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Analog Devices Inc./Maxim Integrated MAX8887EZK18
- Part No.:
- MAX8887EZK18
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK18.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,766
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Product details
Overview
MAX8887EZK18 from Maxim Integrated is a low-noise, 1.8V fixed-output, 300mA low-dropout linear regulator in SOT23-5 package, featuring 100mV dropout at 200mA, 42µVRMS output noise, and 55µA no-load supply current. It delivers stable voltage for power-sensitive analog and RF circuitry in portable battery-powered systems such as cellular handsets and PDAs.
For engineers reviewing the MAX8887EZK18 datasheet, MAX8887EZK18 pinout, MAX8887EZK18 application, or MAX8887EZK18 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative regulators with documented functional and packaging differences.
Technical Context
The MAX8887EZK18 uses an internal p-channel MOSFET pass transistor (RDS(ON) ≈ 0.5Ω) to achieve ultra-low quiescent current independent of load - 55µA at full 300mA and 0.1µA in shutdown. Its BP pin enables external 0.01µF capacitor filtering to suppress reference noise, directly enabling its 42µVRMS output noise performance.
It operates across 2.5V–5.5V input range with guaranteed ±2% output voltage accuracy over 0°C to +85°C and ±3% over full –40°C to +85°C range. Thermal shutdown activates at +170°C with 20°C hysteresis, and foldback current limiting engages when VOUT drops below 93% of nominal, protecting during short-circuit or overload events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% (TA = +25°C); ±3% over –40°C to +85°C - ensures stable core voltage for 1.8V logic and RF ICs without external feedback. |
| Max Output Current | 300mA continuous, 500mA pulsed - supports burst-mode operation in GSM/EDGE transceivers and camera flash drivers. |
| Dropout Voltage | 100mV at 200mA load - extends usable battery life down to ~2.0V input for single-cell Li-ion or Li-poly systems. |
| Output Noise | 42µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 2.2µF) - meets low-noise requirements for ADC references and RF synthesizers. |
| Quiescent Current | 55µA at no load, 65µA at 300mA - preserves battery runtime in always-on sensor nodes and standby circuits. |
| PSRR | 60dB at 1kHz (CBP = 0.01µF, COUT = 4.7µF) - rejects switching noise from DC-DC converters feeding intermediate rails. |
| Shutdown Current | 0.1µA typical - enables µA-level system sleep states in portable devices. |
Pinout & Package
Package: 5-pin SOT23, 1mm height, RoHS-compliant (lead-free), top-mark ADPX.
| 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 ≤0.6V to enter 0.1µA shutdown; pulled high ≥1.6V (or tied to IN) for normal operation. |
| 4 - BP | Reference bypass terminal | Connects to 0.01µF low-leakage ceramic capacitor to reduce internal reference noise - essential for 42µVRMS spec. |
| 5 - OUT | Regulated output | Delivers up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | BP pin + 0.01µF capacitor reduces reference noise, enabling 42µVRMS output - critical for precision analog and RF signal chains. |
| p-Channel MOSFET pass element | Eliminates base-drive current; maintains 55µA quiescent current across full 0–300mA load range - unlike PNP-based LDOs. |
| Foldback current limiting | Reduces current limit to 500mA (from 800mA typ) when VOUT falls below 93% of 1.8V - prevents thermal runaway during output shorts. |
| Thermal shutdown with hysteresis | Shuts down at +170°C junction temp and re-enables only after cooling by 20°C - enables safe, self-recovering fault handling. |
| Ultra-thin SOT23-5 package | 1mm height allows integration into space-constrained handheld PCBs while maintaining thermal performance up to 727mW at +70°C ambient. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering RF transceiver VCOs and PLLs requiring ultra-low noise and tight voltage regulation. IC Role / Device Role / Timing Role: Low-noise 1.8V LDO supplying clean bias to frequency synthesis blocks. Use Value: 42µVRMS noise and 60dB PSRR at 1kHz prevent phase noise degradation and maintain EVM compliance. |
Use Scenario: Supplying image sensor analog front-end (AFE) and ADC reference rails during high-speed capture bursts. IC Role / Device Role / Timing Role: Stable 1.8V source with fast load-transient response for pixel readout timing. Use Value: 100mV dropout at 200mA and 10µs transient recovery enable reliable operation even as battery voltage sags under pulse loads. |
| PDAs and Palmtop Computers | PCMCIA Cards |
|
Use Scenario: Providing core voltage to low-power microcontrollers and memory interfaces in always-on portable computing. IC Role / Device Role / Timing Role: Primary 1.8V rail generator with micropower shutdown for system-level power management. Use Value: 0.1µA shutdown current and 55µA operating current extend battery life in suspend/resume cycles. |
