My Inquiry
My Account
Microchip Technology MIC5259-3.0BD5-TR
- Part No.:
- MIC5259-3.0BD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5259-3.0BD5-TR.pdf
- Description:
- IC REG LINEAR 3V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5259-3.0BD5-TR from Micrel is a 3.0V fixed-output, 300mA CMOS low-dropout linear regulator optimized for RF and battery-powered systems. It delivers 1.5% initial output accuracy, 300mV dropout at full load, and ultra-low 30µV(rms) output noise with a dedicated noise-bypass pin - enabling clean power delivery in cellular transceivers and portable computing.
For engineers reviewing the MIC5259-3.0BD5-TR datasheet, MIC5259-3.0BD5-TR pinout, MIC5259-3.0BD5-TR application, or MIC5259-3.0BD5-TR equivalent, key selection criteria include PSRR (70dB @ 1kHz), TTL-compatible enable input, ceramic-capacitor stability, thermal shutdown, and SOT-23-5 package compatibility for space-constrained designs.
Technical Context
The MIC5259-3.0BD5-TR employs a CMOS pass element with active-clamp shutdown and internal reference bypassing to achieve fast transient response and near-zero off-state current (≤1µA). Its architecture integrates under-voltage lockout, thermal sensing, and current limiting within a single die.
It operates across 2.7V–6.0V input range while maintaining tight line regulation (±0.3%/V) and load regulation (±0.6% over 0.1–300mA), with ground current rising only from 105µA (light load) to 250µA (300mA) - critical for long battery life in always-on subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1.5% initial accuracy ensures stable core logic supply without external feedback components. |
| Max Output Current | 300mA continuous output supports baseband processors, RF front-ends, and sensor hubs in handheld devices. |
| Dropout Voltage | 300mV at 300mA enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (3.2V typical) sources. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - meets stringent spectral purity requirements for GSM/UMTS receivers. |
| PSRR | 70dB @ 1kHz; >53dB up to 10kHz - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 105µA at no load; ≤1µA in shutdown - extends standby time in pagers and IoT edge nodes. |
| Enable Threshold | VIH = 1.6V, VIL = 0.4V - compatible with 1.8V/3.3V GPIOs without level-shifting circuitry. |
Pinout & Package
Package: 5-pin Thin SOT-23-5 (D5), 2.9mm × 1.6mm footprint, 1.1mm height - suitable for high-density PCB layouts in mobile modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Accepts 2.7–6.0V unregulated input; requires 1.0µF ceramic bypass to GND for stability. |
| 2 (GND) | Ground Reference | Low-impedance return path for load, quiescent, and bypass currents; must be connected to system ground plane. |
| 3 (EN) | Enable/Shutdown Input | TTL-compatible active-high control; drives output ON when ≥1.6V, OFF when ≤0.4V; must not float. |
| 4 (BYP) | Noise Bypass Terminal | Connects to 0.01–1.0µF capacitor to GND to reduce reference noise and improve PSRR by up to 12dB. |
| 5 (OUT) | Regulated Output | Delivers 3.0V ±1.5% to load; requires ≥1.0µF ceramic output capacitor (X7R/X5R) with ESR ≤300mΩ. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Noise Regulation | 30µV(rms) output noise with optional 0.01µF BYP cap - eliminates need for post-LDO LC filtering in sensitive RF chains. |
| Active Shutdown Clamp | Internal N-MOSFET discharges output capacitor during disable - prevents residual voltage hold-up on powered-down peripherals. |
| Ceramic-Capacitor Stability | Stable with 1.0µF X7R/X5R ceramics (ESR ≤300mΩ); eliminates electrolytic/tantalum capacitors and associated size/reliability trade-offs. |
| High PSRR at Low VIN | 70dB rejection at 1kHz even when VIN = VOUT + 0.3V - maintains clean output during brown-out conditions in battery discharge profiles. |
| Zero Off-State Current | ≤1µA shutdown current - enables microamp-level system sleep modes without external load switches. |
Applications
| Cellular Transceiver Power | Laptop Baseband Core Supply |
|---|---|
Use Scenario: Powering GSM/UMTS RF transceivers requiring sub-50µV noise floor and fast load transient response. IC Role / Device Role / Timing Role: Primary low-noise analog supply rail for VCOs, mixers, and ADCs in cellular radio front-ends. Use Value: Enables 30µV(rms) noise performance without additional filtering, preserving receiver sensitivity and adjacent-channel rejection. |
Use Scenario: Delivering stable 3.0V to baseband processors in ultraportable notebooks during dynamic CPU load changes. IC Role / Device Role / Timing Role: Core voltage regulator for ARM-based baseband ICs with TTL-enable synchronization to system power states. Use Value: Maintains <±1.5% regulation across 0.1–300mA load steps and 2.7–5.5V input range, preventing processor reset events. |
| Industrial Handheld Scanner | Wireless Sensor Node MCU Supply |
Use Scenario: Providing regulated 3.0V to laser diode drivers and image sensors in ruggedized barcode scanners. IC Role / Device Role / Timing Role: Main power source for analog signal chain and precision timing circuits in battery-operated field equipment. Use Value: Delivers 300mV dropout and 105µA quiescent current - extends runtime on two AA cells from 8 to >12 hours. |
