Automotive, 3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ
Product details
Parameters
Package | Pins | Size
Features
- AEC-Q100 Qualified for Automotive Applications
- Device Temperature Grade 1: –40ºC to 125ºC Ambient Temperature Range
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C5
- 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
- Active Slew Rate Control for Low EMI
- 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 Start-Up into Prebiased Output
- No Loop Compensation or Bootstrap Components
- Precision Enable and Input UVLO With Hysteresis
- Thermal Shutdown Protection With Hysteresis
- 10-Pin VSON and VSSOP Packages
- Create a Custom Regulator Design Using WEBENCH® Power Designer
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Description
The LM5165-Q1 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 either 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 10-pin VSON and VSSOP packages with 0.5-mm pin pitch.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Tightly-regulated output voltage of 5 V with 2% setpoint accuracy
- Wide input voltage operating range of 3 V to 65 V
- Ultra-high power conversion efficiency: >90% at 5 V ouptut voltage and 150 mA load
- No-load supply current as low as 12 μA
- Fully assembled, tested and proven PCB layout with 15.5-mm x (...)
Description
The LM5165EVM-HD-P50A high density evaluation module (EVM) is designed to showcase the performance of the LM5165 high performance, exceptionally small, synchronous buck DC/DC buck converter with ultralow IQ. The module-style design is packaged in a miniature footprint with low component count. It (...)
Features
- Tightly-regulated output voltage of 5 V with 2% setpoint accuracy, adjustable from 1.223 V to VIN
- Wide input voltage operating range of 3 V to 65 V
- Ultra-high power conversion efficiency: >90% at an output of 5 V and above 1 mA load (input voltage 12 V)
- No-load supply current as low as 12 μA
- Fully (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Determine filter inductance and input and output filter capacitances for a given operating mode (PFM or COT)
- Optimize the design using efficiency and solution size as key performance metrics
- Select components for soft-start, input UVLO, output voltage setpoint, current limit and switching frequency
- (...)
Reference designs
Design files
-
download PMP22270 BOM.pdf (137KB) -
download PMP22270 Assembly Drawing.pdf (174KB) -
download PMP22270 PCB.pdf (961KB) -
download PMP22270 CAD Files.zip (1352KB) -
download PMP22270 Gerber.zip (701KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| VSON (DRC) | 10 | View options |
| VSSOP (DGS) | 10 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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