My Inquiry
My Account
Microchip Technology MIC5371-SSYMT-TR
- Part No.:
- MIC5371-SSYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5371-SSYMT-TR.pdf
- Description:
- IC REG LINEAR 3.3V/3.3V 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,947
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5371-SSYMT-TR from Micrel is a dual-channel, high-accuracy, low-dropout linear regulator IC delivering two independent 150mA outputs at fixed 3.3V/3.3V, housed in a 1.6mm × 1.6mm Thin MLF® package. It features ±2% initial output accuracy, 155mV dropout at full load, and ultra-low 32µA quiescent current per LDO - optimized for battery-powered camera phones and portable handhelds requiring tight voltage regulation and fast transient response.
For engineers reviewing the MIC5371-SSYMT-TR datasheet, MIC5371-SSYMT-TR pinout, MIC5371-SSYMT-TR application, or MIC5371-SSYMT-TR equivalent, key selection criteria include dual independent enable control, auto-discharge functionality (30Ω typical discharge FET), stable operation with 1µF ceramic output capacitors, and thermal shutdown/current-limit protection across –40°C to +125°C junction temperature range.
Technical Context
The MIC5371-SSYMT-TR integrates two CMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated active-high enable inputs (EN1, EN2) and independent output pins (VOUT1, VOUT2). Its architecture includes an internal reference, error amplifiers, and pass transistors optimized for low-noise (200µVRMS) and high PSRR (60dB @ 1kHz).
Unlike the MIC5370 variant, the MIC5371-SSYMT-TR adds an integrated auto-discharge circuit activated when either EN pin is driven low - applying a 30Ω resistive load to the corresponding output to rapidly deplete external capacitance. This eliminates residual voltage hold-up during power sequencing in multi-rail portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V / 3.3V - eliminates external feedback network; supports dual-core SoC I/O and core rail separation. |
| Max Output Current | 150mA per channel - sufficient for baseband processors, camera ISPs, and RF front-end biasing without thermal derating in 1.6mm × 1.6mm footprint. |
| Dropout Voltage | 155mV @ 150mA - enables operation down to 3.455V input for 3.3V outputs, critical for Li-ion battery discharge tail-end support. |
| Quiescent Current | 32µA per LDO - reduces standby power loss in always-on subsystems such as GPS receivers or sensor hubs. |
| Output Accuracy | ±2% initial, ±3% over –40°C to +125°C - ensures reliable logic-level compliance for 3.3V-tolerant interfaces (e.g., SDIO, UART, I²C). |
| PSRR | 60dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters in compact PCB layouts. |
| Auto-Discharge | 30Ω typical NFET per output - discharges 10µF output cap in <1ms, preventing unintended wake-up or latch-up in power-gated domains. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin MLF® (Pb-free, halogen-free, NiPdAu finish), exposed thermal pad internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Common input for both LDOs; accepts 2.5V–5.5V; requires 1µF ceramic decoupling to GND. |
| 2 - GND | Ground Reference | Power and signal return; connects to exposed EPAD for thermal conduction and noise reduction. |
| 3 - EN2 | Enable Input (LDO2) | Active-high logic control; drives LDO2 output on/off; must not float - tie to GND or host GPIO. |
| 4 - EN1 | Enable Input (LDO1) | Independent active-high control for LDO1; enables staggered power-up/down sequencing. |
| 5 - VOUT2 | LDO2 Output | Regulated 3.3V supply; auto-discharged via internal 30Ω FET when EN2 = low. |
| 6 - VOUT1 | LDO1 Output | Regulated 3.3V supply; auto-discharged via internal 30Ω FET when EN1 = low. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1/EN2 allow per-rail power gating - essential for dynamic voltage scaling in mobile APs and camera modules. |
| Auto-discharge circuit | 30Ω internal discharge FET per output - eliminates need for external bleed resistors and saves board space in space-constrained designs. |
| Stable with 1µF ceramic caps | Eliminates requirement for large bulk capacitors - reduces BOM cost and PCB area while maintaining stability across temperature. |
| Thermal shutdown & current limit | Protects against short-circuit or overload events up to 550mA peak - prevents damage during hot-plug or ESD-induced faults. |
| Low-noise output | 200µVRMS integrated noise (10Hz–100kHz) - suitable for noise-sensitive analog blocks like ADC references or RF synthesizers. |
Applications
| Camera Phone Power Management | Mobile Baseband Core Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to image sensor ISP and digital baseband processor in slim smartphone form factors. IC Role / Device Role / Timing Role: Dual LDO providing isolated, sequenced 3.3V rails with independent enable control and rapid output discharge during mode transitions. Use Value: Prevents cross-talk between analog imaging and digital processing domains while enabling fast sleep/wake cycles without residual voltage interference. |
Use Scenario: Dedicated 3.3V supply for cellular modem baseband IC requiring tight voltage tolerance and low noise. IC Role / Device Role / Timing Role: Low-dropout regulator delivering clean, accurate 3.3V under varying battery voltage (3.0V–4.2V) and load transients. Use Value: Maintains 3.3V logic integrity during RF transmission bursts, avoiding data corruption or modem reset due to voltage droop. |
| GPS Receiver Bias Supply | Portable Media Player Audio Codec Rail |
|
Use Scenario: Always-on 3.3V supply for GPS RF front-end and baseband in PMPs and wearables. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO sustaining GPS lock during deep-sleep states with minimal battery drain. Use Value: Enables <100µA system standby current by disabling non-critical rails while keeping GPS receiver powered and ready. |
