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Microchip Technology MIC5309-1.5YMT-TR
- Part No.:
- MIC5309-1.5YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5309-1.5YMT-TR.pdf
- Description:
- IC REG LINEAR 1.5V 300MA 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,751
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Product details
Overview
MIC5309-1.5YMT-TR from Micrel is a fixed-output 1.5V, 300mA ultra-low dropout (ULDO™) linear regulator with 100mV typical dropout at full load, 23µA ground current under 300mA, and 90dB PSRR at 1kHz - designed for low-voltage battery-powered systems such as GPS receivers and mobile phones where input supply may dip to 1.7V.
For engineers reviewing the MIC5309-1.5YMT-TR datasheet, MIC5309-1.5YMT-TR pinout, MIC5309-1.5YMT-TR application, or MIC5309-1.5YMT-TR equivalent, key selection criteria include its dual-supply architecture (VIN + BIAS), ultra-low IQ operation, 1.6mm × 1.6mm Thin MLF® package, and guaranteed 300mA output across –40°C to +125°C.
Technical Context
The MIC5309-1.5YMT-TR employs a dual-rail architecture: VIN supplies power to the pass element while BIAS (2.5V–5.5V) powers the control circuitry, enabling ultra-low dropout (100mV @ 300mA) even when VIN is as low as 1.7V. This separation reduces thermal stress and improves PSRR performance.
It integrates CMOS-based enable logic (active-high EN), internal reference bypass via BYP/ADJ pin, thermal shutdown, and foldback current limiting. Stability is ensured with only 1µF ceramic output capacitance, and noise is suppressed using a dedicated 10nF bypass capacitor on the BYP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% - eliminates external feedback resistors and ensures precision for core logic rails. |
| Max Output Current | 300mA over full temperature range - supports moderate-power digital loads without derating. |
| Dropout Voltage | 100mV typical @ 300mA - enables regulation from 1.6V input, critical for Li-ion battery discharge tail-end. |
| Ground Current | 23µA typical @ 300mA - minimizes quiescent loss in always-on subsystems like real-time clocks. |
| PSRR | 90dB @ 1kHz with 10nF BYP capacitor - suppresses switching noise from upstream DC-DC converters. |
| Input Voltage Range | 1.7V to VBIAS - allows direct connection to partially discharged batteries or low-VIN intermediate rails. |
| Bias Supply Range | 2.5V to 5.5V - decouples control circuitry from noisy or sagging main input, improving transient immunity. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin MLF® (MT), RoHS-compliant, NiPdAu lead finish, halogen-free mold compound, exposed EPAD thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BIAS | Bias supply input | Powers internal control circuitry independently of VIN; requires 2.5V–5.5V and benefits from 1µF ceramic bypass to GND. |
| 2 - GND | Power ground | Common return for VIN, VOUT, BIAS, and EN; connects internally to EPAD for thermal conduction. |
| 3 - VIN | Main LDO input | Supplies pass transistor; accepts 1.7V–VBIAS; minimum 1µF ceramic input capacitor required. |
| 4 - BYP/ADJ | Bypass or feedback node | When used as fixed-output (MIC5309-1.5YMT-TR), connect 10nF to GND to reduce output noise and improve PSRR. |
| 5 - EN | Enable input | Active-high CMOS input; drives VOUT when ≥1.2V; draws ≤1µA; must not be left floating. |
| 6 - VOUT | Regulated output | Delivers stable 1.5V; requires ≥1µF ceramic output capacitor; no minimum load required. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply architecture (VIN + BIAS) | Enables 100mV dropout at 300mA while isolating sensitive control circuitry from noisy or low-VIN rails. |
| Ultra-low ground current (23µA @ 300mA) | Extends battery life in portable devices by minimizing quiescent loss during active operation. |
| Zero-off-mode shutdown (≤2µA) | Reduces system standby current to near-zero when EN is pulled low - ideal for wake-on-event architectures. |
| Stable with 1µF ceramic output capacitor | Eliminates need for large or specialized capacitors, reducing BOM cost and PCB footprint. |
| Integrated thermal shutdown & current limit | Protects against sustained overload or ambient overheating without external protection circuitry. |
Applications
| GPS Receivers | Mobile Phones |
|---|---|
|
Use Scenario: Powering RF front-end and baseband ICs during cold-start acquisition under weak battery conditions (e.g., 2.8V Li-ion). IC Role / Device Role / Timing Role: Primary low-noise 1.5V supply for GNSS baseband processor and LNA bias. Use Value: 90dB PSRR at 1kHz rejects switching noise from PMIC DC-DC converters; 100mV dropout extends usable battery range by ~15 minutes. |
Use Scenario: Supplying application processor I/O or memory interface rails during burst-mode data transmission. IC Role / Device Role / Timing Role: Fast-transient 1.5V LDO for high-speed digital interfaces requiring tight voltage tolerance. Use Value: 23µA ground current and zero-off-mode enable ultra-low standby power; 150µs turn-on time supports rapid wake-up from deep sleep. |
| PDAs | Portable Medical Sensors |
|
Use Scenario: Regulating 1.5V for touch controller and display driver ICs in compact handheld form factors. IC Role / Device Role / Timing Role: Compact-area, low-thermal-footprint voltage source for mixed-signal peripherals. Use Value: 1.6mm × 1.6mm Thin MLF® package saves >40% board area vs. TSOT-23; EPAD enhances thermal dissipation in sealed enclosures. |
Use Scenario: Powering low-power analog front-end (AFE) and Bluetooth LE radio in wearable ECG monitors. IC Role / Device Role / Timing Role: Ultra-low-noise, low-IQ supply for precision analog signal chain and wireless transceiver. Use Value: 28µVRMS output noise and 10nF BYP pin support sub-µV-level signal integrity; –40°C to +125°C rating ensures clinical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B152MR-G | Single-supply (no BIAS rail); 150mV dropout @ 300mA; 25µA IQ; same 1.5V fixed output. | Lacks dual-rail architecture - less effective at rejecting VIN ripple; higher dropout limits use below 1.65V input. | Select when board space is constrained and BIAS rail unavailable; verify PSRR meets system noise floor. |
| Analog Devices ADP160AUJZ-1.5-R7 | Single-supply; 195mV dropout @ 150mA; 550nA IQ; 1.5V fixed; 5-pin TSOT-23. | Optimized for ultra-low IQ, not high-current delivery - rated only to 150mA; lower PSRR (70dB @ 1kHz). | Select for micropower sensor nodes where load <150mA and dropout >200mV is acceptable. |
Compared with MIC5309-1.5YMT-TR, the XC6219B152MR-G offers simpler supply routing but sacrifices dropout and PSRR; the ADP160AUJZ-1.5-R7 delivers nanoscale IQ but cannot sustain 300mA, making MIC5309-1.5YMT-TR the only choice for high-current, low-dropout, low-noise portable power rails.
