LM5165 3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ | TI.com

LM5165 (ACTIVE)

3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ

3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ - LM5165
 

Description

The LM5165 device is a compact, easy-to-use, 3-V to 65-V, ultra-low IQ synchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 150-mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V or at an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse Frequency Modulation (PFM) mode is selected for optimal light-load efficiency or Constant On-Time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.

The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular output current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5165 buck converter is available in a 10-pin, 3-mm × 3-mm, thermally-enhanced VSON-10 package with 0.5-mm pin pitch.

Features

  • Wide Input Voltage Range of 3 V to 65 V
  • 10.5-µA No-Load Quiescent Current
  • –40°C to 150°C Junction Temperature Range
  • Fixed (3.3-V, 5-V) or Adjustable Output Voltages
  • Meets EN55022 / CISPR 22 EMI Standards
  • Integrated 2-Ω PMOS Buck Switch
    • Supports 100% Duty Cycle for Low Dropout
  • Integrated 1-Ω NMOS Synchronous Rectifier
    • Eliminates External Rectifier Diode
  • Programmable Current Limit Setpoint (4 Levels)
  • Selectable PFM or COT Mode Operation
  • 1.223-V ±1% Internal Voltage Reference
  • 900-µs Internal or Programmable Soft Start
  • Active Slew Rate Control for Low EMI
  • Diode Emulation Mode and Pulse Skipping for Ultra-High Light-Load Efficiency Performance
  • Monotonic Start-Up into Prebiased Output
  • No Loop Compensation or Bootstrap Components
  • Precision Enable and Input UVLO With Hysteresis
  • Pin-to-pin Compatible With the LM5166
  • Thermal Shutdown Protection With Hysteresis
  • 10-Pin, 3-mm × 3-mm VSON Package
  • Create a Custom Regulator Design Using WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (integrated switch)

 
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
LM5165 LM46000 LM5009 LM5165-Q1 LM5166 LMR16006 LMR36006 LMR36015 TPS54061 TPS54061-Q1 TPS54062
3     3.5     9.5     3     3     4     4.2     4.2     4.7     4.7     4.7    
65     60     95     65     65     60     60     60     60     60     60    
1.23     1     2.5     1.23     1.23     0.8     1     1     0.8     0.8     0.8    
65     28     85     65     65     55     57     57     58     58     58    
0.15     0.5     0.15     0.15     0.5     0.6     0.6     1.5     0.2     0.2     0.05    
1     1     1     1     1     1     1     1     1     1     1    
50     200     50     50     50     700     1000     400     50     50     100    
600     2200     600     600     600     2100     2100     1000     1100     1100     400    
0.01     0.024     0.485     0.01     0.01     0.028     0.023     0.023     0.09     0.09     0.089    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable     Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
Constant on-time (COT)     Current Mode     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
100     99     99