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Microchip Technology MIC5252-1.8BML-TR
- Part No.:
- MIC5252-1.8BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5252-1.8BML-TR.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
MIC5252-1.8BML-TR from Micrel is a 1.8V fixed-output, 150mA ultra-low-noise CMOS LDO voltage regulator in a 6-pin 2mm × 2mm MLF™ package, featuring 1% initial accuracy, 135mV dropout at 150mA, and 30µV(rms) output noise - optimized for RF power stages and battery-powered handheld devices requiring clean, stable bias.
For engineers reviewing the MIC5252-1.8BML-TR datasheet, MIC5252-1.8BML-TR pinout, MIC5252-1.8BML-TR application, or MIC5252-1.8BML-TR equivalent, key selection criteria include low-noise performance with bypass capacitor support, TTL-compatible enable control, ceramic-capacitor stability, thermal shutdown protection, and operation across –40°C to +125°C junction temperature.
Technical Context
The MIC5252-1.8BML-TR integrates a precision bandgap reference, error amplifier, and PMOS pass transistor with active-clamp shutdown logic. Its architecture enables fast transient response and maintains regulation down to zero load while rejecting supply ripple up to 63dB at 10Hz.
It uses a dedicated BYP pin to shunt reference noise via an external 0.01µF–1.0µF capacitor, reducing output noise without compromising startup time due to its internal quick-start circuit. The EN pin provides TTL-level active-high control with <1µA shutdown current and defined VIH/VIL thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% initial accuracy ensures precise biasing for low-voltage logic and RF ICs without external feedback. |
| Dropout Voltage | 135mV at 150mA enables operation from 2.7V input to deliver full rated current - critical for single-cell Li-ion or alkaline systems. |
| Output Noise | 30µV(rms), 10Hz–100kHz with 0.01µF BYP capacitor - meets stringent RF front-end noise requirements (e.g., LNAs, mixers). |
| PSRR | 63dB at 10Hz (CBYP=0.01µF); 48dB at 10kHz - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 90µA typical at no load - extends battery life in always-on sensor or standby circuits without sacrificing regulation. |
| Enable Threshold | VIH = 1.6V min, VIL = 0.4V max - compatible with 1.8V/3.3V GPIOs and ensures deterministic on/off control. |
| Thermal Shutdown | 150°C activation with 10°C hysteresis - protects against sustained overload in compact layouts with θJA = 90°C/W (MLF). |
Pinout & Package
Package: 6-pin 2mm × 2mm MicroLeadFrame (MLF™) with exposed ground pad (EP). RoHS-compliant, Pb-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | TTL-compatible active-high control; must be driven - floating state causes indeterminate output. |
| 2 - GND | Ground Reference | Primary signal and power return; internally connected to exposed pad (EP) for thermal and electrical integrity. |
| 3 - IN | Input Supply | Accepts 2.7V–6.0V; requires ≥1µF low-ESR ceramic bypass to GND for stability and PSRR optimization. |
| 4 - OUT | Regulated Output | Delivers 1.8V at up to 150mA; requires ≥1µF ceramic output capacitor (X7R/X5R, ESR ≤300mΩ) for stability. |
| 5 - BYP | Noise Bypass | Connects to GND via 0.01µF–1.0µF capacitor to reduce reference noise - directly lowers output RMS noise floor. |
| 6 - NC | No Connection | Unbonded die pad; no internal function - leave unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor - enables clean power for sensitive RF receivers and ADC references. |
| Active-clamp shutdown | Internal N-MOSFET discharges output capacitor when disabled - prevents residual voltage hold-up on downstream loads. |
| Ceramic-capacitor stability | Stable with ≥1µF X7R/X5R ceramic output caps (ESR ≤300mΩ) - eliminates need for bulky tantalum or electrolytic capacitors. |
| Zero-load regulation | Maintains 1.8V output with 0mA load - supports CMOS RAM keep-alive, real-time clocks, and always-on monitoring circuits. |
| Faster transient response | Optimized loop compensation delivers <50µs recovery from 50mA load step - minimizes voltage dip in burst-mode digital loads. |
Applications
| Cellular Front-End Modules | Wearable Sensor Nodes |
|---|---|
|
Use Scenario: Powering LNA, mixer, and VCO blocks in 4G/5G RF transceivers where supply noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise 1.8V bias regulator with BYP pin decoupling - serves as primary analog supply rail. Use Value: 30µV(rms) noise and 63dB PSRR at 10Hz prevent baseband interference and maintain RF signal integrity under dynamic load. |
Use Scenario: Providing regulated 1.8V to MEMS accelerometers, optical heart-rate sensors, and BLE SoCs in compact wearables. IC Role / Device Role / Timing Role: Low-quiescent-current LDO with active shutdown - powers sensor subsystem during motion-triggered wake cycles. Use Value: 90µA IQ and "zero" off-mode current extend coin-cell battery life beyond 12 months in intermittent-sensing applications. |
| Industrial Handheld Terminals | Medical Point-of-Care Devices |
|
Use Scenario: Supplying 1.8V core voltage to ARM Cortex-M microcontrollers and touch controllers in ruggedized barcode scanners. IC Role / Device Role / Timing Role: High-accuracy (±1%) LDO with thermal shutdown - ensures reliable MCU operation across –40°C to +85°C ambient. Use Value: 135mV dropout allows direct use of 3.3V system rail, eliminating intermediate conversion stages and reducing BOM count. |
Use Scenario: Delivering clean 1.8V to low-power ADCs and patient-monitoring analog front-ends in portable ECG and SpO₂ units. IC Role / Device Role / Timing Role: Stable, no-load-capable regulator with tight line/load regulation - maintains reference accuracy during battery voltage sag. Use Value: ±2% output accuracy over temperature and <1.5% load regulation ensure consistent measurement resolution across operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 150mA, 1.8V, 170mV dropout @150mA; 40µV(rms) noise; SOT-23-5 only; no BYP pin. | Lacks noise-bypass capability and MLF package - less suitable for RF-critical designs requiring minimal board area. | Choose when MLF footprint is not required and noise budget allows +10µV(rms) increase. |
| Torex XC6206P182MR-G | 150mA, 1.8V, 200mV dropout @150mA; 45µV(rms) noise; SOT-25 only; no enable pin. | No enable control or thermal shutdown - limits use in power-managed systems requiring sequencing or fault protection. | Choose only for simple always-on 1.8V rails where enable and safety features are unnecessary. |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the MIC5252-1.8BML-TR uniquely combines MLF package miniaturization, dedicated noise-bypass pin, TTL-enable interface, and 30µV(rms) noise - making it the only option among the three qualified for space-constrained, RF-sensitive, and power-gated applications.