Availability
MIC5309-1.5YMT-TR is available at Aetrix Electronics and suitable for GPS receivers, mobile phones, and portable medical sensors requiring stable component supply with guaranteed long-term availability and automotive-grade temperature support.
Supply support for MIC5309-1.5YMT-TR 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 power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015; known for high-performance analog and mixed-signal solutions.
The MIC5309 family was designed specifically for ultra-low-voltage, high-PSRR portable power applications - targeting battery-operated systems needing fast transient response, minimal quiescent current, and robust thermal performance in miniature packages.
FAQ
What is the maximum input voltage for MIC5309-1.5YMT-TR?
The MIC5309-1.5YMT-TR does not specify an absolute maximum VIN independent of BIAS. Per Absolute Maximum Ratings, VIN must not exceed VBIAS, and VBIAS is rated up to +6V. With VBIAS = 5.5V (operating max), VIN may be up to 5.5V. However, functional operation requires VIN ≥ 1.7V and VIN ≥ VOUT + dropout (i.e., ≥1.6V typical). The MIC5309-1.5YMT-TR is optimized for low-VIN use cases, not high-voltage inputs.
Can MIC5309-1.5YMT-TR operate without a bypass capacitor on the BYP pin?
Yes, the MIC5309-1.5YMT-TR functions without a BYP capacitor, but PSRR degrades significantly - dropping from 90dB to 70dB at 1kHz per Electrical Characteristics table. The 10nF BYP capacitor is recommended for noise-sensitive applications like RF receivers or precision ADCs. Omitting it increases output voltage noise from 28µVRMS to >50µVRMS, as shown in Typical Characteristics plots.
Is MIC5309-1.5YMT-TR pin-compatible with other MIC5309 variants?
Yes, all MIC5309-1.5YMT-TR, MIC5309-1.2YMT, and MIC5309-1.8YMT share identical 6-pin Thin MLF® (MT) package pinout and footprint. The only difference is output voltage - set internally during fabrication - so PCB layout and soldering process are fully interchangeable across fixed-output YMT variants.
Does MIC5309-1.5YMT-TR require a minimum load current?
No, the MIC5309-1.5YMT-TR does not require a minimum load current to maintain regulation - a key differentiator from many legacy LDOs. It maintains 1.5V output accuracy across the full 0–300mA load range, including no-load conditions, as confirmed in Load Regulation (0.4–2%) and Output Voltage vs. Output Current plots in the datasheet.
How does the BIAS supply affect MIC5309-1.5YMT-TR's thermal performance?
The BIAS supply powers only the control circuitry, drawing <100µA, so its contribution to total power dissipation is negligible (<1%). Thermal performance is dominated by (VIN – VOUT) × IOUT on the VIN rail. For example, at VIN = 1.8V, VOUT = 1.5V, and IOUT = 300mA, PD ≈ 90mW - well within the 1.6mm × 1.6mm MLF® package's 90°C/W θJA limit at TA ≤ 116°C. BIAS voltage stability has no direct thermal impact.
MIC5309-1.5YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFDFN 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):
- 0.2V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 90dB ~ 70dB (1kHz)
- 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® (1.6x1.6)
MIC5309-1.5YMT-TR FAQ
1.How can I place an order for MIC5309-1.5YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5309-1.5YMT-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 MIC5309-1.5YMT-TR reliable?
The price and inventory of MIC5309-1.5YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5309-1.5YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5309-1.5YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5309-1.5YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5309-1.5YMT-TR?
MIC5309-1.5YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5309-1.5YMT-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 MIC5309-1.5YMT-TR?
For technical support, including MIC5309-1.5YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5309-1.5YMT-TR requirements.
6.How does Aetrix verify that MIC5309-1.5YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5309-1.5YMT-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 MIC5309-1.5YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5309-1.5YMT-TR?
All MIC5309-1.5YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5309-1.5YMT-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 MIC5309-1.5YMT-TR part is unused and in its original packaging.
Return procedure for MIC5309-1.5YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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