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Analog Devices Inc./Maxim Integrated MAX8888EZK15+
- Part No.:
- MAX8888EZK15+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK15+.pdf
- Description:
- IC REG LIN 1.5V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,123
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Product details
Overview
MAX8888EZK15+ from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output at a fixed 1.5V output voltage, operating from 2.5V to 5.5V input, with 100mV dropout at 200mA load and integrated open-drain power-OK (POK) flag for system monitoring in portable battery-powered devices.
For engineers reviewing the MAX8888EZK15+ datasheet, MAX8888EZK15+ pinout, MAX8888EZK15+ application, or MAX8888EZK15+ equivalent, key selection considerations include guaranteed 1.5V output accuracy (±3%), POK threshold at 92.5% of nominal output, 55µA no-load quiescent current, and thermal shutdown at +170°C - all critical for space-constrained, low-power embedded systems.
Technical Context
The MAX8888EZK15+ uses an internal p-channel MOSFET pass transistor with ~0.5Ω RDS(ON), enabling ultra-low quiescent current independent of load and eliminating base-drive losses typical of PNP-based LDOs. Its error amplifier compares feedback from an internal 1.25V reference and fixed resistor divider to regulate output.
POK functionality is implemented via an open-drain n-channel output that asserts low when VOUT falls below 92.5% of 1.5V (i.e., ≤1.3875V), with 1% hysteresis and valid operation down to 1.0V input. Shutdown is active-low, reducing supply current to 0.1µA while forcing both OUT and POK low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±3% over load (100µA–300mA) and temperature (−40°C to +85°C) |
| Max Continuous Output Current | 300mA - sufficient to power core logic or RF sections in handheld devices without derating at +70°C |
| Dropout Voltage | 100mV at 200mA - enables regulation down to VIN = 1.6V, extending usable battery life in single-cell Li-ion or Li-poly systems |
| Quiescent Current | 55µA at no load - maintains efficiency during standby in always-on subsystems |
| POK Threshold Accuracy | 92.5% of nominal VOUT (±2.5%) - ensures reliable power-good assertion before microcontroller initialization |
| Thermal Shutdown | Activates at +170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design |
| Shutdown Current | 0.1µA max - supports multi-week shelf life in battery-backed applications |
Pinout & Package
MAX8888EZK15+ is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (1mm height), optimized for high-density portable PCB layouts.
| 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 | Common return path for IN, OUT, SHDN, and POK; must be low-impedance for noise control |
| 3 - SHDN | Active-low enable control | Pulled low to enter 0.1µA shutdown; driven high (≥1.6V) or tied to IN for normal operation |
| 4 - POK | Open-drain power-OK flag | Drives low when VOUT < 1.3875V; requires external pullup (e.g., 100kΩ to OUT) for logic-level signaling |
| 5 - OUT | Regulated output | Delivers up to 300mA at 1.5V; bypassed with 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET pass element | Enables 55µA quiescent current independent of load - critical for battery runtime in sleep modes |
| Integrated POK with hysteresis | Provides deterministic, glitch-free power-good signaling for µC reset sequencing without external comparators |
| Foldback current limiting | Reduces short-circuit current to 420mA when VOUT drops below 93%, lowering thermal stress during faults |
| Thermal shutdown with hysteresis | Auto-recovers after 20°C cooldown, enabling fault-tolerant operation in thermally constrained enclosures |
| Low-noise compatible BP pin | Supports optional 0.01µF bypass on BP (not used in MAX8888) - reserved for family compatibility with MAX8887 variants |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and camera sensor interface circuitry in dual-SIM smartphones. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying digital core logic with tight voltage tolerance and fast load-transient response. Use Value: 100mV dropout extends usable battery range by ~150mV per cell, directly increasing talk time in Li-ion systems. |
Use Scenario: Supplying image signal processor (ISP) core voltage in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Stable 1.5V source with POK flag ensuring clean ISP power-up before frame capture initialization. Use Value: POK output eliminates need for external supervisor IC, reducing BOM count and PCB area by ~3mm². |
| Notebook Computers | Hand-Held Instruments |
|
Use Scenario: Biasing USB PHY transceivers and PCIe endpoint logic in ultraportable notebooks. IC Role / Device Role / Timing Role: Low-quiescent-current LDO delivering regulated 1.5V with minimal self-heating near sensitive analog sections. Use Value: 55µA no-load current reduces standby power draw by >90% versus legacy bipolar LDOs, improving battery longevity. |
Use Scenario: Powering precision ADC front-end and microcontroller peripherals in battery-operated multimeters. IC Role / Device Role / Timing Role: Regulator with thermal protection and shutdown control enabling safe operation during extended field measurements. Use Value: Thermal hysteresis prevents oscillation during ambient temperature swings, ensuring stable readings without user intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2015PDBVR | Lower 6.5µA quiescent current but no POK output; 1.5V output accuracy ±1.5% (tighter than MAX8888EZK15+'s ±3%) | Lacks integrated power-good signaling - requires external supervisor for reset sequencing | Select when ultra-low IQ dominates over system monitoring needs and board space permits added discrete components |
| MCP1700T-1502E/TT | Higher 175mV dropout at 250mA; no thermal shutdown or foldback current limiting; 4µA IQ | Not suitable for thermally dense layouts or fault-prone environments without external protection | Choose only for cost-sensitive, non-safety-critical applications where full protection features are omitted |
Compared with TPS7A2015PDBVR and MCP1700T-1502E/TT, the MAX8888EZK15+ uniquely integrates POK, thermal shutdown, and foldback limiting in a 5-pin SOT23 - enabling robust, space-efficient power management without external components in portable designs.
