My Inquiry
My Account
Microchip Technology MIC5503-1.8YMT-TZ
- Part No.:
- MIC5503-1.8YMT-TZ
- Manufacturer:
- Microchip Technology
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
MIC5503-1.8YMT-TZ.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 4TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,372
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5503-1.8YMT-TZ from Microchip Technology is a 300 mA, 1.8 V fixed-output low-dropout (LDO) regulator in a 4-lead 1.0 mm × 1.0 mm thin DFN package, featuring ±2% output accuracy, 160 mV dropout at full load, and internal enable pull-down for reliable disable during processor boot-up. It powers core logic rails in space-constrained portable electronics requiring stable low-voltage bias under variable load and input conditions.
For engineers reviewing the MIC5503-1.8YMT-TZ datasheet, MIC5503-1.8YMT-TZ pinout, MIC5503-1.8YMT-TZ application, or MIC5503-1.8YMT-TZ equivalent, this page delivers verified electrical specs, thermal behavior, EN pin logic validation, ceramic capacitor stability requirements, and real-world use context for battery-powered embedded systems.
Technical Context
The MIC5503-1.8YMT-TZ implements a CMOS-based LDO architecture with active-high enable control and an integrated 4 MΩ pull-down resistor on the EN pin-ensuring default-off operation when control signals float. Its regulation loop maintains 1.8 V output across 2.5–5.5 V input while delivering up to 300 mA with <38 μA quiescent current.
Designed for no-load stability and low-noise operation (175 μVRMS, 10 Hz–100 kHz), it supports 1 μF ceramic input/output capacitors and includes thermal shutdown and current-limit protection. Junction temperature range is –40°C to +125°C, with θJA = 250°C/W in the DFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% (±3% over –40°C to +125°C); enables precise core voltage for 1.8 V logic ICs without external feedback. |
| Max Output Current | 300 mA guaranteed; sufficient for powering microcontrollers, sensors, and RF transceivers in compact portable designs. |
| Dropout Voltage | 160 mV @ 300 mA; allows operation from 2.5 V input down to 1.96 V output, extending battery life in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 38 μA typical @ no load; minimizes standby power loss in always-on subsystems like RTC or wake-on-event circuits. |
| Enable Input Logic | Active-high EN with internal 4 MΩ pull-down; eliminates need for external pull-down resistor and prevents false turn-on during MCU reset. |
| Capacitor Support | Stable with ≥1 μF X5R/X7R ceramic capacitors; avoids ESR-related oscillation and simplifies layout in high-density PCBs. |
| Thermal Protection | Thermal shutdown + current limit; protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
Package: 4-Lead 1.0 mm × 1.0 mm Thin DFN (MT), exposed thermal pad (ePAD) to be connected to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 4) | Input supply connection | Accepts 2.5–5.5 V DC; requires 1 μF ceramic decoupling capacitor placed adjacent to pin for stability. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 4 MΩ pull-down ensures OFF state when unconnected-critical for safe boot sequencing. |
| VOUT (Pin 1) | Regulated output | Delivers fixed 1.8 V; stable with ≥1 μF ceramic output capacitor; no auto-discharge circuit (unlike MIC5502/4). |
| GND (Pin 2) | Ground reference | Common return path for input, output, and internal circuitry; must be tied to ePAD for thermal and noise integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Internal EN pull-down | 4 MΩ resistor ensures defined OFF state during MCU initialization-eliminates risk of floating control line causing erratic power-up. |
| No-load stability | Maintains regulation with zero output current; essential for maintaining backup rail integrity in memory retention or watchdog circuits. |
| Low-noise output | 175 μVRMS (10 Hz–100 kHz); reduces supply-induced jitter in ADC references and clock buffers. |
| Ultra-small footprint | 1.0 mm × 1.0 mm DFN package saves >60% board area vs. SOT23-5; enables placement directly under BGA processors. |
| Wide temperature range | –40°C to +125°C operating junction temperature; qualified for automotive cabin and industrial edge computing environments. |
Applications
| Wearable Sensor Node | Industrial IoT Edge Controller |
|---|---|
|
Use Scenario: Compact wearable device with BLE SoC, MEMS accelerometer, and flash memory operating from a single 3.7 V Li-poly cell. IC Role / Device Role / Timing Role: Primary 1.8 V core rail regulator for digital logic and sensor interface circuitry. Use Value: Enables >12-hour runtime via 38 μA quiescent current and 160 mV dropout, while fitting within 2.5 mm² PCB area budget. |
Use Scenario: DIN-rail mounted PLC module with ARM Cortex-M7 MCU, isolated RS-485 transceiver, and EEPROM. IC Role / Device Role / Timing Role: Local 1.8 V supply for MCU I/O banks and peripheral interfaces. Use Value: Delivers 300 mA with ±2% accuracy across –40°C to +85°C ambient, ensuring deterministic timing in deterministic Ethernet stacks. |
| Medical Pulse Oximeter | Smart Home Hub Power Management |
|
Use Scenario: Battery-powered handheld oximeter with optical sensor array, analog front-end, and OLED display driver. IC Role / Device Role / Timing Role: Clean 1.8 V bias for precision analog signal chain and low-power display controller. Use Value: 175 μVRMS noise floor prevents interference with sub-mV photodiode signals; stable with 1 μF ceramics simplifies BOM. |
Use Scenario: Wi-Fi/Zigbee hub with dual-band radio, voice DSP, and USB host port powered from 5 V adapter. IC Role / Device Role / Timing Role: Secondary 1.8 V rail for RF transceiver baseband and memory I/O. Use Value: Internal EN pull-down prevents spurious turn-on during hot-plug events; 250°C/W θJA supports convection-only cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5504-1.8YMT-TZ | Includes both EN pull-down and auto-discharge (25 Ω NFET); higher ground current (42 μA @ 300 mA) vs. MIC5503's 38 μA. | Required where rapid output discharge is needed after shutdown (e.g., to meet fast power-cycle specs). | Select MIC5504-1.8YMT-TZ only if auto-discharge functionality is mandatory; otherwise MIC5503-1.8YMT-TZ offers lower quiescent current. |
| TPS7A0518PDBVR | 200 mA max output, 25 μA IQ, 170 mV dropout @ 200 mA; 1.0 mm × 1.0 mm X2SON package; no internal EN pull-down. | Suitable for lower-current applications where external pull-down can be added; lacks guaranteed 300 mA capability. | Choose TPS7A0518PDBVR for ultra-low-IQ designs below 200 mA; MIC5503-1.8YMT-TZ remains preferred for full 300 mA + pull-down integration. |
Compared with MIC5504-1.8YMT-TZ, MIC5503-1.8YMT-TZ trades auto-discharge for lower ground current and simpler enable behavior; versus TPS7A0518PDBVR, it provides higher output current headroom and built-in EN robustness-making it optimal for 300 mA, floating-control, battery-critical systems.
