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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 LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
MAX8888EZK15 from Maxim Integrated is a low-dropout linear regulator delivering 1.5V at up to 300mA continuous output, featuring 100mV dropout at 200mA load, open-drain POK flag, and 55µA no-load supply current. It operates from 2.5V–5.5V input and is designed for power management in space-constrained portable electronics including cellular phones and PDAs.
For engineers reviewing the MAX8888EZK15 datasheet, MAX8888EZK15 pinout, MAX8888EZK15 application, or MAX8888EZK15 equivalent, key selection criteria include guaranteed 1.5V output accuracy (±3%), thermal shutdown at 170°C, POK trip threshold at 92.5% of nominal VOUT, and compatibility with 2.2µF ceramic output capacitance for stable regulation.
Technical Context
The MAX8888EZK15 uses an internal P-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling low dropout and load-independent 55µA quiescent current. Its error amplifier compares feedback from an internal 1.25V reference and fixed resistor divider to regulate 1.5V 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% typical hysteresis. Shutdown is controlled by an active-low SHDN pin with 0.6V VIL and 1.6V VIH, drawing only 0.1µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5V ±3% over load (100µA–300mA) and temperature (−40°C to +85°C); enables direct powering of 1.5V logic or analog circuitry without external feedback. |
| Dropout Voltage | 100mV at 200mA load; allows operation down to VIN = 1.6V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Supply Current | 55µA at no load; remains constant regardless of output current, optimizing battery runtime in always-on subsystems. |
| POK Threshold | 92.5% of nominal VOUT (1.3875V) with 1% hysteresis; provides reliable power-fail detection for microcontroller reset sequencing. |
| Thermal Shutdown | Activates at TJ = +170°C with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heat sinking. |
| PSRR | 40dB at 1kHz (COUT = 2.2µF); suppresses ripple from noisy DC-DC converters feeding the LDO input. |
| Shutdown Current | 0.1µA max at VIN = 5.5V; supports ultra-low-power sleep modes in handheld devices. |
Pinout & Package
MAX8888EZK15 is housed in a thin 5-pin SOT23 package (1mm height), optimized for high-density portable PCB layouts. Pin assignments are validated per Maxim's official pin configuration diagram for MAX8888.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass capacitor to GND for stability and transient response. |
| 2 - GND | Ground reference | Common return path for input, output, and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 - SHDN | Active-low enable control | Pulled low to disable regulator; draws <100nA bias current; tolerates up to 6V regardless of VIN/VOUT. |
| 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 to µC reset inputs. |
| 5 - OUT | Regulated 1.5V output | Sources up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 300mA output | Delivers full rated current across −40°C to +85°C ambient, supporting demanding RF or display subsystems without derating. |
| 100mV dropout at 200mA | Enables operation with minimal headroom-e.g., 1.6V input sustains 1.5V output-critical for end-of-battery-life operation. |
| Open-drain POK output | Provides fail-safe power monitoring with programmable delay (via external capacitor) for sequenced system startup. |
| 55µA quiescent current | Minimizes standby power loss in battery-backed real-time clocks or sensor wake-up circuits. |
| Foldback current limiting | Reduces short-circuit current to 420mA when VOUT drops below 93%, lowering thermal stress during fault conditions. |
Applications
| Cellular Phone Baseband | Digital Camera Image Sensor |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks requiring clean, stable 1.5V supply during burst transmission. IC Role / Device Role / Timing Role: Primary LDO supplying core logic voltage with fast load-transient response to handle GSM/EDGE transmit current spikes. Use Value: 100mV dropout ensures uninterrupted operation as Li-ion voltage declines from 4.2V to 3.4V; POK signals µC when VOUT drops below 1.3875V. |
Use Scenario: Biasing CMOS image sensor analog front-end where low noise and precise voltage are critical for image fidelity. IC Role / Device Role / Timing Role: Low-noise 1.5V supply for sensor analog circuitry; not the MAX8887 variant, but benefits from same stable regulation architecture. Use Value: 40dB PSRR at 1kHz suppresses switching noise from adjacent DC-DC converters; ±3% accuracy maintains consistent pixel response. |
| Handheld Medical Monitor | PCMCIA Card Interface |
|
