SP6132 - Wide Input 300kHz Synchronous PWM Controller | Sipex
N.º da peça: SP6132 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.38 | $138,00 |
| 500 | $1.15 | $575,00 |
| 1.000 | $0.98 | $980,00 |
| 3.000 | $0.82 | $2.460,00 |
SP6132 Visão geral
A switching controller (also called a buck controller or PWM controller) is a power-management IC that regulates a DC output voltage by pulse-width modulating an external high-side/low-side MOSFET pair at a fixed switching frequency. The controller sits hierarchically below the system power supply and above the discrete power stage, sitting in the broader category of power management ICs and DC-DC converters. Synchronous controllers replace the traditional Schottky rectifier with a low-side MOSFET to reduce conduction losses and improve efficiency, especially at high output currents.
Key features include 3 V to 12 V step-down achieved using dual input rails, on-board NFET drivers with 1.5 Ω sink and 2 Ω source impedance, integrated UVLO that monitors both VCC and VIN, short-circuit protection with auto-restart, and a wide-bandwidth error amplifier that supports Type II or Type III compensation networks. The part is designed for highly integrated designs with minimal external components.
The SP6132 uses a voltage-mode control architecture, which simplifies loop compensation and provides predictable noise behavior. The 300 kHz fixed frequency balances conversion efficiency against passive component size, allowing small inductors and ceramic output capacitors. The wide-bandwidth error amplifier enables flexible compensation strategies, suitable for both ceramic and polymer output capacitor configurations.
Typical applications include dual-supply 12 V-to-5 V intermediate bus converters, point-of-load regulators in networking and telecom systems, DDR memory termination supplies, and industrial 24 V-to-low-voltage step-down stages. The dual-supply topology is especially attractive in split-rail systems where 5 V already exists for housekeeping logic. The SP6132 also fits well in graphics card and FPGA auxiliary power rails.
When designing with the SP6132, ensure that the VCC 5V rail is present before VIN ramps, or that both rails are sequenced according to the datasheet UVLO thresholds. Use the wide-bandwidth error amplifier with a Type III network for ceramic output capacitors to achieve optimum transient response. Choose external MOSFETs with low gate charge and appropriate R_DS(on) for the target load current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. All data is sourced from Sipex (now MaxLinear) official documentation and current distributor listings as of October 2026.
Alternativas drop-in para SP6132 — 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 SP6132 (mesmo formato e footprint) — diferindo em Switching Frequency, UVLO, Topology, Output Current Capability, VCC Range (Controller Bias).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
SP6132H
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SP6132HCU-L/TR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SP6132ACU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SP6132 Classificações máximas e características elétricas
| Topologia | Synchronous Buck (Step-Down) Controller |
| Control Method | Voltage Mode PWM |
| Frequência de comutação | 300 kHz (fixed) |
| VIN Range (Power Stage) | 3 V to 12 V |
| VCC Range (Controller Bias) | 5 V typical (dual-supply design) |
| Output Current Capability | Up to 30 A (with external NFETs) |
| NFET Driver - Sink Impedance | 1.5 ohm |
| NFET Driver - Source Impedance | 2 ohm |
| External MOSFET Type | N-Channel (dual, high-side + low-side) |
| Error Amplifier | Wide bandwidth, supports Type II or III compensation |
| UVLO | Monitors both VCC and VIN |
| Short-Circuit Protection | Yes, with auto-restart |
| Encapsulamento | 10-pin MSOP |
| Tipo de montagem | Surface Mount |
| Manufacturer | Sipex Corporation (now part of MaxLinear) |
Configuração de pinos do SP6132
| Pino 1 | BOOT — Bootstrap supply for high-side gate driver |
| Pino 2 | UGATE — High-side gate driver output |
| Pino 3 | GND — Ground |
| Pino 4 | LGATE — Low-side gate driver output |
| Pino 5 | VCC — Controller bias supply (5 V typical) |
| Pino 6 | VIN — Power stage input voltage (3 V to 12 V) |
| Pino 7 | FB — Feedback input from output voltage |
| Pino 8 | COMP — Error amplifier compensation output |
| Pino 9 | SS/TRK — Soft-start / tracking input |
| Pino 10 | PGND — Power ground |
Aplicações típicas
SP6132 é adequado para 6 aplicaçãos: Dual-Supply 12V-to-5V Intermediate Bus Converter, Point-of-Load (POL) Regulator for Networking/Telecom Systems, DDR Memory Termination Supply (VTT), Industrial 12V-to-Low-Voltage Step-Down, FPGA/ASIC Auxiliary Power Rail, Graphics Card and High-Current GPU Power Stage.
Dual-Supply 12V-to-5V Intermediate Bus Converter
The SP6132's dual-supply topology with 3-12V on VIN and 5V on VCC makes it ideally suited for intermediate bus conversion in split-rail systems. The 300 kHz fixed frequency allows small inductors and ceramic output capacitors, while the 1.5/2 Ω driver impedance enables efficient switching of the external NFET pair at moderate to high loads. Power dissipation in the controller IC is minimized because VCC at 5V powers the logic rather than the high-current VIN rail, improving overall system efficiency.
