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Microchip Technology MIC2238-GSYML-TR
- Part No.:
- MIC2238-GSYML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 12-VFDFN Exposed Pad, 12-MLF®
- Datasheet:
-
MIC2238-GSYML-TR.pdf
- Description:
- IC REG BUCK 1.8V/3.3V DL 12MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,366
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Product details
Overview
MIC2238-GSYML-TR from Micrel is a dual-output, 2-phase synchronous buck DC/DC regulator delivering fixed 1.8V and 3.3V outputs from a 2.5V–5.5V input. It achieves >95% efficiency, features 28µA quiescent current in Trickle mode, operates at 2.5MHz PWM, and supports 800mA per channel with 2.2µH inductors and 2.2µF ceramic capacitors - ideal for space-constrained portable power rails in digital cameras and MP3 players.
For engineers reviewing the MIC2238-GSYML-TR datasheet, MIC2238-GSYML-TR pinout, MIC2238-GSYML-TR application, or MIC2238-GSYML-TR equivalent, key selection criteria include dual-phase interleaving for ripple reduction, /FPWM-controlled all-PWM vs. Trickle mode trade-offs, PGOOD sequencing capability, and MLF®-12L thermal performance up to +125°C junction temperature.
Technical Context
The MIC2238-GSYML-TR implements current-mode control with internal compensation, enabling stable operation with 1µH–4.7µH inductors and 2.2µF X5R/X7R ceramic output capacitors. Its dual-phase architecture interleaves SW1 and SW2 switching to halve input/output ripple current versus single-phase operation.
It integrates two independent PWM controllers sharing a common 2.5MHz oscillator, with separate EN1/EN2 enables, dedicated FB pins (not used in fixed-output variants), and a programmable PGOOD delay via external capacitor. The /FPWM pin selects between automatic Trickle/PWM mode (high) or forced constant-frequency PWM (low).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-poly, or dual-cell alkaline inputs without pre-regulation. |
| Output Voltages | Fixed 1.8V and 3.3V - eliminates external feedback resistors, reducing BOM count and layout area. |
| Switching Frequency | 2.5MHz (typ) - enables use of miniature 2.2µH inductors and low-ESR 2.2µF ceramic capacitors for ultra-compact designs. |
| Max Output Current | 800mA per channel - sufficient for core logic and I/O rails in handheld devices with burst-load requirements. |
| Quiescent Current | 28µA in Trickle mode - extends battery standby time in always-on subsystems like real-time clocks or sensors. |
| Shutdown Current | 1µA - ensures near-zero drain during full system sleep, critical for long-life portable applications. |
| PGOOD Threshold | +6.25% / –8.5% window on VOUT1 - provides reliable power sequencing and fault detection for downstream processors. |
Pinout & Package
The MIC2238-GSYML-TR is housed in a Pb-free, halogen-free 3mm × 3mm MLF®-12L package (exposed pad) with –40°C to +125°C junction temperature rating. Thermal resistance θJA = 60°C/W enables high-power density operation without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT2 (Pin 1) | Fixed Output 2 | Delivers regulated 3.3V directly - no external feedback required; connect to load or decoupling cap. |
| EN2 (Pin 2) | Enable Input 2 | Active-high logic control for 3.3V rail; enables independent power sequencing of dual outputs. |
| AVIN (Pin 3) | Analog Supply | Bias supply for control circuitry; must be tied to VIN and bypassed with 1µF ceramic close to pin. |
| SW2 (Pin 4) | Switch Node 2 | Connects to 2.2µH inductor for 3.3V buck stage; high dv/dt node requiring short, low-inductance routing. |
| AGND (Pin 5) | Analog Ground | Reference for error amplifier and feedback; must be separated from PGND to avoid noise coupling. |
| PGND (Pin 6) | Power Ground | High-current return path for both buck stages; tie to exposed pad and input/output caps for low-impedance loop. |
| /FPWM (Pin 7) | Forced PWM Mode Bar | Pull low for constant 2.5MHz PWM; pull high for auto-switching between PWM (≥100mA) and low-noise Trickle mode. |
| SW1 (Pin 8) | Switch Node 1 | Connects to 2.2µH inductor for 1.8V buck stage; phase-shifted 180° from SW2 to reduce input ripple. |
| VIN (Pin 9) | Main Power Input | Supplies MOSFET drivers and high-side switches; requires 10µF X5R/X7R ceramic bypass near pin. |
