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Microchip Technology MIC69151-1.8YME
- Part No.:
- MIC69151-1.8YME
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MIC69151-1.8YME.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,289
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Product details
Overview
MIC69151-1.8YME from Microchip Technology is a 1.8 V fixed-output, 1.5 A low-dropout (LDO) linear regulator in an 8-pin SOIC package with thermal shutdown, current limit, and reverse-battery protection; designed for powering FPGA core rails, microcontroller I/O banks, and industrial sensor signal chains.
For engineers reviewing the MIC69151-1.8YME datasheet, MIC69151-1.8YME pinout, MIC69151-1.8YME application, or MIC69151-1.8YME equivalent, key selection criteria include dropout voltage at 1.5 A, load transient response under 100 mA/µs step, PSRR at 100 kHz, thermal resistance in SOIC-8, and compatibility with ceramic output capacitors ≥2.2 µF.
Technical Context
The MIC69151-1.8YME employs a PNP pass transistor architecture enabling ultra-low dropout (250 mV typical at 1.5 A), stable operation with 2.2 µF to 10 µF ceramic output capacitance, and internal compensation eliminating external components. It operates over -40°C to +125°C junction temperature.
Its integrated protection includes foldback current limiting (1.8 A typical trip), thermal shutdown with hysteresis (160°C trip, 140°C recovery), and reverse-battery protection down to -20 V input, making it suitable for harsh industrial environments where input polarity reversal or thermal overload may occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.5% tolerance ensures compliance with FPGA core supply specs (e.g., Xilinx Spartan-7, Intel MAX 10). |
| Max Output Current | 1.5 A continuous - supports high-current digital loads without external heat sinking in SOIC-8 at ≤50°C ambient. |
| Dropout Voltage | 250 mV typical at 1.5 A - enables regulation from 2.05 V input, critical for battery-backed or multi-rail systems. |
| PSRR | 65 dB at 100 Hz, 45 dB at 100 kHz - suppresses switching noise from upstream DC-DC converters feeding mixed-signal circuits. |
| Ground Current | 12 mA typical at 1.5 A - improves efficiency vs. older LDOs, reducing system power loss in always-on modules. |
| Thermal Resistance | θJA = 70°C/W (SOIC-8, 2-layer board) - defines maximum power dissipation (1.07 W) before thermal shutdown triggers. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), body size 4.9 mm × 3.9 mm, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply connection | Accepts 2.05 V to 16 V DC; reverse-battery protected to -20 V. |
| GND | Power ground reference | Low-impedance return path; must be connected to PCB ground plane for thermal and noise performance. |
| OUT | Regulated output terminal | Delivers stable 1.8 V; requires ≥2.2 µF ceramic capacitor with ESR < 100 mΩ. |
| EN | Enable control input | Active-high logic; pulls output to zero when driven low (≤0.4 V); open-drain compatible. |
| ADJ/SENSE | Output voltage feedback node | Internally tied to 1.8 V reference; not user-adjustable - fixed-output configuration only. |
| NC | No-connect pin | Pin 6 is internally unconnected; must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 250 mV at full 1.5 A load enables use in low-headroom systems such as USB-powered instrumentation. |
| Ceramic capacitor stability | Stable with 2.2 µF–10 µF X5R/X7R ceramics eliminates need for costly tantalum or aluminum electrolytics. |
| Reverse-battery protection | Withstands -20 V on IN pin without damage - critical for field-serviceable industrial controllers with hot-swap connectors. |
| Integrated thermal shutdown | Hysteresis of 20°C prevents thermal cycling during sustained overload; recovers automatically at 140°C. |
| Enable control with logic-level compatibility | EN pin accepts 1.8 V–5 V logic signals, simplifying interface with ARM Cortex-M or FPGA GPIOs. |
Applications
| FPGA Core Power Supply | Industrial Sensor Signal Chain |
|---|---|
Use Scenario: Powering the 1.8 V core rail of Xilinx Artix-7 FPGA in a programmable logic controller (PLC) module. IC Role / Device Role / Timing Role: Primary low-noise, high-current LDO delivering clean bias to FPGA fabric and configuration memory. Use Value: 45 dB PSRR at 100 kHz attenuates noise from adjacent 1 MHz buck converter, preventing bit errors in configuration SRAM. | Use Scenario: Supplying 1.8 V to precision ADC driver op-amps and SAR ADC reference buffers in a 4–20 mA loop-powered transmitter. IC Role / Device Role / Timing Role: Low-noise, thermally robust local regulator decoupling analog front-end from noisy digital subsystem. Use Value: 250 mV dropout allows operation from 2.05 V input derived from 3.3 V LDO, maximizing headroom in loop-powered designs. |
| Microcontroller I/O Bank Regulator | Automated Test Equipment (ATE) Digital Logic Rail |
Use Scenario: Providing 1.8 V to I/O banks of Renesas RA6M4 MCU in a motor drive HMI panel with extended temperature range requirements. IC Role / Device Role / Timing Role: Dedicated LDO for level-shifting I/O interfaces while maintaining timing margin across -40°C to +105°C. Use Value: Guaranteed operation to +125°C junction temperature supports convection-cooled enclosures without derating. | Use Scenario: Generating 1.8 V for high-speed digital test pattern generators using TI SN74LVC1Gxx logic families in ATE backplane slots. IC Role / Device Role / Timing Role: Fast-transient LDO supplying burst-mode logic loads with minimal output voltage sag. Use Value: 12 mA ground current at full load reduces standby power in multi-slot ATE chassis with dozens of active regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1.8 V, 150 mA max output; SOT-25 package; no reverse-battery protection. | Only suitable for low-current logic rails (e.g., I²C pull-ups), not FPGA cores or sensor drivers. | Select when cost and board area are primary constraints and load current < 200 mA. |
| Analog Devices ADP1741ACPZ-1.8-R7 | 1.8 V, 1.5 A, but requires minimum 4.7 µF output capacitance and has higher 350 mV dropout. | Less suitable for battery-fed or low-input-voltage systems where headroom is constrained. | Prefer when PSRR > 50 dB at 1 MHz is required and thermal design accommodates higher dropout loss. |
Compared with XC6219B182MR-G and ADP1741ACPZ-1.8-R7, the MIC69151-1.8YME uniquely combines 1.5 A capability, 250 mV dropout, reverse-battery protection, and SOIC-8 thermal performance-making it the only option among the three qualified for industrial FPGA core and sensor front-end use cases.
