Summary of XD9260/61 – 1.5A HI-SAT COT SYNCHRONOUS STEP-DOWN DC/DC CONVERTER
The XD9260/XD9261 series are 1.5A synchronous step-down DC/DC converters featuring Torex's Hi-SAT COT control for stable frequency and fast transient response. They operate between 2.7V and 5.5V input, offering output voltages from 0.8V to 3.6V with selectable frequencies of 1.2MHz or 3.0MHz. Designed for automotive applications (AEC-Q100), these chips minimize external components using a small USP-6C package and low-value inductors while maintaining ultra-low quiescent current.
Parts used in the XD9260/XD9261 Converter:
- XD9260 or XD9261 IC
- USP-6C Package (2.0 x 1.8 mm)
- Inductor (1.0 µH)
XD9260/61 – 1.5A Hi-SAT COT Synchronous Step-Down DC/DC Converter, AEC-Q100 compliant
The XD9260/XD9261 series is a small 1.5A synchronous step-down DC/DC converter with high-speed transient response and low quiescent current. The extremely fast load transient performance is a result of Torex’s innovative Hi-SAT COT (Constant On-Time) control method, which, when compared to standard Constant On-Time (COT) control, provides less fluctuation in oscillation frequency against load and input voltage.
The input voltage range is 2.7V to 5.5V and the output voltage range is 0.8V to 3.6V (accuracy ±2.0%). 1.2MHz or 3.0MHz can be selected for the oscillation frequency and the operating ambient temperature range is -40°C ~ 105°C.
The XD9260 operates with Hi-SAT COT plus fixed PWM mode with fixed switching frequency whereas the XC9261 automatically changes between PWM and PFM (pulse-skipping) mode to maximise efficiency at lighter loads.
The soft-start time is set to 0.3ms (TYP.). With the built-in UVLO function, the driver transistor is forced OFF when the input voltage becomes 2.0V or lower.
Key Features
- Input Voltage from 2.7 V to 5.5 V
- Output Voltage from 0.8 V to 3.6 V in 0.05 V increments
- Up to 1.5 A Output Current
- Low Quiescent Current, only 15 µA (1.2 MHz)
- AEC-Q100 qualified (-40 ˚C ~ +105 ˚C)
Key Benefits
- Space Saving Solution
- Ultra-Small USP-6C Package (2.0 x 1.8 mm)
- Small-Value Inductor (1.0 µH)
- Minimized External Component Count
- Ultra-Low IQ and High Efficiency at Light Load Conditions
- 15.0 µA in Sleep Mode
- 0.1 µA in Shutdown Mode
- Hi-SAT COT Control
- Ultra-Fast Transient Response
- Stable Switching Frequency
Read more: XD9260/61 – 1.5A HI-SAT COT SYNCHRONOUS STEP-DOWN DC/DC CONVERTER
- What is the maximum output current?
The device provides up to 1.5 A output current. - Can the oscillation frequency be selected?
Yes, users can select either 1.2 MHz or 3.0 MHz. - How does the XD9261 improve efficiency at light loads?
It automatically switches between PWM and PFM modes to maximize efficiency. - What is the minimum input voltage required?
The input voltage range starts at 2.7 V. - Does the chip have built-in protection against low input voltage?
Yes, it includes a UVLO function that forces the driver transistor OFF when input drops to 2.0 V or lower. - What is the soft-start time for this converter?
The soft-start time is set to 0.3 ms typically. - Is this component suitable for harsh temperature environments?
Yes, it operates within an ambient temperature range of -40°C to +105°C. - What is the quiescent current at 1.2 MHz operation?
The low quiescent current is only 15 µA at 1.2 MHz.
