MIC23303YML-T5 - 3A 4MHz HyperLight Load Sync Buck | Microchip
N.º da peça: MIC23303YML-T5 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.05 | $30,50 |
| 100 | $2.61 | $261,00 |
| 500 | $2.18 | $1.090,00 |
| 1.000 | $1.84 | $1.840,00 |
MIC23303YML-T5 Visão geral
A buck regulator (also called a step-down switching converter) is a power management IC that efficiently converts a higher DC input voltage to a lower DC output voltage using high-frequency switching of an internal MOSFET pair, an external inductor, and an output capacitor. Within the broader taxonomy it sits under switching regulators -> DC-DC converters -> voltage regulators -> power management ICs -> semiconductors. Compared to linear regulators (LDOs), synchronous buck regulators such as the MIC23303YML-T5 achieve 80-95% efficiency across a wide load range because they recycle energy through the low-side MOSFET instead of dissipating it as heat.
Key specifications include the 4MHz nominal PWM switching frequency (enabling 1uH-class inductors and sub-20mm^2 total solution footprint), 25uA typical quiescent current for battery savings, internal 65mohm high-side / 45mohm low-side MOSFETs, and a Power Good open-drain output that flags output regulation to a host microcontroller or sequencer. HyperLight Load mode dynamically shifts to PFM-style operation at light loads to maintain efficiency below 100uA loads.
Architecturally, the MIC23303YML-T5 integrates both power MOSFETs and compensation inside the package, so only an inductor, input/output ceramic capacitors, and feedback resistors are required externally. The fixed-frequency PWM core combined with internal current-mode compensation provides stable operation across the full 0.65V-3.6V output range and across the -40C to +125C junction temperature window.
Typical applications include powering 1.0V/1.2V/1.8V microcontroller and SoC core rails in space-constrained portable devices, providing secondary rails on FPGA/ASIC carrier boards, USB-powered handheld instruments, battery-backed IoT sensor hubs, and low-voltage DDR memory termination supplies. The 3A capability and 0.65V minimum output cover the bulk of sub-3.3V digital load points.
When designing with this part, prioritize input capacitor placement directly at the PVIN/PGND pins to minimize switching-node ringing, and respect the 1A/ms PVIN slew-rate limit during hot-plug events. The exposed pad must be soldered to a continuous ground plane to meet the 45C/W thermal resistance; without it, output current derates substantially above 1.5A.
This page synthesizes distributor pricing as of 2026-10-09, parametrically-verified drop-in alternatives, and practical layout notes not found in the standalone manufacturer datasheet.
Alternativas drop-in para MIC23303YML-T5 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MIC23303YML-T5 (mesmo formato e footprint) — diferindo em Package, Maximum Output Current, Enable Pin, Input Voltage Range, Line Regulation.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MIC23303YML-TR
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MIC23302YML-TR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC23303YML
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MIC23304YML
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MIC28511-2YFL-T5
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC23303YML-T5 Classificações máximas e características elétricas
| Topologia | Synchronous Buck (Step-Down) |
| Faixa de tensão de entrada | 2.7 V to 5.5 V |
| Faixa de tensão de saída | 0.65 V to 3.6 V (adjustable) |
| Corrente máxima de saída | 3 A |
| Frequência de comutação | 4 MHz (nominal) |
| Corrente de repouso | 25 uA (typical, HyperLight Load mode) |
| High-Side MOSFET RDS(on) | 65 mohm (typical) |
| Low-Side MOSFET RDS(on) | 45 mohm (typical) |
| Efficiency at 1A (5V to 1.8V) | Up to 93% (typical) |
| Soft-start | Programmable via external capacitor |
| Saída Power Good | Open-drain, active-high indication |
| Temperatura de junção de operação | -40 C to +125 C |
| Thermal Resistance (theta JA) | 45 C/W (with exposed pad soldered) |
| Encapsulamento | 12-pin VDFN (3 mm x 3 mm) with Exposed Pad |
| Tipo de montagem | Surface Mount |
| Nível MSL | 1 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
Configuração de pinos do MIC23303YML-T5
| Pino 1 | PVIN — Power input supply for high-side MOSFET |
| Pino 2 | PGND — Power ground for low-side MOSFET |
| Pino 3 | SW — Switch node - connect to external inductor |
| Pino 4 | SW — Switch node (parallel pin for current carrying) |
| Pino 5 | PGND — Power ground (parallel pin) |
| Pino 6 | AGND — Analog ground reference for FB and control |
| Pino 7 | FB — Feedback voltage input - set VOUT via resistor divider |
| Pino 8 | SS — Soft-start programming pin (external capacitor) |
| Pino 9 | COMP — Compensation node - internal compensation, leave open |
| Pino 10 | EN — Enable input (active-high, logic-level compatible) |
| Pino 11 | PG — Power Good open-drain output indicator |
| Pino 12 | PVIN — Power input supply (parallel pin) |
Aplicações típicas
MIC23303YML-T5 é adequado para 6 aplicaçãos: FPGA / SoC Core Voltage Rail, Portable / Battery-Powered IoT Device, USB-Powered Handheld Test Instrument, DDR Memory Termination Supply (VTT), Point-of-Load on FPGA Carrier Board, Industrial Sensor Module / 4-20mA Transmitter.
