LM21215 2.95-5.5V, 15A, Voltage Mode Synchronous Buck Regulator with Adjustable Frequency | TI.com

LM21215 (ACTIVE) 2.95-5.5V, 15A, Voltage Mode Synchronous Buck Regulator with Adjustable Frequency

 

Recommended alternative parts

  • LM21215A  -  5.5V, 15A Converter with Frequency Synchronization

Description

The LM21215 is a monolithic synchronous point of load buck regulator that is capable of delivering up to 15 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

The LM21215 features internal overvoltage protection (OVP) and resistor-programmable overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.

The LM21215 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. If the output is prebiased at start-up, it will not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.

Features

  • Integrated 7-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
  • Start-up Into Prebiased 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 20-Pin HTSSOP Exposed Pad Package
  • Create a custom design using the LM21215 with the WEBENCH® Power Designer

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WEBENCH® Designer LM21215

  Min   Max Range
Vin  V 2.95 to 5.5V
Vout  V 0.6 to 5.4V
Iout  A ≤ 15A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
LM21215 Order now 2.95     5.5     0.6     5.5     15     1     500     500     1.5     Adjustable Current Limit
Enable
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Voltage Mode     100     -40 to 125     Catalog     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM21212-1 Samples not available 2.95     5.5     0.6     5.5     12     1     300     1500     1.5     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Voltage Mode     100     -40 to 125     Catalog     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM21212-2 Samples not available 2.95     5.5     0.6     5.5     12     1     300     1500     1.5     Enable
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Voltage Mode     100     -40 to 125     Catalog     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM21215A Samples not available 2.95     5.5     0.6     5.5     15     1     300     1500     1.5     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Voltage Mode     100     -40 to 125     Catalog     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)