SP6134 - 600kHz Sync PWM Step-Down Controller | Exar/MaxLinear
N.º de pieza: SP6134 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.21 | $12,10 |
| 100 | $0.95 | $95,00 |
| 500 | $0.78 | $390,00 |
| 1.000 | $0.62 | $620,00 |
| 3.000 | $0.51 | $1.530,00 |
SP6134 Descripción general
A synchronous buck controller is a type of DC-DC switching regulator that uses an external high-side MOSFET and a low-side synchronous rectifier MOSFET (rather than a diode) to achieve high efficiency. Within the broader taxonomy, synchronous controllers belong to the switching regulator family, which in turn is a category of power management ICs used in semiconductor power conversion. By replacing the traditional Schottky rectifier with a low-RDS(on) MOSFET, synchronous designs routinely achieve 90-95% efficiency even at moderate loads, making them the dominant topology for modern POL (point-of-load) applications.
Key features include 600 kHz constant-frequency PWM operation that allows small inductors and ceramic output capacitors, internal low-side driver for the synchronous FET, internal high-side driver with bootstrap supply, and a wideband error amplifier for tight regulation. The device supports both dual-rail and single-rail input configurations, provides an output voltage adjustable down to 0.8 V, and includes a soft-start pin to control inrush current. An adjustable current limit protects the external MOSFETs during overload or output short-circuit events.
The internal architecture uses voltage-mode control with leading-edge blanking on the current-sense input, eliminating the noise-induced false triggering that plagues many older controllers. Its 3 V to 15 V main input range covers the standard 3.3 V, 5 V, 9.6 V, and 12 V rails commonly found in telecom, industrial, and consumer systems. Designed around a wideband internal amplifier, the SP6134 achieves excellent line and load transient response.
Typical applications include ASIC/DSP core voltage regulation, FPGA core and I/O rails, distributed 5 V and 12 V intermediate bus conversion, telecom point-of-load modules, and industrial embedded systems. The 600 kHz switching frequency is well above the AM radio band, allowing the design to meet EN55022 and FCC Part 15 EMI limits with proper PCB layout.
When designing with this device, place the input bypass capacitor, bootstrap capacitor, and current-sense resistor as close to the IC as possible. Choose MOSFETs with low gate charge to minimize switching losses at 600 kHz and verify that thermal dissipation in the MSOP package stays within the 31 C/W theta-JA limit at full rated load. For single-rail applications connect VIN and VCC5 together and limit input to 5 V to 6 V.
This page synthesizes distributor pricing from Mouser/DigiKey cross-references, drop-in alternatives in the same MSOP-10 footprint, and practical design notes not found in the manufacturer datasheet alone, helping engineers evaluate SP6134 against modern pin-compatible controllers.
Alternativas directas para SP6134 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con SP6134 (mismo factor de forma y huella) — difiere en Switching Frequency, UVLO, Topology, Output Current Capability, VCC Range (Controller Bias).
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SP6134H
✅ Sustitución directa✓ En stock
$1.95 / unidad
Ver hoja de datos →SP6132
✅ Sustitución directa✓ En stock
$0.82 / unidad
Ver hoja de datos →SP6132H
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SP6137
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SP6139
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SP6134 Valores máximos y características eléctricas
| Topología | Synchronous Buck (Step-Down) Controller |
| Control Method | Voltage Mode PWM |
| Frecuencia de conmutación | 600 kHz (constant) |
| Input Voltage Range (Main Supply VIN) | 3 V to 15 V |
| Controller Supply (VCC5) | 4.5 V to 5.5 V |
| Output Voltage Adjustment Range | 0.8 V to VIN (external divider) |
| Output Current Capability | 2 A to 15 A (with external MOSFETs) |
| Reference Voltage (Internal) | 0.8 V |
| Duty Cycle Range | 0% to 100% |
| Arranque suave | External capacitor programmable |
| Limitación de corriente | Adjustable via external sense resistor |
| High-Side Gate Driver | Internal, with bootstrap supply |
| Low-Side Gate Driver | Internal synchronous rectifier driver |
| UVLO | Internal undervoltage lockout detects both rails |
| Encapsulado | 10-pin MSOP |
| Tipo de montaje | Surface Mount |
| Rango de temperatura de funcionamiento | -40C to +125C (industrial) |
| RoHS Compliance | RoHS compliant (lead-free SP6134EU-L variant) |
Guía de configuración de pines de SP6134 10-pin msop
Configuración de pines para SP6134 (encapsulado 10-pin msop). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para SP6134.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SP6134 es adecuado para 6 aplicacións: ASIC/DSP Core Voltage Regulation, FPGA Core and I/O Power Rails, Distributed 5V and 12V Intermediate Bus Conversion, Telecom Point-of-Load Modules, Industrial Embedded Systems and Test Equipment, Portable and Battery-Powered Devices.
