See datasheet for actual packaging/pinout drawings


Package | PIN:

DRC | 10


S (-40 to 150)

ECO Plan:

Green (RoHS & no Sb/Br)


3V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq

TI Store Price:

1 - 9 $ 4.09
10 - 24 $ 3.65
25 - 99 $ 3.29
100 - 249 $ 3.00
250 - 499 $ 2.70
500 - 749 $ 2.31
750 - 999 $ 1.97
1000 - 9999 $ 1.66

Adjust your quantity during checkout

Texas Instruments LM5166DRCT

The LM5166 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 500 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 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/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 LM5166 is available in a VSON-10 package with 0.5-mm pin pitch. To create a custom regulator design, use the LM5166 with WEBENCH®Power Designer.

View datasheet
View product folder
Order SummaryEdit >
Subtotal: $0.00
Shipping & Handling: -
Total (USD): $0.00