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Microchip Technology MIC5325-1.5YMT-TR
- Part No.:
- MIC5325-1.5YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5325-1.5YMT-TR.pdf
- Description:
- IC REG LINEAR 1.5V 400MA 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,549
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Product details
Overview
MIC5325-1.5YMT from Micrel is a fixed 1.5V ultra-low-dropout linear regulator delivering up to 400mA output current with 110mV dropout at full load, ±2% voltage accuracy over –40°C to +125°C, and 35µA typical ground current-designed for battery-powered GPS receivers and low-power handheld devices requiring stable low-voltage bias.
For engineers reviewing the MIC5325-1.5YMT datasheet, MIC5325-1.5YMT pinout, MIC5325-1.5YMT application, or MIC5325-1.5YMT equivalent, key selection factors include its dual-supply architecture (VIN + VBIAS), 1µF ceramic capacitor stability, zero-off-mode shutdown, thermal/current protection, and 2mm × 2mm Thin MLF® package compatibility with space-constrained portable designs.
Technical Context
The MIC5325-1.5YMT employs a dual-input architecture: VIN powers the pass element while VBIAS (2.5V–5.5V) supplies the control circuitry-enabling ultra-low dropout and minimizing ground current across load conditions. Its µCap design stabilizes with only 1µF ceramic output capacitance and integrates a quick-start bypass circuit for fast turn-on even with 10nF BYP capacitor.
Functional protection includes foldback current limiting (450–680mA), thermal shutdown, and CMOS-based active-high enable with 0.2V logic-low threshold. Ripple rejection reaches 65dB at 1kHz with 10nF BYP capacitor, and output noise is 30µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% over –40°C to +125°C-ensures precision biasing for RF front-ends and ADC references. |
| Dropout Voltage | 110mV typical at 400mA-enables operation from 1.61V input, critical for single-cell Li-ion or NiMH systems. |
| Ground Current | 35µA typical across 100µA–400mA load-minimizes quiescent power loss in always-on sensor nodes. |
| Input Voltage Range | VIN: 1.7V to VBIAS; VBIAS: 2.5V to 5.5V-decouples regulation path from bias rail, improving PSRR and efficiency. |
| Stability | Stable with ≥1µF ceramic output capacitor-eliminates need for tantalum or large electrolytics in compact layouts. |
| Enable Threshold | Logic-high enable ≥1.2V; logic-low disable ≤0.2V-compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | θJA = 90°C/W (2mm × 2mm Thin MLF®)-supports 400mA continuous output at ≤85°C ambient with minimal copper area. |
Pinout & Package
Package: 6-pin 2mm × 2mm Thin MLF® (exposed pad), Pb-free, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBIAS | Bias supply input | Powers internal reference and control circuitry independently of VIN; must be ≥2.5V and bypassed with 1µF ceramic to GND. |
| 2 - GND | Analog/digital ground | Common return for VIN, VOUT, VBIAS, and BYP; requires low-inductance connection to exposed thermal pad. |
| 3 - IN | Main power input | Supplies LDO pass transistor; minimum 1.7V; requires 1µF ceramic bypass to GND for high-frequency stability. |
| 4 - OUT | Regulated output | Delivers fixed 1.5V up to 400mA; connects directly to load with minimal trace length to reduce noise coupling. |
| 5 - BYP | Noise bypass terminal | Connects 10nF capacitor to GND to shunt reference noise; improves PSRR by 5dB and reduces output noise to 30µVRMS. |
| 6 - EN | Active-high enable | Drives output ON/OFF; must be pulled high via resistor or MCU GPIO; floating state causes indeterminate operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 110mV @ 400mA enables use with sub-1.6V input sources-critical for post-regulation after buck converters. |
| Dual-supply architecture | Separate VIN and VBIAS inputs isolate control logic from power path, reducing ground current sensitivity to input ripple. |
| Zero-off-mode shutdown | 0.01µA typical shutdown current eliminates battery drain in sleep states-verified down to 0.2V EN voltage. |
| Fast transient response | Sub-500µs turn-on time with 1µF COUT + 10nF BYP supports burst-mode wireless transceivers and wake-on-event systems. |
| Integrated protection | Thermal shutdown and foldback current limit prevent damage during short-circuit or overload-no external components required. |
Applications
| GPS Receiver Power Management | Low-Power Wearable Sensor Hub |
|---|---|
Use Scenario: Powers GPS baseband IC and RF frontend from single-cell lithium polymer battery with tight voltage margin. IC Role / Device Role / Timing Role: Post-regulator providing clean, low-noise 1.5V bias for analog front-end and crystal oscillator circuitry. Use Value: 110mV dropout extends usable battery range by >12% versus standard LDOs; 30µVRMS noise prevents carrier phase error in high-sensitivity GNSS tracking. | Use Scenario: Supplies 1.5V to MEMS accelerometer, BLE SoC I/O domain, and optical heart-rate sensor in fitness tracker. IC Role / Device Role / Timing Role: Primary system LDO enabling simultaneous low-quiescent operation of multiple sensors during motion detection. Use Value: 35µA typical ground current maintains 30-day shelf life; zero-off-mode cuts standby current to <10nA when BLE radio sleeps. |
| Portable Medical Pulse Oximeter | Industrial Handheld Data Logger |
Use Scenario: Powers red/infrared LED drivers and analog signal chain in battery-operated pulse oximeter with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise voltage source for precision current sinks and ADC reference buffer. Use Value: 65dB PSRR at 1kHz with BYP capacitor suppresses switching noise from adjacent DC-DC converter, ensuring SpO₂ measurement accuracy ±1%. | Use Scenario: Provides regulated 1.5V to microcontroller core, SD card interface, and real-time clock in ruggedized field data collector. IC Role / Device Role / Timing Role: High-reliability bias rail supporting –40°C to +125°C operating range and 10-year field deployment. Use Value: ±2% output accuracy over full temperature range eliminates calibration drift; thermal shutdown prevents failure during extended solar-heated operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-dropout LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B152MR-G | Single-supply (no VBIAS pin); 150mV dropout @ 300mA; 25µA IQ; SOT-25 package | Lacks dual-rail architecture and BYP pin-lower PSRR (55dB) and higher dropout limit system input voltage flexibility. | Select when board space allows SOT-25 and bias rail sharing simplifies layout; not suitable for ultra-low-VIN (<1.65V) or high-PSRR requirements. |
| Analog Devices ADP125ARHZ-1.5-R7 | Single-supply; 135mV dropout @ 500mA; 30µA IQ; 6-lead LFCSP package | No BYP pin or quick-start circuit-slower turn-on (1.2ms); no dedicated VBIAS rail for independent noise isolation. | Choose for higher output current headroom and ADI ecosystem support; avoid when 100µs turn-on or 30µVRMS noise are mandatory. |
Compared with XC6219B152MR-G and ADP125ARHZ-1.5-R7, the MIC5325-1.5YMT uniquely delivers lowest dropout (110mV), lowest noise (30µVRMS), and fastest turn-on (150µs) among 1.5V 400mA LDOs-enabled by its dual-supply architecture and integrated BYP path.