FPGA / SoC Core Voltage Rail
The MIC23303YML-T5 is well matched to FPGA core rails in the 0.9V-1.2V range at up to 3A continuous load. The 4MHz switching frequency permits a 1uH inductor and sub-25mm^2 total solution footprint, which is essential on dense FPGA carrier boards where the power stage must fit beneath the BGA. HyperLight Load mode holds the regulator stable through the bursty load transients of FPGA logic switching, while the open-drain Power Good output can be wired directly to the FPGA's VCCINT_OK input to enforce proper sequenced startup. Compared to an LDO at 5V-to-1.0V/3A, the buck topology dissipates ~1.5W instead of ~12W.
Recomendado
Portable / Battery-Powered IoT Device
Battery-powered IoT sensor hubs benefit from the MIC23303YML-T5's 25uA quiescent current and HyperLight Load mode, which maintain above 80% efficiency at loads as low as 1mA - critical for devices that spend 99% of their duty cycle in sleep mode. The 2.7V-5.5V input range accepts the full discharge curve of a single-cell Li-ion or LiFePO4 pack without a front-end boost, and the 12-VDFN 3x3mm exposed-pad package fits inside wearable form factors. Programmable soft-start via an external capacitor prevents inrush current that would otherwise sag the battery and cause spurious MCU resets during wake events.
Recomendado
USB-Powered Handheld Test Instrument
USB-powered test instruments drawing up to 3A from a 5V VBUS rail map cleanly to the MIC23303YML-T5's input range, eliminating the need for an upstream boost converter. The Power Good output indicator can drive a status LED or feed back to a microcontroller for inrush sequencing, while the 4MHz switching frequency pushes ripple well above the 100kHz-1MHz band where most handheld-instrument op-amp stages are most sensitive. Programmable soft-start prevents USB host brownouts when the device is hot-plugged into a port-limited source. The exposed pad maintains full 3A output without an external heatsink on a standard 4-layer PCB.
Recomendado
DDR Memory Termination Supply (VTT)
DDR3L and LPDDR4 memory subsystems require a half-VDDQ tracking supply (VTT) capable of sourcing and sinking pulsed current at 1-2A peaks. The MIC23303YML-T5's 0.65V minimum output voltage range supports VTT generation when paired with an external sink/source buffer or a tracking reference network. The 4MHz switching frequency is far above the DDR clock fundamental, so output ripple stays out of the memory-bandwidth-sensitive spectrum. Power Good flags rail stability before the memory controller initiates training sequences. For full bidirectional VTT capability, pair the buck with a Microchip MIC59P60 sink/source driver.
Recomendado
Point-of-Load on FPGA Carrier Board
FPGA carrier boards typically stack multiple voltage rails (1.0V core, 1.8V auxiliary, 2.5V clock, 3.3V IO) generated from a single 5V or 12V system rail, and the MIC23303YML-T5 fits naturally as a 3A point-of-load converter for the lower-voltage rails. The 12-VDFN 3x3mm footprint is small enough to place the regulator directly beneath the FPGA BGA fanout, minimizing copper losses and radiated EMI. HyperLight Load mode prevents audible noise during programming/configuration activities when the FPGA draws only milliamps from the regulator. The exposed pad allows the regulator to share the FPGA's thermal copper pour.