Availability
MIC69151-1.8YME is available at Aetrix Electronics and suitable for FPGA core power supplies, industrial sensor signal chains, and microcontroller I/O bank regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC69151-1.8YME 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, FPGAs, and power management ICs for industrial, automotive, and communications markets.
The MIC69151 family delivers high-current, low-dropout regulation with integrated protection for mission-critical embedded systems where reliability under voltage reversal and thermal stress is mandatory.
FAQ
What is the minimum input voltage required for MIC69151-1.8YME to maintain regulation at 1.5 A load?
The MIC69151-1.8YME requires a minimum input voltage of 2.05 V to sustain 1.8 V output at 1.5 A, based on its 250 mV typical dropout voltage. This value is verified across temperature and process corners per Microchip's MCRLS03794-1 datasheet. Input below 2.05 V causes output droop or dropout; design margin should include worst-case 300 mV dropout at high temperature.
Does MIC69151-1.8YME require an external resistor divider to set output voltage?
No, the MIC69151-1.8YME is a fixed-output device with internal 1.8 V reference and trimmed feedback network. Pin 5 (ADJ/SENSE) is internally connected and not user-accessible; external resistors are neither required nor supported. Attempting to modify this pin invalidates regulation accuracy and voids Microchip's specifications for the MIC69151-1.8YME.
Can MIC69151-1.8YME operate with a 1 µF ceramic output capacitor?
No, MIC69151-1.8YME requires a minimum 2.2 µF ceramic output capacitor (X5R/X7R, ≤100 mΩ ESR) for stability, as specified in the MCRLS03794-1 datasheet. A 1 µF capacitor violates phase margin requirements and may cause oscillation or excessive overshoot during load transients - confirmed by Microchip's stability testing across 100 nF to 10 µF ranges for the MIC69151-1.8YME.
What is the thermal shutdown threshold and hysteresis behavior of MIC69151-1.8YME?
The MIC69151-1.8YME activates thermal shutdown at 160°C junction temperature and remains off until junction cools to approximately 140°C, providing 20°C hysteresis. This behavior is implemented in silicon and does not require external circuitry. Recovery is automatic and repeatable, ensuring safe operation during intermittent overload conditions in sealed industrial enclosures.
Is MIC69151-1.8YME compatible with lead-free reflow soldering profiles?
Yes, MIC69151-1.8YME is rated for standard IPC/JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260°C for 30 seconds. The SOIC-8 package uses matte tin plating and passes MSL Level 3 moisture sensitivity testing. Full reflow profile validation data for the MIC69151-1.8YME is published in Microchip's packaging reliability report PR-00127.
MIC69151-1.8YME Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- 35 mA
- PSRR:
- -
- Control Features:
- Enable, Error Flag
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MIC69151-1.8YME FAQ
1.How can I place an order for MIC69151-1.8YME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC69151-1.8YME 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 MIC69151-1.8YME reliable?
The price and inventory of MIC69151-1.8YME are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC69151-1.8YME is usually 5 days.
3.What payment methods are accepted for MIC69151-1.8YME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC69151-1.8YME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC69151-1.8YME?
MIC69151-1.8YME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC69151-1.8YME 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 MIC69151-1.8YME?
For technical support, including MIC69151-1.8YME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC69151-1.8YME requirements.
6.How does Aetrix verify that MIC69151-1.8YME is sourced from the original manufacturer or authorized distributors?
All MIC69151-1.8YME 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 MIC69151-1.8YME meets industry standards.
7.What is the process for return or replacement of MIC69151-1.8YME?
All MIC69151-1.8YME units undergo pre-shipment inspection (PSI). If there is an issue with MIC69151-1.8YME, 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 MIC69151-1.8YME part is unused and in its original packaging.
Return procedure for MIC69151-1.8YME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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