TPS40009DGQRG4

Switching Frequency :
Output Current :
Duty Cycle (Max) :
Number of Outputs : 1
Maximum Operating Temperature : + 85 C
Mounting Style : SMD/SMT
Input Voltage : 2.25 V to 5.5 V
Output Voltage : 0.7 V to 4 V
Package / Case : HTSSOP-10


Pinout




Description

The TPS40009DGQRG4 is one member of the TPS40009 series.The TPS4000x are controllers for low-voltage,non-isolated synchronous buck regulators. These controllers drive 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 device 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 Drive technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated.

Features of the TPS40009DGQRG4 are:(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)source/sink with vout prebias; (7)10-lead MSOP powerpad package for higher performance; (8)thermal shutdown; (9)internal boostrap diode.

The absolute maximum ratings of the TPS40009DGQRG4 can be summarized as:(1)input voltage range Vin SW:-3 to 10.5V;(2)input voltage range Vin SWT:-5V;(3)lead temperature:260;(4)storage temperature:-55 to 150;(5)operating junction temperature:-40 to 150.Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.The TPS4000x supports pre-biased Vout voltage applications. In cases, where the Vout voltage is held up by a pre-biasing supply while the controller is off, full synchronous rectification is disabled during the initial phase of soft starting the Vout voltage. When the first PWM pulses are detected during soft-start, the controller slowly activates synchronous rectification by starting the first LDRV pulses with a narrow on-time. It then increments that on-time on a cycle-by-cycle basis until it coincides with the time dictated by (1-D), where D is the duty cycle of the converter.

Parameters:

Technical/Catalog Information	TPS40009DGQRG4
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	2.25 ~ 5.5 V
Voltage - Output	0.7 ~ 4 V
Current - Output	15A
Power - Output	-
Package / Case	10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
Packaging	Tape & Reel (TR)
Internal Switch(s)	No
Synchronous	Yes
Rds (On)	-
Operating Temperature	-40°C ~ 85°C
Frequency - Switching	600kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TPS40009DGQRG4 TPS40009DGQRG4