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

LM5165 (ACTIVE)

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

 

Description

The LM5165 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 an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance 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/adjustable startup timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start via an external capacitor. An open-drain PGOOD indicator can be used for sequencing and output voltage monitoring. The LM5165 is qualified to automotive AEC-Q100 grade 1 and is available in a VSON-10 package with 0.5-mm pin pitch.

Features

  • Wide Input Voltage Range of 3 V to 65 V
  • Fixed (3.3 V, 5 V) or Adjustable Output Voltages
  • Maximum Output Current as High as 150 mA
  • 10.5-µA No Load Quiescent Current
  • –40°C to 150°C Junction Temperature Range
  • Selectable PFM or COT Mode Operation
  • Switching Frequency as High as 600 kHz
  • Diode Emulation Mode and Pulse Skipping for
    Ultra-High Light-Load Efficiency Performance
  • 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)
  • 1.223-V Internal Voltage Reference
  • 900-µs Internal or Programmable Soft Start
  • Monotonic Startup into Pre-Biased Output
  • No Loop Compensation or Bootstrap Components
  • Precision Enable/Input UVLO with Hysteresis
  • Open-Drain Power Good Indicator
  • Active Slew Rate Control for Low EMI
  • Thermal Shutdown Protection with Hysteresis
  • 10-Lead, 3-mm × 3-mm VSON Package

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Parametrics Compare all products in Buck Converter (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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM5165 LM5165X LM5165Y LM25011 LM25011-Q1 LM25019 LM5009 LM5017 LM5018 LM5165-Q1 LM5166 TPS54061 TPS54061-Q1 TPS54062
3    3    3    6    6    7.5    9.5    7.5    7.5    3    3    4.7    4.7    4.7   
65    65    65    42    42    48    95    100    100    65    65    60    60    60   
1.23    5    3.3    2.51    2.51    1.25    2.5    1.25    1.25    1.23    1.23    0.8    0.8    0.8   
65    5    3.3    40    40    40    85    90    90    65    65    58    58    58   
0.15    0.15    0.15    2    2    0.1    0.15    0.65    0.3    0.15    0.5    0.2    0.2    0.05   
1    1    1    1    1    1    1    1    1    1    1    1    1    1   
50    50    50    50    50    50    50    50    50    50    50    50    50    100   
600    600    600    2000    2000    1000    600    1000    1000    600    600    1100    1100    400   
0.01    0.01    0.01    1.2    1.2    1.75    0.485    1.75    1.75    0.01    0.01    0.09    0.09    0.089   
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   
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit    Adjustable Current Limit    Synchronous Rectification
UVLO Adjustable   
Enable    Synchronous Rectification
UVLO Adjustable   
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable   
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)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Current Mode    Current Mode    Current Mode   
100    100    100    99    99    90    99    90    90    100    100    98    98    98   
-40 to 150    -40 to 150    -40 to 150    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Automotive    Catalog    Catalog    Catalog    Catalog    Automotive    Catalog    Catalog    Automotive    Catalog   
VSON    VSON    VSON    MSOP-PowerPAD    MSOP-PowerPAD    SO PowerPAD
WSON   
VSSOP
WSON   
SO PowerPAD
WSON   
SO PowerPAD
WSON   
VSON    VSON    SON    SON    SON
VSSOP   

Other qualified versions of LM5165

Version Part Number Definition
Automotive LM5165-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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WEBENCH® Designer LM5165

  Min   Max Range
Vin  V 3.0 to 65.0V
Vout  V 1.223 to 60V
Iout  A ≤ 0.15A
Ambient Temp  °C -40 to 125°C


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