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Analog Devices Inc./Maxim Integrated MAX8887EZK29-T
- Part No.:
- MAX8887EZK29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK29-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:11,205
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Product details
Overview
MAX8887EZK29-T from Maxim Integrated is a low-noise, 300mA low-dropout linear regulator with 2.9V fixed output voltage, 100mV dropout at 200mA, 55µA no-load supply current, and 42µVRMS output noise - designed for power-sensitive portable applications including cellular handsets and PDAs.
For engineers reviewing the MAX8887EZK29-T datasheet, MAX8887EZK29-T pinout, MAX8887EZK29-T application, or MAX8887EZK29-T equivalent, this page delivers verified electrical specs, SOT23-5 pin mapping, thermal/short-circuit protection behavior, and validated alternative options for battery-powered system design.
Technical Context
The MAX8887EZK29-T uses an internal PMOS pass transistor to achieve ultra-low quiescent current independent of load - enabling stable 2.9V regulation down to 2.5V input while maintaining 100mV dropout at 200mA. Its BP pin supports 0.01µF bypass capacitor for noise filtering, yielding 42µVRMS output noise (10Hz–100kHz).
It integrates micropower shutdown (0.1µA), foldback current limiting (420mA typical), thermal shutdown at +170°C with 20°C hysteresis, and ±2% output voltage accuracy across -40°C to +85°C - all in a 1mm-high 5-pin SOT23 package optimized for space-constrained PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±2% over full temperature/load range - ensures stable core voltage for 2.85V–3.0V logic rails. |
| Max Output Current | 300mA continuous / 500mA pulsed - supports burst-mode processors and RF transceivers without thermal derating. |
| Dropout Voltage | 100mV at 200mA - extends usable battery life by regulating down to VIN = 3.0V for 2.9V output. |
| Ground Pin Current | 55µA no-load, ≤100µA at 200mA - minimizes standby power loss in always-on subsystems. |
| Output Noise | 42µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets low-noise requirements for ADC references and RF LDO stages. |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Shutdown Current | 0.1µA - enables deep-sleep modes in portable devices with multi-day battery retention. |
Pinout & Package
MAX8887EZK29-T is housed in a thin-profile 5-pin SOT23 package (1mm height, Z5-1 footprint), RoHS-compliant and rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V input; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Power ground reference | Common return path for input/output capacitors and internal circuitry; must be low-impedance. |
| 3 - SHDN | Active-low enable control | Pull low to enter 0.1µA shutdown; connect to IN for normal operation; tolerates up to 6V logic high. |
| 4 - BP | Reference bypass terminal | Connects 0.01µF ceramic capacitor to reduce reference noise - essential for achieving 42µVRMS output noise. |
| 5 - OUT | Regulated output | Delivers 2.9V ±2% at up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 42µVRMS output noise enabled by dedicated BP pin and 0.01µF capacitor - critical for analog/RF power domains. |
| PMOS pass transistor | 0.5Ω RDS(ON) eliminates base-drive current - maintains 55µA quiescent current even at full 300mA load and in dropout. |
| Foldback current limiting | Reduces current limit to 500mA when VOUT drops below 93% of nominal - protects against sustained short-circuit faults. |
| Thermal protection | Shuts down at +170°C junction temperature with 20°C hysteresis - prevents permanent damage during overload or poor heatsinking. |
| High PSRR at low frequency | 60dB rejection at 1kHz - effectively filters ripple from switcher outputs feeding the LDO input rail. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS smartphones with Li-ion battery input (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 2.9V LDO supplying CPU I/O and memory interface circuits requiring low noise and fast transient response. Use Value: 100mV dropout extends usable battery range to 3.0V, while 42µVRMS noise prevents ADC quantization errors in camera sensor signal chain. |
Use Scenario: Supplying image sensor analog front-end and ISP core in compact digital cameras with intermittent high-current bursts. IC Role / Device Role / Timing Role: Low-noise, pulsed-capable LDO delivering regulated 2.9V during exposure and readout phases. Use Value: 500mA pulsed current capability handles sensor frame-rate peaks without dropout, and 0.1µA shutdown enables instant-on wake-up from sleep mode. |
| PDAs and Palmtop Computers | PCMCIA Cards |
|
Use Scenario: Providing clean 2.9V rail to ARM-based application processor and touch controller in handheld PDAs. IC Role / Device Role / Timing Role: Main system LDO with micropower shutdown for suspend-to-RAM states and real-time clock backup. Use Value: 55µA no-load current minimizes battery drain during multi-hour idle periods, and ±2% accuracy ensures reliable boot sequencing. |
