AP64352SP-13 - 3.5A 40V Sync Buck Converter | Diodes Inc
N.º de pieza: AP64352SP-13 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.28 | $12,80 |
| 100 | $1.05 | $105,00 |
| 500 | $0.88 | $440,00 |
| 1.000 | $0.74 | $740,00 |
| 2.500 | $0.65 | $1.625,00 |
AP64352SP-13 Descripción general
A buck converter (step-down switching regulator) is a type of switched-mode power supply (SMPS) that efficiently converts a higher DC input voltage to a lower DC output voltage. It belongs to the broader hierarchy: buck converter -> DC-DC converter -> switching regulator -> voltage regulator -> power management IC -> semiconductor. Compared to linear regulators, buck converters achieve much higher efficiency (often >90%) by rapidly switching the input voltage through an inductor, rather than continuously burning excess voltage as heat. The synchronous variant uses a MOSFET in place of the conventional Schottky rectifier, further improving efficiency at high load currents.
Key features of the AP64352SP-13 include its wide 3.8V-40V input range suitable for 12V/24V industrial buses, 3.5A continuous output current capability, programmable switching frequency, internal compensation that minimizes external component count, peak current mode control for fast transient response, and integrated soft-start for controlled inrush. The exposed thermal pad on the SOIC-8 package provides a low-resistance path for heat dissipation.
Architecturally, the device uses peak current mode control with internal compensation, simplifying loop design and eliminating the need for external compensation components. The 75mΩ/45mΩ integrated MOSFETs reduce both BOM count and PCB footprint, while proprietary light-load management maintains high efficiency across the entire load range. The internal reference is trimmed to 0.8V ±1% for accurate output regulation.
Typical applications include distributed power systems, home appliances, white goods, flat-panel TV power, audio systems, network systems, and general-purpose 12V/24V industrial point-of-load (POL) conversion. The wide input range also makes it well-suited for automotive aftermarket and eMobility applications operating from multi-cell battery stacks.
When designing with the AP64352SP-13, place the input ceramic capacitor as close as possible to the PVIN and PGND pins to minimize switching noise. The exposed pad must be soldered to a sufficient copper pour (recommended at least 1 square inch) to dissipate heat and provide electrical ground.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on generic component search engines, giving engineers a single source for parametric, application, and sourcing decisions on the AP64352SP-13.
Alternativas directas para AP64352SP-13 — 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 AP64352SP-13 (mismo factor de forma y huella) — difiere en Input Voltage Range, Output Voltage Range, Package, RoHS Status, Topology.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AP64351SP-13
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AP64352SP-13
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.65 / unidad
Ver hoja de datos →AP62300WU-7
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS54360DDAR
✅ Sustitución directa✓ En stock
$0.95 / unidad
Ver hoja de datos →MP2459GJ-P
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AP64352SP-13 Valores máximos y características eléctricas
| Topología | Synchronous Buck (Step-Down) |
| Rango de tensión de entrada | 3.8 V to 40 V |
| Rango de tensión de salida | 0.8 V to 39 V (adjustable) |
| Continuous Output Current | 3.5 A |
| High-Side MOSFET Rds(on) | 75 mΩ (typical) |
| Low-Side MOSFET Rds(on) | 45 mΩ (typical) |
| Frecuencia de conmutación | Programmable |
| Control Mode | Peak Current Mode |
| Corriente en reposo | Low Iq |
| Internal Compensation | Yes |
| Arranque suave | Internal |
| Encapsulado | 8-SOIC (Exposed Pad), 0.154" / 3.90 mm width |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per DigiKey listing, e3 terminal finish) |
Configuración de pines de AP64352SP-13
| Pin 1 | AGND — Analog ground |
| Pin 2 | FB — Feedback input (0.8V reference) |
| Pin 3 | RT/EN — Switching frequency set / enable input |
| Pin 4 | COMP — Compensation node |
| Pin 5 | BST — Bootstrap for high-side gate driver |
| Pin 6 | SW — Switch node to external L |
| Pin 7 | PVIN — Power input supply |
| Pin 8 | PGND — Power ground |
| Pin EP | Thermal Pad — Exposed pad - solder to PGND copper pour |
Aplicaciones típicas
AP64352SP-13 es adecuado para 6 aplicacións: 12V/24V Industrial Point-of-Load Conversion, Home Appliance and White Goods Power, Flat-Panel TV and Audio System Power, Distributed Power and Network Systems, LED Lighting and Driver Electronics, eMobility and Battery-Powered Equipment.
12V/24V Industrial Point-of-Load Conversion
The AP64352SP-13's 3.8V-40V VIN range and 3.5A continuous output make it a strong fit for industrial POL conversion from 12V or 24V bus rails to 5V, 3.3V, or 1.8V sub-rails. With 75mΩ/45mΩ internal MOSFETs, efficiency stays above 90% at typical 1-2A loads, and peak current mode control with internal compensation eliminates the need for external compensation parts. Placed on the same PCB as a microcontroller or FPGA, it powers downstream digital ICs with minimal thermal footprint. Designers should provide at least 1 square inch of copper on the exposed pad to manage dissipation under worst-case 24V-to-3.3V conversion.
Recomendado
Home Appliance and White Goods Power
The AP64352SP-13 is widely deployed in home appliances - washing machines, refrigerators, dishwashers, and microwave ovens - where a 24V or 12V rectified mains rail must be stepped down to logic-level voltages for MCUs, displays, and sensors. The wide 40V VIN handles rectified 18VAC universal-mains inputs with adequate margin, while the SOIC-8 EP package fits the dense PCB layouts of slim appliances. Internal soft-start prevents inrush on large output capacitors, and the enable function simplifies standby power management.