Recomendado
Point-of-Load (POL) Regulator for Networking/Telecom Systems
Networking and telecom boards typically require multiple low-voltage rails (3.3V, 2.5V, 1.8V, 1.2V) derived from a 12V intermediate bus. The SP6132 supports up to 30A output with external NFETs, suiting high-current POL applications. Its voltage-mode control simplifies compensation, and the wide-bandwidth error amplifier accommodates both ceramic and polymer output capacitor configurations. UVLO on both VCC and VIN protects downstream ASICs during power-up transients.
Recomendado
DDR Memory Termination Supply (VTT)
DDR memory requires a VTT termination supply that tracks VDDQ/2 with high accuracy and the ability to sink/source transient spikes. The SP6132's synchronous topology and wide-bandwidth error amplifier enable fast transient response for VTT tracking. The 300 kHz switching frequency is high enough to keep inductors small while staying below AM radio band EMI concerns in server chassis.
Recomendado
Industrial 12V-to-Low-Voltage Step-Down
Industrial control systems often run from a 24V or 12V backplane and need isolated or non-isolated low-voltage rails for logic, sensors, and communication ICs. The SP6132 in the 3-12V VIN range covers the lower-voltage industrial cases directly, while its integrated short-circuit protection with auto-restart improves field reliability. The 10-pin MSOP footprint suits compact DIN-rail mounted PLC modules where board space is at a premium.
Recomendado
FPGA/ASIC Auxiliary Power Rail
FPGAs and high-performance processors often require auxiliary rails (1.0V, 1.2V, 1.8V) in addition to the main core supply. The SP6132's 30A capability with external NFETs supports high-current auxiliary rails, while its small 10-pin MSOP package fits adjacent to the FPGA on densely-populated boards. The voltage-mode control provides predictable loop response, easing in-system validation of power sequencing and load-step behavior.
Recomendado
Graphics Card and High-Current GPU Power Stage
Graphics cards and discrete GPU auxiliary boards require compact, efficient high-current step-down stages. The SP6132's small MSOP-10 footprint and external NFET architecture allow PCB designers to place the FETs for optimal thermal spreading while keeping the controller out of the high-current path. The 300 kHz fixed frequency and short-circuit auto-restart are particularly suited to fault-tolerant GPU power designs where brief overloads must not latch the system off.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SP6132 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SP6132H | SP6132HCU-L/TR | SP6132ACU |
|---|---|---|---|---|
| Package | MSOP-10 | MSOP-10 (same) | MSOP-10 (same) | MSOP-10 (same) |
| Brand | Sipex / MaxLinear | MaxLinear (same brand) | MaxLinear (same brand) | MaxLinear (same brand) |
| Switching Frequency | 300 kHz | 300 kHz | 300 kHz | 300 kHz |
| VIN Range (Power Stage) | 3 V to 12 V | Extended to 15 V (high-voltage variant) | Extended to 15 V | 3 V to 12 V |
| VCC Bias Voltage | 5 V | 5 V | 5 V | 5 V |
| NFET Driver Sink Impedance | 1.5 ohm | 1.5 ohm | 1.5 ohm | 1.5 ohm |
| NFET Driver Source Impedance | 2 ohm | 2 ohm | 2 ohm | 2 ohm |
| Maximum Output Current | 30 A (external FETs) | 30 A (external FETs) | 30 A (external FETs) | 30 A (external FETs) |
| UVLO Monitoring | Both VCC and VIN | Both VCC and VIN | Both VCC and VIN | Both VCC and VIN |
| Short-Circuit Protection | Yes, auto-restart | Yes, auto-restart | Yes, auto-restart | Yes, auto-restart |
Principais diferenciais
- Dual-supply architecture minimizes internal dissipation (vs SP6132H)
- Compact 10-pin MSOP with high current capability (vs SP6132H (MSOP-10))
- Integrated short-circuit protection with auto-restart (vs Discrete buck controller designs)
Notas de projeto
The SP6132 uses a dual-supply topology: the power stage runs from VIN at 3-12 V while the controller logic is biased from VCC at 5 V. Ensure that VCC is present before VIN ramps during power-up, or that the sequencing meets the datasheet UVLO thresholds (UVLO monitors both rails). VCC at 5 V minimizes internal dissipation in the controller IC because the gate-charge current is not drawn from the high-current VIN rail.
Place the bootstrap capacitor (typically 0.1 µF to 1 µF ceramic) as close as possible between the BOOT and UGATE pins to minimize parasitic inductance in the high-side gate drive loop. Keep the power-stage switching node (UGATE drain / LGATE source connection) compact and away from sensitive analog feedback traces. Use a star-ground topology tying PGND and signal GND at a single point beneath the IC to avoid ground bounce from the high-current gate driver transitions.
Do not operate the controller without both VCC and VIN within their respective ranges - the UVLO will not protect the external FETs from partial-drive conditions that cause linear-region operation and excessive dissipation. Select external NFETs with low gate charge (Qg) to keep switching losses manageable at 300 kHz. The SS/TRK capacitor value sets the startup ramp rate; a value that is too small can cause input inrush, while too large delays system readiness.
Informações de conformidade
Compliance status not explicitly stated in verified web data. The SP6132ACU automotive/extended-temp variant suggests AEC-Q100 capability may exist within the family - confirm via MaxLinear datasheet before automotive qualification.
