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Analog Devices Inc./Maxim Integrated MAX8887EZK25+T
- Part No.:
- MAX8887EZK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK25+T.pdf
- Description:
- IC REG LIN 2.5V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
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Product details
Overview
MAX8887EZK25+T from Maxim Integrated is a low-noise, 2.5V fixed-output, 300mA low-dropout linear regulator in SOT23-5 package, featuring 100mV dropout at 200mA, 42µVRMS output noise (with 0.01µF BP bypass), and 55µA no-load supply current. It powers sensitive analog rails in portable battery-powered systems including cellular handsets and PDAs.
For engineers reviewing the MAX8887EZK25+T datasheet, MAX8887EZK25+T pinout, MAX8887EZK25+T application, or MAX8887EZK25+T equivalent, key selection criteria include guaranteed 300mA output under 2.5V–5.5V input, thermal/short-circuit protection, micropower shutdown (0.1µA), and compatibility with standard 2.2µF ceramic input/output capacitors for stable operation in space-constrained designs.
Technical Context
The MAX8887EZK25+T uses an internal p-channel MOSFET pass transistor with ~0.5Ω RDS(ON), eliminating base-drive current and enabling consistent 55µA ground-pin current across load and dropout conditions. Its error amplifier compares feedback from a factory-trimmed resistive divider against a 1.25V reference to regulate the 2.5V output.
Noise performance is enhanced by the dedicated BP (bypass) pin, which accepts a 0.01µF capacitor to filter reference noise - a feature exclusive to the MAX8887 family (not present on MAX8888). The device lacks POK output, distinguishing it functionally from MAX8888 variants while sharing identical pinout, package, and protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over -40°C to +85°C; enables direct replacement of 2.5V logic or analog supply rails without external feedback. |
| Max Output Current | 300mA continuous (500mA pulsed); supports moderate-power RF modules or microcontroller cores without derating at ambient ≤+85°C. |
| Dropout Voltage | 100mV at 200mA; allows regulation down to VIN = 2.6V, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Output Noise | 42µVRMS (10Hz–100kHz, with 0.01µF BP cap); meets low-noise requirements for ADC references or RF synthesizer VCO supplies. |
| Quiescent Current | 55µA at no load; remains constant vs. load, enabling predictable battery runtime estimation in always-on sensor nodes. |
| PSRR | 60dB at 1kHz; suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Shutdown Current | 0.1µA with SHDN pulled low; reduces system standby power to sub-microwatt levels in sleep modes. |
Pinout & Package
MAX8887EZK25+T is housed in a thin 5-pin SOT23 package (1mm height, Z5-1 footprint), RoHS-compliant and optimized for high-density PCB layouts in handheld devices.
| 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 | Power ground reference | Low-impedance return path for load, bias, and bypass currents; must be connected directly to system ground plane. |
| 3. SHDN | Active-low enable control | Pulled low → shutdown (0.1µA IQ); tied to IN for always-on operation; tolerates up to 6V regardless of VIN/VOUT. |
| 4. BP | Reference bypass node | Connects 0.01µF low-leakage ceramic capacitor to reduce reference noise and achieve 42µVRMS output noise. |
| 5. OUT | Regulated output | Delivers up to 300mA at 2.5V; requires ≥2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and load-transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 42µVRMS output noise enabled by dedicated BP pin and 0.01µF capacitor - critical for precision analog and RF subsystems. |
| Load-independent quiescent current | 55µA IQ maintained from zero to 300mA load due to p-channel MOSFET pass element - simplifies battery life modeling. |
| Foldback current limiting | Reduces current limit to 500mA (pulsed) when VOUT drops below 93% of nominal, protecting during short-circuit or overload events. |
| Thermal shutdown with hysteresis | Turns off at 170°C junction temperature; re-enables after 20°C cooldown - prevents latch-up during sustained overload. |
| Micropower shutdown mode | 0.1µA supply current in shutdown, with OUT and internal circuitry fully disabled - essential for ultra-low-power IoT endpoints. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering RF transceiver analog supply and PLL VCO bias in GSM/UMTS/WCDMA front-end modules. IC Role / Device Role / Timing Role: Low-noise 2.5V LDO providing clean, stable voltage to noise-sensitive RF blocks. Use Value: 42µVRMS noise and 60dB PSRR at 1kHz prevent AM-to-PM conversion and phase noise degradation in transmit paths. |
Use Scenario: Supplying image sensor analog core and ADC reference in compact digital still/video cameras. IC Role / Device Role / Timing Role: Fixed 2.5V regulator delivering regulated rail with minimal ripple for pixel-level analog signal integrity. Use Value: 100mV dropout ensures continued regulation as battery discharges to 2.6V, preserving dynamic range and SNR during capture. |
| PDAs and Palmtop Computers | PCMCIA Cards |
|
Use Scenario: Powering touch-screen controller, audio codec, and flash memory interface in legacy handheld computing devices. IC Role / Device Role / Timing Role: Primary 2.5V system rail LDO with integrated thermal and short-circuit protection. Use Value: 55µA no-load IQ extends standby time between charges; foldback current limiting prevents damage during hot-plug insertion faults. |
