| Vin (Min) (V) | 4.5 |
| Vin (Max) (V) | 24 |
| Vout (Min) (V) | 0.76 |
| Vout (Max) (V) | 5.5 |
| Iout (Max) (A) | 15 |
| Iq (Typ) (uA) | 450 |
| Switching frequency (Min) (kHz) | 350 |
| Switching frequency (Max) (kHz) | 350 |
| Features | Enable, Light Load Efficiency, Pre-Bias Start-Up, Synchronous Rectification |
| Regulated outputs (#) | 2 |
| Number of phases | 1 |
| Rating | Catalog |
- D-CAP2 Mode? Control
- Fast Transient Response
- No External Parts Required for Loop
Compensation - Compatible With Ceramic Output
Capacitors
- High Initial Reference Accuracy (±1%)
- Low Output Ripple
- Wide Input Voltage Range: 4.5 V to 24 V
- Output Voltage Range: 0.76 V to 5.5 V
- Low-Side RDS(ON) Loss-Less
Current Sensing - Adaptive Gate Drivers with Integrated
Boost Diode - Adjustable Soft Start
- Non-Sinking Pre-Biased Soft Start
- 350-kHz Switching Frequency
- Cycle-by-Cycle Over-Current Limiting Control
- 30-mV to 300-mV OCP Threshold Voltage
- Thermally Compensated OCP by 4000 ppm/°C at
ITRIP - Auto-Skip Eco-mode for High Efficiency at
Light Load - APPLICATIONS
- Point-of-Load Regulation in Low Power
Systems for Wide Range of Applications- Digital TV Power Supply
- Networking Home Terminal
- Digital Set-Top Box (STB)
- DVD Player/Recorder
- Gaming Consoles
- Point-of-Load Regulation in Low Power
The TPS53128 is a dual, adaptive on-time D-CAP2 mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment's power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53128 uses the D-CAP2 Mode topology which provides a very fast transient response with no external component.
The TPS53128 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V.
The TPS53128 is available in 4-mm x 4-mm 24 pin QFN (RGE) or 24 pin TSSOP (PW) packages, and is specified from ?40°C to 85°C ambient temperature range.
