XC9220C095MR-G - 16V Step-Down DC/DC Controller, 3A | Torex
N.º de pieza: XC9220C095MR-G ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.18 | $11,80 |
| 100 | $0.84 | $84,00 |
| 500 | $0.61 | $305,00 |
| 1.000 | $0.48 | $480,00 |
XC9220C095MR-G Descripción general
A step-down DC/DC controller (also called a buck regulator controller) is a switch-mode power supply IC that converts a higher DC input voltage to a lower, regulated DC output voltage by rapidly switching an external power transistor and smoothing the resulting chopped waveform through an LC filter. Buck controllers sit within the broader hierarchy of voltage regulator -> DC-DC converter -> power management IC. Compared with linear regulators, buck controllers achieve much higher efficiency (typically 90%+) because the external switch dissipates far less power than a series pass element.
Key features of the XC9220 series include a 1.8V to 16V input voltage range, a 0.9V (±1.5%) precision reference, a 300 kHz internal switching frequency, and built-in soft-start protection. The 'C095' variant configures the feedback divider for a fixed 0.95V output, eliminating external resistors and saving PCB area in single-rail point-of-load designs. The control scheme is fixed-frequency PWM (XC9220 series, as opposed to the XC9221 PWM/PFM family).
From a technical perspective, the IC drives an external P-channel MOSFET, allowing the designer to choose a FET rated for the application's load current and thermal envelope. The 300 kHz switching frequency is a deliberate tradeoff between inductor/capacitor size and switching losses, enabling compact designs without pushing into MHz-range EMI sensitivity. Low-ESR ceramic output capacitors are supported, simplifying the BOM versus tantalum-based alternatives.
Typical applications include single-cell Li-ion powered portable electronics, USB-powered peripherals, HDD/DVD drive supplies, and 12V-bus distributed power in industrial control boards. The 0.95V fixed output makes it especially well suited as a core-voltage rail for low-voltage DSPs, ASICs, or microcontrollers, where a standard 1.0V LDO cannot meet the dropout budget.
When designing with this part, choose the external P-channel MOSFET carefully: its Vds rating must exceed the maximum input voltage plus transient ringing, and its Rds(on) directly sets conduction loss and overall efficiency. Place the Schottky catch diode and input bypass capacitor as close as possible to the SW pin to minimize switching-node parasitic inductance.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond what is available in the manufacturer datasheet, giving engineers a single decision-ready reference for the XC9220C095MR-G.
Alternativas directas para XC9220C095MR-G — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
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XC9220C095MR-G
✅ Sustitución directa✓ En stock
$0.48 / unidad
Ver hoja de datos →XC9221C095MR-G
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
XC9220C095DR-G
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
XC9220C095MR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
XC9220A095MR-G
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
XC9220C095MR-G Valores máximos y características eléctricas
| Topología | Step-Down (Buck) Controller |
| Rango de tensión de entrada | 1.8 V to 16 V |
| Output Voltage (C095 variant) | 0.95 V fixed |
| Tensión de referencia | 0.9 V (±1.5%) |
| Corriente de salida máxima | 3 A (with external P-MOSFET) |
| Frecuencia de conmutación | 300 kHz |
| Control Method | PWM (fixed-frequency) |
| Output Current Method | External P-channel MOSFET driver |
| Rango de temperatura de funcionamiento | -40 C to +85 C |
| Encapsulado | SOT-25-5 (5-pin) |
| Tipo de montaje | Surface Mount |
| External Components Required | 1 P-MOSFET, 1 inductor, 1 Schottky diode, 2 capacitors |
| Output Capacitor Support | Low-ESR ceramic |
| Nivel MSL | 1 (per JEDEC J-STD-020) |
| Estado RoHS | Compliant (-G suffix) |
| Arranque suave | Built-in |
| Series Variant | XC9220 (PWM), XC9221 (PWM/PFM) |
Configuración de pines de XC9220C095MR-G
| Pin 1 | SW — Switch node - drives gate of external P-channel MOSFET and connects to inductor |
| Pin 2 | GND — Ground return for internal circuitry and external MOSFET source |
| Pin 3 | VSENSE — Output voltage sense (internal connection for fixed -C095 variant) |
| Pin 4 | EN — Enable input - active-high to turn regulator on |
| Pin 5 | VIN — Supply input - 1.8V to 16V, connect to input bypass capacitor |
Aplicaciones típicas
XC9220C095MR-G es adecuado para 6 aplicacións: Single-Cell Li-Ion Powered Portable Device Core Rail, USB-Powered Peripheral 5V to 0.95V Buck Supply, HDD / Optical Drive Power Supply, Industrial 12V Bus Distributed Power Node, FPGA / ASIC Core Voltage Point-of-Load, Battery-Operated Sensor Node Power Supply.
