The LM20323 is a full featured 500kHz synchronous buck regulator capable of delivering upto 3A of load current. The current mode control loop is externally compensated with only twocomponents, offering both high performance and ease of use. The device is optimized to work overthe input voltage range of 4.5V to 36V making it well suited for high voltage systems.

The device features internal Over Voltage Protection (OVP) and Over Current Protection(OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allowsthe turn-on of the device to be tightly controlled and sequenced. Startup inrush currents arelimited by both an internally fixed and externally adjustable soft-start circuit. Fault detectionand supply sequencing are possible with the integrated power good (PGOOD) circuit.

The LM20323 is designed to work well in multi-rail power supply architectures. The outputvoltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If theoutput of the LM20323 is pre-biased at startup it will not sink current to pull the output lowuntil the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20323 is offered in an exposed pad 20-pin HTSSOP package that can be soldered tothe PCB, eliminating the need for bulky heatsinks.

  • 4.5V to 36V Input VoltageRange
  • 3A Output Current, 5.2A Peak Current
  • 130 m?/110 m?Integrated Power MOSFETs
  • 93% Peak Efficiency with SynchronousRectification
  • 1.5% Feedback Voltage Accuracy
  • Current ModeControl, Selectable Compensation
  • Fixed 500 kHz SwitchingFrequency
  • Adjustable Output Voltage Down to 0.8V
  • Compatiblewith Pre-biased Loads
  • Programmable Soft-start with ExternalCapacitor
  • Precision Enable Pin with Hysteresis
  • IntegratedOVP, UVLO, PGOOD
  • Internally Protected with Peak Current Limit, Thermal Shutdownand Restart
  • Accurate Current Limit Minimizes InductorSize
  • Non-linear Current Mode Slope Compensation
  • 20-Pin HTSSOP Exposed Pad Package

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Part number立即下单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)FeaturesControl modeDuty cycle(Max)(%)Operating temperature range(C)Package GroupRatingTypePackage size: mm2:W x L (PKG)
LM20323立即下单4.5 4.5  36 36  0.8 0.8  32 32  3 3  1 1  500 500  500 500  2.3 2.3  Enable
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking Enable
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking  
Current Mode Current Mode  80 80  -40 to 125 -40 to 125  HTSSOP | 20 HTSSOP | 20  Catalog Catalog  Converter Converter  20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20) 20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)  
LM20323立即下单4.5 4.5  36 36  0.8 0.8  32 32  3 3  1 1  500 500  500 500  2.3 2.3  Enable
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking Enable
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking  
Current Mode Current Mode  80 80  -40 to 125 -40 to 125  HTSSOP | 20 HTSSOP | 20  Catalog Catalog  Converter Converter  20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20) 20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)  
LM3100立即下单4.5  36  0.8  7  1.5  1  200  1000  1  Enable
Over Current Protection
Synchronous Rectification
Tracking  
COT with emulated ripple  94  -40 to 125  HTSSOP | 20  Catalog  Converter  20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)  
LM3102立即下单4.5  42  0.8  7  2.5  1  200  1000  1  Enable
Over Current Protection
Synchronous Rectification
Tracking  
COT with emulated ripple  94  -40 to 125  DSBGA|28
HTSSOP|20  
Catalog  Converter  See datasheet (DSBGA)
20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP|20)  
LM3102-Q1立即下单4.5  42  0.8  7  2.5  1  200  1000  1  Enable
Over Current Protection
Synchronous Rectification  
COT with emulated ripple  94  -40 to 125  HTSSOP | 20  Automotive  Converter  20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)  
LM3103立即下单4.5  42  0.6  7  0.75  1  200  1000  1  Enable
Pre-Bias Start-Up
Over Current Protection
Synchronous Rectification
Tracking  
COT with emulated ripple  94  -40 to 125  HTSSOP | 16  Catalog  Converter  16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)  

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