My Inquiry
My Account
Microchip Technology MIC4742YTSE-TR
- Part No.:
- MIC4742YTSE-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MIC4742YTSE-TR.pdf
- Description:
- IC REG BUCK ADJ 2A DL 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC4742YTSE-TR from Micrel is a dual-channel, 2 MHz synchronous-capable (non-synchronous with external diode) buck regulator IC delivering two independent 2A DC outputs. It operates from 2.9V to 5.5V input, supports adjustable output down to 0.6V per channel, achieves >92% peak efficiency, and features integrated P-channel MOSFETs with 155 mΩ typical RDS(on). It is used in FPGA/ASIC core voltage regulation and point-of-load conversion in broadband modems and automotive satellite radios.
For engineers reviewing the MIC4742YTSE-TR datasheet, MIC4742YTSE-TR pinout, MIC4742YTSE-TR application, or MIC4742YTSE-TR equivalent, key selection criteria include dual 2A output capability at 2 MHz switching frequency, 100% duty cycle support for low-dropout operation, thermal shutdown and current limit protection, and compatibility with 1 µH inductors and 4.7 µF ceramic output capacitors.
Technical Context
The MIC4742YTSE-TR implements a dual PWM buck architecture with independent enable (EN1/EN2) and feedback (FB1/FB2) control per channel, enabling flexible power sequencing and output voltage adjustment. Its proprietary internal Type III voltage-mode compensation delivers >200 kHz closed-loop bandwidth without external compensation components.
Each channel integrates a high-side P-channel MOSFET switch (SW1/SW2), supports non-synchronous operation with an external Schottky diode, and uses separate VIN1/VIN2 and PGND1/PGND2 paths with internal anti-parallel diodes for robust current routing. The BIAS pin supplies internal reference circuitry via a dedicated 10 Ω resistor and 0.1 µF bypass capacitor to SGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 5.5 V - Enables direct use with 3.3 V and 5 V system rails without pre-regulation. |
| Switching Frequency | 2 MHz (±0.3 MHz) - Allows ultra-small 1 µH inductors and compact 4.7 µF ceramic output capacitors. |
| Output Current per Channel | 2 A continuous - Supports high-current digital loads including FPGA I/O banks and ASIC cores. |
| Feedback Reference Voltage | 0.6 V ±2% - Sets precise output voltage via external resistor divider; enables 0.6 V to 5.5 V adjustable range. |
| Max Duty Cycle | 100% - Permits operation with minimal input-to-output differential (e.g., 3.3 VIN → 3.3 VOUT). |
| RDS(on) (High-Side P-MOSFET) | 155 mΩ typical at VIN = 3.6 V - Reduces conduction loss and improves efficiency above 92% at full load. |
| Junction Temperature Range | –40°C to +125°C - Qualified for automotive infotainment and industrial embedded environments. |
| Thermal Resistance (θJA) | 35°C/W (EPAD TSSOP-16) - Enables high-power dissipation with minimal heatsinking when EPAD is soldered to PCB ground plane. |
Pinout & Package
The MIC4742YTSE-TR is housed in a 16-pin Exposed Pad TSSOP (EPAD TSSOP-16) package measuring 5 mm × 4.4 mm × 1.2 mm, with the exposed thermal pad (EPAD) electrically and thermally connected to GND. This package provides superior thermal performance (θJA = 35°C/W) versus MLF alternatives and supports automated optical inspection (AOI) and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Logic-level enable inputs | Active-high control: driving either pin low shuts down its respective channel, reducing quiescent current to <10 µA. |
| FB1 / FB2 | Feedback inputs | Connect to resistor divider from output to set regulated voltage; internal 0.6 V reference enables precision adjustment. |
| VIN1 / VIN2 | Power supply inputs | Dual independent inputs (2 pins each) for channel-specific decoupling; internally linked via anti-parallel diodes for redundancy. |
| SW1 / SW2 | Switch node outputs | Direct connection to external inductor and freewheeling Schottky diode cathode; high dV/dt nodes requiring tight layout. |
| PGND1 / PGND2 | Power ground returns | Separate high-current return paths for each channel's MOSFET drive; internally diode-connected to minimize ground bounce. |
