SNVS239C October 2004 – October 2015 LM3475
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Setting Output Voltage
- 8.2.2.2 Setting Operating Frequency and Output Ripple
- 8.2.2.3 Using a Feed-forward Capacitor
- 8.2.2.4 Inductor Selection
- 8.2.2.5 Output Capacitor Selection
- 8.2.2.6 Input Capacitor Selection
- 8.2.2.7 Diode Selection
- 8.2.2.8 P-Channel MOSFET Selection
- 8.2.2.9 Reducing Switching Noise
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
1 Features
2 Applications
- TFT Monitor
- Auto PC
- Vehicle Security
- Navigation Systems
- Notebook Standby Supply
- Battery Powered Portable Applications
- Distributed Power Systems
3 Description
The LM3475 is a hysteretic P-FET buck controller designed to support a wide range of high efficiency applications in a very small SOT-23-5 package. The hysteretic control scheme has several advantages, including simple system design with no external compensation, stable operation with a wide range of components, and extremely fast transient response. Hysteretic control also provides high efficiency operation, even at light loads. The PFET architecture allows for low component count as well as 100% duty cycle and ultra-low dropout operation.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM3475 | SOT-23 (5) | 1.60 mm × 2.90 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application
