ZHCSMU1G October 2020 – May 2024 LMR43610-Q1 , LMR43620-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Device Comparison Table
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Enable, Start-Up, and Shutdown
- 7.3.2 External CLK SYNC (with MODE/SYNC)
- 7.3.3 Adjustable Switching Frequency (with RT)
- 7.3.4 Power-Good Output Operation
- 7.3.5 Internal LDO, VCC, and VOUT/FB Input
- 7.3.6 Bootstrap Voltage and VBOOT-UVLO (BOOT Terminal)
- 7.3.7 Output Voltage Selection
- 7.3.8 Spread Spectrum
- 7.3.9 Soft Start and Recovery from Dropout
- 7.3.10 Current Limit and Short Circuit
- 7.3.11 Thermal Shutdown
- 7.3.12 Input Supply Current
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2 Detailed Design Procedure
- 8.2.3 Application Curves
- 8.3 Best Design Practices
- 8.4 Power Supply Recommendations
- 8.5 Layout
- 9 Device and Documentation Support
- 10Revision History
- 11Mechanical, Packaging, and Orderable Information
8.2.3 Application Curves
Unless otherwise specified the following conditions apply: VIN = 12V, TA = 25°C.
| VIN = 13.5V | VOUT = 3.3V | fSW = 2.2MHz |
| Load = 2A |
| VIN = 13.5V | VOUT = 3.3V | fSW = 2.2MHz |
| Load = 2A |
| VIN = 13.5V | VOUT = 3.3V | fSW = 2.2MHz |
| Load = 2A |
| VIN = 13.5V | VOUT = 3.3V | fSW = 2.2MHz |
| Load = 2A |
| Ferrite Bead Part Number: FBMH3225HM601NT | Alternate Ferrite Bead Part Number: FBMH3225HM102N |
A. The RT pin is
factory-set for externally adjustable switching frequency RT variants only.
Tying this pin to GND results in 2.2MHz switching frequency. See Section 7.3.3 for details.
B. The MODE/SYNC pin is factory-set for fixed frequency MODE/SYNC variants only. Tying this pin to GND results in auto mode. See Section 7.3.2 for details.
Figure 8-30 Example Application CircuitTable 8-5 BOM for Typical Application Curves
| U1 | ?SW | VOUT | L | NOMINAL COUT (RATED CAPACITANCE) | RFBT | RFBB | CFF |
|---|---|---|---|---|---|---|---|
| LMR43620MSC3RPERQ1 | 2200kHz | 3.3V Fixed | 3.3μH, 26mΩ | 2 × 22μF | 0Ω | DNP | DNP |
| LMR43610MSC5RPERQ1 | 2200kHz | 5V Fixed | 3.3μH, 26mΩ | 2 × 22μF | 0Ω | DNP | DNP |
| LMR43610RS3QRPERQ1 | 1000kHz | 3.3V Fixed | 3.3μH, 26mΩ | 2 × 22μF | 0Ω | DNP | DNP |
| LMR43610RS3QRPERQ1 | 400kHz | 3.3V Fixed | 10μH, 18.5mΩ | 2 × 22μF | 0Ω | DNP | DNP |