My Inquiry
My Account
Microchip Technology MIC2159YMME-TR
- Part No.:
- MIC2159YMME-TR
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC2159YMME-TR.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,729
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2159YMME-TR from Micrel is a voltage-mode synchronous buck controller IC designed for high-current point-of-load DC/DC conversion. It operates at 400 kHz, supports 3V–14.5V input, delivers adjustable output down to 0.8 V, and drives dual N-channel MOSFETs to support up to 30 A load in telecom and server power supplies.
For engineers reviewing the MIC2159YMME-TR datasheet, MIC2159YMME-TR pinout, MIC2159YMME-TR application, or MIC2159YMME-TR equivalent, key selection criteria include its 10-pin ePAD MSOP package, 0.8 V feedback reference, 30 ns minimum on-time, hiccup-mode short-circuit protection, and external compensation architecture for stable high-power regulation.
Technical Context
The MIC2159YMME-TR implements voltage-mode PWM control with an internal transconductance error amplifier, 1 V sawtooth oscillator, and dual gate drivers optimized for all-N-channel synchronous rectification. Its current sensing uses high-side MOSFET RDS(ON)-eliminating external sense resistors-while maintaining ±1% feedback reference accuracy over temperature.
It integrates soft-start via the COMP/EN pin (8.5 µA current source), dual hysteretic comparators for fast transient recovery (±3% VFB window), and adaptive non-overlap timing (~50 ns) between HSD and LSD outputs to prevent shoot-through. The internal 5 V VDD LDO powers gate drivers and bias circuitry, with dropout operation below 5 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 14.5 V - supports wide-range industrial and telecom inputs without pre-regulation |
| Output Voltage Range | Adjustable from 0.8 V - enables precise core voltage regulation for modern processors and FPGAs |
| Switching Frequency | 400 kHz (±12.5%) - balances component size, EMI, and efficiency for mid-power designs |
| Feedback Reference | 0.8 V ±1% - sets output via external resistor divider; low tolerance minimizes output drift across load/temperature |
| Min On-Time | 30 ns - enables high step-down ratios (e.g., 12 V → 0.8 V at ~7% duty cycle) without pulse-skipping |
| Driver Output Impedance | 2.5 Ω (source/sink @ 4.5 V) - ensures fast MOSFET turn-on/off with <15 ns rise/fall into 3000 pF |
| Shutdown Current | 50 µA typical - enables ultra-low quiescent power during system standby or fault latch-off |
Pinout & Package
Package: 10-pin ePAD MSOP (MME) with exposed thermal pad - provides low θJA of 63°C/W for continuous 30 A operation at TJ ≤ +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Supplies controller core and gate drivers; accepts 3–14.5 V with 15.5 V absolute max rating |
| VDD | Internal LDO output / gate drive rail | 5 V ±0.3 V regulated supply for logic and drivers; must be tied to VIN if input ≤5 V |
| CS | Current sense input | Non-inverting comparator input for RDS(ON)-based overcurrent detection; threshold set by internal 200 µA sink |
| COMP/EN | Compensation node & enable input | External RC network sets loop stability; pulled below 0.2 V to enter 50 µA shutdown mode |
| FB | Feedback input | Connects to resistor divider; regulates output by holding voltage at 0.8 V reference |
| GND | Analog/digital ground return | Common reference for error amp, CS, FB, and driver sinks; requires low-impedance connection to thermal pad |
| LSD | Low-side MOSFET gate driver | High-current output (2.5 Ω sink/source) driving external N-FET source to GND |
| VSW | Switch node return | Return path for high-side driver; connects to switch node between high/low FETs and inductor |
| HSD | High-side MOSFET gate driver | Bootstrap-driven output enabling N-FET high-side switching; includes adaptive dead-time control |
| BST | Bootstrap capacitor input | Connects to CBST; generates gate drive voltage > VSW by VIN minus diode drop for high-side FET turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables predictable loop compensation using standard Type II/III networks without current-loop instability risks |
