Datasheet Texas Instruments LM27402
| Manufacturer | Texas Instruments |
| Series | LM27402 |
3-20V, Voltage Mode Synchronous Buck Controller with DCR Current Sensing
Datasheets
LM27402 High-Performance Synchronous Buck Controller With DCR Current Sensing datasheet
PDF, 2.9 Mb, Revision: J, File published: Jul 31, 2015
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Prices
Status
| LM27402MH/NOPB | LM27402MHX/NOPB | LM27402SQ/NOPB | LM27402SQX/NOPB | |
|---|---|---|---|---|
| Lifecycle Status | Active (Recommended for new designs) | Active (Recommended for new designs) | Active (Recommended for new designs) | Active (Recommended for new designs) |
| Manufacture's Sample Availability | No | No | Yes | Yes |
Packaging
| LM27402MH/NOPB | LM27402MHX/NOPB | LM27402SQ/NOPB | LM27402SQX/NOPB | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Pin | 16 | 16 | 16 | 16 |
| Package Type | PWP | PWP | RUM | RUM |
| Industry STD Term | HTSSOP | HTSSOP | WQFN | WQFN |
| JEDEC Code | R-PDSO-G | R-PDSO-G | S-PQFP-N | S-PQFP-N |
| Package QTY | 92 | 2500 | 1000 | 4500 |
| Carrier | TUBE | LARGE T&R | SMALL T&R | LARGE T&R |
| Device Marking | L27402 | L27402 | 27402S | 27402S |
| Width (mm) | 4.4 | 4.4 | 4 | 4 |
| Length (mm) | 5 | 5 | 4 | 4 |
| Thickness (mm) | 1 | 1 | .75 | .75 |
| Pitch (mm) | .65 | .65 | .65 | .65 |
| Max Height (mm) | 1.2 | 1.2 | .8 | .8 |
| Mechanical Data | Download | Download | Download | Download |
Parametrics
| Parameters / Models | LM27402MH/NOPB | LM27402MHX/NOPB | LM27402SQ/NOPB | LM27402SQX/NOPB |
|---|---|---|---|---|
| Control Mode | Voltage Mode | Voltage Mode | Voltage Mode | Voltage Mode |
| Duty Cycle(Max), % | 95 | 95 | 95 | 95 |
| Iout(Max), A | 30 | 30 | 30 | 30 |
| Iq(Typ), mA | 4.5 | 4.5 | 4.5 | 4.5 |
| Number of Phases | 1 | 1 | 1 | 1 |
| Operating Temperature Range, C | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| Package Group | HTSSOP | HTSSOP | WQFN | WQFN |
| Rating | Catalog | Catalog | Catalog | Catalog |
| Regulated Outputs | 1 | 1 | 1 | 1 |
| Special Features | Enable,Frequency Synchronization,Power Good,Pre-Bias Start-Up,Synchronous Rectification,Tracking | Enable,Frequency Synchronization,Power Good,Pre-Bias Start-Up,Synchronous Rectification,Tracking | Enable,Frequency Synchronization,Power Good,Pre-Bias Start-Up,Synchronous Rectification,Tracking | Enable,Frequency Synchronization,Power Good,Pre-Bias Start-Up,Synchronous Rectification,Tracking |
| Switching Frequency(Max), kHz | 1200 | 1200 | 1200 | 1200 |
| Switching Frequency(Min), kHz | 200 | 200 | 200 | 200 |
| Type | Controller | Controller | Controller | Controller |
| Vin(Max), V | 20 | 20 | 20 | 20 |
| Vin(Min), V | 3 | 3 | 3 | 3 |
| Vout(Max), V | 18.6 | 18.6 | 18.6 | 18.6 |
| Vout(Min), V | 0.6 | 0.6 | 0.6 | 0.6 |
Eco Plan
| LM27402MH/NOPB | LM27402MHX/NOPB | LM27402SQ/NOPB | LM27402SQX/NOPB | |
|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant |
Application Notes
- AN-2060 LM27402 Current Limit Application Circuits (Rev. A)PDF, 89 Kb, Revision: A, File published: May 6, 2013
Sensing the inductor DCR voltage can be an accurate and lossless technique of obtaining current information in DC/DC regulators. The absence of a series current sense resistor permits high current and high efficiency designs at a lower cost and higher density. Inductor DCR sensing also allows continuous monitoring of the inductor current as opposed to MOSFET RDS(ON) sensing that usually samples th - Reduce buck-converter EMI and voltage stress by minimizing inductive parasiticsPDF, 926 Kb, File published: Jul 21, 2016
Model Line
Series: LM27402 (4)
Manufacturer's Classification
- Semiconductors> Power Management> Non-isolated DC/DC Switching Regulator> Step-Down (Buck)> Buck Controller (External Switch)
