Linear And Switching Voltage Regulator IC 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3)
DC/DC Cntrlr Single-OUT Step Down 355kHz 20-Pin WQFN EP T/R
Voltage Regulators - Switching Regulators Dual Sync, Step-Down Controller
Feature
- Input Voltage Range: 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-CAP? Mode Control Architecture with 300-kHz and 355-kHz Frequency Setting
- Out-of-Audio? (OOA) Light-Load Operation
- Internal 3.2-ms Voltage Servo Soft-Start
- Low-Side RDS(on) Current Sensing Scheme
- Built-In Output Discharge Function
- Separate Enable Input for Switchers
- Dedicated OC Setting Terminals
- Power Good Indicator
- OVP, UVP, and OCP Protection
- Non-Latch UVLO and OTP Protection
- 20-Pin, 3-mm × 3-mm, WQFN (RUK) Package
The TPS51275B-1 device is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. The device has 5-V and 3.3-V low-dropout regulators (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 TPS51275B-1 device supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP control provides convenient and efficient operation. The device operates with a supply input voltage ranging from 5 to 24 V and supports output voltages of 5 V and 3.3 V. The TPS51275B-1 device is available in a 20-pin, 3-mm × 3-mm, WQFN package and is specified from –40°C to 85°C.