| All-N-channel synchronous architecture | Eliminates external P-FET or Schottky freewheeling diode; reduces conduction loss and board area |
| RDS(ON)-based current sensing | Removes need for power-wasting sense resistor; simplifies layout while supporting hiccup-mode fault recovery |
| Dual-function COMP/EN pin | Combines soft-start ramp, loop compensation, and shutdown control in one pin-reducing external component count |
| Hiccup-mode short-circuit protection | Automatically cycles soft-start on hard shorts, limiting average power dissipation and preventing thermal runaway |
| Integrated 5 V VDD LDO | Provides stable gate drive rail independent of input variation; supports logic-level FETs above 5 V and sub-logic FETs below 5 V |
Applications
| Telecom Power Supply | Server VRM |
|---|---|
Use Scenario: Intermediate bus conversion in 48 V telecom systems delivering 3.3 V/12 V to line cards and baseband processors. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-efficiency, high-current POL conversion with fast transient response to burst traffic loads. Use Value: 400 kHz switching and 30 ns min-on-time enable compact magnetics; hiccup protection sustains uptime during card hot-swap faults. | Use Scenario: Core voltage regulation for multi-core CPUs and GPUs in rack-mounted servers requiring dynamic VOUT scaling. IC Role / Device Role / Timing Role: Adjustable-output controller driving paralleled N-FETs to deliver up to 30 A at 0.8–1.8 V with tight ±1% regulation. Use Value: 0.8 V ±1% reference and external compensation ensure stable regulation under rapid load steps; ePAD MSOP aids thermal management in dense layouts. |
| Graphics Card Power | Industrial PLC I/O Module |
Use Scenario: GPU core and memory rail regulation in discrete graphics cards where space and thermal density are constrained. IC Role / Device Role / Timing Role: High-current synchronous controller operating from 12 V input to generate sub-1 V GPU core voltages with minimal ripple. Use Value: 30 ns min-on-time supports deep step-down ratios; built-in soft-start prevents inrush damage during PCIe hot-plug events. | Use Scenario: Field-programmable logic controller modules requiring robust 5 V or 3.3 V rails from unregulated 12–24 V industrial supplies. IC Role / Device Role / Timing Role: Industrial-grade buck controller delivering stable output across –40°C to +125°C junction range with overvoltage/overcurrent fault handling. Use Value: Wide input range (3–14.5 V), extended temp rating, and hiccup-mode protection ensure reliability in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Current-mode control; wider 6–100 V input; no integrated VDD LDO; requires external bootstrap diode | Better suited for high-input-voltage industrial or automotive applications; lacks RDS(ON) sensing | Select when input exceeds 14.5 V or current-mode loop stability is preferred over voltage-mode simplicity |
| TPS40200DGQ | Voltage-mode like MIC2159 but fixed 300 kHz; lower 4.5–28 V input; no hiccup mode; 1.23 V reference | Targeted at cost-sensitive mid-power applications; less precise output setting and narrower temp range (–40°C to +85°C) | Choose for simpler designs where 0.8 V reference and extended temperature are not required |
Compared with LM5116PWPR and TPS40200DGQ, the MIC2159YMME-TR uniquely combines 0.8 V reference accuracy, RDS(ON) current sensing, hiccup-mode protection, and integrated 5 V VDD in a thermally enhanced 10-pin ePAD MSOP-making it optimal for space-constrained, high-reliability 30 A POL designs.
Availability
MIC2159YMME-TR is available at Aetrix Electronics and suitable for telecom/datacom power supplies, server VRMs, graphics card voltage regulation, and industrial PLC I/O modules requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MIC2159YMME-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 founded in 1978 and acquired by Microchip Technology in 2015. It specialized in power management, timing, and interface ICs.
The MIC2159YMME-TR belongs to Micrel's high-efficiency synchronous buck controller product line, engineered specifically for high-current, high-density point-of-load DC/DC conversion in telecom infrastructure, enterprise computing, and graphics subsystems.
