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Microchip Technology MIC2212-SMYML-TR
- Part No.:
- MIC2212-SMYML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2212-SMYML-TR.pdf
- Description:
- IC REG LINEAR 3.3V/2.8V 10MLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC2212-SMYML-TR from Micrel is a dual µCap low-dropout linear regulator IC with integrated power-on reset (POR) circuitry, designed for precision voltage regulation and system initialization in portable electronics. It delivers 150mA from VOUT1 (3.3V fixed) and 300mA from VOUT2 (2.8V fixed), features 1% initial output accuracy, 80mV dropout at 100mA, and ultra-low 48µA ground current - enabling long battery life in cellular handsets and wireless modems.
For engineers reviewing the MIC2212-SMYML-TR datasheet, MIC2212-SMYML-TR pinout, MIC2212-SMYML-TR application, or MIC2212-SMYML-TR equivalent, key selection criteria include dual-output LDO performance under light-load efficiency, programmable POR delay via external capacitor, TTL-compatible enable control, ceramic-capacitor stability, and thermal shutdown protection in the 3mm × 3mm MLF package.
Technical Context
The MIC2212-SMYML-TR integrates two independent LDO regulators sharing a common input (VIN) but with separate enable inputs (EN1, EN2) and outputs (VOUT1, VOUT2). Regulator 2 includes an open-drain POR output triggered when VOUT2 falls below 90% of nominal, with delay set by a current-source-driven capacitor on the SET pin (1.25V threshold, ~1µA source).
Its µCap architecture eliminates need for large electrolytic capacitors: stable operation requires only 1µF X7R/X5R ceramic per output and a 0.01µF bypass capacitor on CBYP to reduce noise and improve PSRR (60dB @ 1kHz). Ground current remains at 48µA with both outputs disabled and rises to 60µA under full load (150mA + 300mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3V (VOUT1, 150mA max) and 2.8V (VOUT2, 300mA max) - fixed, non-adjustable outputs optimized for baseband processor I/O and core rail sequencing. |
| Dropout Voltage | 80mV @ 100mA (typical) - enables regulation down to VIN = 2.88V for VOUT2, critical for Li-ion battery discharge down to 2.9V. |
| Output Accuracy | ±1.0% initial, ±2.0% over –40°C to +125°C - ensures reliable logic-level compliance across temperature for microprocessor interfaces. |
| Ground Current | 48µA total quiescent (both LDOs off); 60µA at full load - minimizes standby power loss in always-on subsystems. |
| POR Threshold | 90% of VOUT2 nominal (2.52V) for assertion; 96% (2.688V) for release - provides clean reset signaling during brown-out recovery. |
| Enable Logic | Active-high TTL-compatible (VIH ≥ 1.8V, VIL ≤ 0.6V); zero-current shutdown when EN1/EN2 < 0.4V - supports direct GPIO control without level-shifting. |
| Thermal Protection | Internal thermal shutdown with automatic recovery - prevents damage during sustained overload or high ambient conditions in sealed handheld enclosures. |
Pinout & Package
Package: 10-pin 3mm × 3mm MLF™ (MicroLeadFrame) leadless package with exposed thermal pad (EP = GND), rated for –40°C to +125°C junction temperature and 60°C/W θJA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Common Input Supply | Shared input for both LDOs; must be bypassed with ≥1µF ceramic capacitor close to pin to suppress supply noise and ensure stability. |
| EN1 (Pin 2) | LDO1 Enable Control | Active-high digital input; drives VOUT1 on/off independently; floating state is undefined - requires pull-down or active drive. |
| EN2 (Pin 3) | LDO2 Enable & POR Arm | Enables VOUT2 and arms POR monitoring; POR asserts only when EN2 is high and VOUT2 drops below threshold. |
| CBYP (Pin 4) | Reference Bypass Node | Connects 0.01µF ceramic to GND to reduce reference noise and improve PSRR; optional but recommended for noise-sensitive analog rails. |
| SET (Pin 5) | POR Delay Timing Input | 1µA current source charges external capacitor to 1.25V; delay = C × 1.25V / 1µA (e.g., 0.01µF → 12.5ms); never ground this pin. |
| GND (Pin 6) | Power Ground Reference | Main ground connection; must be tied to exposed pad (EP) and system ground plane for thermal and noise performance. |
| NC (Pin 7) | No Connection | Internally unconnected; leave unpopulated or float - no electrical function. |
