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Microchip Technology MIC5371-4CYMT-TR
- Part No.:
- MIC5371-4CYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5371-4CYMT-TR.pdf
- Description:
- IC REG LINEAR 1V/1.2V 6TMLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC5371-4CYMT-TR from Micrel is a dual-channel, high-performance LDO voltage regulator delivering 150mA per channel with fixed output voltages of 1.2V and 1.0V. It features ±2% initial output accuracy, 155mV dropout at full load (150mA), and ultra-low ground current (32µA per LDO). Designed for space-constrained portable electronics, it powers core logic and I/O rails in camera phones and handheld devices.
For engineers reviewing the MIC5371-4CYMT-TR datasheet, MIC5371-4CYMT-TR pinout, MIC5371-4CYMT-TR application, or MIC5371-4CYMT-TR equivalent, key selection criteria include dual independent enable control, auto-discharge functionality on both outputs, stability with 1µF ceramic capacitors, and operation across –40°C to +125°C junction temperature.
Technical Context
The MIC5371-4CYMT-TR integrates two independent CMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated active-high enable inputs (EN1, EN2) and output pins (VOUT1, VOUT2). Its architecture includes internal reference, error amplifiers, and pass transistors optimized for low-noise, high-PSRR performance.
Unlike the MIC5370 variant, the MIC5371-4CYMT-TR incorporates an integrated auto-discharge circuit-activated when either EN pin is low-that applies a ~30Ω resistive load to the corresponding output to rapidly discharge external capacitors. This eliminates residual voltage hold-up during power-down sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 1.2V (VOUT1) and 1.0V (VOUT2), fixed and non-adjustable - enables direct powering of low-voltage core and I/O domains without external feedback networks. |
| Max Output Current | 150mA per channel - supports moderate-power digital ICs such as baseband processors and image signal processors in portable systems. |
| Dropout Voltage | 155mV at 150mA load - allows operation with minimal headroom (e.g., 1.35V input for 1.2V output), extending battery runtime in single-cell Li-ion applications. |
| Ground Current | 32µA per LDO at light load - minimizes quiescent power loss during standby, critical for always-on subsystems. |
| Auto-Discharge Resistance | 30Ω typical per output when disabled - ensures rapid (<1 ms) discharge of 1µF output caps, preventing unintended wake-up or latch-up in sequenced power-down. |
| PSRR | 60dB at 1kHz - suppresses ripple from noisy shared input rails (e.g., switching DC/DC outputs), preserving analog/RF subsystem integrity. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V), Li-polymer, and regulated 3.3V/5V system rails. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin MLF® (MT) with exposed thermal pad (internally connected to GND). RoHS-compliant, halogen-free mold compound, NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Common input for both LDOs; must be decoupled with ≥1µF ceramic capacitor to GND for stability and noise filtering. |
| 2 - GND | Ground Reference | Primary ground return for both regulators and internal circuitry; connects to EPAD for thermal conduction. |
| 3 - EN2 | Enable Input (LDO2) | Active-high logic control for second regulator; drives VOUT2 (1.0V); floating state prohibited - requires pull-down or controlled drive. |
| 4 - EN1 | Enable Input (LDO1) | Active-high logic control for first regulator; drives VOUT1 (1.2V); independent sequencing enables staggered power-up/down. |
| 5 - VOUT2 | LDO2 Output | Regulated 1.0V supply; auto-discharged via internal 30Ω FET when EN2 = low - prevents back-powering or floating rail issues. |
| 6 - VOUT1 | LDO1 Output | Regulated 1.2V supply; auto-discharged via internal 30Ω FET when EN1 = low - supports clean reset and low-power retention modes. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual enable control | EN1 and EN2 allow per-rail power gating - enables dynamic power management in multi-voltage SoC systems without external MOSFETs. |
| Integrated auto-discharge | 30Ω internal discharge FET per output activated on disable - eliminates need for external bleed resistors and reduces BOM count. |
| Stability with 1µF ceramic output caps | Guaranteed stable with X5R/X7R 0402 or 0603 1µF capacitors - simplifies layout, reduces footprint, and avoids ESR-sensitive compensation. |
| Thermal and current protection | Internal thermal shutdown and foldback current limiting - prevents damage during overload or poor heatsinking in compact enclosures. |
| Low-noise operation | 200µVRMS output noise (10Hz–100kHz) - suitable for noise-sensitive analog blocks like ADC references and RF bias rails. |
Applications
| Camera Phone Power Management | Mobile Baseband Core Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery for CMOS image sensor (1.2V analog/digital core) and ISP (1.0V I/O interface) in slim smartphone modules. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing independently sequenced, low-noise, fast-discharge supplies during capture-to-sleep transitions. Use Value: Auto-discharge prevents sensor latch-up during rapid mode switching; 155mV dropout extends usable battery range by >8% vs. legacy 300mV-dropout LDOs. |
Use Scenario: Powering ARM Cortex-A series application processor cores (1.2V) and memory I/O (1.0V) in battery-operated handhelds. IC Role / Device Role / Timing Role: System-level dual LDO supplying tightly regulated, low-ripple rails with independent enable for DVFS and deep-sleep states. Use Value: 32µA quiescent current per LDO reduces standby power by >40% versus comparable dual-LDOs; 60dB PSRR maintains signal integrity under PMIC switching noise. |
| GPS/PMP Audio Codec Bias | Portable Medical Sensor Hub |
|
Use Scenario: Generating clean 1.2V and 1.0V rails for GPS RF front-end LNA and audio DAC/ADC in portable navigation devices. IC Role / Device Role / Timing Role: Low-noise dual LDO isolating sensitive analog sections from noisy digital subsystems; fast turn-on (<125µs) supports instant-on functionality. Use Value: 200µVRMS noise floor meets SNR requirements for 24-bit audio conversion; 1µF capacitor compatibility reduces PCB area by 30% vs. 10µF tantalum solutions. |
