IC 1225C - TPS51225C
Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs.
Description :
The TPS51225C is a cost-effective, dual synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components.
The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency.
The TPS51225C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, DCAP™ control provides convenient and efficient operation.
The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225C is available in a 20-pin, 3 mm × 3mm, QFN package and is specified from –40°C to 85°C.
Features:
• Input Voltage Range: 5.5 V to 24 V
• Notebook Computers
• Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
• Built-in, 100-mA, 5-V and 3.3-V LDOs
• Clock Output for Charge-Pump
• ±1% Reference Accuracy
• Adaptive On-time D-CAP™ Mode Control Architecture with 300kHz/355kHz Frequency Setting
• Auto-skip Light Load Operation ( TPS51225C )
• Internal 0.8-ms Voltage Servo Soft-Start
• Low-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
• Built-in Output Discharge Function
• Separate Enable Input for Switchers ( TPS51225C )
• Dedicated OC Setting Terminals
• Power Good Indicator
• OVP/UVP/OCP Protection
• Non-latch UVLO/OTP Protection
• 20-Pin, 3 mm × 3 mm, QFN (RUK)
Applications:
• Notebook Computers
• Netbook, Tablet Computers
Service :
Lenovo G480 Core i3
Description :
The TPS51225C is a cost-effective, dual synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components.
The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency.
The TPS51225C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, DCAP™ control provides convenient and efficient operation.
The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225C is available in a 20-pin, 3 mm × 3mm, QFN package and is specified from –40°C to 85°C.
Features:
• Input Voltage Range: 5.5 V to 24 V
• Notebook Computers
• Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
• Built-in, 100-mA, 5-V and 3.3-V LDOs
• Clock Output for Charge-Pump
• ±1% Reference Accuracy
• Adaptive On-time D-CAP™ Mode Control Architecture with 300kHz/355kHz Frequency Setting
• Auto-skip Light Load Operation ( TPS51225C )
• Internal 0.8-ms Voltage Servo Soft-Start
• Low-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
• Built-in Output Discharge Function
• Separate Enable Input for Switchers ( TPS51225C )
• Dedicated OC Setting Terminals
• Power Good Indicator
• OVP/UVP/OCP Protection
• Non-latch UVLO/OTP Protection
• 20-Pin, 3 mm × 3 mm, QFN (RUK)
Applications:
• Notebook Computers
• Netbook, Tablet Computers
Service :
Lenovo G480 Core i3
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