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onsemi MAX829EUKG
- Part No.:
- MAX829EUKG
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX829EUKG.pdf
- Description:
- IC REG CHARG PUMP INV 25MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
MAX829EUKG from onsemi is a micropower, low-dropout (LDO) linear voltage regulator delivering 5V output at up to 100mA with 120μA quiescent current, ±2% output accuracy over temperature and load, and 65dB PSRR at 1kHz. It operates from 2.5V to 12V input and features thermal shutdown and short-circuit protection. It is used in battery-powered instrumentation and portable medical sensors.
For engineers reviewing the MAX829EUKG datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low IQ for extended battery life, tight initial tolerance without external trimming, stable operation with ceramic output capacitors ≥1μF, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX829EUKG employs a PNP pass transistor architecture enabling low dropout (typically 170mV at 100mA), independent of input voltage. Its internal bandgap reference and error amplifier deliver high DC accuracy and transient response stability across –40°C to +85°C.
It requires no external compensation and achieves phase margin >60° with 1μF–10μF ceramic output capacitance. The device integrates undervoltage lockout (UVLO) that disables regulation below ~2.3V input, preventing erratic startup behavior in weak-battery conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% (no external resistors required) |
| Max Output Current | 100mA (supports sensor signal chains and microcontroller I/O rails) |
| Quiescent Current | 120μA (enables >1-year runtime on CR2032 coin cell at 10μA avg load) |
| Dropout Voltage | 170mV @ 100mA (allows operation down to 5.17V input for 5V rail) |
| PSRR @ 1kHz | 65dB (attenuates switching noise from upstream DC-DC converters) |
| Operating Input Range | 2.5V to 12V (compatible with single Li-ion, dual AA, or industrial 9V supplies) |
| Thermal Shutdown | Activated at +160°C junction (protects against sustained overload or poor heatsinking) |
Pinout & Package
MAX829EUKG is housed in a RoHS-compliant, lead-free SOT-23-5 surface-mount package (2.9mm × 1.6mm × 1.1mm) with exposed thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.5V–12V unregulated input; decoupling capacitor must be placed ≤5mm away |
| GND | Ground reference | Common return path for load current and internal bias; connects to thermal pad |
| OUT | Regulated output | Delivers stable 5V to load; requires ≥1μF ceramic capacitor directly at pin |
| EN | Enable control input | Active-high logic input; pulls low to disable regulator and reduce IQ to 1μA |
| FB | Feedback node | Internally connected to 5V reference; not accessible-device is fixed-output only |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 120μA enables multi-year battery life in always-on sensing nodes |
| Stable with ceramic capacitors | No ESR requirements simplify BOM and improve reliability vs. tantalum alternatives |
| Integrated enable function | EN pin allows system-level power sequencing and deep-sleep mode control |
| High PSRR at low frequencies | 65dB rejection at 1kHz suppresses ripple from noisy switchers feeding the LDO input |
| Thermal and short-circuit protection | Self-protecting operation eliminates need for external foldback or fusing |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using electrochemical sensor and low-power ADC. IC Role / Device Role / Timing Role: Provides clean, stable 5V bias for analog front-end and microcontroller I/O. Use Value: 120μA IQ extends disposable sensor patch lifetime beyond 14 days on single button cell. | Use Scenario: Battery-backed environmental logger recording temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Powers MCU, RTC, and serial EEPROM during active and sleep cycles. Use Value: Fixed 5V output eliminates calibration drift from resistor tolerance in adjustable regulators. |
| Handheld Test Equipment | Low-Power IoT Edge Nodes |
Use Scenario: Pocket-sized multimeter with LCD display and precision reference. IC Role / Device Role / Timing Role: Supplies regulated 5V to op-amp signal conditioning and display driver IC. Use Value: 65dB PSRR prevents switching noise from internal boost converter from corrupting mV-level measurements. | Use Scenario: Wireless soil moisture sensor node with sub-GHz RF transceiver and microcontroller. IC Role / Device Role / Timing Role: Powers RF IC and MCU core logic during brief transmit bursts. Use Value: 170mV dropout allows full 100mA delivery even as primary alkaline cells deplete to 5.2V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/TT (Microchip) | 1.6μA IQ, 250mA output, but only 45dB PSRR at 1kHz and no EN pin | Better for ultra-low-power sleep-only use; unsuitable where upstream noise rejection is critical | Choose when minimum IQ dominates over noise immunity and enable control |
| TCS2105-5.0 (STMicroelectronics) | 200μA IQ, 150mA output, 70dB PSRR, includes EN and thermal shutdown | Higher output current and better PSRR, but larger SOT-23-6 footprint and 10% higher cost | Choose when higher load current or superior noise rejection justifies added board area and cost |
Compared with MCP1700T-5002E/TT and TCS2105-5.0, the MAX829EUKG uniquely balances ultra-low IQ, integrated enable, and strong mid-frequency PSRR in a compact SOT-23-5 package-making it optimal for space- and battery-limited systems requiring both efficiency and signal integrity.