Use Scenario: Clean 3.3V supply for audio codec and DAC in battery-powered media players. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating sensitive analog audio circuitry from noisy digital subsystems. Use Value: Reduces audible hiss and distortion by suppressing switching noise from display drivers and USB PHYs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5370-SSYMT-TR | No auto-discharge; identical pinout, specs, and package - only differs in EN-driven output discharge capability. | Suitable where output hold-up is acceptable or external discharge is implemented. | Select MIC5370-SSYMT-TR if auto-discharge is unnecessary and cost minimization is prioritized. |
| Torex XC6223D331MR-G | Single-output 3.3V LDO (150mA); no dual-channel or auto-discharge; 1.2V–6.0V input range. | Requires two devices for dual-rail use; lacks independent enable and discharge control. | Choose only when single-rail operation suffices and board area allows duplication. |
Compared with MIC5371-SSYMT-TR, the MIC5370-SSYMT-TR omits auto-discharge but matches all electrical and mechanical specs - making it a lower-cost alternative where controlled power-down isn't required. The XC6223D331MR-G provides comparable single-rail performance but increases component count and design complexity for dual-rail needs.
Availability
MIC5371-SSYMT-TR is available at Aetrix Electronics and suitable for camera phones, GPS receivers, portable media players, and handheld computing devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5371-SSYMT-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 solutions targeting portable and industrial markets.
The MIC5371-SSYMT-TR belongs to Micrel's high-density dual-LDO family designed specifically for space-constrained, battery-operated consumer electronics requiring precision dual-rail regulation, ultra-low quiescent current, and robust power sequencing.
FAQ
What is the primary functional difference between MIC5371-SSYMT-TR and MIC5370-SSYMT-TR?
The MIC5371-SSYMT-TR includes an integrated auto-discharge circuit that applies a 30Ω load to each output when its respective enable pin is driven low - rapidly discharging external capacitors. The MIC5370-SSYMT-TR lacks this feature and holds output voltage after disable unless external discharge components are added. All other electrical and mechanical specifications match identically.
Does MIC5371-SSYMT-TR require external components for stability?
No. The MIC5371-SSYMT-TR is stable with only 1µF ceramic output capacitors per rail and a 1µF ceramic input capacitor - no additional compensation networks, ESR requirements, or bypass capacitors are needed. X5R/X7R dielectrics are recommended; Y5V types are discouraged due to temperature-dependent capacitance loss.
Can MIC5371-SSYMT-TR operate with a 2.5V input while delivering 3.3V outputs?
No. The MIC5371-SSYMT-TR cannot regulate 3.3V outputs from a 2.5V input because its minimum input voltage must exceed the output voltage by at least the dropout voltage (155mV @ 150mA). A 2.5V input is below the required 3.455V minimum for 3.3V regulation. Valid input range is 2.5V–5.5V, but usable minimum depends on output voltage and load.
What thermal considerations apply to MIC5371-SSYMT-TR in continuous 150mA dual-rail operation?
At 150mA per rail with 3.6V input and 3.3V outputs, MIC5371-SSYMT-TR dissipates ~0.135W. With θJA = 90°C/W, junction temperature rise is ~12°C above ambient. For safe operation up to +125°C junction, maximum ambient temperature is ~113°C - though PCB copper area and airflow significantly influence real-world thermal performance.
Is MIC5371-SSYMT-TR compatible with lead-free reflow soldering processes?
Yes. The MIC5371-SSYMT-TR uses a Pb-free (RoHS-compliant) 1.6mm × 1.6mm Thin MLF® package with NiPdAu lead finish and halogen-free mold compound, rated for standard lead-free reflow profiles with peak temperatures up to 260°C for 10 seconds.
MIC5371-SSYMT-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:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 150mA, 0.31V @ 150mA
- Current - Output:
- 150mA, 150mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 85 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:
- 6-TMLF® (1.6x1.6)
MIC5371-SSYMT-TR FAQ
1.How can I place an order for MIC5371-SSYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5371-SSYMT-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 MIC5371-SSYMT-TR reliable?
The price and inventory of MIC5371-SSYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5371-SSYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5371-SSYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5371-SSYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5371-SSYMT-TR?
MIC5371-SSYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5371-SSYMT-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 MIC5371-SSYMT-TR?
For technical support, including MIC5371-SSYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5371-SSYMT-TR requirements.
6.How does Aetrix verify that MIC5371-SSYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5371-SSYMT-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 MIC5371-SSYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5371-SSYMT-TR?
All MIC5371-SSYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5371-SSYMT-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 MIC5371-SSYMT-TR part is unused and in its original packaging.
Return procedure for MIC5371-SSYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5371-SSYMT-TR 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…