| SGND | Signal ground reference | Analog reference for error amplifier and bias circuitry; must be isolated from PGND to avoid noise coupling. |
| BIAS | Bias supply terminal | Internally powered via 10 Ω resistor from VIN; requires 0.1 µF ceramic cap to SGND for clean reference generation. |
| EPAD | Exposed thermal pad | Must be soldered to solid PCB ground plane for thermal dissipation and EMI reduction; electrically tied to GND. |
Key Features
| Feature | Design Value |
|---|---|
| 2 MHz fixed-frequency PWM | Enables use of 1 µH inductors and 4.7 µF ceramic output capacitors - reduces board area by >40% vs. 500 kHz designs. |
| Integrated 2A P-channel MOSFETs | Eliminates need for external high-side switches and current-sense resistors - simplifies BOM and improves reliability. |
| 100% duty cycle operation | Supports low-dropout conditions (e.g., 3.3 VIN → 3.3 VOUT) without dropout or regulation loss - critical for rail-to-rail systems. |
| Ultra-fast transient response | 200+ kHz closed-loop bandwidth ensures <50 mV output deviation under 2 A step load changes - stabilizes FPGA core voltages. |
| Thermal shutdown & current limit | Protects against overtemperature (>153°C) and overload (2.5–4.3 A per channel) - prevents latch-up and field failures. |
| Micro-power shutdown mode | Reduces total supply current to <10 µA when both EN1 and EN2 are low - extends battery life in standby applications. |
Applications
| FPGA Core Power Supply | Automotive Satellite Radio |
|---|---|
|
Use Scenario: Providing tightly regulated 1.2 V and 1.8 V supplies to Xilinx Spartan-6 FPGA banks with dynamic current demand up to 2 A per rail. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering independent, sequenced, and ripple-controlled DC outputs for logic and I/O domains. Use Value: Achieves >92% efficiency at full load while maintaining <1% load regulation - minimizes thermal stress and eliminates need for heatsinks. |
Use Scenario: Generating 3.3 V and 5.0 V rails in compact automotive satellite radio head units operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Dual PoL regulator managing power for RF front-end, DSP, and display interface subsystems with independent enable control. Use Value: 100% duty cycle and wide temperature rating ensure stable operation during cold cranking (low VIN) and engine bay heat exposure. |
| xDSL Modem Power Management | HD Set-Top Box SoC Supply |
|
Use Scenario: Delivering 1.0 V and 1.2 V to ADSL2+ line card processors and analog front-ends in space-constrained residential gateways. IC Role / Device Role / Timing Role: High-frequency dual buck converter minimizing EMI and enabling small form factor design with no external compensation. Use Value: 2 MHz operation allows use of 0805-size 1 µH inductors and avoids audible noise - critical for consumer-grade modems. |
Use Scenario: Supplying 1.1 V core and 1.8 V memory rails to Broadcom BCM7xxx SoCs in HD STBs with strict ripple and transient requirements. IC Role / Device Role / Timing Role: Dual adjustable buck regulator supporting dynamic voltage scaling and independent power gating per domain. Use Value: Adjustable 0.6 V reference and 0.2% load regulation ensure SoC compliance with JEDEC DDR3/LPDDR2 voltage tolerances. |
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 |
|---|---|---|---|
| MP2492D-LF-Z | 2.2 MHz, dual 2A, integrated high-/low-side MOSFETs, synchronous rectification, 0.6 V reference | Higher integration eliminates external diode but increases complexity for light-load optimization | Preferred where synchronous efficiency >94% at light loads is required; not drop-in due to different pinout and control logic. |
| TPS54290PWPR | 2.2 MHz, dual 2A, external high-/low-side FET drivers, 0.8 V reference, adjustable soft-start | Requires external MOSFETs and compensation network - higher BOM count but greater flexibility | Chosen when design requires programmable frequency, phase interleaving, or custom loop tuning; not pin-compatible. |
Compared with MIC4742YTSE-TR, MP2492D-LF-Z offers higher light-load efficiency via synchronous operation but lacks 100% duty cycle; TPS54290PWPR provides full control over power stage selection and loop dynamics but demands additional layout and tuning effort.
