1.8-V to 28-V, synchronous D-CAP buck contoller with light load efficiency
Product details
Parameters
Package | Pins | Size
Features
- High Efficiency, Low Power Consumption, 4.5-µA
Typical Shutdown Current - Fixed Frequency Emulated On-Time Control,
Adjustable from 100 kHz to 550 kHz - D-CAP™ Mode With 100-ns Load Step Response
- < 1% Initial Reference Accuracy
- Output Voltage Range: 0.75 V to 5.5 V
- Wide Input Voltage Range: 1.8 V to 28 V
- Selectable Auto-Skip/PWM-Only Operation
- Temperature Compensated (4500 ppm/°C)
Low-Side RDS(on) Overcurrent Sensing - Negative Overcurrent Limit
- Integrated Boost Diode
- Integrated OVP/UVP and Thermal Shutdown
- Powergood Signal
- Internal 1.2-ms Voltage Soft-Start
- Integrated Output Discharge (Soft-Stop)
- APPLICATIONS
- Notebook Computers
- I/O Supplies
- System Power Supplies
All other trademarks are the property of their respective owners
Description
The TPS51117 device is a cost-effective, synchronous buck controller for POL voltage regulation in notebook PC applications. The controller is dedicated for the operation of the Adaptive On-Time D-CAP mode. This mode provides ease-of-use, low external component count, and fast transient response. Auto-skip mode for high efficiency down to the milliampere load range, or PWM-only mode for low-noise operation is selectable.
The current-sensing scheme for positive overcurrent and negative overcurrent protection is loss-less low-side RDS(on) sensing plus temperature compensation. The device receives a 5-V (4.5 V to 5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.
The TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified from –40°C to 85°C.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | TPS51117 Single Synchronous Step-Down Controller datasheet (Rev. C) | May 15, 2015 |
| Technical article | Embedded Computers with TI Power in a myriad of applications | May 15, 2010 | |
| User guide | High Performance Synchronous Buck EVM Using the TPS51117 (Rev. A) | Apr. 01, 2009 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 14 | View options |
| VQFN (RGY) | 14 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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