ADI LTC3728LZEUH#PBF
| Produttore | |
| Cod. Prod. | LTC3728LZEUH#PBF |
| Cod. LCSC | C685823 |
| Imballo | QFN-32(5x5) |
| Numero Cliente | |
| Attr. chiave | 2 Adjustable Step-down type QFN-32(5x5) DC DC Switching Controllers RoHS |
| Scheda Tecnica | ADI LTC3728LZEUH#PBF |
| Conformità RoHS | 1 documenti disponibili |
Specifiche del Prodotto
| Tipo | Descrizione | |
|---|---|---|
| Categoria | Integrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers | |
| Produttore | ADI | |
| Imballo | QFN-32(5x5) | |
| Operating Temperature | -40℃~+85℃@(TA) | |
| Synchronous Rectifier | Yes | |
| Output Current | - | |
| Features | Adjustable soft-start;Protection latch;Frequency synchronization;Operating status indication;Overcurrent Protection | |
| Number of Channels | 2 | |
| Topology | Buck | |
| Frequency - Switching | 550kHz | |
| Operating Voltage | 4.5V~28V | |
| Output Type | Adjustable | |
| Switch tube (built-in/external) | External | |
| Output Voltage | - | |
| Function | Step-down type | |
| Quiescent Current | 20uA |
| Tipo | Descrizione | |
|---|---|---|
| Categoria | Integrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers | |
| Produttore | ADI | |
| Imballo | QFN-32(5x5) | |
| Operating Temperature | -40℃~+85℃@(TA) | |
| Synchronous Rectifier | Yes | |
| Output Current | - | |
| Features | Adjustable soft-start;Protection latch;Frequency synchronization;Operating status indication;Overcurrent Protection | |
| Number of Channels | 2 |
| Tipo | Descrizione | |
|---|---|---|
| Topology | Buck | |
| Frequency - Switching | 550kHz | |
| Operating Voltage | 4.5V~28V | |
| Output Type | Adjustable | |
| Switch tube (built-in/external) | External | |
| Output Voltage | - | |
| Function | Step-down type | |
| Quiescent Current | 20uA |
Descrizione
The LTC3728L/LTC3728LX are dual high performance step-down switching regulator controllers that drive all N‑channel synchronous power MOSFET stages. A constant-frequency, current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.
OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations, and a wide 4.5V to 28V (30V maximum) input supply range encompasses all battery chemistries.
A RUN/SS pin for each controller provides both softstart and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until VOUT returns to normal. The FCB mode pin can select among Burst Mode, constant-frequency mode and continuous inductor current mode or regulate a secondary winding. The LTC3728L/LTC3728LX include a power good output pin that indicates when both outputs are within 7.5% of their designed set point.
Caratteristiche
- Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
- OPTI-LOOP Compensation Minimizes COUT
- ±1% Output Voltage Accuracy (LTC3728LC)
- Power Good Output Voltage Indicator
- Phase-Lockable Fixed Frequency 250kHz to 550kHz
- Dual N-Channel MOSFET Synchronous Drive
- Wide VIN Range: 4.5V to 28V Operation
- Very Low Dropout Operation: 99% Duty Cycle
- Adjustable Soft-Start Current Ramping
- Foldback Output Current Limiting
- Latched Short-Circuit Shutdown with Defeat Option
- Output Overvoltage Protection
- Low Shutdown IQ: 20µA
- 5V and 3.3V Standby Regulators
- 3 Selectable Operating Modes: Constant-Frequency, Burst Mode Operation and PWM
- 5mm × 5mm QFN and 28-Lead Narrow SSOP Packages
Applicazioni
- Notebook and Palmtop Computers
- Telecom Systems
- Portable Instruments
- Battery-Operated Digital Devices
- DC Power Distribution Systems
Specifiche del Prodotto
| Tipo | Descrizione | |
|---|---|---|
| Categoria | Integrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers | |
| Produttore | ADI | |
| Imballo | QFN-32(5x5) | |
| Operating Temperature | -40℃~+85℃@(TA) | |
| Synchronous Rectifier | Yes | |
| Output Current | - | |
| Features | Adjustable soft-start;Protection latch;Frequency synchronization;Operating status indication;Overcurrent Protection | |
| Number of Channels | 2 | |
| Topology | Buck | |
| Frequency - Switching | 550kHz | |
| Operating Voltage | 4.5V~28V | |
| Output Type | Adjustable | |
| Switch tube (built-in/external) | External | |
| Output Voltage | - | |
| Function | Step-down type | |
| Quiescent Current | 20uA |
| Tipo | Descrizione | |
|---|---|---|
| Categoria | Integrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers | |
| Produttore | ADI | |
| Imballo | QFN-32(5x5) | |
| Operating Temperature | -40℃~+85℃@(TA) | |
| Synchronous Rectifier | Yes | |
| Output Current | - | |
| Features | Adjustable soft-start;Protection latch;Frequency synchronization;Operating status indication;Overcurrent Protection | |
| Number of Channels | 2 |
| Tipo | Descrizione | |
|---|---|---|
| Topology | Buck | |
| Frequency - Switching | 550kHz | |
| Operating Voltage | 4.5V~28V | |
| Output Type | Adjustable | |
| Switch tube (built-in/external) | External | |
| Output Voltage | - | |
| Function | Step-down type | |
| Quiescent Current | 20uA |
Descrizione
The LTC3728L/LTC3728LX are dual high performance step-down switching regulator controllers that drive all N‑channel synchronous power MOSFET stages. A constant-frequency, current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.
OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations, and a wide 4.5V to 28V (30V maximum) input supply range encompasses all battery chemistries.
A RUN/SS pin for each controller provides both softstart and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until VOUT returns to normal. The FCB mode pin can select among Burst Mode, constant-frequency mode and continuous inductor current mode or regulate a secondary winding. The LTC3728L/LTC3728LX include a power good output pin that indicates when both outputs are within 7.5% of their designed set point.
Caratteristiche
- Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
- OPTI-LOOP Compensation Minimizes COUT
- ±1% Output Voltage Accuracy (LTC3728LC)
- Power Good Output Voltage Indicator
- Phase-Lockable Fixed Frequency 250kHz to 550kHz
- Dual N-Channel MOSFET Synchronous Drive
- Wide VIN Range: 4.5V to 28V Operation
- Very Low Dropout Operation: 99% Duty Cycle
- Adjustable Soft-Start Current Ramping
- Foldback Output Current Limiting
- Latched Short-Circuit Shutdown with Defeat Option
- Output Overvoltage Protection
- Low Shutdown IQ: 20µA
- 5V and 3.3V Standby Regulators
- 3 Selectable Operating Modes: Constant-Frequency, Burst Mode Operation and PWM
- 5mm × 5mm QFN and 28-Lead Narrow SSOP Packages
Applicazioni
- Notebook and Palmtop Computers
- Telecom Systems
- Portable Instruments
- Battery-Operated Digital Devices
- DC Power Distribution Systems
Conformità & Codici di Esportazione
| Tipo | Dettagli |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Tipo | Dettagli |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Tipo | Dettagli |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |