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TPS51225BRUKR TPS51225CRUKR Power Path Management IC Switching Controllers Dual Sync Step-Down Controller
FEATURES
• Input Voltage Range: 5.5 V to 24 V
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-CAPTM Mode Control Architecture with 300kHz/355kHz Frequency Setting
Auto-skip Light Load Operation (TPS51225/C)
OOA Light Load Operation (TPS51225B)
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 (TPS51225/B/C)
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
DESCRIPTION
The TPS51225/B/C 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 TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D- CAPTM 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 TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.
ORDERING INFORMATION
ORDERABLE DEVICE NUMBER | ENABLE FUNCTION | SKIP MODE | ALWAYS ON-LDO | PACKAGE | OUTPUT SUPPLY | QUANTITY |
TPS51225RUKR | EN1/ EN2 | Auto-skip | VREG3 | PLASTIC Quad Flat Pack (20 pin QFN) | Tape and Reel | 3000 |
TPS51225RUKT | Mini reel | 250 | ||||
TPS51225BRUKR | EN1/ EN2 | OOA | VREG3 | Tape and Reel | 3000 | |
TPS51225BRUKT | Mini reel | 250 | ||||
TPS51225CRUKR | EN1/ EN2 | Auto-skip | VREG3 & VREG5 | Tape and Reel | 3000 | |
TPS51225CRUKT | Mini reel | 250 |