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Microchip Technology MIC23159YML-TR
- Part No.:
- MIC23159YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-VFQFN Exposed Pad, 20-MLF®
- Datasheet:
-
MIC23159YML-TR.pdf
- Description:
- IC REG BUCK ADJ 2A DL 20MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,667
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Product details
Overview
MIC23159YML-TR from Microchip Technology is a dual-channel, 2A synchronous buck regulator with HyperLight Load® operation, adjustable output voltage down to 1.0V, 3 MHz PWM switching, and integrated 225Ω output discharge circuitry. It delivers up to 94% peak efficiency, features independent soft-start and power-good indicators, and targets space-constrained portable power rails in SSDs and mobile processors.
For engineers reviewing the MIC23159YML-TR datasheet, MIC23159YML-TR pinout, MIC23159YML-TR application, or MIC23159YML-TR equivalent, key selection criteria include its dual 2A output capability, 3 mm × 4 mm QFN-20 package, 45 µA quiescent current, HyperLight Load mode for ultra-fast transients at light loads, and verified output pre-bias safety and auto-discharge functionality.
Technical Context
The MIC23159YML-TR implements a proprietary HyperLight Load® control architecture combining fixed minimum-on/off-time pulses with synchronous PMOS/NMOS switching to maintain high efficiency across 1 mA–2 A load range. Its dual independent channels operate with separate enable, soft-start, feedback, and sense inputs-enabling asymmetric rail sequencing and independent regulation.
Each channel integrates low-RDS(ON) MOSFETs (0.20 Ω PMOS / 0.19 Ω NMOS), supports 0.47 µH inductors and 2.2 µF output capacitors, and includes internal 0.62 V reference, undervoltage lockout (2.55 V typ), and thermal shutdown (160°C). The MIC23159 variant adds an active 225 Ω pull-down on SNS pins during disable to discharge output caps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - Supports single-cell Li-ion, USB, and 3.3 V/5 V system rails without external LDO pre-regulation. |
| Output Current per Channel | 2 A continuous - Enables direct powering of core logic, memory I/O, and RF subsystems in portable devices. |
| Switching Frequency | 3 MHz - Allows use of sub-1 µH inductors and compact ceramic capacitors, reducing solution footprint and height <1 mm. |
| Quiescent Current | 45 µA - Minimizes battery drain in always-on standby modes for SSDs and mobile applications. |
| Peak Efficiency | 94% - Achieved in CCM at mid-load; enables thermally constrained designs without heatsinking. |
| Output Discharge Resistance | 225 Ω - Integrated pull-down on SNS pins ensures rapid, controlled output capacitor discharge during shutdown (MIC23159-specific). |
| Operating Junction Temp | –40°C to +125°C - Qualified for automotive infotainment, industrial SSDs, and extended-temperature portable electronics. |
Pinout & Package
Package: 20-pin 3 mm × 4 mm QFN (ML) with exposed thermal pad (ePAD), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Power input for Channel 1 and 2 | Accepts 2.7–5.5 V; requires local 2.2 µF+ ceramic bypass to PGND for EMI suppression and transient response. |
| SW1, SW2 | Switch node outputs | Connects directly to inductor; high dv/dt node requiring tight layout and separation from analog traces. |
| SNS1, SNS2 | Output voltage sense inputs | High-accuracy remote sensing point; also serves as discharge path via 225 Ω internal resistor when EN = low (MIC23159 only). |
| FB1, FB2 | Feedback inputs | Reference comparator input (0.62 V typ); sets output voltage via resistor divider (e.g., 301 kΩ/158 kΩ for 1.8 V). |
| EN1, EN2 | Independent enable inputs | Logic-compatible (0.4 V low / 1.2 V high); controls channel startup sequence and power-state isolation. |
| PG1, PG2 | Open-drain power-good indicators | Assert high when output is within ±7% of target; requires external pull-up to respective VOUT for system monitoring. |
| SS1, SS2 | Soft-start timing inputs | Capacitor-based ramp control (e.g., 470 pF → ~300 µs rise time); prevents inrush current and overshoot. |
| AVIN1, AVIN2 | Analog supply inputs | Must be tied to corresponding VIN; powers control circuitry-requires dedicated 1 µF decoupling for noise immunity. |
| AGND1, AGND2 | Analog ground returns | Separate low-noise return path for FB/SS/AVIN; must connect to central star ground near CIN/COUT. |
| PGND1, PGND2 | Power ground returns | High-current return for switch nodes; routed separately from AGND to minimize coupling into control loop. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 2A buck regulators | Enables simultaneous, sequenced, or isolated power delivery to two processor domains or memory banks without external controllers. |
| HyperLight Load® architecture | Maintains 83% efficiency at 1 mA while delivering ultra-fast load transient response (<10 µs recovery) for burst-mode processors. |
| Integrated 225 Ω output discharge | Eliminates need for external discharge FETs or resistors-reducing BOM count and ensuring safe, predictable shutdown in MIC23159. |
| Output pre-bias safe operation | Allows startup into pre-charged output rails without reverse current or latch-up-critical for hot-swap and multi-rail sequencing. |
| 3 MHz constant-frequency PWM | Enables predictable EMI filtering and small passive component selection; operates in CCM above ~180 mA per channel. |
Applications
| Solid State Drives (SSD) | Smartphones |
|---|---|
Use Scenario: Powering NAND flash I/O and controller core rails in M.2/U.2 SSD modules with strict height and thermal constraints. IC Role / Device Role / Timing Role: Dual-output DC/DC converter supplying 1.2 V core and 1.8 V I/O from shared 3.3 V or 5 V bus. Use Value: 94% peak efficiency and 45 µA quiescent current extend battery-backed write-cache endurance; HyperLight Load maintains regulation during idle bursts. | Use Scenario: Generating camera sensor, display interface, and modem voltage rails in slim smartphone PCBs. IC Role / Device Role / Timing Role: Primary dual-buck regulator delivering 1.8 V and 2.8 V from battery or USB PD input. Use Value: 3 mm × 4 mm QFN-20 package saves >30% board area vs. discrete solutions; independent EN/SS allows precise power-up sequencing per subsystem. |
