IS6605A - 6A Synchronous Buck Converter 4-16V Input | Innovisionsemi
N.º de pieza: IS6605A ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.28 | $128,00 |
| 500 | $1.05 | $525,00 |
| 1.000 | $0.89 | $890,00 |
| 3.000 | $0.76 | $2.280,00 |
IS6605A Descripción general
A synchronous buck converter is a switching regulator topology that uses two MOSFETs (a high-side switch and a low-side synchronous rectifier) instead of a diode to convert a higher DC voltage to a lower DC voltage. The IS6605A integrates both FETs, the control loop, and the gate drivers inside one package, which simplifies PCB layout, reduces BOM count, and improves efficiency compared to non-synchronous buck designs that lose power in a freewheeling diode. Buck converters belong to the broader family of DC-DC switching regulators, which themselves sit inside the power management IC (PMIC) category.
Key features of the IS6605A include internal compensation that removes the need for an external RC network, a PGOOD indicator for power-rail sequencing, soft-start to limit inrush current, and over-current / over-temperature / under-voltage lockout protections. It supports ceramic output capacitors and requires at least 1 uF of effective (X5R/X7R) input capacitance on VCC relative to AGND per the manufacturer datasheet.
Internally the device uses voltage-mode control with a fixed-frequency PWM architecture, providing predictable noise spectrum for EMI-sensitive designs. The high-side and low-side MOSFETs are optimized for 6 A continuous operation at 4-16 V VIN, enabling high full-load efficiency in compact footprints.
Typical applications are POL converters for FPGA, ASIC, SoC, and DSP cores in servers and telecom boards, distributed 5 V/3.3 V/1.8 V/1.0 V rails in networking switches, fan-out power for PCIe cards, and compact 12 V-input industrial embedded boards.
When designing with the IS6605A, place the input ceramic capacitor(s) as close as possible to the VIN and GND pads to minimize switching-loop parasitic inductance. Ensure the PGND and AGND are tied at a single quiet point under the IC, and follow the manufacturer's recommended inductor value and output capacitance for stable operation across the full 0.6 V to 5.5 V output range.
This page synthesizes distributor pricing, drop-in compatible alternatives, application examples, and practical design notes not found in the manufacturer datasheet, helping engineers select and qualify the IS6605A faster.
Alternativas directas para IS6605A — 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 IS6605A (mismo factor de forma y huella) — difiere en Input Voltage Range, Protection Features, Topology, Output Voltage Range, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
IS6605
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS54331DR
✅ Sustitución directa✓ En stock
$0.85 / unidad
Ver hoja de datos →MP2316
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SY8089IAAC
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS5430DDAR
✅ Sustitución directa✓ En stock
$1.19 / unidad
Ver hoja de datos →IS6605A Valores máximos y características eléctricas
| Topología | Synchronous Buck (Step-Down) |
| Número de salidas | 1 |
| Rango de tensión de entrada | 4 V to 16 V |
| Rango de tensión de salida | 0.6 V to 5.5 V (Adjustable) |
| Continuous Output Current | 6 A |
| Output Voltage Adjustment | Adjustable |
| Internal MOSFETs | Yes (FET-integrated, high-side + low-side) |
| Internal Compensation | Yes (no external RC network required) |
| Rango de temperatura de funcionamiento | -40 C to +125 C (TJ) |
| Encapsulado / Carcasa | 14-WFQFN (QFN-14, 2x3 mm) |
| Tipo de montaje | Surface Mount |
| Input Decoupling Capacitor (VCC) | >= 1 uF ceramic X5R/X7R (relative to AGND) |
| Protection Features | Over-Current Protection (OCP), Over-Temperature Protection (OTP), Under-Voltage Lockout (UVLO) |
| Power Good (PGOOD) Indicator | Yes |
| Arranque suave | Yes (internal) |
| Estado RoHS | Compliant |
Configuración de pines de IS6605A
| Pin 1 | PGND — Power ground for high-current switching loop |
| Pin 2 | LX — Switching node, connects to output inductor |
| Pin 3 | PGND — Power ground for high-current switching loop |
| Pin 4 | VIN — Input supply voltage (4 V to 16 V) |
| Pin 5 | VIN — Input supply voltage (4 V to 16 V) |
| Pin 6 | EN — Enable input (active high) |
| Pin 7 | PGOOD — Power-good indicator (open-drain) |
| Pin 8 | FB — Feedback pin for output voltage programming |
| Pin 9 | COMP — Compensation node (internal compensation - typically NC externally) |
| Pin 10 | VCC — Internal LDO output; connect >= 1 uF X5R/X7R to AGND |
| Pin 11 | AGND — Analog ground, quiet ground reference |
| Pin 12 | SS — Soft-start control pin |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | EP — Exposed thermal pad - must be soldered to PCB ground plane |
Aplicaciones típicas
IS6605A es adecuado para 6 aplicacións: Server and Telecom Point-of-Load Power, FPGA / ASIC Core and Auxiliary Rail Power, Networking Switch and Router Line Cards, Industrial Embedded Boards and Fan-Out Power, PCIe Card and Storage Controller Power, Test and Measurement Instrumentation.
Server and Telecom Point-of-Load Power
The IS6605A fits server and telecom point-of-load applications because it accepts 12 V backplane input and converts it efficiently to the 0.6 V to 5.5 V rails required by CPUs, ASICs, and DDR memory. Its 6 A continuous output current and internal FETs eliminate the need for an external MOSFET half-bridge, reducing PCB area by roughly 50% compared to controller-plus-FET designs. The adjustable output covers all standard POL voltages (1.0 V, 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5 V) from a single BOM, simplifying platform qualification across product variants.
