Model No: LMR38025SDRRR
Texas Instruments LMR38025SDRRR
Manufacturer: Texas Instruments
SEMICON NO.: LMR38025SDRRR
Package: 12-WFDFN
Stock: In stock
Description: Buck Switching Regulator Positive 1 Output
SEMICON NO.: LMR38025SDRRR
Package: 12-WFDFN
Stock: In stock
Description: Buck Switching Regulator Positive 1 Output
Quantity :
| Mfr | Texas Instruments |
| Device Type | Synchronous Step-Down (Buck) Switching Regulator |
| Functional Safety | Functional Safety-Capable |
| Input Voltage (VIN) | 4.2 V to 80 V |
| Absolute Max Input Voltage | 85 V |
| Output Configuration | Positive |
| Topology | Buck (Step-Down) |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Output Voltage | 1 V to 75 V |
| Output Current (Max) | 2.5 A |
| Synchronous Rectification | Yes |
| Quiescent Current (Iq) | 40 µA (Typ) |
| Operating Temperature | -40°C to +150°C |
| Package | 12-WFDFN |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
The LMR38025SDRRR is a Texas Instruments SIMPLE SWITCHER® 4.2 V to 80 V input, 2.5 A synchronous step-down (buck) DC/DC converter featuring a pseudo-random spread spectrum for EMI reduction and an ultra-low 40 µA operating quiescent current. Housed in a compact 12-pin WSON package with PowerPAD™ and wettable flanks, it integrates a high-voltage enable pin, a precision ±1.5% reference voltage, internal compensation, and a power-good flag with built-in filtering. Designed for rugged industrial and MHEV/EV applications, it supports a 200 kHz to 2.2 MHz adjustable switching frequency, frequency synchronization, PFM and forced PWM modes, pre-biased output start-up, and comprehensive protection circuitry.
Key Features & Benefits
● Wide 4.2 V to 80 V Input Range: Minimizes external surge suppression components and supports operation during input voltage dips as low as 4.2 V at nearly 100% duty cycle, making it well-suited for wide-input industrial and MHEV/EV systems.
● Ultra-Low 40 µA Quiescent Current: Reduces standby power consumption, ideal for battery-powered or always-on applications.
● Adjustable Switching Frequency (200 kHz to 2.2 MHz): Enables optimization between efficiency at low frequencies and smaller solution size at high frequencies, with the ability to avoid noise-sensitive frequency bands.
● Pseudo-Random Spread Spectrum: Lowers peak EMI emissions, simplifying compliance with electromagnetic compatibility standards.
● Power-Good Flag with Built-In Filtering and Delay: Provides a true indication of system status, eliminating the need for an external supervisor IC.
● Integrated Synchronous Rectification: Eliminates the need for an external Schottky diode, improving efficiency and reducing BOM count.
● Precision Enable with High-Voltage Capability: Supports direct connection to wide input supply voltage or precise UVLO control across start-up and shutdown.
● Comprehensive Protection Suite: Includes cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown for robust operation under fault conditions.
Frequently Asked Questions
Q: Can the switching frequency be adjusted to optimize efficiency or size?
A: Yes, the frequency is programmable via the RT pin between 200 kHz and 2.2 MHz, allowing designers to prioritize either high efficiency (low frequency) or compact magnetics (high frequency).
Q: What is the maximum absolute input voltage rating?
A:The absolute maximum input voltage is 85 V, providing adequate margin above the 80 V operating maximum for transient immunity.
● Wide 4.2 V to 80 V Input Range: Minimizes external surge suppression components and supports operation during input voltage dips as low as 4.2 V at nearly 100% duty cycle, making it well-suited for wide-input industrial and MHEV/EV systems.
● Ultra-Low 40 µA Quiescent Current: Reduces standby power consumption, ideal for battery-powered or always-on applications.
● Adjustable Switching Frequency (200 kHz to 2.2 MHz): Enables optimization between efficiency at low frequencies and smaller solution size at high frequencies, with the ability to avoid noise-sensitive frequency bands.
● Pseudo-Random Spread Spectrum: Lowers peak EMI emissions, simplifying compliance with electromagnetic compatibility standards.
● Power-Good Flag with Built-In Filtering and Delay: Provides a true indication of system status, eliminating the need for an external supervisor IC.
● Integrated Synchronous Rectification: Eliminates the need for an external Schottky diode, improving efficiency and reducing BOM count.
● Precision Enable with High-Voltage Capability: Supports direct connection to wide input supply voltage or precise UVLO control across start-up and shutdown.
● Comprehensive Protection Suite: Includes cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown for robust operation under fault conditions.
Frequently Asked Questions
Q: Can the switching frequency be adjusted to optimize efficiency or size?
A: Yes, the frequency is programmable via the RT pin between 200 kHz and 2.2 MHz, allowing designers to prioritize either high efficiency (low frequency) or compact magnetics (high frequency).
Q: What is the maximum absolute input voltage rating?
A:The absolute maximum input voltage is 85 V, providing adequate margin above the 80 V operating maximum for transient immunity.
Recommended Alternative buck converters
1. LMR38020 — A smaller 2 A output version in the same SIMPLE SWITCHER family, ideal for lighter loads requiring the same 4.2 V to 80 V input range and spread spectrum features.
2. LMR36503 — A lower-voltage (65 V max) 3 A automotive buck converter in a miniature 2×2 mm HotRod™ package, suited for space-constrained designs.
3. LMR51430 — A 30 V input, 3 A synchronous buck converter with an internally set 1.1 MHz switching frequency, offering a simpler design for lower-voltage applications.
4. TPSM82903SISR — A 3 A power module (integrated inductor) in a 17 V input range, providing a compact, easy-to-deploy alternative when discrete inductor selection is undesired.
1. LMR38020 — A smaller 2 A output version in the same SIMPLE SWITCHER family, ideal for lighter loads requiring the same 4.2 V to 80 V input range and spread spectrum features.
2. LMR36503 — A lower-voltage (65 V max) 3 A automotive buck converter in a miniature 2×2 mm HotRod™ package, suited for space-constrained designs.
3. LMR51430 — A 30 V input, 3 A synchronous buck converter with an internally set 1.1 MHz switching frequency, offering a simpler design for lower-voltage applications.
4. TPSM82903SISR — A 3 A power module (integrated inductor) in a 17 V input range, providing a compact, easy-to-deploy alternative when discrete inductor selection is undesired.