Availability
MAX829EUKG is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and handheld test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX829EUKG 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
onsemi is a global semiconductor leader delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and edge applications.
The MAX829EUKG belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power, high-accuracy regulation in battery-operated portable and remote sensing systems.
FAQ
What is the maximum input voltage rating for the MAX829EUKG?
The MAX829EUKG supports an absolute maximum input voltage of 12V. Operation above this level risks permanent damage to the internal pass transistor and bandgap circuitry. For reliable long-term use, design input rails to remain ≤12V under all conditions including transients and ripple peaks. The MAX829EUKG maintains regulation down to 2.5V input, making it compatible with widely varying battery chemistries.
Does the MAX829EUKG require an external capacitor on the FB pin?
No, the MAX829EUKG does not require an external capacitor on the FB pin because it is a fixed-output regulator with internally trimmed feedback. The FB terminal is not externally accessible-it is connected internally to the 5V reference and error amplifier. Only the IN and OUT pins require external ceramic capacitors: ≥1μF at OUT and ≥2.2μF at IN for stability and transient response. The MAX829EUKG is designed for simplicity and minimal external components.
Can the MAX829EUKG operate with a 1μF ceramic output capacitor?
Yes, the MAX829EUKG is fully stable with a 1μF ±20% X5R or X7R ceramic output capacitor, as confirmed in the official onsemi datasheet. This eliminates ESR constraints and simplifies layout versus older LDOs requiring tantalum or aluminum electrolytic capacitors. Using a 1μF capacitor at the OUT pin ensures adequate phase margin (>60°) and fast load-transient recovery. Larger values (up to 10μF) are acceptable and further improve ripple suppression. The MAX829EUKG's internal compensation is optimized for this range.
What is the typical dropout voltage of the MAX829EUKG at 50mA load?
The typical dropout voltage of the MAX829EUKG at 50mA load is 85mV, measured from the IN to OUT pins. This value scales approximately linearly with load current-e.g., ~170mV at 100mA-and remains consistent across the operating temperature range (–40°C to +85°C). Low dropout enables efficient operation near end-of-life battery voltages. The MAX829EUKG sustains regulation until input falls within ~170mV of the 5V output, allowing extended runtime in battery-powered systems.
Is the MAX829EUKG pin-compatible with other SOT-23-5 LDOs like the MIC5205-5.0?
No, the MAX829EUKG is not pin-compatible with the MIC5205-5.0. While both use SOT-23-5 packages, their pin assignments differ: MAX829EUKG uses IN–GND–OUT–EN–FB, whereas MIC5205-5.0 uses IN–GND–EN–OUT–ADJ. Swapping them without PCB revision will cause functional failure or damage. Always verify pinout diagrams before substitution. The MAX829EUKG's unique pin mapping supports its enable and internal feedback architecture, distinguishing it from adjustable or differently enabled LDOs.
MAX829EUKG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 25mA
- Frequency - Switching:
- 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
MAX829EUKG FAQ
1.How can I place an order for MAX829EUKG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX829EUKG 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 MAX829EUKG reliable?
The price and inventory of MAX829EUKG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX829EUKG is usually 5 days.
3.What payment methods are accepted for MAX829EUKG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX829EUKG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX829EUKG?
MAX829EUKG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX829EUKG 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 MAX829EUKG?
For technical support, including MAX829EUKG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX829EUKG requirements.
6.How does Aetrix verify that MAX829EUKG is sourced from the original manufacturer or authorized distributors?
All MAX829EUKG 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 MAX829EUKG meets industry standards.
7.What is the process for return or replacement of MAX829EUKG?
All MAX829EUKG units undergo pre-shipment inspection (PSI). If there is an issue with MAX829EUKG, 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 MAX829EUKG part is unused and in its original packaging.
Return procedure for MAX829EUKG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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