| POR (Pin 8) | Open-Drain Reset Output | Active-low signal indicating VOUT2 undervoltage; requires external pull-up (to VIN or VOUT2) to generate valid logic levels. |
| VOUT2 (Pin 9) | High-Current LDO Output | 300mA regulated 2.8V supply; powers core logic or RF sections; output capacitance must be ≥1µF X7R ceramic for stability. |
| VOUT1 (Pin 10) | Low-Current LDO Output | 150mA regulated 3.3V supply; typically used for I/O or peripheral rails; same capacitor requirements as VOUT2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Separate EN1/EN2 control allows staggered power-up sequencing - e.g., enable VOUT2 first for core logic, then VOUT1 for peripherals after POR timeout. |
| Programmable POR delay | Single external capacitor on SET pin sets delay from microseconds to >1 second - eliminates need for discrete RC timers or dedicated reset ICs. |
| µCap ceramic-stable design | Stable with 1µF X7R ceramic output caps (no ESR requirements) - reduces board area, cost, and failure risk vs. tantalum/electrolytic solutions. |
| TTL-compatible enable inputs | Direct interfacing with 1.8V/3.3V GPIOs without level shifters - simplifies host MCU integration and reduces BOM count. |
| Ultra-low quiescent current | 48µA total shutdown current - extends shelf life and standby time in battery-backed devices such as feature phones and IoT sensors. |
Applications
| Cellular Handset Power Management | Wireless Modem Baseband Sequencing |
|---|---|
Use Scenario: Dual-rail power delivery for GSM/UMTS baseband processor requiring 3.3V I/O and 2.8V core supply with synchronized reset. IC Role / Device Role / Timing Role: MIC2212-SMYML-TR provides regulated VIO and VCORE while generating POR signal to hold processor in reset until both rails stabilize. Use Value: Eliminates discrete LDOs + reset IC, reducing component count by ≥3 parts and PCB area by >25mm² in QFN-constrained handset designs. | Use Scenario: Powering LTE modem chipset with strict power-up timing: VCORE must be stable before VIO, and reset must assert only after both are within spec. IC Role / Device Role / Timing Role: MIC2212-SMYML-TR uses EN2 to enable VOUT2 first, then EN1 after POR timeout; POR output feeds modem's nRESET pin. Use Value: Achieves compliant power sequencing without FPGA or CPLD intervention - cuts firmware boot-time dependencies and validation effort. |
| PDA System-on-Chip (SoC) Support | Battery-Powered Industrial Sensor Node |
Use Scenario: Supplying ARM9-based PDA SoC with 3.3V peripheral interface and 2.8V memory interface, plus POR for cold-start reliability. IC Role / Device Role / Timing Role: MIC2212-SMYML-TR delivers both rails simultaneously while POR ensures bootloader execution only after stable VDD. Use Value: Enables single-chip power solution meeting JEDEC JESD84-A44B reset timing requirements (<100ms delay) with <1% voltage tolerance. | Use Scenario: Long-life sensor node powered by Li-SOCl₂ battery, requiring ultra-low sleep current and robust brown-out detection. IC Role / Device Role / Timing Role: MIC2212-SMYML-TR maintains 48µA shutdown current; POR monitors VOUT2 to trigger MCU wake-up reset on battery recovery. Use Value: Extends operational lifetime beyond 10 years in storage mode while ensuring deterministic restart after voltage sag - no external supervisor needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO-with-POR applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79533-EP | Single 3.3V LDO (500mA), no second output or POR; requires external reset IC for sequencing. | Cannot replace MIC2212-SMYML-TR in dual-rail systems without redesign; suitable only if VOUT2 is supplied elsewhere. | Select only when system already provides 2.8V rail and reset functionality separately. |
| MAX8869ETA+ | Dual LDO (300mA/300mA), 3.3V/2.8V fixed, but no integrated POR - relies on external voltage monitor. | Lacks programmable POR delay and open-drain POR output; requires additional components for reset generation. | Choose when board space allows extra SOT-23 supervisor IC and precise delay timing is not required. |
Compared with TPS79533-EP and MAX8869ETA+, the MIC2212-SMYML-TR uniquely integrates dual LDOs, adjustable POR, and ultra-low IQ in one 3×3mm package - delivering higher functional density and lower system-level BOM cost for compact battery-powered designs.