Single-Cell Li-Ion Powered Portable Device Core Rail
The XC9220C095MR-G is well suited as a 0.95V point-of-load rail in single-cell Li-ion powered portable devices. Its 1.8V-16V input range comfortably accepts the Li-ion range (3.0V-4.2V) plus margin, while the 3A output capability (via external P-MOSFET) supports modest DSP or sensor-hub loads. The fixed 0.95V output eliminates external feedback resistors, saving PCB area in compact wearables, while the 300 kHz PWM keeps switching noise out of audio bands - a critical advantage for headphone-coupled designs where an LDO would waste 70% of battery energy at 3.7V to 0.95V conversion.
Recomendado
USB-Powered Peripheral 5V to 0.95V Buck Supply
USB bus-powered peripherals such as flash drives, dongles, and small hubs can use the XC9220C095MR-G to step the 5V USB Vbus down to a 0.95V internal rail. The 16V input ceiling provides ample margin against USB-supplied transients and hot-plug ringing. With an external P-MOSFET sized for 0.5-1A continuous load, the design fits on a single-layer PCB while remaining within USB suspend-current budgets. The four-external-component BOM keeps total solution cost low - typically under $0.40 in volume - making this controller attractive for cost-sensitive consumer accessories.
Recomendado
HDD / Optical Drive Power Supply
Hard-disk and DVD/CD optical drives traditionally need a 0.95V analog supply rail for the read-channel preamp or laser diode driver. The XC9220C095MR-G delivers this rail directly from a 5V or 12V motor/actuator supply, eliminating an intermediate LDO stage that would waste significant power. The 3A output capability covers the peak current demands during disk spin-up, while the 300 kHz fixed PWM keeps switching noise outside the sensitive 5-30 MHz read-channel band.
Recomendado
Industrial 12V Bus Distributed Power Node
In 12V industrial-bus distributed-power systems, the XC9220C095MR-G provides a compact local 0.95V supply for sensor ASICs, FPGA auxiliary rails, or interface logic. The wide 1.8V-16V input tolerates the 12V bus with headroom for load-dump transients on 24V-derived supplies, while the external P-MOSFET architecture lets the designer choose a FET with the appropriate Vds rating for the worst-case input surge. The low BOM count simplifies long-term maintenance in industrial installations.
Recomendado
FPGA / ASIC Core Voltage Point-of-Load
Modern FPGAs and ASICs often require sub-1V core voltages that a conventional LDO cannot deliver efficiently from a 3.3V or 5V rail. The XC9220C095MR-G supplies the 0.95V core directly with 90%+ efficiency, dissipating far less heat than an LDO solution. The 5-pin SOT-25 footprint fits on the dense underside of BGA packages, and the 300 kHz PWM avoids interference with common FPGA reference clock frequencies.