FAQ
What is the function of the COMP/EN pin on the MIC2159YMME-TR?
The COMP/EN pin on the MIC2159YMME-TR serves three integrated functions: (1) external compensation network connection for loop stability, (2) soft-start control via internal 8.5 µA current source charging the compensation capacitor, and (3) enable/shutdown input-pulling it below 0.2 V places MIC2159YMME-TR in 50 µA quiescent shutdown mode. This multi-function design reduces external component count while preserving full control over startup behavior and regulation dynamics.
Does the MIC2159YMME-TR require an external Schottky diode?
The MIC2159YMME-TR does not require an external Schottky diode for basic operation-the low-side MOSFET's body diode provides freewheeling path. However, adding an external Schottky diode improves efficiency by 0.5–1% and reduces high-frequency noise, as it avoids the body diode's slow reverse recovery and higher forward voltage. MIC2159YMME-TR's gate drivers are fully compatible with either configuration, and the datasheet explicitly recommends the external diode for optimal performance in high-frequency, high-efficiency designs.
How does the MIC2159YMME-TR implement current limiting without a sense resistor?
The MIC2159YMME-TR implements current limiting by sensing voltage across the high-side MOSFET's RDS(ON) during its on-time via the CS pin. An internal 200 µA current sink sets the trip threshold, allowing calculation of the current limit using RCS = (ILOAD × RDS(ON)) / 200 µA. This eliminates the power loss and board area of a discrete sense resistor. During overload, MIC2159YMME-TR enters hiccup mode-discharging COMP, resetting soft-start, and cycling until fault clears-providing robust protection without external circuitry.
What is the minimum recommended output voltage for the MIC2159YMME-TR?
The MIC2159YMME-TR supports an adjustable output voltage down to 0.8 V, set by the feedback resistor divider connected to the FB pin. This 0.8 V reference is accurate to ±1% at 25°C and ±2% over the full –40°C to +125°C junction temperature range. The 30 ns minimum on-time enables stable regulation even at very low duty cycles (e.g., 0.8 V from 12 V input), making MIC2159YMME-TR suitable for modern low-voltage processor and FPGA core rails where precision and headroom are critical.
Can the MIC2159YMME-TR operate with input voltage below 5 V?
Yes, the MIC2159YMME-TR operates with input voltage as low as 3 V. When VIN < 5 V, its internal VDD LDO operates in dropout mode (~200 mV dropout), delivering ~VIN − 0.2 V to gate drivers. To ensure reliable MOSFET turn-on, sub-logic-level N-FETs rated for full enhancement at VGS = 2.5 V are required. The datasheet recommends shorting VDD to VIN through a 5 Ω resistor in this condition. MIC2159YMME-TR maintains full functionality-including 400 kHz switching, 0.8 V reference, and hiccup protection-across the entire 3–14.5 V input range.
MIC2159YMME-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SYNCHRONOUS-itty™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 14.5V
- Frequency - Switching:
- 400kHz
- Duty Cycle (Max):
- 92%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
MIC2159YMME-TR FAQ
1.How can I place an order for MIC2159YMME-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2159YMME-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 MIC2159YMME-TR reliable?
The price and inventory of MIC2159YMME-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2159YMME-TR is usually 5 days.
3.What payment methods are accepted for MIC2159YMME-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2159YMME-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2159YMME-TR?
MIC2159YMME-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2159YMME-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 MIC2159YMME-TR?
For technical support, including MIC2159YMME-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2159YMME-TR requirements.
6.How does Aetrix verify that MIC2159YMME-TR is sourced from the original manufacturer or authorized distributors?
All MIC2159YMME-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 MIC2159YMME-TR meets industry standards.
7.What is the process for return or replacement of MIC2159YMME-TR?
All MIC2159YMME-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2159YMME-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 MIC2159YMME-TR part is unused and in its original packaging.
Return procedure for MIC2159YMME-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2159YMME-TR Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
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…
