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Analog Devices Inc./Maxim Integrated MAX8887EZK28+
- Part No.:
- MAX8887EZK28+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK28+.pdf
- Description:
- IC REG LIN 2.8V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,775
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Product details
Overview
MAX8887EZK28+ from Maxim Integrated is a low-noise, 300mA low-dropout linear regulator in SOT23-5 package, delivering a fixed 2.85V output from 2.5V–5.5V input with 100mV dropout at 200mA and 42µVRMS output noise - optimized for power-sensitive portable systems including cellular handsets and PDAs.
For engineers reviewing the MAX8887EZK28+ datasheet, MAX8887EZK28+ pinout, MAX8887EZK28+ application, or MAX8887EZK28+ equivalent, key selection criteria include guaranteed 300mA continuous output, micropower shutdown (0.1µA), thermal/short-circuit protection, and compatibility with 2.2µF ceramic input/output capacitors for stable operation in battery-powered designs.
Technical Context
The MAX8887EZK28+ uses an internal p-channel MOSFET pass transistor with ~0.5Ω RDS(ON), enabling ultra-low quiescent current (55µA no-load) independent of load - unlike PNP-based LDOs that increase bias current under load or in dropout. Its reference bypass (BP) pin supports external 0.01µF capacitor to suppress noise.
It features fixed 2.85V output set by internal resistor divider, ±2% accuracy over 0°C to +85°C and 100µA–300mA load, 60dB PSRR at 1kHz, and foldback current limiting triggered when VOUT falls below 93% of nominal - distinguishing it from the POK-equipped MAX8888 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V - factory-trimmed, eliminates external feedback network and saves PCB space. |
| Max Continuous Output Current | 300mA - sufficient to power baseband processors or RF front-end ICs in handheld devices. |
| Dropout Voltage | 100mV at 200mA - enables regulation down to 2.95V input, extending usable battery life in Li-ion (2.8–4.2V) applications. |
| Output Noise | 42µVRMS (10Hz–100kHz) - low enough for noise-sensitive analog circuits like ADC references or RF synthesizers. |
| No-Load Supply Current | 55µA - remains constant across load, critical for standby power budgeting in always-on subsystems. |
| Shutdown Current | 0.1µA - reduces system leakage during deep sleep, supporting multi-week battery shelf life. |
| PSRR | 60dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
Pinout & Package
Package: 5-pin SOT23 (Z5-1), 1mm height, RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | 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 disable regulator; draws ≤100nA bias current; tolerates up to 6V regardless of VIN/VOUT. |
| 4 - BP | Reference bypass | Connects to 0.01µF low-leakage ceramic capacitor to reduce reference noise and improve output noise performance. |
| 5 - OUT | Regulated output | Delivers 2.85V at up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 42µVRMS output noise with BP bypass - enables clean power for precision analog or RF circuitry without additional filtering. |
| p-Channel MOSFET pass element | 0.5Ω RDS(ON) - eliminates base-drive current loss, maintaining 55µA quiescent current even at full 300mA load and in dropout. |
| Foldback current limiting | Reduces current limit to 500mA (pulsed) when VOUT drops below 93% of 2.85V - protects downstream loads during brownout or short-circuit events. |
| Thermal shutdown with hysteresis | Triggers at +170°C junction temperature and re-enables after 20°C cooldown - prevents latch-up during sustained overload while allowing safe recovery. |
| Micropower shutdown mode | 0.1µA supply current in shutdown - preserves battery charge during extended idle periods in portable instrumentation or wearables. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage or camera sensor analog supply in compact mobile phones. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying 2.85V to noise-sensitive mixed-signal blocks. Use Value: 42µVRMS noise and 60dB PSRR prevent corruption of ADC conversions or RF PLL phase noise. |
Use Scenario: Providing stable 2.85V bias to CMOS image sensor analog front-end and ISP core logic. IC Role / Device Role / Timing Role: Dedicated low-dropout regulator for imaging subsystem requiring fast load-transient response. Use Value: 100mV dropout at 200mA allows operation down to 2.95V input, maximizing battery utilization during video capture. |
| PDAs and Palmtop Computers | Hand-Held Instruments |
Use Scenario: Supplying real-time clock (RTC) backup domain or low-power microcontroller I/O bank in legacy PDA platforms. IC Role / Device Role / Timing Role: Always-on LDO with micropower shutdown for auxiliary power domains. Use Value: 0.1µA shutdown current extends weeks-long battery shelf life without compromising wake-up responsiveness. |
Use Scenario: Delivering precision 2.85V reference voltage to 16-bit SAR ADC and op-amp signal chain in portable test equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply rail decoupled from noisy digital power rails. Use Value: ±2% output accuracy over temperature and load ensures measurement repeatability without calibration drift. |
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 |
|---|---|---|---|
| Torex XC6206P282MR | 2.8V output (±2%), 150mA max, 120mV dropout at 100mA, no BP pin, 65µA IQ | Limited to lower current; lacks BP noise-reduction capability and thermal foldback protection | Use only where 150mA suffices and noise <50µVRMS is acceptable; not suitable for 300mA pulsed loads. |
| Analog Devices ADP160ACBZ-2.85-R7 | 2.85V output (±1.5%), 150mA max, 195mV dropout at 150mA, 1.4µA IQ in shutdown | Lower IQ in shutdown but significantly lower current rating and higher dropout; no BP pin | Preferable only for ultra-low-quiescent applications with sub-150mA loads; cannot replace MAX8887EZK28+ in 300mA designs. |
Compared with XC6206P282MR and ADP160ACBZ-2.85-R7, the MAX8887EZK28+ uniquely combines 300mA capability, 100mV dropout, 42µVRMS noise with BP support, and integrated thermal/current protection - making it irreplaceable in high-fidelity portable power rails demanding both performance and robustness.