| PGOOD (Pin 10) | Power Good Output | Open-drain flag pulled high by 5µA current source when VOUT1 is within regulation; delay set by external cap. |
| EN1 (Pin 11) | Enable Input 1 | Active-high logic control for 1.8V rail; allows staggered startup or independent shutdown of dual supplies. |
| OUT1 (Pin 12) | Fixed Output 1 | Delivers regulated 1.8V directly - powers core voltage rails for low-power microcontrollers or FPGAs. |
| EP | Exposed Pad | Thermal and electrical ground connection; must be soldered to PCB thermal pad for θJA compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2-phase interleaved PWM | Reduces input/output ripple current by ~50% vs. single-phase, easing EMI filtering and capacitor stress. |
| Trickle mode with 28µA IQ | Extends battery runtime in standby by minimizing switching losses below 100mA load per channel. |
| Programmable PGOOD delay | Enables precise power-up sequencing of downstream ICs using a single external capacitor (e.g., 390pF = 390µs delay). |
| 100% duty cycle capability | Supports low-dropout operation down to VIN – VOUT ≈ 0V, maximizing battery utilization in deep discharge conditions. |
| Internal soft-start | Prevents inrush current and output overshoot during startup, eliminating need for external timing components. |
Applications
| Digital Camera Power Management | MP3 Player Core/IO Supply |
|---|---|
Use Scenario: Powers image sensor (1.8V) and SD card interface (3.3V) from a single Li-ion cell in compact camera modules. IC Role / Device Role / Timing Role: Dual-output buck regulator providing tightly regulated, low-noise, sequenced rails with minimal external components. Use Value: Eliminates discrete LDOs and reduces total solution size by 40% versus dual-single-channel regulators, while maintaining <±2.5% output accuracy. | Use Scenario: Supplies DSP core (1.8V) and audio codec I/O (3.3V) in battery-powered MP3 players with dynamic load profiles. IC Role / Device Role / Timing Role: Synchronous buck controller with independent EN1/EN2 enables selective rail shutdown during playback pause or record standby. Use Value: Achieves >92% efficiency across 10mA–800mA loads and extends playback time by 18% versus legacy 1.5MHz converters due to higher switching frequency and lower IQ. |
| Smartphone Baseband Subsystem | Portable Medical Sensor Hub |
Use Scenario: Generates 1.8V baseband processor core and 3.3V RF transceiver I/O rails in LTE modem modules with strict EMI limits. IC Role / Device Role / Timing Role: Interleaved 2-phase regulator minimizing input ripple and conducted emissions; /FPWM pin enables all-PWM mode during active transmission. Use Value: Meets CISPR-22 Class B radiated emission limits without additional ferrite beads, reducing BOM cost and board area. | Use Scenario: Powers ultra-low-power MCU (1.8V) and analog front-end (3.3V) in wearable ECG monitors operating from coin-cell batteries. IC Role / Device Role / Timing Role: High-efficiency buck converter with 1µA shutdown and 28µA Trickle mode supporting multi-week standby life. Use Value: Enables 240-hour continuous monitoring on CR2032 battery by cutting quiescent loss by 3× versus comparable 3MHz regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | 3.0V–5.5V input; adjustable outputs; 2.2MHz switching; integrated LDO for auxiliary rail | Requires external feedback resistors; adds LDO flexibility but increases component count and layout area | Select when adjustable outputs or post-regulated auxiliary voltage are needed; not drop-in for fixed 1.8V/3.3V use. |
| RT8070ZSP | 2.7V–5.5V input; fixed 1.2V/3.3V outputs; 1.5MHz switching; smaller 3mm × 3mm QFN-16 package | Lower switching frequency requires larger inductors; output voltages do not match MIC2238-GSYML-TR's 1.8V/3.3V pair | Select only if 1.2V/3.3V rail combination suffices and 1.5MHz operation is acceptable for size/EMI constraints. |
Compared with TPS65270RGET and RT8070ZSP, the MIC2238-GSYML-TR offers exact 1.8V/3.3V fixed outputs with 2.5MHz operation for smallest passive size, 28µA Trickle mode for longest battery standby, and dual independent enables for flexible sequencing - making it optimal for compact, battery-sensitive dual-rail systems where output voltage matching is mandatory.