Recomendado
FPGA / ASIC Core and Auxiliary Rail Power
FPGAs and ASICs typically require 0.85 V to 1.8 V core rails plus 2.5 V / 3.3 V auxiliary rails, all of which the IS6605A can generate directly from a 12 V input. The internal compensation eliminates the stability-tuning step required by external-comp designs, shortening bring-up time. With PGOOD and soft-start, multi-rail sequencing is straightforward: simply chain the PGOOD of the first rail into the EN of the next, a pattern used in most modern SoC power trees.
Recomendado
Networking Switch and Router Line Cards
Networking line cards need 1.0 V, 1.2 V, 1.8 V, and 3.3 V rails from a 12 V backplane with tight regulation and high efficiency. The IS6605A's synchronous topology and integrated FETs deliver full-load efficiency above 90%, which keeps the line card within thermal budget even in dense 1U chassis. The 14-WFQFN (2x3 mm) footprint allows placement directly under the load IC, minimizing the high-di/dt current loop and improving transient response.
Recomendado
Industrial Embedded Boards and Fan-Out Power
Industrial single-board computers and fan-out cards typically run from a 12 V or 9 V input and need multiple isolated voltage domains. The IS6605A can power SoC cores, DDR termination, and I/O rails from a single 12 V rail. Its -40 C to +125 C junction-temperature range makes it suitable for industrial and outdoor enclosures. Designers can place several IS6605A devices in parallel rails without worrying about cross-regulation, because each operates as an independent closed-loop converter.
Recomendado
PCIe Card and Storage Controller Power
PCIe cards, SSDs, and storage controllers typically require 3.3 V auxiliary and 1.0 V to 1.8 V core rails from a 12 V edge connector. The IS6605A's 6 A capability covers the peak inrush of hot-plug controllers and provides headroom for the inrush of downstream bulk capacitors. The internal over-current and over-temperature protections prevent latch-up under fault conditions, which is critical for hot-swap compliance.
Recomendado
Test and Measurement Instrumentation
Test and measurement equipment needs clean, low-noise rails for analog front ends, ADCs, DACs, and DSP processors. The IS6605A's synchronous buck topology generates minimal low-frequency ripple, and its fixed switching frequency produces a predictable noise spectrum that can be filtered with simple LC networks. With 6 A of current, it can power multi-channel digitizers and AWG boards where several rails must be generated from a single 12 V bench supply.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para IS6605A — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | IS6605 | TPS54331DR | MP2316 | SY8089IAAC | TPS5430DDA |
|---|---|---|---|---|---|---|
| Brand | Innovisionsemi | Innovisionsemi | Texas Instruments | Monolithic Power Systems | Silergy | Texas Instruments |
| Package | QFN-14 (2x3 mm) | QFN-14 (2x3 mm) | QFN-14 (2x3 mm) | QFN-14 (2x3 mm) | QFN-14 (2x3 mm) | QFN-14 (2x3 mm) |
| Internal FETs | Yes (HS+LS integrated) | Yes | Yes | Yes | Yes | Yes |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Diferenciadores clave
- Same QFN-14 (2x3 mm) footprint as multiple TI and MPS parts (frente a TPS54331DR (Texas Instruments))
- 6 A output - higher than most QFN-14 peers (frente a MP2316 (Monolithic Power Systems))
- 4-16 V input range covers all 5 V / 9 V / 12 V rails (frente a SY8089IAAC (Silergy))
Notas de diseño
Place the input ceramic capacitor(s) as close as possible to the VIN and PGND pins to minimize the high-di/dt switching-loop parasitic inductance. Per the Innovisionsemi datasheet, use at least 1 uF of effective X5R/X7R capacitance on VCC referenced to AGND, and 2x 10 uF 25 V X7R ceramics on VIN referenced to PGND for 6 A full-load operation. Keep the LX node copper area compact to reduce EMI radiation.
Estimated: at VIN = 12 V, VOUT = 3.3 V, and 6 A load, the IS6605A dissipates approximately (12 - 3.3) V x 6 A x (1 - eta) where efficiency eta is typically 92%, giving about 4.7 W. The 14-WFQFN (2x3 mm) package relies entirely on the exposed pad for heat removal. Solder the EP to a ground copper pour of at least 1 square inch (645 mm^2) on the top and bottom layers, stitched with thermal vias, to keep junction temperature below 125 C in 25 C ambient. Without adequate copper, the device will throttle into OTP well before reaching 6 A.
Do not use Y5V or Z5U input capacitors - they lose 50-80% of nominal capacitance under DC bias and will cause VIN ripple instability at high load. The AGND and PGND must be tied together at a single quiet point under the IC; do not split the ground plane or route high-current PGND under sensitive analog traces. The FB resistor divider should use 1% tolerance resistors and be placed within 5 mm of the FB pin to avoid noise pickup.
The LX switching node is a high-dV/dt node that can inject common-mode noise into adjacent signal traces. Route no sensitive analog lines within 3 mm of LX or the input capacitors. If using the PGOOD output, route it away from LX and add a 100 kohm pull-up to a quiet rail (PGOOD is open-drain). For multi-rail sequencing, daisy-chain PGOOD of rail N into EN of rail N+1 through a simple RC delay for soft-start coordination.
Información de cumplimiento
RoHS compliance and lead-free status confirmed via JLCPCB and DigiKey listings. REACH, halogen-free, and conflict-minerals declarations were not present in the public distributor data fetched on 2026-10-20 - contact Innovisionsemi directly for full certificates. Not AEC-Q100 qualified per available data; not recommended for automotive safety-critical applications.
