ADI LT8644SIV#TRPBF
| Manufacturer | |
| MPN | LT8644SIV#TRPBF |
| LCSC Part # | C3188758 |
| Packaging | LQFN-24(4x4) |
| Customer # | |
| Key Attributes | 3.5MHz Step-down type Adjustable 16A 600mV~8V LQFN-24(4x4) Voltage Regulators - DC DC Switching Regulators RoHS |
| Datasheet | ADI LT8644SIV#TRPBF |
| RoHS Compliance | 1 documents available |
| Alternative Parts | 1 |
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators | |
| Manufacturer | ADI | |
| Packaging | LQFN-24(4x4) | |
| Operating Temperature | -40℃~+125℃@(TJ) | |
| Frequency - Switching | 3.5MHz | |
| Function | Step-down type | |
| Number of Outputs | 1 | |
| Features | EMI optimization (spread spectrum);Frequency synchronization;External compensation;Light load efficient mode;Adjustable soft-start;Operating status indication | |
| Output Type | Adjustable | |
| Topology | Buck | |
| Operating Voltage | 1.5V~8V | |
| Switch tube (built-in/external) | Built-in | |
| Output Current | 16A | |
| Output Voltage | 600mV~8V | |
| Quiescent Current | 180uA |
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators | |
| Manufacturer | ADI | |
| Packaging | LQFN-24(4x4) | |
| Operating Temperature | -40℃~+125℃@(TJ) | |
| Frequency - Switching | 3.5MHz | |
| Function | Step-down type | |
| Number of Outputs | 1 | |
| Features | EMI optimization (spread spectrum);Frequency synchronization;External compensation;Light load efficient mode;Adjustable soft-start;Operating status indication |
| Type | Description | |
|---|---|---|
| Output Type | Adjustable | |
| Topology | Buck | |
| Operating Voltage | 1.5V~8V | |
| Switch tube (built-in/external) | Built-in | |
| Output Current | 16A | |
| Output Voltage | 600mV~8V | |
| Quiescent Current | 180uA |
Introduction
The LT8644S synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by eliminating layout sensitivity. The fast, clean, low-overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 20ns minimum on-time allows high step down ratios even at high switching frequencies. External compensation via the V0 pin allows for fast transient response. PolyPhase operation allows multiple LT8644S regulators to run with interleaving phase shift to provide more output current. Burst Mode operation enables low standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions. Soft-start and tracking functionality is accessed via the SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.
Features
- Silent Switcher Architecture
- Ultralow EMI Emissions on Any PCB
- Internal Bypass Capacitors Reduce Radiated EMI
- Optional Spread Spectrum Modulation
- High Efficiency at High Frequency
- Up to 94% Efficiency at 2MHz, 3.3VIN to 1.2VOUT
- Up to 93% Efficiency at 2MHz, 5VIN to 1.2VOUT
- PVIN Range: 1.5V to 8V, SVIN Range: 2.7V to 8V
- VOUT Range: 0.6V to VIN
- Reference Accuracy: ±0.8% Over Temperature
- PolyPhase Operation: Up to 12 Phases
- Fast Transient Response with External Compensation
- Forced Continuous Mode Operation
- Low Quiescent Current Burst Mode Operation
- 180µA IQ Regulating 5VIN to 1.2VOUT Output Ripple <10mVPP
- Fast Minimum Switch On-Time: 20ns
- Adjustable and Synchronizable: 300kHz to 3.5MHz
- Output Soft-Start and Power Good
- Small 24-Lead 4mm × 4mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Applications
- Automotive and Industrial Supplies
- General Purpose Step-Down Conversion
| Qty | Unit Price(Reference Only) | Total Amount |
|---|---|---|
| 1+ | $ 12.6632 | $ 12.66 |
| 200+ | $ 4.9005 | $ 980.10 |
| 500+ | $ 4.7293 | $ 2364.65 |
| 1,000+ | $ 4.6429 | $ 4642.90 |
Standard Packaging2500/Full Reel | ||
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators | |
| Manufacturer | ADI | |
| Packaging | LQFN-24(4x4) | |
| Operating Temperature | -40℃~+125℃@(TJ) | |
| Frequency - Switching | 3.5MHz | |
| Function | Step-down type | |
| Number of Outputs | 1 | |
| Features | EMI optimization (spread spectrum);Frequency synchronization;External compensation;Light load efficient mode;Adjustable soft-start;Operating status indication | |
| Output Type | Adjustable | |
| Topology | Buck | |
| Operating Voltage | 1.5V~8V | |
| Switch tube (built-in/external) | Built-in | |
| Output Current | 16A | |
| Output Voltage | 600mV~8V | |
| Quiescent Current | 180uA |
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators | |
| Manufacturer | ADI | |
| Packaging | LQFN-24(4x4) | |
| Operating Temperature | -40℃~+125℃@(TJ) | |
| Frequency - Switching | 3.5MHz | |
| Function | Step-down type | |
| Number of Outputs | 1 | |
| Features | EMI optimization (spread spectrum);Frequency synchronization;External compensation;Light load efficient mode;Adjustable soft-start;Operating status indication |
| Type | Description | |
|---|---|---|
| Output Type | Adjustable | |
| Topology | Buck | |
| Operating Voltage | 1.5V~8V | |
| Switch tube (built-in/external) | Built-in | |
| Output Current | 16A | |
| Output Voltage | 600mV~8V | |
| Quiescent Current | 180uA |
Introduction
The LT8644S synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by eliminating layout sensitivity. The fast, clean, low-overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 20ns minimum on-time allows high step down ratios even at high switching frequencies. External compensation via the V0 pin allows for fast transient response. PolyPhase operation allows multiple LT8644S regulators to run with interleaving phase shift to provide more output current. Burst Mode operation enables low standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions. Soft-start and tracking functionality is accessed via the SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.
Features
- Silent Switcher Architecture
- Ultralow EMI Emissions on Any PCB
- Internal Bypass Capacitors Reduce Radiated EMI
- Optional Spread Spectrum Modulation
- High Efficiency at High Frequency
- Up to 94% Efficiency at 2MHz, 3.3VIN to 1.2VOUT
- Up to 93% Efficiency at 2MHz, 5VIN to 1.2VOUT
- PVIN Range: 1.5V to 8V, SVIN Range: 2.7V to 8V
- VOUT Range: 0.6V to VIN
- Reference Accuracy: ±0.8% Over Temperature
- PolyPhase Operation: Up to 12 Phases
- Fast Transient Response with External Compensation
- Forced Continuous Mode Operation
- Low Quiescent Current Burst Mode Operation
- 180µA IQ Regulating 5VIN to 1.2VOUT Output Ripple <10mVPP
- Fast Minimum Switch On-Time: 20ns
- Adjustable and Synchronizable: 300kHz to 3.5MHz
- Output Soft-Start and Power Good
- Small 24-Lead 4mm × 4mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Applications
- Automotive and Industrial Supplies
- General Purpose Step-Down Conversion
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Type | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Alternative Parts
| MPN | Manufacturer | Packaging | Availability | Unit Price | ||
|---|---|---|---|---|---|---|
| LT8644SIV#TRMPBF | ADI | LQFN-24(4x4) | 8 | $ 7.8916 |