.
6.How does Aetrix verify that MAX8887EZK27+ is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK27+ 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 MAX8887EZK27+ meets industry standards.
7.What is the process for return or replacement of MAX8887EZK27+?
All MAX8887EZK27+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK27+, 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 MAX8887EZK27+ part is unused and in its original packaging.
Return procedure for MAX8887EZK27+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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