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Microchip Technology MIC5524-1.2YMT-TZ
- Part No.:
- MIC5524-1.2YMT-TZ
- Manufacturer:
- Microchip Technology
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
MIC5524-1.2YMT-TZ.pdf
- Description:
- IC REG LINEAR 1.2V 500MA 4TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,397
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Product details
Overview
MIC5524-1.2YMT-TZ from Micrel is a fixed-output 1.2V, 500mA low-dropout linear regulator in a 1mm × 1mm Thin DFN package, featuring ±1% output accuracy, 260mV dropout at full load, 38µA quiescent current, and auto-discharge functionality-designed for space-constrained, battery-powered portable medical devices and handheld electronics.
For engineers reviewing the MIC5524-1.2YMT-TZ datasheet, MIC5524-1.2YMT-TZ pinout, MIC5524-1.2YMT-TZ application, or MIC5524-1.2YMT-TZ equivalent, key selection considerations include its µCap stability with 2.2µF ceramic output capacitors, TTL-compatible enable input with internal 4MΩ pulldown, thermal shutdown protection, and operation across –40°C to +125°C junction temperature.
Technical Context
The MIC5524-1.2YMT-TZ employs a CMOS-based LDO architecture with integrated pass transistor, precision bandgap reference, and error amplifier optimized for fast transient response and high PSRR (80dB @ 100Hz). Its internal auto-discharge NFET (25Ω) activates upon EN deassertion to rapidly discharge external output capacitance.
It operates within 2.5V–5.5V input range and delivers regulated 1.2V output with line regulation of 0.3%/V and load regulation of 10mV from 100µA to 500mA. Thermal shutdown and current-limit protection ensure robust fault handling without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% initial accuracy-ensures stable core voltage for low-power microcontrollers and sensors. |
| Max Output Current | 500mA guaranteed-supports moderate-power RF modules and display drivers without derating at 85°C ambient. |
| Dropout Voltage | 260mV @ 500mA-enables operation from 1.46V input, critical for single-cell Li-ion or Li-poly systems near end-of-discharge. |
| Quiescent Current | 38µA typical-minimizes standby power loss in always-on wearable or IoT edge nodes. |
| PSRR | 80dB @ 100Hz-suppresses switching noise from adjacent DC/DC converters in mixed-signal PCBs. |
| Enable Threshold | Logic-high ≥1.2V, logic-low ≤0.2V-compatible with 1.8V/3.3V GPIO without level-shifting. |
| Stability | Guaranteed with ≥2.2µF X5R/X7R ceramic output capacitor-reduces BOM count and board area vs. electrolytic solutions. |
Pinout & Package
Package: 4-pin 1mm × 1mm Thin DFN (TDFN-4, MT), RoHS-compliant, halogen-free mold compound, NiPdAu lead finish, exposed ePad (EP) for thermal enhancement-requires EP soldered to GND plane for optimal thermal performance (θJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Regulated output node | Delivers 1.2V to load; internally connects to 25Ω discharge FET when EN = low-prevents residual voltage hold-up in power sequencing. |
| 2 - GND | Power and signal reference | Common return path for VIN, VOUT, and EN; must be low-impedance connection to minimize ground bounce and PSRR degradation. |
| 3 - EN | Active-high enable control | EN ≥1.2V enables regulation; EN ≤0.2V disables output; internal 4MΩ pulldown ensures safe default-OFF state during processor boot or floating control lines. |
| 4 - VIN | Input supply connection | Accepts 2.5V–5.5V unregulated input; requires 2.2µF ceramic decoupling capacitor placed <1mm from pin to suppress high-frequency noise. |
| EP - ePad | Thermal heatsink | Exposed copper pad beneath die-must be soldered to solid GND plane for thermal conduction; omission increases θJA by >100°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| µCap architecture | Stable with only 2.2µF ceramic output capacitor-eliminates need for large tantalum or aluminum electrolytics, reducing footprint and cost in portable designs. |
| Auto-discharge circuit | 25Ω internal NFET activated on disable-discharges 100µF output cap in <2.5ms, enabling clean power-down sequencing in multi-rail systems. |
| TTL-compatible EN pin | 4MΩ internal pulldown-removes need for external pull-down resistor, simplifying layout and reducing component count in FPGA or MCU interface circuits. |
| High-accuracy output | ±1% initial tolerance over temperature-meets tight voltage margin requirements for 1.2V core rails in ARM Cortex-M4/M7 SoCs and ASICs. |
| Fault protection | Integrated thermal shutdown and current limit (525–800mA)-prevents damage during short-circuit or overload without external sensing circuitry. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Powering ultra-low-power ECG front-end amplifiers and ADCs in disposable patch monitors. IC Role / Device Role / Timing Role: Primary 1.2V supply for analog signal chain and digital controller-provides clean, low-noise bias under dynamic load conditions. Use Value: 80dB PSRR and 80µVRMS output noise prevent interference with sub-mV biopotential signals; 38µA quiescent current extends battery life beyond 7 days on coin cell. |
Use Scenario: Regulating voltage for Bluetooth LE SoC and optical heart-rate sensor in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Always-on LDO supplying real-time clock and sensor interface logic during sleep mode. Use Value: Auto-discharge ensures rapid rail collapse on wake-up reset; ±1% accuracy maintains BLE radio sensitivity across temperature drift. |
| Industrial Handheld Terminals | Low-Power GPS Modules |
Use Scenario: Providing stable 1.2V core voltage to ARM-based application processors in ruggedized barcode scanners. IC Role / Device Role / Timing Role: POL (point-of-load) regulator located directly at processor VDDCORE pin-minimizes IR drop and noise coupling. Use Value: 260mV dropout allows operation down to 1.46V input, supporting extended runtime from partially discharged 3.7V Li-ion packs in field use. |
Use Scenario: Supplying 1.2V to GPS baseband ICs and RF front-end in compact asset trackers. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO isolating sensitive GNSS receiver from noisy PMIC outputs. Use Value: Fast turn-on time (50–125µs) enables precise power-gating synchronization with GPS acquisition bursts; 1mm × 1mm footprint saves critical area on miniaturized PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B122MR-G | 1.2V fixed, 300mA output, 250mV dropout @ 300mA, 25µA IQ, SOT-25 package (2.9 × 2.8mm) | Lower current rating and larger footprint-suitable only for sub-300mA loads where board space permits SOT-25 placement. | Select when lower cost and legacy SMT compatibility outweigh need for 500mA capability and 1mm² footprint. |
| Richtek RT9013-12GB | 1.2V fixed, 500mA output, 300mV dropout @ 500mA, 60µA IQ, SOT-23-5 package (2.9 × 1.6mm) | Higher dropout and quiescent current; no auto-discharge; requires external pull-down on EN. | Choose only if existing SOT-23-5 layout exists and auto-discharge is not required for system power sequencing. |
Compared with XC6210B122MR-G and RT9013-12GB, the MIC5524-1.2YMT-TZ uniquely combines 500mA drive, 260mV dropout, 38µA IQ, and integrated auto-discharge in a 1mm × 1mm footprint-making it the only option meeting simultaneous size, efficiency, and sequencing requirements for next-gen wearables and portable diagnostics.