Recomendado
Flat-Panel TV and Audio System Power
Flat-panel TVs and home-theater audio systems use multiple DC rails (12V, 5V, 3.3V, 1.8V) derived from a 12V or 24V backplane voltage. The AP64352SP-13 efficiently generates these rails with low standby quiescent current, supporting ENERGY STAR standby power requirements. Its 3.5A capability handles USB-powered charging ports and audio amplifier rails, while the exposed pad package enables slim-line PCB layouts where board height is constrained.
Recomendado
Distributed Power and Network Systems
Network switches, routers, and distributed-power architectures route 12V or 24V bus voltages to multiple point-of-load regulators. The AP64352SP-13's 3.5A capability suits mid-power PoE applications, fan power supplies, and small-form-factor pluggable (SFP) module rails. Its peak current mode control shares load well with sibling regulators, and the SOIC-8 EP package delivers solid thermal performance in the enclosed, low-airflow environments of network equipment chassis.
Recomendado
LED Lighting and Driver Electronics
High-brightness LED drivers and architectural lighting systems use 24V or 12V class-2 power distribution, then step down to LED string voltages. The AP64352SP-13 supports constant-current LED driver front-ends and the auxiliary 5V/3.3V logic rails that drive MCU-controlled dimming circuits. Its wide VIN tolerates the inductive spikes of PWM dimming and handles the inrush of large LED arrays at cold-start.
Recomendado
eMobility and Battery-Powered Equipment
Light electric vehicles, e-bikes, and battery-powered industrial equipment use multi-cell Li-ion battery stacks (24V to 42V nominal) where step-down conversion is needed for 12V, 5V and 3.3V rails. The AP64352SP-13's 40V VIN rating tolerates fully-charged 10S Li-ion (42V) packs, while its low quiescent current extends standby battery life. The exposed pad package handles the elevated ambient temperatures inside eMobility enclosures and charger housings.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AP64352SP-13 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AP64351SP-13 | AP62300WU-7 | TPS54360DDAR | MP2459GJ-P |
|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments | Monolithic Power Systems |
| Package | 8-SOIC (Exposed Pad) | 8-SOIC (Exposed Pad) - same | 8-SOIC (Exposed Pad) - same | 8-SO PowerPAD - same | 8-SOIC (Exposed Pad) - same |
| Input Voltage Range | 3.8 V to 40 V | 3.8 V to 40 V | 4.5 V to 18 V | 4.5 V to 60 V | 4.5 V to 40 V |
| Output Current | 3.5 A | 2 A | 3 A | 3.5 A | 0.5 A |
| Output Voltage Range | 0.8 V to 39 V | 0.8 V to 39 V | 0.8 V to 17 V | 0.8 V to 58 V | 0.81 V to 39 V |
| Switching Frequency | Programmable | Programmable | Programmable | Programmable (100 kHz - 2.5 MHz) | Fixed |
Diferenciadores clave
- Higher output current capability at same SOIC-8 EP footprint (frente a AP64351SP-13)
- Wider VIN range than lower-voltage Diodes family members (frente a AP62300WU-7)
- Higher current and lower cost than TI TPS54360 family (frente a TPS54360DDAR)
Notas de diseño
Place the input ceramic capacitor (typically 10uF X7R) as close as possible to the PVIN and PGND pins, using wide copper pours and minimal via count. Estimated, given key inputs - the switching loop from input cap to high-side FET, SW node, low-side FET, and back to input cap carries high di/dt; loop area directly impacts EMI and ringing on the SW node. For multilayer boards, dedicate the top layer to power and the layer below to a continuous ground plane with stitching vias at the exposed pad.
The exposed thermal pad (EP) must be soldered to a copper pour with sufficient area to dissipate heat. Estimated: at 24VIN to 5VOUT at 1.5A (typical industrial use), power loss is roughly 1.1W; with the SOIC-8 EP theta_JA around 50 C/W on a 1-square-inch 1oz copper pour, junction temperature rises about 55C above ambient. Below 2W dissipation, no heatsink is needed; above 3W, increase the copper pour or add bottom-side cooling. The EP also serves as the electrical PGND return - poor soldering degrades both thermal and electrical performance.
Keep the feedback (FB) trace short and away from the SW switching node to avoid noise coupling that destabilizes the loop. Place the feedback divider resistors near the FB pin with the ground-side resistor referenced to the AGND pin rather than PGND, and tie AGND to PGND at a single point near the IC. The bootstrap capacitor (BST-SW) must be a low-ESR ceramic (0.1uF X7R) placed close to the BST and SW pins.
Do not exceed 40V on PVIN, including transients; add a TVS clamp if the input bus sees load-dump or inductive kick events above 40V. The EN/RT pin has a precise threshold - leaving it floating causes unpredictable startup; tie it to VIN through a 100kΩ resistor for always-on operation. The internal compensation is tuned for typical 4.7uH-22uH inductors and 22uF-68uF output capacitors - significant deviation from this range can cause instability and must be checked by transient load step testing.
Información de cumplimiento
Per DigiKey listing the part has e3 (matte tin) terminal finish and is RoHS-compliant. AEC-Q100 not qualified - not suitable for OEM automotive safety applications. REACH/halogen-free/conflict-mineral status not confirmed in available data - treated as 'unknown' per data authenticity rules.