Use Scenario: Providing regulated 1.5V to low-power ADC and signal conditioning circuitry in battery-operated ECG units. IC Role / Device Role / Timing Role: Precision voltage source for analog signal chain; shutdown mode enables long-term battery storage without leakage drain. Use Value: 0.1µA shutdown current extends shelf life; thermal shutdown protects against enclosure overheating during extended use. |
Use Scenario: Supplying 1.5V to PCMCIA card controller logic during hot-insertion and enumeration sequences. IC Role / Device Role / Timing Role: Hot-swap capable LDO with controlled turn-on; POK synchronizes host controller initialization after stable VOUT is achieved. Use Value: POK assertion delay (via external capacitor) ensures firmware waits for full regulation before accessing card registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P152MR | 1.5V fixed output, 300mA, 150mV dropout at 200mA, no POK output, 1µA shutdown current | Lacks power-OK monitoring; suitable where system-level reset is handled externally | Select when POK is unnecessary and lowest possible shutdown current is prioritized over precision POK timing |
| Analog Devices ADP160ACBZ-1.5-R7 | 1.5V fixed output, 150mA max, 195mV dropout at 150mA, no POK, 570nA shutdown current | Lower current rating and higher dropout limit use to low-power peripherals only | Choose only for sub-150mA loads where ultra-low IQ (570nA) outweighs need for 300mA capability and POK |
Compared with MAX8888EZK15, XC6206P152MR offers lower shutdown current but omits POK functionality, while ADP160ACBZ-1.5-R7 trades 300mA capability and POK for nanoscale quiescent current-making MAX8888EZK15 the sole option when both high-current delivery and integrated power monitoring are required.
Availability
MAX8888EZK15 is available at Aetrix Electronics and suitable for cellular handsets, portable medical monitors, digital cameras, and PCMCIA interface designs requiring stable component supply, long-lifecycle support, and guaranteed 1.5V regulation performance.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8888EZK15 belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment demanding low quiescent current, tight output accuracy, and integrated power-good monitoring.
FAQ
What is the output voltage tolerance of MAX8888EZK15 over temperature and load?
The MAX8888EZK15 guarantees ±3% output voltage accuracy across the full operating range: load current from 100µA to 300mA and ambient temperature from −40°C to +85°C. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions explicitly referencing IOUT = 100µA to 300mA and TA = 0°C to +85°C. The MAX8888EZK15 achieves this using a trimmed internal resistor divider and 1.25V bandgap reference.
Does MAX8888EZK15 require an external bypass capacitor on the BP pin?
No, the BP (bypass) pin is specific to the MAX8887 variant and used for noise reduction with a 0.01µF capacitor. The MAX8888EZK15 does not incorporate the BP pin or associated low-noise architecture; its pin 4 is POK, not BP. Therefore, no BP capacitor is needed or supported for MAX8888EZK15-only standard 2.2µF input and output ceramic capacitors are required.
What is the minimum input voltage required for MAX8888EZK15 to maintain regulation at 300mA load?
At 300mA load, the MAX8888EZK15 exhibits a typical dropout voltage of 150mV (per Electrical Characteristics table). To sustain 1.5V output, the minimum input voltage is therefore 1.5V + 0.15V = 1.65V. However, the device's absolute minimum input voltage specification is 2.5V-meaning operation below 2.5V is outside guaranteed specifications, even if dropout margin appears sufficient. Thus, MAX8888EZK15 requires VIN ≥ 2.5V at all times.
How does the POK output behave during shutdown of MAX8888EZK15?
When SHDN is pulled low, the MAX8888EZK15 enters shutdown mode and actively drives both OUT and POK low. This behavior is explicitly documented in the Pin Description section: "In shutdown, POK and OUT are driven low." The POK pin remains low regardless of output voltage level during shutdown, providing a deterministic reset signal to downstream logic until SHDN is released.
Can MAX8888EZK15 be used with ceramic output capacitors having ESR above 0.1Ω?
No-MAX8888EZK15 requires an output capacitor with ESR ≤ 0.1Ω to ensure stability and optimal transient response, as stated in the Applications Information section. Using higher-ESR capacitors (e.g., tantalum or aluminum electrolytic) risks oscillation or excessive output voltage deviation during load steps. The datasheet specifically recommends surface-mount ceramic capacitors (e.g., 2.2µF X5R/X7R) due to their inherently low ESR and wide availability up to 10µF.
MAX8888EZK15 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):
- 1.5V
- 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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