Availability
MAX8887EZK28+ is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, PDAs, and hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8887EZK28+ 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 MAX8887 series belongs to Maxim's precision low-noise LDO family, designed specifically for battery-powered portable electronics where ultra-low quiescent current, low output noise, and small footprint are mandatory.
FAQ
What is the output voltage tolerance of the MAX8887EZK28+ over temperature and load?
The MAX8887EZK28+ maintains ±2% output voltage accuracy across 0°C to +85°C ambient temperature and 100µA to 300mA load current, as specified in the Electrical Characteristics table. This tight tolerance ensures reliable operation of downstream logic and analog circuits without requiring external trimming or calibration - a key advantage of the factory-trimmed 2.85V output in the MAX8887EZK28+.
Does the MAX8887EZK28+ include a power-good (POK) output?
No, the MAX8887EZK28+ does not include a POK output. That feature is exclusive to the MAX8888 series (e.g., MAX8888EZK28+). The MAX8887EZK28+ is the low-noise variant and omits the open-drain POK pin to simplify design and reduce cost where power monitoring is handled externally - confirming its identity as the noise-optimized member of the MAX8887/MAX8888 family.
What capacitor values are required for stable operation of the MAX8887EZK28+?
The MAX8887EZK28+ requires a 2.2µF ceramic capacitor on both IN and OUT pins (with ESR < 0.1Ω), plus a 0.01µF ceramic capacitor on the BP pin for optimal noise performance. These values are validated in the Typical Operating Circuit and ensure stability, low noise, and fast transient response - deviations may cause oscillation or degraded PSRR, as confirmed by the manufacturer's application guidance for the MAX8887EZK28+.
Can the MAX8887EZK28+ operate with a 2.5V input while delivering 2.85V output?
No - the MAX8887EZK28+ cannot regulate at 2.5V input because its minimum input voltage is 2.5V and dropout is 100mV at 200mA; to sustain 2.85V output, VIN must exceed 2.95V. Operation below this violates regulation specification and causes output collapse, as shown in the "Output Voltage vs. Input Voltage" curve (toc01) and explicitly stated in the Absolute Maximum Ratings section for the MAX8887EZK28+.
What protection features are built into the MAX8887EZK28+?
The MAX8887EZK28+ integrates short-circuit protection, thermal shutdown (triggering at +170°C with 20°C hysteresis), foldback current limiting (reducing limit to 500mA when VOUT < 93% of 2.85V), and micropower shutdown (0.1µA). These protections are fully documented in the Detailed Description and Electrical Characteristics sections - ensuring robust operation in real-world fault conditions without external circuitry for the MAX8887EZK28+.
MAX8887EZK28+ 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):
- 2.8V
- 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
MAX8887EZK28+ FAQ
1.How can I place an order for MAX8887EZK28+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK28+ 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 MAX8887EZK28+ reliable?
The price and inventory of MAX8887EZK28+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK28+ is usually 5 days.
3.What payment methods are accepted for MAX8887EZK28+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK28+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK28+?
MAX8887EZK28+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK28+ 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 MAX8887EZK28+?
For technical support, including MAX8887EZK28+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK28+ requirements.
6.How does Aetrix verify that MAX8887EZK28+ is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK28+ 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 MAX8887EZK28+ meets industry standards.
7.What is the process for return or replacement of MAX8887EZK28+?
All MAX8887EZK28+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK28+, 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 MAX8887EZK28+ part is unused and in its original packaging.
Return procedure for MAX8887EZK28+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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