| Tablet PCs | WiFi/WiMax Applications |
Use Scenario: Supplying application processor cores and GPU voltage domains in fanless tablet designs. IC Role / Device Role / Timing Role: High-efficiency dual buck providing dynamic voltage scaling (DVS) for ARM Cortex-A series SoCs. Use Value: Ultra-fast transient response (<10 µs) prevents brownout during CPU frequency jumps; thermal shutdown protects against sustained 125°C junction conditions. | Use Scenario: Powering 802.11ac/ax RF front-end ICs and baseband processors in portable hotspot modules. IC Role / Device Role / Timing Role: Dual-channel regulator delivering clean 1.1 V core and 3.3 V PA bias from single Li-ion cell. Use Value: Output pre-bias safety prevents backfeed during RF module hot-plug; 225 Ω discharge ensures fast reset between WiFi channel hops. |
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 |
|---|---|---|---|
| TPS65217CIRSLR | Single 3A + dual 1.8A outputs; integrates PMIC functions (LDOs, battery charger, RTC); larger 32-pin QFN package. | Targeted at full-featured tablet PMIC systems-not optimized for minimal dual-buck footprint or ultra-low IQ. | Select if system requires integrated battery management or multiple LDO rails; avoid if only dual 2A buck is needed. |
| RTQ2132B-QT | 2.5A dual buck; 2.5 MHz switching; 25 µA IQ; no integrated discharge; automotive AEC-Q100 Grade 2 qualified. | Designed for automotive infotainment and ADAS; lacks MIC23159's 225 Ω discharge and HyperLight Load light-load optimization. | Select for automotive temperature/certification requirements; MIC23159 preferred for consumer portables needing discharge and lowest IQ. |
Compared with TPS65217CIRSLR and RTQ2132B-QT, the MIC23159YML-TR offers the smallest dual-2A solution footprint (3×4 mm), lowest quiescent current (45 µA), and unique integrated output discharge-making it optimal for space- and battery-life-critical portable SSDs and smartphones where minimal external components and fast shutdown are essential.
Availability
MIC23159YML-TR is available at Aetrix Electronics and suitable for solid state drives (SSD), smartphones, and tablet PCs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC23159YML-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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog, FPGA, and power management ICs, with emphasis on reliability, longevity, and embedded system integration.
The MIC23159YML-TR belongs to Microchip's HyperLight Load® dual buck regulator product line, engineered specifically for high-efficiency, ultra-compact power delivery in battery-powered portable electronics and storage devices.
FAQ
What is the key functional difference between MIC23159YML-TR and MIC23158YML-TR?
The MIC23159YML-TR integrates a 225 Ω internal pull-down resistor on each SNS pin that activates during shutdown to discharge output capacitors-a feature absent in the MIC23158YML-TR. Both share identical electrical specs, pinout, and HyperLight Load operation, but only MIC23159YML-TR provides this auto-discharge capability for faster system reset and safer hot-swap behavior.
Does MIC23159YML-TR support output voltages below 1.0 V?
No. The MIC23159YML-TR is specified for adjustable output voltages from 1.0 V to 3.3 V, based on its internal 0.62 V feedback reference and resistor-divider configuration. Attempting to set outputs below 1.0 V violates the device's operating specifications and may result in regulation failure or instability.
Can MIC23159YML-TR operate with a 0.47 µH inductor?
Yes. The MIC23159YML-TR is explicitly designed to support inductors as low as 0.47 µH, enabling faster transient response and smaller magnetic components. Using 0.47 µH improves load-step recovery time but increases peak inductor current-ensure selected inductor has sufficient saturation current rating (≥3.5 A typical).
Is MIC23159YML-TR compatible with pre-biased output capacitors during startup?
Yes. The MIC23159YML-TR is output pre-bias safe: it prevents reverse current flow and avoids latch-up when powered into an already charged output rail. This is confirmed in the datasheet General Description and enables reliable operation in multi-rail systems with staggered power sequencing.
What is the maximum recommended PCB copper area for the ePAD on MIC23159YML-TR?
The exposed thermal pad (ePAD) on MIC23159YML-TR must be soldered to a solid PGND plane with ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) connecting to inner or bottom-layer ground planes. Microchip recommends a minimum 3 mm × 4 mm copper area under the package; larger areas improve thermal resistance but do not replace proper via implementation.
MIC23159YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 20-VFQFN Exposed Pad, 20-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 2A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-MLF® (3x4)
MIC23159YML-TR FAQ
1.How can I place an order for MIC23159YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23159YML-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 MIC23159YML-TR reliable?
The price and inventory of MIC23159YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23159YML-TR is usually 5 days.
3.What payment methods are accepted for MIC23159YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23159YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23159YML-TR?
MIC23159YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23159YML-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 MIC23159YML-TR?
For technical support, including MIC23159YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23159YML-TR requirements.
6.How does Aetrix verify that MIC23159YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC23159YML-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 MIC23159YML-TR meets industry standards.
7.What is the process for return or replacement of MIC23159YML-TR?
All MIC23159YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23159YML-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 MIC23159YML-TR part is unused and in its original packaging.
Return procedure for MIC23159YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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