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Texas Instruments LM3489MM | Demoboard USB-C-PD-DUO-EVM
Hysteretic PFET Buck Controller with Enable Pin
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-35 V |
| Output 1 | 35 V |
Description
The LM3489 device is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost-effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated enable pin provides a shutdown mode drawing only 7 µA. Leaving the enable pin unconnected defaults to on.Current limit protection can be implemented by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. A sense resistor may be used to improve current limit accuracy if desired. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.
Features
- Qualified for Automotive Parts
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C5
- Easy-to-Use Control Methodology
- No Control Loop Compensation Required
- Wide 4.5-V to 35-V Input Range
- 1.239 V to VIN Adjustable Output Range
- High Efficiency: 93%
- ±1.3% (±2% Over Temperature) Internal Reference
- 100% Duty Cycle Operation
- Maximum Operation Frequency > 1 MHz
- Current Limit Protection
- Dedicated Enable Pin (on if Unconnected)
- Shutdown Mode Draws Only 7-µA Supply Current
- 8-Pin VSSOP Package
Typical applications
- Battery-Powered Portable Applications, Distributed Power Systems, Always-On Power
- Automotive
- High-Power LED Drivers
- Set-Top Boxes, DSL or Cable Modems, PC/IA, Auto PCs, TFT Monitors
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | Packaging | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC max. (mΩ) | fres (MHz) | Mount | Application | Interface Type | Type | Gender | Pins | PCB Thickness (mm) | IR (mA) | Working Voltage (V (DC)) | Color | H (mm) | Operation Force (g) | Electrical Life (Cycles) | Actuator Color | Washable | Vaporphase process | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060GS75000 | SPEC | 26 files RAY files
| Active i| Production is active. Expected lifetime: >10 years. | WL-SMCW SMT Mono-color Chip LED Waterclear | 525 | Green | 515 | 430 | 3.2 | InGaN | 140 | – | – | – | 0603 | -40 °C up to +85 °C | – | – | – | 1.6 | 0.8 | – | Tape and Reel | – | – | – | – | – | – | SMT | – | – | – | – | – | – | – | – | – | 0.7 | – | – | – | – | – | ||
 | 74437324100 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LHMI SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | 4020 | -40 °C up to +125 °C | – | – | – | 4.45 | 4.06 | – | – | 10 | 1.95 | 1.5 | 3.15 | 243 | 23 | SMT | – | – | – | – | 2 | – | – | – | – | 1.8 | – | – | – | – | – | ||
| 885012205037 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | 100 nF | ±10% | 16 | 0402 | -55 °C up to +125 °C | 5 | 5 GΩ | X7R Class II | 1 | 0.5 | 0.25 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0.5 | – | – | – | – | – | |||
 | 434121025816 | SPEC | – | 5 files | Active i| Production is active. Expected lifetime: >10 years. | WS-TASV SMT Tact Switch 6.0x3.8 mm | – | – | – | – | – | – | – | – | – | 12 | – | -40 °C up to +85 °C | – | 100 MΩ | – | – | – | – | Tape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 2.5 | 160 | 50000 | Black | No | not specified | |
 | 632723300011 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-USB Type C Connectors | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | – | – | – | Tape and Reel | – | – | – | – | – | – | THR | USB 3.1 | Type C | Horizontal | Receptacle | 24 | 1.6 | 5000 | 48 | – | – | – | – | – | – | – | |
 | 60900213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Jumper | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | 1000 MΩ | – | 2.44 | – | – | Bag | – | – | – | – | – | – | – | – | – | – | Jumper | 1 | – | 3000 | 250 | Black | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 150060GS75000 | SPEC | |
| 74437324100 | SPEC | |
| 885012205037 | SPEC | ||
| 434121025816 | SPEC | – |
| 632723300011 | SPEC | – |
| 60900213421 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | Packaging | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC max. (mΩ) | fres (MHz) | Mount | Application | Interface Type | Type | Gender | Pins | PCB Thickness (mm) | IR (mA) | Working Voltage (V (DC)) | Color | H (mm) | Operation Force (g) | Electrical Life (Cycles) | Actuator Color | Washable | Vaporphase process | Samples |
|---|