ASIC/DSP Core Voltage Regulation
The SP6134 delivers adjustable output down to 0.8 V with high efficiency, making it ideal for ASIC and DSP core supplies. Its 600 kHz switching frequency is well above the AM broadcast band, and the synchronous buck topology achieves 92-95% efficiency at typical 1-3 A loads. With internal high-side and low-side MOSFET drivers, the controller drives external FETs to deliver 2-15 A core current. Its 3-15 V input range accepts standard 5 V and 12 V intermediate bus voltages common in telecom and industrial embedded designs.
Recomendado
FPGA Core and I/O Power Rails
The SP6134's adjustable output down to 0.8 V and 600 kHz constant-frequency operation suits FPGA core and I/O voltage requirements. Modern FPGAs such as Xilinx 7-series and Intel Cyclone families require 0.85 V, 1.0 V, 1.2 V, 1.8 V, 2.5 V, and 3.3 V rails - all within the SP6134's output adjustment range. The internal soft-start and adjustable current limit protect the FPGA during inrush and short-circuit events. The MSOP-10 footprint saves board space in compact FPGA modules such as PCIe cards and embedded vision systems.
Recomendado
Distributed 5V and 12V Intermediate Bus Conversion
Distributed intermediate bus architectures in telecom and server backplanes use 5 V or 12 V primary rails that are stepped down locally to supply ASICs, FPGAs, and high-speed SERDES. The SP6134 accepts both 5 V and 12 V inputs on its main VIN supply and can operate from a single 5 V rail by tying VIN to VCC5. Its 600 kHz switching frequency enables small ceramic output capacitors and compact inductors, while efficiency remains above 90% at 12 V-to-3.3 V conversion. The internal UVLO monitors both supply rails for safe startup sequencing.
Recomendado
Telecom Point-of-Load Modules
Telecom point-of-load modules require high efficiency from compact form factors; the SP6134 satisfies both with its MSOP-10 package and synchronous buck topology. The 600 kHz switching frequency stays above the AM radio band, helping designers meet EN55022 Class B EMI limits for telecom equipment. The wide input voltage range (3-15 V) covers the legacy -48 V brick-converted 12 V intermediate bus as well as directly-regulated 5 V rails. Designers use the SP6134 to generate 1.0 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V POL rails from these buses.
Recomendado
Industrial Embedded Systems and Test Equipment
Industrial embedded systems, programmable logic controllers, and bench test equipment rely on stable low-voltage rails for microcontrollers, ADCs, and signal conditioning circuits. The SP6134 provides the adjustable 0.8 V to 5 V outputs these designs need from standard 12 V or 24 V (post-preregulator) input rails. Its industrial -40C to +125C operating range suits harsh-environment deployments. The internal soft-start prevents inrush current that could disturb upstream protection circuits, and the adjustable current limit protects against load faults common in field-deployed equipment.
