Product Summary

The TPS40009DGQR is a low-voltage, non-isolated synchronous buck regulator. It drives an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the TPS40009DGQR controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI’s proprietary Predictive Gate Driver technology.

Parametrics

TPS40009DGQR absolute maximum ratings: (1)Input voltage range, VIN BOOT: VSW + 6.5 V; (2)Input voltage range, VIN COMP, FB, ILIM, SS/SD: 0.3 to 6.5 V; (3)Input voltage range, VIN SW: 3 to 10.5 V; (4)Input voltage range, VIN SWT (SW transient < 50 ns): 5 V; (5)Input voltage range, VIN VDD: 6.5 V; (6)Operating junction temperature range, TJ: 40 to 150℃; (7)Storage temperature, Tstg: 55 to 150℃; (8)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: 260℃.

Features

TPS40009DGQR features: (1)Operating Input Voltage 2.25 V to 5.5 V; (2)Output Voltage as Low as 0.7 V; (3)1% Internal 0.7 V Reference; (4)Predictive Gate Drive N-Channel MOSFET Drivers for Higher Efficiency; (5)Externally Adjustable Soft-Start and Overcurrent Limit; (6)Fixed-Frequency Voltage-Mode Control TPS40009, 600 kHz; (7)Source/Sink with VOUT Prebias; (8)10-Lead MSOP PowerPad Package for Higher Performance Thermal Shutdown; (9)Internal Boostrap Diode.

Diagrams

TPS40009DGQR block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
TPS40009DGQR
TPS40009DGQR
Texas Instruments
DC/DC Switching Controllers Low Input Sync Buck src/sink w/prebias
Data Sheet
0-1: $1.66
1-25: $1.34
25-100: $1.22
100-250: $1.10
TPS40009DGQRG4
TPS40009DGQRG4
Texas Instruments
DC/DC Switching Controllers Low Input Sync Buck src/sink w/prebias
Data Sheet
0-1970: $0.76
1970-2500: $0.76