Recomendado
Industrial Sensor Module / 4-20mA Transmitter
Industrial 4-20mA loop-powered sensor modules and 24V-powered transmitter heads can use the MIC23303YML-T5 to derive the local 3.3V MCU rail from a front-end buck or directly from a regulated 5V sub-rail. The 2.7V-5.5V input range and 25uA quiescent current make the device appropriate for low-duty-cycle sensors that spend long intervals in measurement-only states. Programmable soft-start prevents the inrush that could trip the loop's compliance limit on cold start. Power Good can signal an external supervisor for fault-logging before the MCU boots. The 45C/W theta_JA supports operation in sealed enclosures without active airflow up to ~2A.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MIC23303YML-T5 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MIC23303YML-TR | MIC23302YML-TR | MIC23303YML | MIC23304YML | MIC28511-2YFL-T5 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 12-VDFN (3x3 mm) Exposed Pad | 12-VDFN (3x3 mm) - same | 12-VDFN (3x3 mm) - same | 12-VDFN (3x3 mm) - same | 12-VDFN (3x3 mm) - same | 12-VDFN (3x3 mm) - same |
| Input Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Output Voltage Range | 0.65 V to 3.6 V | 0.65 V to 3.6 V | 0.65 V to 3.6 V | 0.65 V to 3.6 V | 0.65 V to 3.6 V | 0.8 V to 3.6 V |
| Maximum Output Current | 3 A | 3 A | 2 A | 3 A | 3 A | 2 A |
| Switching Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 2 MHz |
| Quiescent Current | 25 uA | 25 uA | 25 uA | 25 uA | 25 uA | 35 uA |
| Light-Load Mode | HyperLight Load (PFM skip) | HyperLight Load | HyperLight Load | HyperLight Load | HyperLight Load | Hyper Speed Control |
| Power Good Output | Yes (open-drain) | Yes | Yes | Yes | Yes | Yes |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Principais diferenciais
- Higher switching frequency enables smaller external components (vs MIC28511-2YFL-T5)
- Higher output current capability (vs MIC23302YML-TR)
- HyperLight Load mode for high efficiency at sub-100mA loads (vs MIC28511-2YFL-T5)
Notas de projeto
Place the input ceramic capacitor (22uF X5R 6.3V minimum, lower ESR preferred) within 1mm of the PVIN pins (1 and 12) and the PGND pin (2) to minimize the high-frequency switching loop. The MIC23303's 4MHz edge rate creates a di/dt loop of approximately 4A/ns at full load, and any stray inductance between PVIN and the input cap will ring the SW node beyond the 6V absolute maximum. Place a 0.1uF X7R bypass cap directly on PVIN for high-frequency decoupling; route PGND and AGND back to a single star point under the exposed pad.
Estimated: at VIN=5V, VOUT=1.8V, IOUT=3A, the converter dissipates approximately 0.95W (assuming 90% efficiency). With theta_JA of 45 C/W on a 4-layer JEDEC test board and exposed pad soldered, junction temperature rises ~43C above ambient, supporting full 3A output at 85C ambient with no airflow. Without the exposed pad soldered (e.g. hand-rework prototype), theta_JA jumps above 100 C/W and the part must be derated to 1A at 70C ambient. Always flood copper beneath the exposed pad with at least 8 thermal vias (0.3mm drill) to the inner ground plane.
Do not leave the EN pin floating - either tie it to PVIN through a 100kohm pull-up or drive it from a logic source. A floating EN pin can drift into the indeterminate 0.4V-1.2V region and cause intermittent startup. Do not omit the SS capacitor (recommend 10nF for ~1ms soft-start); without it, the regulator relies on its internal default soft-start which can source excessive inrush current into a discharged load capacitor. The feedback resistor divider should use 1% tolerance resistors with the high-side resistor no larger than 100kohm to keep the FB pin bias current error below 0.5%.
Route the FB trace away from the SW node and inductor to avoid noise coupling into the feedback path. Keep the FB trace short (under 5mm) and surround it with an AGND ground keepout. Place the feedback resistor divider directly at the FB pin (pin 7) with the ground side tied to the AGND pin (pin 6), NOT to PGND. This prevents ground bounce from the high-current return path from corrupting the feedback voltage. The PG pin (pin 11) pull-up resistor should be tied to either VOUT or a logic rail no higher than 5.5V.
The 4MHz fundamental switching frequency and its harmonics can couple into nearby analog or RF signal paths if the input capacitor loop is not properly minimized. Add a small ferrite bead (600 ohm at 100MHz, 0805 size) in series with PVIN for systems that must meet FCC/CE Class B radiated emissions. Place the bead close to the input capacitor, not at the connector, so the high-frequency noise is filtered before it reaches the input source. The exposed pad ground connection acts as a natural shield for the SW node; do not route traces beneath the inductor.
Informações de conformidade
RoHS compliant per Microchip product page; MSL-1 per JEDEC J-STD-020; not AEC-Q100 qualified - contact Microchip for automotive-grade equivalent
