SNVS617H
April 2009 – November 2014
LM25011
,
LM25011-Q1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Typical Application
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
Handling Ratings: LM25011
6.3
Handling Ratings: LM25011-Q1
6.4
Recommended Operating Conditions
6.5
Thermal Information
6.6
Electrical Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Control Circuit Overview
7.3.2
On-Time Timer
7.3.3
Current Limit
7.3.4
Ripple Requirements
7.3.5
N-Channel Buck Switch and Driver
7.3.6
Soft-Start
7.3.7
Power Good Output (PGD)
7.3.8
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Shutdown Function
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
LM25011 Example Circuit
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design with WEBENCH Tools
8.2.1.2.2
External Components
8.2.1.3
Application Curves
8.2.2
Output Ripple Control
8.2.2.1
Option A: Lowest Cost Configuration
8.2.2.2
Option B: Intermediate VOUT Ripple Configuration
8.2.2.3
Option C: Minimum VOUT Ripple Configuration
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Power Dissipation
11
Device and Documentation Support
11.1
Custom Design with WEBENCH Tools
11.2
Receiving Notification of Documentation Updates
11.3
Related Links
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DGQ|10
MPDS043F
Thermal pad, mechanical data (Package|Pins)
DGQ|10
PPTD275A
Orderable Information
snvs617h_oa
snvs617h_pm
6.7
Typical Characteristics
Figure 1.
Efficiency (Circuit of
Figure 19
)
Figure 3.
On-Time vs V
IN
and R
T
Figure 5.
Shutdown Current into VIN
Figure 7.
PGD Low Voltage vs Sink Current
Figure 9.
Current Limit Threshold vs Temperature
Figure 11.
VIN UVLO vs Temperature
Figure 13.
On-Time vs Temperature
Figure 2.
Efficiency at 2 MHz
Figure 4.
Voltage at the RT Pin
Figure 6.
Operating Current into VIN
Figure 8.
Reference Voltage vs Temperature
Figure 10.
Operating Current vs Temperature
Figure 12.
SS Pin Shutdown Threshold vs Temperature
Figure 14.
Minimum Off-Time vs Temperature