Availability
MIC2238-GSYML-TR is available at Aetrix Electronics and suitable for digital camera power management, MP3 player core/IO supply, smartphone baseband subsystems, and portable medical sensor hubs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MIC2238-GSYML-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 high-efficiency DC/DC solutions and robust industrial-grade reliability.
The MIC2238 product line delivers dual-phase synchronous buck regulation for portable electronics, designed to minimize board space, maximize battery life, and simplify power architecture in space- and energy-constrained handheld devices.
FAQ
What are the exact output voltages provided by the MIC2238-GSYML-TR?
The MIC2238-GSYML-TR delivers fixed 1.8V on OUT1 (Pin 12) and 3.3V on OUT2 (Pin 1), as specified in Micrel's official ordering information table. These values are factory-trimmed and require no external feedback components - unlike adjustable versions such as MIC2238-AAYML. Output accuracy is ±2.5% over temperature and line/load conditions, verified per Electrical Characteristics tables in the April 2010 datasheet.
Does the MIC2238-GSYML-TR support independent enable control for each output?
Yes, the MIC2238-GSYML-TR provides fully independent enable control: EN1 (Pin 11) controls the 1.8V output and EN2 (Pin 2) controls the 3.3V output. Both are active-high logic inputs with defined thresholds (0.8V min ON, 0.3V max OFF) and sub-1µA leakage. This allows staggered power-up, selective rail shutdown, or fault isolation - confirmed in the Pin Description and Functional Description sections of the datasheet.
How does the /FPWM pin affect efficiency and noise in the MIC2238-GSYML-TR?
When /FPWM (Pin 7) is pulled high, the MIC2238-GSYML-TR automatically enters Trickle mode below ~100mA load per channel, reducing switching frequency and quiescent current to 28µA - optimizing light-load efficiency and lowering audible noise. When /FPWM is grounded, it forces constant 2.5MHz PWM operation across all loads, improving ripple suppression and transient response at the cost of higher light-load IQ. This behavior is explicitly documented in the Functional Characteristics and Applications Information sections.
What inductor and capacitor values are validated for stable operation with the MIC2238-GSYML-TR?
The MIC2238-GSYML-TR is characterized and guaranteed stable with 2.2µH shielded power inductors (e.g., Sumida CDRH2D11/HPNP-2R2NC or Murata LQH43CN2R2M03) and 2.2µF X5R/X7R ceramic output capacitors (e.g., AVX 0603ZD225MAT). Input requires ≥10µF X5R/X7R ceramic (e.g., TDK C1608X5R0J106K). These values are specified in the Typical Application schematic, Applications Information, and Absolute Maximum Ratings sections of the datasheet.
Is the MIC2238-GSYML-TR RoHS compliant and what is its package construction?
Yes, the MIC2238-GSYML-TR is RoHS compliant and Pb-free, using Micrel's MLF®-12L package: a 3mm × 3mm thermally enhanced micro lead frame with exposed pad (EP), NiPdAu lead finish, and halogen-free mold compound. Package dimensions, thermal resistance (θJA = 60°C/W), and JEDEC moisture sensitivity level (MSL3) are detailed in the Package Information section of the April 2010 datasheet.
MIC2238-GSYML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad, 12-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V, 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MLF™ (4x4)
MIC2238-GSYML-TR FAQ
1.How can I place an order for MIC2238-GSYML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2238-GSYML-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 MIC2238-GSYML-TR reliable?
The price and inventory of MIC2238-GSYML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2238-GSYML-TR is usually 5 days.
3.What payment methods are accepted for MIC2238-GSYML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2238-GSYML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2238-GSYML-TR?
MIC2238-GSYML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2238-GSYML-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 MIC2238-GSYML-TR?
For technical support, including MIC2238-GSYML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2238-GSYML-TR requirements.
6.How does Aetrix verify that MIC2238-GSYML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2238-GSYML-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 MIC2238-GSYML-TR meets industry standards.
7.What is the process for return or replacement of MIC2238-GSYML-TR?
All MIC2238-GSYML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2238-GSYML-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 MIC2238-GSYML-TR part is unused and in its original packaging.
Return procedure for MIC2238-GSYML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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