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Microchip Technology MIC2193YM-TR
- Part No.:
- MIC2193YM-TR
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC2193YM-TR.pdf
- Description:
- IC REG CTRLR BUCK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
MIC2193YM-TR from Micrel is a synchronous buck controller IC designed for high-efficiency DC-DC step-down conversion in space-constrained applications. It operates with 2.9V–14V input, delivers adjustable output via 1.245V reference, uses 400kHz PWM current-mode control, drives external P-channel high-side and N-channel low-side MOSFETs, and supports 100% duty cycle - enabling use in low-headroom battery-powered systems (e.g., 1–2-cell Li-ion).
For engineers reviewing the MIC2193YM-TR datasheet, MIC2193YM-TR pinout, MIC2193YM-TR application, or MIC2193YM-TR equivalent, key selection considerations include its SO-8 package, absence of bootstrap circuitry, 4Ω typical gate drive impedance, frequency foldback short-circuit protection, and compatibility with all-ceramic output capacitor designs.
Technical Context
The MIC2193YM-TR implements BiCMOS current-mode PWM control with internal slope compensation, enabling stable operation above 50% duty cycle. Its dual-loop architecture senses both output voltage (via FB pin regulated to 1.245V) and inductor current (via VIN–CS differential sensing), decoupling control dynamics from inductor L-value.
It integrates a 3V linear regulator (VDD) for internal bias, features front-edge blanking to suppress current-sense noise, and embeds non-overlap timing (50–160ns) between OUTP and OUTN drivers to prevent shoot-through. Frequency foldback activates at FB ≤ 0.3V, reducing oscillator frequency to ~90kHz during overload or short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 14V - supports direct regulation from 3.3V, 5V, 12V rails and 1–2-cell Li-ion batteries (2.7–8.4V). |
| Switching Frequency | 400kHz (±10%) - enables compact magnetics and ceramic output capacitors; no external timing components required. |
| Feedback Reference Voltage | 1.245V (±1%) - sets output voltage via resistor divider; low drift over –40°C to +125°C ensures stable regulation. |
| Max Duty Cycle | 100% - allows dropout operation in low-headroom applications (e.g., 3.3V-in → 3.3V-out with minimal loss). |
| Gate Drive Impedance | 4Ω (source/sink, VIN = 12V) - drives large external MOSFETs; supports high-current POE and server point-of-load designs. |
| Current Limit Threshold | 110mV (VIN–CS) - sets overcurrent trip level; programmable via sense resistor for precise output current limiting. |
| Operating Junction Temp | –40°C to +125°C - qualified for industrial and telecom environments without derating. |
Pinout & Package
Package: 8-lead SOIC (M), 150 mil width, RoHS-compliant (Pb-free) lead finish per ordering code YM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Controller supply & current sense (+) input | Provides gate drive voltage to OUTP/OUTN; also serves as high-side reference for current sensing - requires local 1µF decoupling. |
| COMP (Pin 2) | Error amplifier output | Exposes transconductance amplifier output for loop compensation; connects to RC network for stability across load/transient conditions. |
| FB (Pin 3) | Output voltage feedback input | Regulated to 1.245V; determines output via R1/R2 divider; triggers frequency foldback when ≤0.3V during fault. |
| CS (Pin 4) | Current sense (–) input | Forms differential pair with VIN to detect MOSFET conduction current; highly noise-sensitive - demands tight PCB routing and 10nF bypass. |
| VDD (Pin 5) | Internal 3V regulator output | Supplies bias to internal logic; must be decoupled with 1µF ceramic cap close to pin; UVLO threshold = 2.65V. |
| GND (Pin 6) | Power and signal ground reference | Common return for VDD, CS, FB, COMP; requires low-impedance connection to power ground plane. |
| OUTN (Pin 7) | N-channel MOSFET gate driver | Sinks/sources up to 1A peak; swing = GND to VIN; 6Ω typical on-resistance at 5V VIN enables fast low-side switching. |
| OUTP (Pin 8) | P-channel MOSFET gate driver | Pulls gate low to turn on high-side P-MOSFET; eliminates need for bootstrap capacitor; supports 100% duty cycle operation. |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty cycle capability | Enables ultra-low dropout regulation (e.g., 3.6V-in → 3.3V-out), critical for battery-powered equipment with shrinking voltage margins. |
| Integrated 3V VDD regulator | Eliminates need for external bias supply; provides clean, regulated rail for internal logic and gate drivers - improves noise immunity and startup reliability. |
| Frequency foldback protection | Reduces switching frequency to ~90kHz under short-circuit, limiting average power dissipation and preventing thermal runaway. |
| Front-edge blanking | Suppresses false current-limit triggering caused by switch-node ringing during MOSFET turn-on - enhances robustness in noisy layouts. |
| All-ceramic capacitor support | Stable operation with zero-ESR ceramic output caps due to current-mode control and optimized compensation - reduces board area and cost. |
Applications
| Point-of-Load Power Supply | Distributed Power System |
|---|---|
Use Scenario: Regulating 12V backplane to 3.3V/5A for FPGA I/O banks in telecom line cards. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-side P-MOSFET and low-side N-MOSFET switching at 400kHz. Use Value: 100% duty cycle maintains regulation during brownout; 4Ω drivers ensure fast MOSFET transitions, minimizing conduction losses at 5A. |
Use Scenario: Local 5V-to-1.8V conversion for ASIC cores in modular server blades. IC Role / Device Role / Timing Role: Adjustable-output buck controller implementing current-mode feedback for fast transient response to dynamic core loads. Use Value: 1.245V reference tolerance (±1%) ensures tight output accuracy; frequency foldback prevents damage during hot-swap events. |
| Wireless Modem Power Stage | ADSL Line Card DC-DC |
Use Scenario: Step-down from single-cell Li-ion (3.0–4.2V) to 2.5V/2A for RF transceiver ICs. IC Role / Device Role / Timing Role: High-efficiency buck controller operating across full battery range without external LDO post-regulation. Use Value: 2.9V minimum VIN enables operation down to nearly depleted battery; all-ceramic design reduces solution size for compact modem modules. |