Use Scenario: Powering ultra-low-power MCU (1.2V core) and biosensor interface ASIC (1.0V I/O) in wearable health monitors. IC Role / Device Role / Timing Role: Precision dual LDO enabling zero-current shutdown and rapid rail collapse during sensor sleep cycles to meet <1µA system standby targets. Use Value: Sub-1µA shutdown current (0.05µA typical) and 30Ω auto-discharge ensure reliable reset and eliminate leakage-induced false wake-ups in long-duration deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS70245PWPR | 200mA dual LDO, 1.2V/1.0V fixed, but no auto-discharge; higher quiescent current (85µA per LDO); larger 20-pin TSSOP package. | Lacks integrated discharge - requires external resistors for rail collapse; unsuitable for space-constrained or ultra-low-power designs needing fast discharge. | Select only if higher output current margin is required and board area allows larger package; verify external discharge circuit design. |
| NCP114AMX1210T2G | 150mA dual LDO, 1.2V/1.0V, no auto-discharge; 1.6mm × 1.6mm DFN but only 5-pin (shared EN); lower PSRR (45dB @1kHz). | Single enable pin forces simultaneous on/off - eliminates independent sequencing; insufficient PSRR for RF-sensitive applications. | Consider only for cost-sensitive, non-sequencing applications where rail collapse timing is not critical and noise immunity is secondary. |
Compared with TPS70245PWPR and NCP114AMX1210T2G, the MIC5371-4CYMT-TR uniquely delivers independent enable control, guaranteed 30Ω auto-discharge per rail, and 60dB PSRR in the smallest 6-pin 1.6mm × 1.6mm footprint - making it optimal for miniaturized, low-power, and noise-critical portable systems.
Availability
MIC5371-4CYMT-TR is available at Aetrix Electronics and suitable for camera phone power management, mobile baseband core supply, GPS/PMP audio codec bias, portable medical sensor hubs, and other applications requiring stable component supply with precise dual-rail regulation and fast discharge capability.
Supply support for MIC5371-4CYMT-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 analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. Known for high-reliability, small-footprint power ICs.
The MIC5371-4CYMT-TR belongs to Micrel's high-performance dual-LDO family designed specifically for battery-powered portable electronics requiring independent rail control, ultra-low quiescent current, and integrated auto-discharge - targeting camera modules, handheld computing, and wearables.
FAQ
What is the output voltage configuration of the MIC5371-4CYMT-TR?
The MIC5371-4CYMT-TR provides two fixed, non-adjustable output voltages: VOUT1 = 1.2V and VOUT2 = 1.0V. These values are laser-trimmed during manufacturing and cannot be modified externally. The part marking "4C" corresponds to the 1.2V/1.0V combination per Micrel's ordering guide, and this configuration is verified in the official datasheet revision M9999-052011-C.
Does the MIC5371-4CYMT-TR support independent power sequencing?
Yes, the MIC5371-4CYMT-TR supports fully independent power sequencing via separate active-high enable inputs: EN1 controls VOUT1 (1.2V) and EN2 controls VOUT2 (1.0V). Each enable pin can be driven independently with standard CMOS logic levels (VIH ≥ 1.2V, VIL ≤ 0.2V), allowing staggered turn-on, selective shutdown, and custom power-state transitions without affecting the other rail.
How does the auto-discharge function operate in the MIC5371-4CYMT-TR?
In the MIC5371-4CYMT-TR, auto-discharge activates automatically when either EN1 or EN2 is driven low: a ~30Ω internal NMOS FET connects the corresponding output (VOUT1 or VOUT2) to GND, discharging external capacitors rapidly. This behavior is exclusive to the MIC5371 series (not present in MIC5370) and is confirmed in the block diagram and electrical characteristics table of the datasheet.
What capacitor values are required for stable operation of the MIC5371-4CYMT-TR?
The MIC5371-4CYMT-TR requires a minimum 1µF ceramic output capacitor per rail (COUT1 and COUT2), and a 1µF ceramic input capacitor (CIN) from VIN to GND. X5R or X7R dielectrics are recommended; Y5V is not advised due to excessive capacitance drift over temperature. Stability is guaranteed with these values - no additional bulk or bypass caps are needed for basic operation.
Is the MIC5371-4CYMT-TR RoHS-compliant and lead-free?
Yes, the MIC5371-4CYMT-TR is RoHS-compliant and lead-free, using a Pb-free (NiPdAu) lead finish and halogen-free mold compound, as explicitly stated in the Ordering Information section and Package Notes of the official datasheet. The "TR" suffix denotes tape-and-reel packaging compliant with JEDEC standards.
MIC5371-4CYMT-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):
- 1V, 1.2V
- 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)
MIC5371-4CYMT-TR FAQ
1.How can I place an order for MIC5371-4CYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5371-4CYMT-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 MIC5371-4CYMT-TR reliable?
The price and inventory of MIC5371-4CYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5371-4CYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5371-4CYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5371-4CYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5371-4CYMT-TR?
MIC5371-4CYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5371-4CYMT-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 MIC5371-4CYMT-TR?
For technical support, including MIC5371-4CYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5371-4CYMT-TR requirements.
6.How does Aetrix verify that MIC5371-4CYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5371-4CYMT-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 MIC5371-4CYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5371-4CYMT-TR?
All MIC5371-4CYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5371-4CYMT-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 MIC5371-4CYMT-TR part is unused and in its original packaging.
Return procedure for MIC5371-4CYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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