Recomendado
Battery-Operated Sensor Node Power Supply
Battery-driven sensor nodes used in IoT and wireless-sensor applications can use the XC9220C095MR-G to convert a 2-3 AA cell stack or a single Li-ion cell into a stable 0.95V supply for low-power wireless MCUs. The 1.8V minimum input supports direct cell-stack operation, and the high PWM efficiency extends battery runtime by 30-50% compared with an LDO approach. The shutdown-friendly standby behavior (when paired with the EN pin) lets the MCU power-cycle the supply for deep-sleep modes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para XC9220C095MR-G — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | XC9221C095MR-G | XC9220C095DR-G | XC9220C095MR | XC9220A095MR-G |
|---|---|---|---|---|---|
| Package | SOT-25-5 | SOT-25-5 - same | SOP-8 - different package but same die | SOT-25-5 - same | SOT-25-5 - same |
| Brand | Torex | Torex | Torex | Torex | Torex |
| Input Voltage Range | 1.8 V to 16 V | 1.8 V to 16 V | 1.8 V to 16 V | 1.8 V to 16 V | 1.8 V to 16 V |
| Fixed Output Voltage | 0.95 V | 0.95 V | 0.95 V | 0.95 V | 0.95 V |
| Switching Frequency | 300 kHz | 300 kHz | 300 kHz | 300 kHz | 1.0 MHz (higher) |
| Control Method | PWM (fixed) | PWM/PFM (automatic at light load) | PWM (fixed) | PWM (fixed) | PWM (fixed) |
| Maximum Output Current | 3 A (with ext P-MOSFET) | 3 A (with ext P-MOSFET) | 3 A (with ext P-MOSFET) | 3 A (with ext P-MOSFET) | 3 A (with ext P-MOSFET) |
| RoHS Compliance | Yes (-G suffix) | Yes (-G suffix) | Yes (-G suffix) | Verify - no -G suffix | Yes (-G suffix) |
Diferenciadores clave
- Only SOT-25-5 fixed 0.95V variant in the XC9220 family (frente a XC9221C095MR-G)
- Compact SOT-25-5 vs larger SOP-8 thermal packages (frente a XC9220C095DR-G)
- Lower switching frequency for inductor flexibility (frente a XC9220A095MR-G)
Notas de diseño
Estimated: at VIN=5V, VOUT=0.95V, IOUT=2A, the external P-MOSFET dissipates approximately (5V - 0.95V) x 2A = 8.1W of switching+conduction loss in the FET itself - but the controller IC only sees the gate-drive loss. Choose a P-channel MOSFET with Vds rating >= 20V (margin above 16V max input plus ringing), Rds(on) <= 50 mΩ at Vgs=4.5V, and a thermally enhanced package (SOP-8 or smaller DFN) when output current exceeds 1.5A. Underestimating the FET thermal budget is the single most common design error with this controller family.
Keep the switching loop (VIN bypass capacitor, external P-MOSFET drain/source, Schottky diode anode) as tight as possible - ideally a 5mm x 5mm loop. The SW pin trace should be short and wide (>= 0.5mm) to minimize parasitic inductance that causes ringing and overshoot. Place the input bypass ceramic capacitor (1uF X7R) within 1mm of the VIN pin and the Schottky catch diode within 2mm of the SW pin to control switching noise.
Estimated: although the controller itself dissipates minimal power (typically < 50mW gate-drive loss), the design's overall thermal envelope is dominated by the external P-MOSFET and Schottky diode. For a 1A continuous load at VIN=5V to VOUT=0.95V, plan for approximately 4W total dissipation shared between the FET and the diode; at 2A load this doubles to 8W. Provide at least 100mm² of 2oz copper on each side of the FET footprint to keep junction temperature below 100C in a 60C ambient environment.
Keep analog ground (controller GND) and power ground (return of input/output capacitors and Schottky diode) connected at a single point near the IC GND pin to avoid ground-loop noise injection into the internal reference. Star-ground topology is preferred over ground-pour for the controller GND pin. Avoid routing sensitive signal traces (feedback, EN) near the SW node.
Información de cumplimiento
RoHS compliance indicated by -G suffix per Torex part-number convention. Not AEC-Q100 qualified; this part is intended for commercial/industrial environments only. Halogen-free and conflict-minerals declarations were not found in the provided source data.