Availability
MIC2212-SMYML-TR is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, PDAs, and battery-powered industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2212-SMYML-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, analog, and mixed-signal ICs before its acquisition by Microchip Technology in 2015. Known for innovation in µCap LDOs and high-efficiency DC/DC converters.
The MIC2212 product line was engineered specifically for space-constrained, battery-operated portable electronics - emphasizing ultra-low quiescent current, ceramic-capacitor compatibility, and integrated power sequencing functions to simplify front-end power design.
FAQ
What is the maximum input voltage rating for the MIC2212-SMYML-TR?
The MIC2212-SMYML-TR has an absolute maximum input voltage rating of 7V, but its specified operating range is 2.25V to 5.5V. Operation above 5.5V risks permanent damage, while operation below 2.25V may prevent regulation - especially for the 2.8V VOUT2 rail which requires VIN ≥ 2.88V at 100mA load due to 80mV dropout. Always verify input source compliance with these limits in the final design.
Can the MIC2212-SMYML-TR be used with Y5V ceramic capacitors on its outputs?
The MIC2212-SMYML-TR is characterized and guaranteed stable with X7R or X5R dielectric ceramic capacitors (≥1µF). Y5V capacitors exhibit up to 60% capacitance loss over temperature and voltage, potentially causing instability or poor transient response. Micrel explicitly recommends against Y5V; if used, the nominal value must be significantly oversized to maintain ≥1µF minimum effective capacitance across the full –40°C to +125°C range.
How is the power-on reset delay time calculated for the MIC2212-SMYML-TR?
The POR delay time for the MIC2212-SMYML-TR is determined by the capacitor connected between SET (Pin 5) and GND: t_delay ≈ C_SET × 1.25V / 1.0µA. For example, a 0.01µF capacitor yields ~12.5ms delay; a 0.1µF capacitor yields ~125ms. The SET pin must never be grounded - doing so disables POR functionality and may damage the internal current source.
Does the MIC2212-SMYML-TR require input and output capacitors on both regulators?
Yes - the MIC2212-SMYML-TR requires a minimum 1µF X7R/X5R ceramic capacitor on VIN (input), 1µF on VOUT1, and 1µF on VOUT2 for stability. Additionally, a 0.01µF ceramic capacitor on CBYP (Pin 4) is recommended to maximize PSRR and minimize output noise. Omitting any of these compromises regulation accuracy, transient response, or noise performance per the datasheet validation.
Is the MIC2212-SMYML-TR pin-compatible with other variants in the MIC2212 family?
Yes - all MIC2212 variants, including MIC2212-SMYML-TR, share identical 10-pin 3mm × 3mm MLF™ pinout and thermal pad layout. Voltage options (e.g., 3.3V/2.8V vs. 1.8V/2.8V) are implemented internally; no PCB changes are needed when substituting within the same package suffix (YML). However, enable logic, POR behavior, and electrical specs remain consistent across all fixed-voltage versions.
MIC2212-SMYML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- 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, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA, 0.42V @ 300mA
- Current - Output:
- 150mA, 300mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 40dB (1KHz ~ 20kHz)
- Control Features:
- Enable, Power On Reset
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2212-SMYML-TR FAQ
1.How can I place an order for MIC2212-SMYML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2212-SMYML-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 MIC2212-SMYML-TR reliable?
The price and inventory of MIC2212-SMYML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2212-SMYML-TR is usually 5 days.
3.What payment methods are accepted for MIC2212-SMYML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2212-SMYML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2212-SMYML-TR?
MIC2212-SMYML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2212-SMYML-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 MIC2212-SMYML-TR?
For technical support, including MIC2212-SMYML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2212-SMYML-TR requirements.
6.How does Aetrix verify that MIC2212-SMYML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2212-SMYML-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 MIC2212-SMYML-TR meets industry standards.
7.What is the process for return or replacement of MIC2212-SMYML-TR?
All MIC2212-SMYML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2212-SMYML-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 MIC2212-SMYML-TR part is unused and in its original packaging.
Return procedure for MIC2212-SMYML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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