Availability
MIC5503-1.8YMT-TZ is available at Aetrix Electronics and suitable for wearable electronics, medical diagnostics equipment, and industrial edge controllers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5503-1.8YMT-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
Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software tools.
The MIC5503 is part of Microchip's ultra-compact LDO family designed specifically for space- and power-constrained portable electronics, emphasizing no-load stability, low dropout, and integrated enable robustness for seamless integration into modern embedded power trees.
FAQ
What is the maximum input voltage rating for the MIC5503-1.8YMT-TZ?
The MIC5503-1.8YMT-TZ has an absolute maximum input voltage (VIN) rating of +6 V, but its specified operating input range is +2.5 V to +5.5 V. Exceeding 5.5 V may cause permanent damage or violate functional specifications-even briefly-so design margins should keep VIN ≤ 5.5 V under all conditions including ripple and transients.
Does the MIC5503-1.8YMT-TZ include an auto-discharge function on the VOUT pin?
No, the MIC5503-1.8YMT-TZ does not include auto-discharge. That feature is exclusive to MIC5502 and MIC5504 variants. The MIC5503-1.8YMT-TZ disables cleanly but leaves VOUT floating upon EN deactivation-external discharge circuitry is required if rapid voltage decay is needed.
Can the MIC5503-1.8YMT-TZ operate stably with no load connected to VOUT?
Yes, the MIC5503-1.8YMT-TZ remains stable and in regulation with zero output current-a key differentiator from many legacy LDOs. This makes it suitable for applications such as CMOS RAM keep-alive rails, real-time clocks, or always-on sensor bias where load current may drop to near-zero between activity bursts.
What is the purpose of the exposed thermal pad (ePAD) on the MIC5503-1.8YMT-TZ package?
The ePAD on the MIC5503-1.8YMT-TZ must be soldered to a GND plane to achieve the specified θJA = 250°C/W thermal resistance. Leaving it unconnected or floating increases junction temperature by >30°C at 300 mA, risking premature thermal shutdown and reduced reliability in continuous operation.
Is the MIC5503-1.8YMT-TZ compatible with Y5V ceramic capacitors?
No-Y5V dielectrics are explicitly discouraged for both input and output capacitors on the MIC5503-1.8YMT-TZ due to severe capacitance loss (>50%) over temperature. X5R or X7R ceramics are required to maintain ≥1 μF minimum effective capacitance across –40°C to +125°C, ensuring loop stability and transient response.
MIC5503-1.8YMT-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 60dB (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)
MIC5503-1.8YMT-TZ FAQ
1.How can I place an order for MIC5503-1.8YMT-TZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5503-1.8YMT-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 MIC5503-1.8YMT-TZ reliable?
The price and inventory of MIC5503-1.8YMT-TZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5503-1.8YMT-TZ is usually 5 days.
3.What payment methods are accepted for MIC5503-1.8YMT-TZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5503-1.8YMT-TZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5503-1.8YMT-TZ?
MIC5503-1.8YMT-TZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5503-1.8YMT-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 MIC5503-1.8YMT-TZ?
For technical support, including MIC5503-1.8YMT-TZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5503-1.8YMT-TZ requirements.
6.How does Aetrix verify that MIC5503-1.8YMT-TZ is sourced from the original manufacturer or authorized distributors?
All MIC5503-1.8YMT-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 MIC5503-1.8YMT-TZ meets industry standards.
7.What is the process for return or replacement of MIC5503-1.8YMT-TZ?
All MIC5503-1.8YMT-TZ units undergo pre-shipment inspection (PSI). If there is an issue with MIC5503-1.8YMT-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 MIC5503-1.8YMT-TZ part is unused and in its original packaging.
Return procedure for MIC5503-1.8YMT-TZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5503-1.8YMT-TZ Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