Use Scenario: Supplying ultra-low-power MCUs (e.g., MSP430, nRF52) in battery-powered environmental sensors with multi-year lifespan targets. IC Role / Device Role / Timing Role: Always-on LDO for RTC, RAM retention, and wake-up circuitry with active shutdown control via MCU GPIO. Use Value: Achieves ≤1µA shutdown current and no-load stability - eliminates need for external power-gating FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79530DBVR | 300mA, 3.0V, 170µA IQ, 250mV dropout @ 300mA; no BYP pin; SOT-23-5 package. | Lacks noise-bypass capability; lower PSRR (60dB @ 1kHz); suited for digital-only loads where noise is less critical. | Select when board space is constrained and RF noise immunity is secondary to cost and simplicity. |
| AP2112K-3.0W5-7 | 600mA, 3.0V, 60µA IQ, 400mV dropout @ 600mA; no BYP pin; same SOT-23-5 footprint. | Higher current rating but higher dropout and no noise-reduction pin; optimized for general-purpose digital rails. | Choose for higher-current digital subsystems where 300mV dropout margin is insufficient and noise is not dominant. |
Compared with TPS79530DBVR and AP2112K-3.0W5-7, the MIC5259-3.0BD5-TR uniquely combines 30µV(rms) noise, 70dB PSRR, and a dedicated BYP pin - making it irreplaceable in RF-sensitive designs where spectral purity directly impacts link budget and compliance testing.
Availability
MIC5259-3.0BD5-TR is available at Aetrix Electronics and suitable for cellular transceivers, industrial handheld scanners, and wireless sensor node MCU supplies requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MIC5259-3.0BD5-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. It emphasized high-performance, small-footprint power ICs for portable electronics.
The MIC5259 family was designed specifically for ultra-low-noise, high-PSRR power delivery in battery-operated RF and portable computing systems - targeting applications where conventional LDOs introduce unacceptable noise coupling.
FAQ
What is the maximum input voltage rating for MIC5259-3.0BD5-TR?
The absolute maximum input voltage for MIC5259-3.0BD5-TR is +7V, but the recommended operating range is +2.7V to +6.0V per datasheet specifications. Exceeding 6.0V may trigger internal protection or degrade long-term reliability, even if within absolute limits. Always maintain at least 300mV headroom above 3.0V output for proper regulation.
Does MIC5259-3.0BD5-TR require an external bypass capacitor on the BYP pin?
The BYP pin of MIC5259-3.0BD5-TR is optional but strongly recommended for low-noise applications: a 0.01µF ceramic capacitor to GND reduces output noise to 30µV(rms) and improves PSRR. Leaving BYP open results in higher baseline noise (~100µV(rms)) and reduced ripple rejection - acceptable only in non-RF digital loads.
Can MIC5259-3.0BD5-TR operate without an output capacitor?
No - MIC5259-3.0BD5-TR requires a minimum 1.0µF ceramic output capacitor (X7R/X5R, ESR ≤300mΩ) for stability. Omitting it causes oscillation or regulation failure. Unlike some LDOs, it does not support no-capacitor operation; the design is explicitly optimized for 1.0µF, and larger values do not improve transient response significantly.
What is the shutdown current of MIC5259-3.0BD5-TR?
The shutdown current of MIC5259-3.0BD5-TR is ≤1µA when EN is held ≤0.4V, verified across –40°C to +125°C. This "zero" off-mode current enables multi-year battery life in always-off sensor nodes. The internal active clamp also discharges the output capacitor, preventing unintended wake-up from residual voltage.
Is MIC5259-3.0BD5-TR pin-compatible with other MIC5259 variants in SOT-23-5?
Yes - all MIC5259-x.xBD5 variants (e.g., MIC5259-2.8BD5, MIC5259-3.3BD5) share identical 5-pin Thin SOT-23-5 pinout, thermal characteristics, and enable/bypass functionality. Only the output voltage differs; PCB layout and support components remain unchanged across the BD5 series.
MIC5259-3.0BD5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 65dB ~ 53dB (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:
- TSOT-23-5
MIC5259-3.0BD5-TR FAQ
1.How can I place an order for MIC5259-3.0BD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5259-3.0BD5-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 MIC5259-3.0BD5-TR reliable?
The price and inventory of MIC5259-3.0BD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5259-3.0BD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5259-3.0BD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5259-3.0BD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5259-3.0BD5-TR?
MIC5259-3.0BD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5259-3.0BD5-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 MIC5259-3.0BD5-TR?
For technical support, including MIC5259-3.0BD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5259-3.0BD5-TR requirements.
6.How does Aetrix verify that MIC5259-3.0BD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5259-3.0BD5-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 MIC5259-3.0BD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5259-3.0BD5-TR?
All MIC5259-3.0BD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5259-3.0BD5-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 MIC5259-3.0BD5-TR part is unused and in its original packaging.
Return procedure for MIC5259-3.0BD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5259-3.0BD5-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…