Availability
MIC4742YTSE-TR is available at Aetrix Electronics and suitable for FPGA/ASIC power delivery, automotive infotainment systems, and broadband communication equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC4742YTSE-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. It emphasized high-efficiency, high-frequency DC-DC solutions for space- and thermal-constrained applications.
The MIC4742YTSE-TR belongs to Micrel's high-density dual buck regulator product line, designed specifically for point-of-load conversion in digital systems where board space, thermal performance, and fast transient response are critical - such as FPGA, ASIC, and multimedia SoC platforms.
FAQ
What is the maximum output voltage achievable with MIC4742YTSE-TR?
The MIC4742YTSE-TR supports adjustable output voltage down to 0.6 V using an external resistor divider on FB1 or FB2. With standard 1% resistors and proper layout, outputs up to 5.5 V are achievable - limited only by the input voltage range (2.9 V to 5.5 V) and stability constraints of the LC filter. The device does not regulate above VIN; maximum practical output equals VIN minus diode drop in non-synchronous configuration.
Does MIC4742YTSE-TR require external compensation components?
No, the MIC4742YTSE-TR uses proprietary internal Type III voltage-mode compensation optimized for 1 µH inductors and 4.7 µF ceramic output capacitors. No external compensation network is needed - simplifying design and improving repeatability. However, a feedforward capacitor across the upper feedback resistor is recommended to enhance phase margin and transient response, especially at higher output voltages.
Can MIC4742YTSE-TR operate with only one channel enabled?
Yes, MIC4742YTSE-TR supports independent channel control: EN1 enables/disables channel 1 (SW1, FB1, VIN1, PGND1), and EN2 controls channel 2 (SW2, FB2, VIN2, PGND2). Either channel may be disabled while the other remains fully operational - allowing flexible power sequencing, partial-system sleep modes, and fault isolation without affecting the active rail.
What thermal pad soldering guidelines apply to MIC4742YTSE-TR?
The EPAD on MIC4742YTSE-TR must be soldered to a solid copper ground plane using a standard 9×9 array of 0.25 mm diameter thermal vias (minimum 6 vias recommended). IPC-7095-compliant stencil design with 50–60% aperture ratio ensures reliable void-free solder joints. Inadequate EPAD connection raises junction temperature by >25°C and risks thermal shutdown under 2 A load.
Is MIC4742YTSE-TR RoHS compliant and halogen-free?
Yes, MIC4742YTSE-TR is RoHS-compliant and halogen-free per IEC 61249-2-21. The EPAD TSSOP-16 package uses NiPdAu lead finish and halogen-free mold compound. Certificate of Compliance (CoC) and material declarations are available through Microchip's product change notification (PCN) archives, as Micrel's product lines were fully integrated into Microchip's quality and environmental systems post-acquisition.
MIC4742YTSE-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- 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):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MIC4742YTSE-TR FAQ
1.How can I place an order for MIC4742YTSE-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4742YTSE-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 MIC4742YTSE-TR reliable?
The price and inventory of MIC4742YTSE-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4742YTSE-TR is usually 5 days.
3.What payment methods are accepted for MIC4742YTSE-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4742YTSE-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4742YTSE-TR?
MIC4742YTSE-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4742YTSE-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 MIC4742YTSE-TR?
For technical support, including MIC4742YTSE-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4742YTSE-TR requirements.
6.How does Aetrix verify that MIC4742YTSE-TR is sourced from the original manufacturer or authorized distributors?
All MIC4742YTSE-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 MIC4742YTSE-TR meets industry standards.
7.What is the process for return or replacement of MIC4742YTSE-TR?
All MIC4742YTSE-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC4742YTSE-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 MIC4742YTSE-TR part is unused and in its original packaging.
Return procedure for MIC4742YTSE-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4742YTSE-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
