| Bus voltage (Max) (V) | 28 |
| Power switch | MOSFET |
| Input VCC (Min) (V) | 4.5 |
| Input VCC (Max) (V) | 15 |
| Peak output current (A) | 2.4 |
| Rise time (ns) | 50 |
| Operating temperature range (C) | -40 to 125 |
| Rating | Catalog |
| Number of channels (#) | 2 |
| Fall time (ns) | 40 |
| Prop delay (ns) | 70 |
| Iq (uA) | 3000 |
| Input threshold | TTL |
| Channel input logic | TTL |
| Negative voltage handling at HS pin (V) | 0 |
| Features | Dead Time Control, Synchronous Rectification |
| Driver configuration | Inverting |
- Floating Bootstrap or Ground-Reference High-Side Driver
- Adaptive Dead-Time Control
- 50-ns Max Rise/Fall Times With 3.3-nF Load
- 2.4-A Typical Output Current
- 4.5-V to 15-V Supply Voltage Range
- TTL-Compatible Inputs
- Internal Schottky Bootstrap Diode
- SYNC Control for Synchronous or Nonsynchronous Operation
- CROWBAR for OVP, Protects Against Faulted High-Side Power FETs
- Low Supply Current....3 mA Typical
- Ideal for High-Current Single or Multiphase Power Supplies
- –40°C to 125°C Operating Virtual Junction Temperature Range
- Available in SOIC and TSSOP PowerPAD Packages
PowerPAD is a trademark of Texas Instruments Incorporated.
The TPS2834 and TPS2835 are MOSFET drivers for synchronous-buck power stages. These devices are ideal for designing a high-performance power supply using switching controllers that do not include on-chip MOSFET drivers. The drivers are designed to deliver minimum 2-A peak currents into large capacitive loads. The high-side driver can be configured as ground-reference or as floating-bootstrap. An adaptive dead-time control circuit eliminates shoot-through currents through the main power FETs during switching transitions, and provides high efficiency for the buck regulator. The TPS2834 and TPS2835 have additional control functions: ENABLE, SYNC, and CROWBAR. Both high-side and low-side drivers are off when ENABLE is low. The driver is configured as a nonsynchronous-buck driver disabling the low-side driver when SYNC is low. The CROWBAR function turns on the low-side power FET, overriding the IN signal, for overvoltage protection against faulted high-side power FETs.
The TPS2834 has a noninverting input, while the TPS2835 has an inverting input. These drivers are available n 14-terminal SOIC and thermally enhanced TSSOP PowerPAD? packages and operate over a junction temperature range of ?40°C to 125°C.
