SP6134 - 600kHz Sync PWM Step-Down Controller | Exar/MaxLinear
料号： SP6134 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： SP6134 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SP6134 （相同外形与封装尺寸） ——差异在于 Switching Frequency, UVLO, Topology, Output Current Capability, VCC Range (Controller Bias).
快速对比工具——选择替代料号进行并排对比：
SP6134H
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →SP6132
✅ 直接替换✓ 有现货
$0.82 / 个
查看数据手册 →SP6132H
✅ 直接替换📋 参考替代料（不在目录中）
SP6137
✅ 直接替换📋 参考替代料（不在目录中）
SP6139
✅ 直接替换📋 参考替代料（不在目录中）
SP6134 最大额定值与电气特性
| 拓扑 | Synchronous Buck (Step-Down) Controller |
| Control Method | Voltage Mode PWM |
| 开关频率 | 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% |
| 软启动 | External capacitor programmable |
| 限流 | 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 |
| 封装 | 10-pin MSOP |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +125C (industrial) |
| RoHS Compliance | RoHS compliant (lead-free SP6134EU-L variant) |
SP6134 10-pin msop 引脚配置指南
SP6134（10-pin msop 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： SP6134.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP6134 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： SP6134 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Dual-supply input design separates controller power from main rail （对比 SP6134H)
- Lower switching frequency enables simpler EMI compliance （对比 SP6134H (1300 kHz))
- Wide-input 15V operation targets industrial 12V rails （对比 SP6132 family)
设计说明
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.
合规信息
SP6134EU-L suffix variant is lead-free, RoHS compliant per LCSC and Mouser listings; consult MaxLinear product pages for full material declaration.
