LM25145RGYR
| Parameters | |
|---|---|
| Factory Lead Time | 1 Week |
| Lifecycle Status | ACTIVE (Last Updated: 3 days ago) |
| Mounting Type | Surface Mount, Wettable Flank |
| Package / Case | 20-VFQFN Exposed Pad |
| Surface Mount | YES |
| Number of Pins | 20 |
| Operating Temperature | -40°C~125°C TJ |
| Packaging | Tape & Reel (TR) |
| JESD-609 Code | e3 |
| Pbfree Code | yes |
| Part Status | Active |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| Number of Terminations | 20 |
| Terminal Finish | Matte Tin (Sn) |
| Additional Feature | ADJUSTABLE OUTPUT VOLTAGE FROM 0.8 V TO 40 V |
| Terminal Position | QUAD |
| Terminal Form | NO LEAD |
| Peak Reflow Temperature (Cel) | 260 |
| Terminal Pitch | 0.5mm |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Base Part Number | LM25145 |
| Function | Step-Down |
| Number of Outputs | 1 |
| Output Type | Transistor Driver |
| Input Voltage-Nom | 24V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Output Configuration | Positive |
| Voltage - Supply (Vcc/Vdd) | 6V~42V |
| Control Features | Enable, Frequency Control, Ramp, Soft Start |
| Input Voltage (Min) | 6V |
| Topology | Buck |
| Control Mode | VOLTAGE-MODE |
| Frequency - Switching | 100kHz~1MHz |
| Input Voltage (Max) | 42V |
| Control Technique | PULSE WIDTH MODULATION |
| Synchronous Rectifier | Yes |
| Height | 1mm |
| Length | 4.5mm |
| Width | 3.5mm |
| Thickness | 900μm |
| RoHS Status | ROHS3 Compliant |
Description
The 42-V synchronous buck controller LM25145RGYR is designed to regulate from a high input voltage source or an input rail prone to high voltage transients, reducing the requirement for extra surge suppression components. Large step-down ratios are enabled by a high-side switch minimum on-time of 40 ns, allowing direct step-down conversion from a 24 V nominal input to low-voltage rails for decreased system complexity and solution cost. The LM25145RGYR can operate at nearly 100% duty cycle during input voltage dips as low as 6 V, making it ideal for high-performance industrial control, robotics, datacom, and RF power amplifier applications.
A user-selectable diode emulation function minimizes current consumption at light-load settings, while forced-PWM (FPWM) operation eliminates frequency variation to reduce EMI. Overcurrent protection is achieved by detecting the voltage drop across the low-side MOSFET or by employing an optional current sense resistor on a cycle-by-cycle basis. To reduce beat frequencies in noise-sensitive applications, the configurable switching frequency of up to 1 MHz can be synchronized to an external clock source.
Features
? Precision Enable Input and Open-Drain Power Good Indicator for Sequencing and Control
? Inherent Protection Features for Robust Design
– Hiccup Mode Overcurrent Protection
– Input UVLO With Hysteresis
– VCC and Gate Drive UVLO Protection
– Thermal Shutdown Protection With Hysteresis
? VQFN-20 Package With Wettable Flanks
? Create a Custom Design Using the LM25145 With WEBENCH? Power Designer
? 40-ns Minimum On-Time for High VIN / VOUT Ratio
? 140-ns Minimum Off-Time for Low Dropout
? 0.8-V Reference With ±1% Feedback Accuracy
? 7.5-V Gate Drivers for Standard VTH MOSFETs
– 14-ns Adaptive Dead-Time Control
– 2.3-A Source and 3.5-A Sink Capability
– Low-Side Soft-Start for Prebiased Start-Up
? Adjustable Soft-Start or Optional Voltage Tracking
? Fast Line and Load Transient Response
– Voltage-Mode Control With Line Feedforward
– High Gain-Bandwidth Error Amplifier
? Versatile Synchronous Buck DC-DC Controller
– Wide Input Voltage Range of 6 V to 42 V
– Adjustable Output Voltage From 0.8 V to 40 V
? Meets EN55022 / CISPR 22 EMI Standards
? Lossless RDS(on) or Shunt Current Sensing
? Switching Frequency From 100 kHz to 1 MHz
– SYNC In and SYNC Out Capability
Applications
? Telecom Infrastructure
? Factory Automation
? Test and Measurement
? Industrial Motor Drives
? RF Power Amplifier Applications
