LM5161PWPR
ActiveWIDE INPUT 4.5-V TO 100-V, 1-A SYNCHRONOUS BUCK / FLY-BUCK CONVERTER
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LM5161PWPR
ActiveWIDE INPUT 4.5-V TO 100-V, 1-A SYNCHRONOUS BUCK / FLY-BUCK CONVERTER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5161PWPR |
|---|---|
| Current - Output | 1 A |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 50 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive, Isolation Capable |
| Output Type | Adjustable |
| Package / Case | 14-PowerTSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 14-HTSSOP |
| Synchronous Rectifier | True |
| Voltage - Input (Max) [Max] | 100 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Max) | 92 V |
| Voltage - Output (Min/Fixed) [Min] | 2 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.66 | |
| 10 | $ 4.19 | |||
| 25 | $ 3.96 | |||
| 100 | $ 3.43 | |||
| 250 | $ 3.25 | |||
| 500 | $ 2.92 | |||
| 1000 | $ 2.46 | |||
| Digi-Reel® | 1 | $ 4.66 | ||
| 10 | $ 4.19 | |||
| 25 | $ 3.96 | |||
| 100 | $ 3.43 | |||
| 250 | $ 3.25 | |||
| 500 | $ 2.92 | |||
| 1000 | $ 2.46 | |||
| Tape & Reel (TR) | 2500 | $ 2.34 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.52 | |
| 100 | $ 3.08 | |||
| 250 | $ 2.16 | |||
| 1000 | $ 1.74 | |||
Description
General part information
LM5161-Q1 Series
The LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.
The LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.
Documents
Technical documentation and resources