Availability
MAX8888EZK15+ is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, and notebook computers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8888EZK15+ 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 MAX8887/MAX8888 product line delivers low-noise, low-IQ LDOs with integrated monitoring features - engineered specifically for battery-powered consumer electronics where size, efficiency, and reliability are co-constrained.
FAQ
What is the output voltage tolerance of the MAX8888EZK15+ across temperature and load?
The MAX8888EZK15+ maintains a fixed 1.5V output with ±3% accuracy over the full −40°C to +85°C operating temperature range and for output currents from 100µA to 300mA. This specification is guaranteed by design and verified across production lots, ensuring consistent performance in portable equipment exposed to wide ambient conditions. The MAX8888EZK15+ achieves this using a trimmed internal resistor divider and a stable 1.25V bandgap reference.
Does the MAX8888EZK15+ require an external bypass capacitor on the BP pin?
No, the MAX8888EZK15+ does not use the BP (bypass) pin - it is reserved for the MAX8887 variant, which employs it for noise reduction. The MAX8888EZK15+ pinout omits BP functionality; Pin 4 is POK, and Pin 2 is GND. Therefore, no capacitor is needed or recommended on BP for the MAX8888EZK15+, and connecting anything to that location would be incorrect per the functional diagram and pin description.
What is the minimum input voltage required for regulation at full 300mA load?
At 300mA load, the MAX8888EZK15+ requires a minimum input voltage of 1.65V to maintain regulation - calculated from its maximum dropout voltage of 150mV (per Electrical Characteristics table, VOUT = +3.3V condition, scaled for 1.5V output). For guaranteed 100mV dropout (typical), VIN ≥ 1.6V suffices. This enables operation down to near end-of-discharge in single-cell Li-ion batteries, extending usable runtime.
How does the POK output behave during shutdown of the MAX8888EZK15+?
During shutdown (SHDN = GND), the MAX8888EZK15+ actively drives both OUT and POK low - regardless of input voltage or output state. This behavior is explicitly defined in the datasheet's Detailed Description section and ensures deterministic system reset sequencing. The POK pin remains low-impedance until SHDN is released, providing unambiguous power-fail signaling to host controllers even when the regulator is disabled.
Can the MAX8888EZK15+ be used with ceramic output capacitors having ESR above 0.1Ω?
No - the MAX8888EZK15+ requires an output capacitor with ESR ≤ 0.1Ω to ensure stability and optimal transient response, as stated in the Applications Information section. Ceramic capacitors meeting this spec (e.g., X5R/X7R 2.2µF, 0805 or larger) are recommended. Higher-ESR capacitors (e.g., tantalum or older ceramic types) risk oscillation, overshoot, or degraded PSRR, and are not supported by the device's compensation architecture.
MAX8888EZK15+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 40dB (1kHz)
- Control Features:
- Enable, Power Good
- 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
MAX8888EZK15+ FAQ
1.How can I place an order for MAX8888EZK15+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK15+ 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 MAX8888EZK15+ reliable?
The price and inventory of MAX8888EZK15+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK15+ is usually 5 days.
3.What payment methods are accepted for MAX8888EZK15+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK15+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK15+?
MAX8888EZK15+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK15+ 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 MAX8888EZK15+?
For technical support, including MAX8888EZK15+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK15+ requirements.
6.How does Aetrix verify that MAX8888EZK15+ is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK15+ 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 MAX8888EZK15+ meets industry standards.
7.What is the process for return or replacement of MAX8888EZK15+?
All MAX8888EZK15+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK15+, 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 MAX8888EZK15+ part is unused and in its original packaging.
Return procedure for MAX8888EZK15+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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