Use Scenario: Generating ±12V and 3.3V rails from 48V telco supply in DSLAM line interface cards. IC Role / Device Role / Timing Role: Primary buck controller for intermediate 12V bus, feeding isolated flyback and LDO stages. Use Value: –40°C to +125°C rating ensures reliability in unventilated DSLAM cabinets; SO-8 package simplifies thermal management vs. larger alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2307DN-LF-Z (Monolithic Power) | Integrated power stage (40V, 3A); fixed 500kHz freq; no 100% duty cycle; requires external bootstrap. | Better for low-component-count, medium-current apps; unsuitable for ultra-low dropout or high-current discrete MOSFET designs. | Select when board space > efficiency flexibility; avoid if 100% duty cycle or external MOSFET control is required. |
| LTC3850IGN#PBF (Analog Devices) | Wide VIN (4–38V); 2-phase capable; 850kHz max; includes PMBus interface; higher BOM cost. | Targeted at high-performance server VRMs; adds telemetry and multi-phase sync not needed in basic PoL. | Choose for advanced monitoring or multi-phase scaling; over-specified for simple single-phase 400kHz buck control. |
Compared with MP2307DN-LF-Z and LTC3850IGN#PBF, the MIC2193YM-TR uniquely balances discrete MOSFET control, 100% duty cycle, and SO-8 integration - making it optimal for cost-sensitive, thermally constrained, or low-headroom industrial and telecom power stages where external FET selection and layout flexibility are priorities.
Availability
MIC2193YM-TR is available at Aetrix Electronics and suitable for point-of-load power supplies, distributed power systems, and wireless modem power stages requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2193YM-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 analog and mixed-signal semiconductor company specializing in power management, timing, and interface solutions before its acquisition by Microchip Technology in 2015.
The MIC2193YM-TR belongs to Micrel's synchronous buck controller product line, engineered for high-efficiency, low-noise DC-DC conversion in space-constrained industrial, telecom, and battery-powered applications - emphasizing simplicity, thermal resilience, and discrete FET flexibility.
FAQ
What is the maximum output current supported by the MIC2193YM-TR?
The MIC2193YM-TR itself does not deliver output current - it controls external MOSFETs. Maximum output current depends on selected P- and N-channel FETs, inductor rating, and thermal design. With appropriately sized components (e.g., Si9803/Si9804 dual MOSFETs), the MIC2193YM-TR has been validated for ≥5A output in reference designs. Gate drive strength (4Ω typical) and 100% duty cycle enable robust high-current operation.
Does the MIC2193YM-TR require an external bootstrap capacitor?
No, the MIC2193YM-TR does not require an external bootstrap capacitor. It drives a high-side P-channel MOSFET via the OUTP pin, which pulls the gate low relative to VIN - eliminating the need for voltage boosting. This architecture directly enables 100% duty cycle operation and simplifies layout compared to N-channel high-side controllers like the MIC2193YM-TR's contemporaries.
What is the purpose of the CS pin on the MIC2193YM-TR?
The CS (Current Sense) pin on the MIC2193YM-TR is the inverting input of the current-sense amplifier. It forms a differential pair with VIN (pin 1) to measure the voltage drop across the external current-sense resistor (RSENSE). This measurement sets the overcurrent limit threshold (typically 110mV) and feeds the inner current-mode control loop - ensuring cycle-by-cycle current limiting and stable PWM regulation.
Can the MIC2193YM-TR operate with all-ceramic output capacitors?
Yes, the MIC2193YM-TR supports all-ceramic output capacitor designs. Its current-mode control architecture, combined with slope compensation and stable error amplifier characteristics, ensures loop stability even with zero-ESR ceramic capacitors. Reference designs confirm stable 1.8V/5A operation using only ceramic output caps - reducing solution size, cost, and aging concerns versus electrolytic alternatives.
What happens when the FB pin voltage drops below 0.3V on the MIC2193YM-TR?
When the FB pin voltage falls to ≤0.3V - indicating severe overload or output short-circuit - the MIC2193YM-TR enters frequency foldback mode. The internal oscillator frequency reduces from 400kHz to approximately 90kHz, lowering average switching losses and limiting power delivery to the faulted load. This protects external MOSFETs and inductors from thermal stress while maintaining controller functionality for recovery.
MIC2193YM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 2.9V ~ 14V
- Frequency - Switching:
- 400kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC2193YM-TR FAQ
1.How can I place an order for MIC2193YM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2193YM-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 MIC2193YM-TR reliable?
The price and inventory of MIC2193YM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2193YM-TR is usually 5 days.
3.What payment methods are accepted for MIC2193YM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2193YM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2193YM-TR?
MIC2193YM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2193YM-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 MIC2193YM-TR?
For technical support, including MIC2193YM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2193YM-TR requirements.
6.How does Aetrix verify that MIC2193YM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2193YM-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 MIC2193YM-TR meets industry standards.
7.What is the process for return or replacement of MIC2193YM-TR?
All MIC2193YM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2193YM-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 MIC2193YM-TR part is unused and in its original packaging.
Return procedure for MIC2193YM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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