SNVS118F december 1999 – may 2023 LM2594 , LM2594HV
PRODUCTION DATA
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Description (continued)
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Electrical Characteristics – 3.3 V
- 7.6 Electrical Characteristics – 5 V
- 7.7 Electrical Characteristics – 12 V
- 7.8 Electrical Characteristics – Adjustable
- 7.9 Electrical Characteristics – All Output Voltage Versions
- 7.10 Typical Characteristics
- 8 Detailed Description
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
9.2.2.2.2 Inductor Selection (L1)
- Calculate the inductor Volt microsecond constant E × T (V × μs) with Equation 4.
Equation 4.
where
- VSAT = internal switch saturation voltage = 0.9 V
- VD = diode forward voltage drop = 0.5 V
- Calculate the inductor Volt ? microsecond constant (E × T) with Equation 5.
Equation 5.
- Use the E × T value from the previous formula and match it with the E × T number on the vertical axis of the Inductor Value Selection Guide shown in Figure 9-8.
Equation 6. E × T = 35.2 (V × μs)
- On the horizontal axis, select the maximum load current: ILOAD(max) = 0.5 A
- Identify the inductance region intersected by the E × T value and the maximum load current value. Each region is identified by an inductance value and an inductor code (LXX).
From the inductor value selection guide shown in Figure 9-8, the inductance region intersected by the 35 (V × μs) horizontal line and the 0.5-A vertical line is 150 μH, and the inductor code is L19.
- Select an appropriate inductor from the four manufacturer's part numbers listed in Table 9-3.
From Table 9-3, locate line L19, and select an inductor part number from the list of manufacturers' part numbers.