Use Scenario: Providing isolated 2.5V supply for card controller logic and interface buffers in PCMCIA Type II/III expansion cards. IC Role / Device Role / Timing Role: Compact, thermally robust LDO meeting tight height constraints (<1mm) of PCMCIA form factor. Use Value: SOT23-5 package fits within 5.5mm card thickness envelope; 727mW max power dissipation supports full-speed data transfer without thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P252MR | 2.5V fixed, 300mA, 150mV dropout at 200mA, 60µA IQ, no BP pin, SOT23-5 | Lacks BP pin → higher output noise (~120µVRMS); no foldback current limiting | Select when noise sensitivity is low and cost is primary; not suitable for RF or precision ADC supplies. |
| Diodes Inc. AP2301W-2.5TRG1 | 2.5V fixed, 300mA, 250mV dropout at 200mA, 80µA IQ, no BP pin, SOT23-5 | Higher dropout and quiescent current; no thermal hysteresis or POK-compatible pinout | Use only in non-battery-critical applications where input headroom >300mV and standby current <1µA is not required. |
Compared with MAX8887EZK25+T, XC6206P252MR offers lower cost but sacrifices 42µVRMS noise performance and foldback protection, while AP2301W-2.5TRG1 trades away both noise and efficiency - making MAX8887EZK25+T the only option meeting stringent low-noise, low-dropout, and micropower requirements simultaneously.
Availability
MAX8887EZK25+T is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, PDAs, PCMCIA cards, and handheld instruments requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8887EZK25+T 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 ultra-low-noise, micropower LDO product line, designed specifically for battery-powered portable electronics where output cleanliness, efficiency, and small size are critical.
FAQ
What is the output voltage tolerance of MAX8887EZK25+T over temperature and load?
The MAX8887EZK25+T guarantees ±3% output voltage accuracy over the full -40°C to +85°C operating temperature range and for load currents from 100µA to 300mA. At +25°C and 100mA load, typical accuracy is ±1.2%. This tolerance ensures reliable operation of 2.5V logic and analog circuits without external trimming or calibration.
Does MAX8887EZK25+T include power-good (POK) functionality?
No, MAX8887EZK25+T does not include a power-good (POK) output. That feature is exclusive to the MAX8888 family (e.g., MAX8888EZK25+T). The MAX8887EZK25+T pinout omits the POK terminal and instead provides the BP (bypass) pin for noise reduction - confirming its role as the low-noise variant within the family.
What capacitor values are required for stable operation of MAX8887EZK25+T?
For stable operation, MAX8887EZK25+T requires a 2.2µF ceramic capacitor (ESR < 0.1Ω) between IN and GND, and another 2.2µF ceramic capacitor between OUT and GND. Additionally, a 0.01µF ceramic capacitor must be placed between BP and GND to achieve the specified 42µVRMS output noise. All capacitors should be placed as close as possible to their respective pins.
How does the thermal shutdown behavior of MAX8887EZK25+T protect the device?
MAX8887EZK25+T activates thermal shutdown at +170°C junction temperature, turning off the pass transistor to halt power dissipation. After cooling by 20°C (to ~150°C), it automatically resumes regulation. This hysteresis prevents oscillation and enables safe, pulsed operation during sustained overload - protecting both the IC and PCB during fault conditions without requiring external intervention.
Can MAX8887EZK25+T be used with input voltages below 2.5V?
No, MAX8887EZK25+T has a minimum input voltage of 2.5V per absolute maximum ratings and electrical specifications. Input undervoltage lockout triggers below ~2.15V (rising), and operation below 2.5V violates the guaranteed performance envelope. For sub-2.5V inputs, a different LDO such as the MAX8860 (1.8V min VIN) would be required.
MAX8887EZK25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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
MAX8887EZK25+T FAQ
1.How can I place an order for MAX8887EZK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK25+T 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 MAX8887EZK25+T reliable?
The price and inventory of MAX8887EZK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK25+T is usually 5 days.
3.What payment methods are accepted for MAX8887EZK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK25+T?
MAX8887EZK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK25+T 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 MAX8887EZK25+T?
For technical support, including MAX8887EZK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK25+T requirements.
6.How does Aetrix verify that MAX8887EZK25+T is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK25+T 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 MAX8887EZK25+T meets industry standards.
7.What is the process for return or replacement of MAX8887EZK25+T?
All MAX8887EZK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK25+T, 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 MAX8887EZK25+T part is unused and in its original packaging.
Return procedure for MAX8887EZK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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