Use Scenario: Regulating 2.9V for PCMCIA card logic and interface buffers in laptop expansion slots with variable host supply conditions. IC Role / Device Role / Timing Role: Isolated, fault-protected LDO decoupling card electronics from noisy host bus power. Use Value: Thermal and short-circuit protection prevent card failure during hot-plug events; 60dB PSRR rejects host DC/DC switching noise. |
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 |
|---|---|---|---|
| TPS79529DBVR | 2.9V fixed, 250mA, 170mV dropout at 200mA, 30µVRMS noise, SOT23-5 | Lower max current and higher dropout - suitable only for lighter loads where board space allows trade-off in thermal margin. | Select if lower noise (30µVRMS) is prioritized over current capability and dropout performance. |
| MCP1702T-2902E/MB | 2.9V fixed, 250mA, 600mV dropout at 250mA, 40µVRMS noise, SOT23-5 | Higher dropout and lower current limit - limited to non-battery-critical or higher-VIN applications (e.g., 5V rail). | Choose only when cost sensitivity outweighs efficiency and battery-life requirements. |
Compared with TPS79529DBVR and MCP1702T-2902E/MB, the MAX8887EZK29-T delivers superior 300mA current drive, lowest 100mV dropout, and best-in-class 42µVRMS noise - making it the optimal choice for high-efficiency, noise-sensitive portable designs where runtime and signal integrity are critical.
Availability
MAX8887EZK29-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 sourcing.
Supply support for MAX8887EZK29-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 markets.
The MAX8887 series belongs to Maxim's precision low-noise LDO family, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, tight output regulation, and minimal output noise.
FAQ
What is the exact output voltage tolerance of the MAX8887EZK29-T over temperature and load?
The MAX8887EZK29-T guarantees ±2% output voltage accuracy across the full operating range of -40°C to +85°C and for load currents from 100µA to 300mA. At +25°C and 100mA load, the tolerance tightens to ±1.2%. This specification ensures reliable operation for 2.85V–2.95V logic interfaces without external trimming.
Does the MAX8887EZK29-T include power-good (POK) functionality?
No, the MAX8887EZK29-T does not include a POK output. That feature is exclusive to the MAX8888 family variants (e.g., MAX8888EZK29+T). The MAX8887EZK29-T is the low-noise version and substitutes the POK pin with a BP (bypass) pin for noise reduction - confirmed by its pinout diagram and functional description in the datasheet.
What capacitor values and types are required for stable operation of the MAX8887EZK29-T?
The MAX8887EZK29-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 on 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.
How does thermal protection behave during continuous overload on the MAX8887EZK29-T?
When the MAX8887EZK29-T junction temperature exceeds +170°C, its thermal sensor disables the PMOS pass transistor. After cooling by 20°C (to ~150°C), the device automatically resumes regulation - resulting in pulsed output during sustained overload. This hysteresis prevents latch-up and allows safe recovery without manual reset, protecting both the IC and downstream circuitry.
Is the MAX8887EZK29-T RoHS-compliant and lead-free?
Yes, the MAX8887EZK29-T is RoHS-compliant and lead-free, as indicated by the "+T" suffix in its ordering code per Maxim's official documentation. It meets EU Directive 2011/65/EU and is manufactured using lead-free solderable terminations compatible with standard reflow profiles.
MAX8887EZK29-T 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):
- 2.85V
- 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
MAX8887EZK29-T FAQ
1.How can I place an order for MAX8887EZK29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK29-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 MAX8887EZK29-T reliable?
The price and inventory of MAX8887EZK29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK29-T is usually 5 days.
3.What payment methods are accepted for MAX8887EZK29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK29-T?
MAX8887EZK29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK29-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 MAX8887EZK29-T?
For technical support, including MAX8887EZK29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK29-T requirements.
6.How does Aetrix verify that MAX8887EZK29-T is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK29-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 MAX8887EZK29-T meets industry standards.
7.What is the process for return or replacement of MAX8887EZK29-T?
All MAX8887EZK29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK29-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 MAX8887EZK29-T part is unused and in its original packaging.
Return procedure for MAX8887EZK29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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