Use Scenario: Regulating 1.8V I/O voltage for hot-pluggable PCMCIA cards interfacing with host laptops. IC Role / Device Role / Timing Role: Input-tolerant LDO (2.5V–5.5V) with robust undervoltage lockout (2.4V threshold). Use Value: 2.15V–2.4V UVLO hysteresis prevents brownout oscillation during card insertion/removal transients. |
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 XC6206P182MR | 1.8V fixed, 300mA, 150mV dropout at 200mA, 60µA IQ, no BP pin - higher noise (~120µVRMS), no reference bypass option. | Lacks BP pin and low-noise optimization; unsuitable for RF/ADC applications requiring <50µVRMS. | Select when cost sensitivity outweighs noise performance and BP functionality is unnecessary. |
| Analog Devices ADP121-AUJZ-1.8-R7 | 1.8V fixed, 150mA, 135mV dropout at 150mA, 30µA IQ, no BP pin - lower current rating, no noise-specification path. | Rated only for 150mA; insufficient for 300mA pulsed loads in camera flash or modem transmit stages. | Choose only for low-current, space-constrained applications where 300mA capability is not required. |
Compared with XC6206P182MR and ADP121-AUJZ-1.8-R7, the MAX8887EZK18 uniquely delivers 300mA capability *together with* 42µVRMS noise via its BP pin - making it the sole option among these three for noise-critical, high-current 1.8V rails.
Availability
MAX8887EZK18 is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, and PDAs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8887EZK18 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, automotive, and portable applications.
The MAX8887EZK18 belongs to the MAX8887 family of low-noise, micropower LDOs engineered specifically for battery-powered RF and portable computing systems where noise, efficiency, and small size are critical.
FAQ
What is the output voltage tolerance of the MAX8887EZK18 over temperature?
The MAX8887EZK18 guarantees ±2% output voltage accuracy at TA = +25°C and ±3% over the full –40°C to +85°C operating temperature range. This is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with conditions specified for IOUT = 100µA to 300mA and full temperature span. The MAX8887EZK18 maintains tight regulation without external trimming components.
Does the MAX8887EZK18 include a power-OK (POK) output?
No, the MAX8887EZK18 does not include a POK output. That feature is exclusive to the MAX8888 variant (e.g., MAX8888EZK18). The MAX8887EZK18 pinout omits the POK pin and instead includes the BP (bypass) pin for noise reduction - a key differentiator between the two families. Pin 4 on the MAX8887EZK18 is BP, not POK.
What capacitor values are required for stable operation of the MAX8887EZK18?
The MAX8887EZK18 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 low-leakage ceramic capacitor must be placed at the BP pin to achieve the specified 42µVRMS output noise. All capacitors must be placed as close as possible to their respective pins to minimize trace inductance.
What is the maximum allowable power dissipation for the MAX8887EZK18 in SOT23-5 package?
The MAX8887EZK18 has a maximum continuous power dissipation of 727mW at TA = +70°C, with derating of 9.1mW/°C above that temperature. This value assumes standard PCB layout per JEDEC standards; actual dissipation depends on board copper area and airflow. Exceeding this limit risks triggering thermal shutdown at +170°C junction temperature.
How does the MAX8887EZK18 achieve low dropout voltage?
The MAX8887EZK18 achieves low dropout voltage using an internal p-channel MOSFET pass transistor with RDS(ON) ≈ 0.5Ω. Dropout is calculated as VDROP = RDS(ON) × ILOAD, yielding 100mV at 200mA. Unlike NPN/PNP-based LDOs, the p-MOSFET requires no base/gate drive current, preserving low quiescent current even near dropout - a key advantage of the MAX8887EZK18 architecture.
MAX8887EZK18 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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
MAX8887EZK18 FAQ
1.How can I place an order for MAX8887EZK18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK18 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 MAX8887EZK18 reliable?
The price and inventory of MAX8887EZK18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK18 is usually 5 days.
3.What payment methods are accepted for MAX8887EZK18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK18?
MAX8887EZK18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK18 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 MAX8887EZK18?
For technical support, including MAX8887EZK18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK18 requirements.
6.How does Aetrix verify that MAX8887EZK18 is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK18 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 MAX8887EZK18 meets industry standards.
7.What is the process for return or replacement of MAX8887EZK18?
All MAX8887EZK18 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK18, 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 MAX8887EZK18 part is unused and in its original packaging.
Return procedure for MAX8887EZK18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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