LM21212/15 High-Efficiency High-Current Buck Regulators

Texas Instruments' 12A and 15A Synchronous Buck Regulator from the PowerWise® Family

Texas Instruments' LM21212/15 High-Efficiency, High-Current Buck RegulatorsTexas Instruments introduces a pair of high-current, synchronous buck regulators with the industry’s highest efficiency at 97 percent. The LM21212-1 and LM21215 are well-suited for high-performance FPGAs, ASICs and microprocessors used in a variety of low-voltage applications including wireless, networking and optical communications infrastructure. Members of National’s PowerWise® energy-efficient product family, the LM21212-1 and LM21215 feature integrated high-side and low-side FETs, which simplify design and reduce solution size. The LM21212-1 features an output current up to 12A with synchronizable switching frequency and the LM21215 provides a resistor-programmable current limit, allowing up to 15 A of continuous output current, offering the industry’s best power density. Both products provide peak efficiency greater than 97 percent from a 5 V input to 3.3 V output, and greater than 92 percent efficiency when regulating a 1.2 V output from a 5 V input.

Features - LM21212-1
Features - LM21215
  • Integrated 7.0 mΩ high side and 4.3 mΩ low side
    FET switches
  • 300 kHz to 1.5 MHz frequency SYNC pin
  • Adjustable output voltage from 0.6 V to VIN
    (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95 V to 5.5 V
  • Startup into pre-biased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable pin with hysteresis
  • Integrated OVP, OCP, OTP, UVLO and Power-Good
  • Thermally enhanced eTSSOP-20 package
  • Integrated 7.0 mΩ high side and 4.3 mΩ low side FET switches
  • Adjustable current limit
  • Adjustable output voltage from 0.6 V to VIN
    (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95 V to 5.5 V
  • 500 kHz fixed switching frequency
  • Startup into pre-biased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable pin with hysteresis
  • Integrated OVP, OTP, UVLO and Power-Good
  • Thermally enhanced eTSSOP-20 package
Applications
  • Broadband, networking and wireless communications
  • High-performance FPGAs, ASICs and microprocessors
  • Simple to design, high efficiency point of load regulation from a 5 V or 3.3 V bus

High Current buck Regulators

ImageManufacturer Part NumberDescriptionAvailable Quantity
LM21212MH-1/NOPB datasheet linkIC REG BUCK ADJ 12A SYNC 20TSSOPLM21212MH-1/NOPBIC REG BUCK ADJ 12A SYNC 20TSSOP611 - Immediate
10001 - Factory Stock
LM21212MH-1/NOPB product page link
LM21215MH/NOPB datasheet linkIC REG BUCK ADJ 15A SYNC 20TSSOPLM21215MH/NOPBIC REG BUCK ADJ 15A SYNC 20TSSOP90 - Immediate
10001 - Factory Stock
LM21215MH/NOPB product page link
Published: 2010-04-27