Availability
MIC5325-1.5YMT is available at Aetrix Electronics and suitable for GPS receivers, wearable health monitors, portable medical diagnostics, and industrial handheld data loggers requiring stable component supply with guaranteed long-term availability.
Supply support for MIC5325-1.5YMT 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
Micrel Inc. was a U.S.-based semiconductor company specializing in high-performance analog and power management ICs before its acquisition by Microchip Technology in 2015.
The MIC5325 family was designed as ultra-low-IQ, low-dropout regulators for battery-critical portable electronics-emphasizing dual-rail efficiency, minimal external components, and robust operation across automotive-grade temperature ranges.
FAQ
What is the minimum input voltage required for MIC5325-1.5YMT to regulate 1.5V output?
The MIC5325-1.5YMT requires a minimum input voltage (VIN) of 1.7V. With its 110mV typical dropout at 400mA, it can maintain regulation down to VIN = 1.61V under ideal conditions-but the absolute minimum specified VIN is 1.7V to ensure guaranteed performance across temperature and process variation. Always maintain VIN ≥ 1.7V per the datasheet's operating ratings.
Does MIC5325-1.5YMT require an external bypass capacitor on the BYP pin?
Yes, MIC5325-1.5YMT requires a capacitor on the BYP pin to achieve specified noise and PSRR performance. A 10nF ceramic capacitor to ground is recommended: it reduces output voltage noise to 30µVRMS (10Hz–100kHz) and improves PSRR by 5dB at 1kHz. Omitting the BYP capacitor degrades noise performance and ripple rejection, though regulation remains functional.
Can MIC5325-1.5YMT operate without a minimum load current?
Yes, MIC5325-1.5YMT does not require a minimum load current to maintain regulation. Unlike many LDOs, it remains stable and accurate from zero load up to 400mA-confirmed in the datasheet's "Minimum Load Current" section. This makes MIC5325-1.5YMT suitable for intermittent-load applications like sensor wake-up circuits where output may sit idle for extended periods.
What is the function of the VBIAS pin on MIC5325-1.5YMT, and what voltage range must it be supplied with?
The VBIAS pin on MIC5325-1.5YMT supplies power exclusively to the internal reference and control circuitry-decoupling it from the main VIN rail. It must be supplied within 2.5V to 5.5V, independent of VIN. This architecture enables ultra-low ground current and high PSRR. A 1µF ceramic capacitor from VBIAS to GND is mandatory for stable operation and noise immunity.
Is MIC5325-1.5YMT pin-compatible with other variants in the MIC5325 family?
Yes, all MIC5325 variants-including MIC5325-1.2YMT, MIC5325-1.5YMT, MIC5325-1.8YMT, and MIC5325-3.6YMT-are fully pin-compatible. They share identical 6-pin 2mm × 2mm Thin MLF® packaging, pinout, and electrical interface. Only the fixed output voltage differs; no PCB layout changes are needed when substituting between these part numbers.
MIC5325-1.5YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad, 6-TMLF®
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.25V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- -
- PSRR:
- 40dB ~ 65dB (1kHz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TMLF® (2x2)
MIC5325-1.5YMT-TR FAQ
1.How can I place an order for MIC5325-1.5YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5325-1.5YMT-TR 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 MIC5325-1.5YMT-TR reliable?
The price and inventory of MIC5325-1.5YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5325-1.5YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5325-1.5YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5325-1.5YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5325-1.5YMT-TR?
MIC5325-1.5YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5325-1.5YMT-TR 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 MIC5325-1.5YMT-TR?
For technical support, including MIC5325-1.5YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5325-1.5YMT-TR requirements.
6.How does Aetrix verify that MIC5325-1.5YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5325-1.5YMT-TR 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 MIC5325-1.5YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5325-1.5YMT-TR?
All MIC5325-1.5YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5325-1.5YMT-TR, 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 MIC5325-1.5YMT-TR part is unused and in its original packaging.
Return procedure for MIC5325-1.5YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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