3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ
Product details
Parameters
Package | Pins | Size
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 and 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 (four 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
- Use TPSM265R1 module for faster time to market
- Create a custom regulator design using WEBENCH Power Designer
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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.
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
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download TIDA-010016 BOM Files.zip (86KB) -
download TIDA-010016 Assembly Files.zip (423KB) -
download TIDA-010016 Layer Plots.zip (1732KB) -
download TIDA-010016 CAD Files.zip (4189KB) -
download TIDA-010016 Gerber Files.zip (1112KB)
Design files
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download TIDA-010055 BOM Files.zip (310KB) -
download TIDA-010055 Assembly Files.zip (827KB) -
download TIDA-010055 Layer Plots.zip (2674KB) -
download TIDA-010055 CAD Files.zip (9038KB) -
download TIDA-010055 Gerber.zip (1157KB)
Design files
-
download TIDA-01463 BOM.pdf (75KB) -
download TIDA-01463 Assembly Drawing.pdf (331KB) -
download TIDA-01463 PCB.pdf (1416KB) -
download TIDA-01463 CAD Files.zip (2010KB) -
download TIDA-01463 Gerber.zip (544KB)
Design files
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download TIDA-01081 BOM.pdf (77KB) -
download TIDA-01081 Assembly Drawing.pdf (583KB) -
download TIDA-01081 PCB.pdf (3989KB) -
download TIDA-01081 CAD Files.zip (3673KB) -
download TIDA-01081 Gerber.zip (1282KB)
Design files
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download TIDA-01439 BOM.pdf (74KB) -
download TIDA-01439 Assembly Drawing.pdf (276KB) -
download TIDA-01439 PCB.pdf (1381KB) -
download TIDA-01439 CAD Files.zip (3036KB) -
download TIDA-01439 Gerber.zip (324KB)
Design files
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download TIDA-01415 BOM.pdf (102KB) -
download TIDA-01415 Assembly Drawing.pdf (375KB) -
download TIDA-01415 PCB.pdf (1781KB) -
download TIDA-01415 CAD Files.zip (2371KB) -
download TIDA-01415 Gerber.zip (336KB)
Design files
-
download TIDA-01478 BOM.pdf (55KB) -
download TIDA-01478 Assembly Drawing.pdf (75KB) -
download TIDA-01478 PCB.pdf (494KB) -
download TIDA-01478 CAD Files.zip (15783KB) -
download TIDA-01478 Gerber.zip (567KB)
Design files
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download TIDA-00666 BOM.pdf (76KB) -
download TIDA-00666 Assembly Drawing.pdf (374KB) -
download TIDA-00666 PCB.pdf (1907KB) -
download TIDA-00666 CAD Files.zip (1069KB) -
download TIDA-00666 Gerber.zip (464KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSON (DRC) | 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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