Availability
MIC5252-1.8BML-TR is available at Aetrix Electronics and suitable for cellular front-end modules, wearable sensor nodes, industrial handheld terminals, medical point-of-care devices, and battery-powered instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for MIC5252-1.8BML-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.
The MIC5252 series was designed specifically for ultra-low-noise, high-PSRR power regulation in handheld wireless and RF-intensive applications - emphasizing ceramic-capacitor compatibility, miniature packaging, and precision voltage delivery.
FAQ
What is the minimum input voltage required for MIC5252-1.8BML-TR to regulate at full 150mA output?
The MIC5252-1.8BML-TR requires a minimum input voltage of 2.7V to operate, but to sustain 150mA output with guaranteed regulation, VIN must be at least VOUT + dropout = 1.8V + 0.135V = 1.935V. However, per Absolute Maximum Ratings and Electrical Characteristics, the device is specified for VIN ≥ 2.7V - so 2.7V is the practical minimum input for full-load operation. At 2.7V input, dropout margin is 865mV, well above the 135mV typical value.
Can MIC5252-1.8BML-TR operate without the BYP capacitor?
Yes, MIC5252-1.8BML-TR functions without the BYP capacitor - the BYP pin may be left open per datasheet Pin Description. However, omitting the 0.01µF capacitor increases output noise from 30µV(rms) to approximately 100µV(rms), degrading performance in RF or precision analog applications. The device remains stable and regulated without it.
Does MIC5252-1.8BML-TR require an input capacitor, and what type is recommended?
Yes, MIC5252-1.8BML-TR requires a minimum 1.0µF ceramic input capacitor from IN to GND for stability and optimal PSRR. X7R or X5R dielectric types are recommended due to stable capacitance over temperature and low ESR. Avoid high-ESR electrolytics or Z5U/Y5V ceramics, which risk instability or reduced noise rejection.
What is the thermal resistance (θJA) of the MIC5252-1.8BML-TR in its MLF package?
The MIC5252-1.8BML-TR has a junction-to-ambient thermal resistance (θJA) of 90°C/W when mounted on a standard PCB layout with recommended copper pour. This value assumes proper connection of the exposed pad (EP) to a solid ground plane. With 150mA load and 2.7V input, power dissipation is ~135mW, resulting in ~12°C junction rise above ambient - well within the –40°C to +125°C operating range.
Is MIC5252-1.8BML-TR compatible with 1.8V GPIO for direct enable control?
Yes, MIC5252-1.8BML-TR is fully compatible with 1.8V GPIO for EN control: its VIH threshold is 1.6V minimum, and VIL is 0.4V maximum - both satisfied by standard 1.8V logic outputs. The enable input draws <1µA, imposing negligible load on the driving source. Never leave EN floating, as it may cause erratic output behavior.
MIC5252-1.8BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 63dB ~ 48dB (10Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
MIC5252-1.8BML-TR FAQ
1.How can I place an order for MIC5252-1.8BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5252-1.8BML-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 MIC5252-1.8BML-TR reliable?
The price and inventory of MIC5252-1.8BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5252-1.8BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5252-1.8BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5252-1.8BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5252-1.8BML-TR?
MIC5252-1.8BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5252-1.8BML-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 MIC5252-1.8BML-TR?
For technical support, including MIC5252-1.8BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5252-1.8BML-TR requirements.
6.How does Aetrix verify that MIC5252-1.8BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5252-1.8BML-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 MIC5252-1.8BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5252-1.8BML-TR?
All MIC5252-1.8BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5252-1.8BML-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 MIC5252-1.8BML-TR part is unused and in its original packaging.
Return procedure for MIC5252-1.8BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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