TPS40195PWR
Active4.5-V TO 20-V, 20-A, SYNCHRONOUS BUCK CONTROLLER WITH POWER GOOD AND SYNCHRONIZATION
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TPS40195PWR
Active4.5-V TO 20-V, 20-A, SYNCHRONOUS BUCK CONTROLLER WITH POWER GOOD AND SYNCHRONIZATION
Technical Specifications
Parameters and characteristics for this part
| Specification | TPS40195PWR |
|---|---|
| Clock Sync | True |
| Control Features | Current Limit, Power Good, Soft Start, Frequency Control, Enable |
| Frequency - Switching [Max] | 600 kHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 16-TSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 16-TSSOP |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 20 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.01 | |
| 10 | $ 1.80 | |||
| 25 | $ 1.70 | |||
| 100 | $ 1.45 | |||
| 250 | $ 1.36 | |||
| 500 | $ 1.20 | |||
| Digi-Reel® | 1 | $ 2.01 | ||
| 10 | $ 1.80 | |||
| 25 | $ 1.70 | |||
| 100 | $ 1.45 | |||
| 250 | $ 1.36 | |||
| 500 | $ 1.20 | |||
| Tape & Reel (TR) | 2000 | $ 1.20 | ||
| Texas Instruments | LARGE T&R | 1 | $ 2.13 | |
| 100 | $ 1.86 | |||
| 250 | $ 1.31 | |||
| 1000 | $ 1.05 | |||
Description
General part information
TPS40195 Series
The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.
The threshold is set with a single external resistor connected from ILIM to GND. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.
The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.
Documents
Technical documentation and resources