Recomendado
Portable and Battery-Powered Devices
Although the SP6134's 600 kHz switching frequency is fixed, its wide input voltage range and high efficiency make it practical for battery-powered designs where multi-cell Li-ion or 12 V SLA batteries feed core regulators. The synchronous MOSFET driver minimizes diode losses, extending battery runtime relative to non-synchronous buck controllers. Its MSOP-10 footprint integrates cleanly into handheld instrument designs. Designers must evaluate standby current during light-load conditions; for ultra-low quiescent applications, consider Microchip MCP16301 or TI TPS5430 family alternatives.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SP6134 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SP6134H | SP6132 | SP6132H | SP6137 | SP6139 |
|---|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Package | 10-pin MSOP | 10-pin MSOP - same | 10-pin MSOP - same | 10-pin MSOP - same | 10-pin MSOP - same | 10-pin MSOP - same |
| Min Output Voltage | 0.8 V | 0.8 V | 0.8 V (typical) | 0.8 V (typical) | 0.8 V (typical) | 0.8 V (typical) |
| Output Current Capability | 2 A to 15 A (external FETs) | 2 A to 15 A (external FETs) | 2 A to 15 A (external FETs) | 2 A to 15 A (external FETs) | 2 A to 15 A (external FETs) | 2 A to 15 A (external FETs) |
| Topology | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck |
| RoHS Compliance | Yes (lead-free EU-L) | Yes | Yes | Yes | Yes | Yes |
Diferenciadores clave
- Dual-supply input design separates controller power from main rail (frente a SP6134H)
- Lower switching frequency enables simpler EMI compliance (frente a SP6134H (1300 kHz))
- Wide-input 15V operation targets industrial 12V rails (frente a SP6132 family)
Notas de diseño
Place the input bypass capacitor on VIN (typically 10 uF ceramic) and the VCC5 decoupling capacitor (4.7 uF ceramic) within 5 mm of their respective pins. The bootstrap capacitor between BOOT and UGATE should use a 0.1 uF to 1 uF ceramic with short traces. The current-sense resistor must connect between the inductor node and SENSE pin with the smallest possible loop area to avoid noise-induced false triggering. All power traces should be sized for at least 1 oz copper to minimize DC losses; the GND return should use a flooded ground plane on the top layer tied to the IC's thermal pad and exposed GND pin.
The 10-pin MSOP package has a theta-JA of approximately 31 C/W when reflow-soldered to a 1-oz copper pad of approximately 1 square inch. Estimated: at 600 kHz switching frequency with light gate charge FETs, the controller itself dissipates roughly 300-500 mW, yielding a junction temperature rise of only 9-16 C above ambient - well within the 125 C limit. However, most heat is generated in the external MOSFETs and inductor, so focus thermal design on those components. Use pulse-rated inductors and low-RDS(on) FETs with thermally enhanced packages such as SO-8 or DFN.
Do not connect VIN and VCC5 together when VIN exceeds 6 V - the internal 5 V controller supply has limited input range and will overheat. For single-rail 5 V applications, short VIN to VCC5 directly. Avoid running the controller with no load (0 A) on the output, as the synchronous FET may skip pulses and cause audible noise; add a minimum preload resistor of approximately 100 ohms if the load can truly go to zero. The SS/EN pin doubles as enable - tying it to VCC5 through a 100 kohm resistor with a 0.1 uF cap provides proper soft-start ramp.
Use a 4-layer PCB stack-up with a dedicated ground plane directly under the power components. Route the FB (feedback) trace away from the UGATE and LGATE switching nodes to avoid noise injection into the error amplifier; route it as a differential pair with GND alongside if possible. Place the compensation network (R/C from COMP to FB) within 5 mm of the COMP pin. Use short, wide traces between UGATE, BOOT, and the high-side FET gate to minimize parasitic inductance that causes gate ringing and EMI.
Información de cumplimiento
SP6134EU-L suffix variant is lead-free, RoHS compliant per LCSC and Mouser listings; consult MaxLinear product pages for full material declaration.