Availability
MIC5524-1.2YMT-TZ is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5524-1.2YMT-TZ 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. It pioneered µCap LDO architectures for ultra-compact portable electronics.
The MIC5524 product line was designed specifically for space- and power-constrained battery-operated devices-emphasizing minimal footprint, ultra-low IQ, and robust power sequencing features like auto-discharge and internal enable pulldown.
FAQ
What is the maximum input voltage rating for the MIC5524-1.2YMT-TZ?
The MIC5524-1.2YMT-TZ has an absolute maximum input voltage (VIN) rating of 6V, but its recommended operating range is 2.5V to 5.5V. Exceeding 5.5V may trigger internal protection or cause reliability issues. The device is commonly used with 3.3V or 5V input rails in portable systems, and its 260mV dropout enables efficient operation even at low headroom.
Does the MIC5524-1.2YMT-TZ require an external pull-down resistor on the EN pin?
No, the MIC5524-1.2YMT-TZ includes an internal 4MΩ pull-down resistor on the EN pin, ensuring the regulator remains disabled when the control signal is left floating-such as during microcontroller reset or boot-up. This eliminates the need for an external resistor and simplifies PCB layout while guaranteeing safe default behavior in MIC5524-1.2YMT-TZ-based designs.
Can the MIC5524-1.2YMT-TZ operate without any load connected to VOUT?
Yes, the MIC5524-1.2YMT-TZ remains stable and in regulation with zero load-unlike many older LDOs that require minimum load current. This no-load stability is essential for applications like CMOS RAM keep-alive circuits or always-on sensor biasing, where the MIC5524-1.2YMT-TZ delivers precise 1.2V without oscillation or dropout.
What output capacitor value and type are required for stability with the MIC5524-1.2YMT-TZ?
The MIC5524-1.2YMT-TZ requires a minimum 2.2µF ceramic output capacitor with X5R or X7R dielectric-placed as close as possible to the VOUT and GND pins. Y5V or Z5U capacitors are not recommended due to excessive capacitance loss over temperature. Larger values (e.g., 4.7µF) are acceptable but provide no significant performance improvement beyond the 2.2µF baseline validated in MIC5524-1.2YMT-TZ characterization.
How does the auto-discharge feature function in the MIC5524-1.2YMT-TZ?
When the EN pin is driven low, the MIC5524-1.2YMT-TZ activates an internal 25Ω NFET between VOUT and GND, actively discharging external output capacitance. This ensures rapid rail collapse-critical for clean power-down sequencing in multi-voltage systems. The discharge time depends on capacitance value; for example, a 100µF cap discharges to <100mV in under 2.5ms, as verified in MIC5524-1.2YMT-TZ electrical testing.
MIC5524-1.2YMT-TZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 4-UDFN Exposed Pad
- 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 65dB (100Hz ~ 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:
- 4-TDFN (1x1)
MIC5524-1.2YMT-TZ FAQ
1.How can I place an order for MIC5524-1.2YMT-TZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5524-1.2YMT-TZ 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 MIC5524-1.2YMT-TZ reliable?
The price and inventory of MIC5524-1.2YMT-TZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5524-1.2YMT-TZ is usually 5 days.
3.What payment methods are accepted for MIC5524-1.2YMT-TZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5524-1.2YMT-TZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5524-1.2YMT-TZ?
MIC5524-1.2YMT-TZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5524-1.2YMT-TZ 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 MIC5524-1.2YMT-TZ?
For technical support, including MIC5524-1.2YMT-TZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5524-1.2YMT-TZ requirements.
6.How does Aetrix verify that MIC5524-1.2YMT-TZ is sourced from the original manufacturer or authorized distributors?
All MIC5524-1.2YMT-TZ 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 MIC5524-1.2YMT-TZ meets industry standards.
7.What is the process for return or replacement of MIC5524-1.2YMT-TZ?
All MIC5524-1.2YMT-TZ units undergo pre-shipment inspection (PSI). If there is an issue with MIC5524-1.2YMT-TZ, 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 MIC5524-1.2YMT-TZ part is unused and in its original packaging.
Return procedure for MIC5524-1.2YMT-TZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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