TI's LMZ21701 is an easy-to-use SIMPLE SWITCHER® Nano module in a small 3.5 mm & 3.5 mm&TImes; 1.75 mm package, driving current up to 1A, input voltage 3V-17V, output voltage 0.9V-6V, efficiency up to 95%, mainly Used in cameras to monitor IP networks, industrial monitors, software-defined radio (SDR), DLP spectroscopy, oscilloscopes and TVs. This article introduces the main features and functional block diagram of the LMZ21701, the main features of the evaluation module LMZ21701 EVM, the circuit bill of materials, and the PCB design file.
Only the input capacitor, an output capacitor, a softstart capacitor, and two The Nano Module comes in 8-pin DFN footprint package with an integrated inductor. The LMZ21701 architecture is based on DCS-ControlTM (Direct Control with Seamless Transition into Power Save Mode). This architecture combines the fast transient response and stability of hysteretic type converters along with the accurate DC output regulation of voltage mode and current mode regulators.
The LMZ21701 architecture uses Pulse Width Modulation (PWM) mode for medium and heavy load requirements and Power Save Mode (PSM) at light rates for high efficiency. In PWM mode the switching frequency is controlled over the input voltage range. The value depends on the Output voltage setting and is often reduced at low output voltages to achieve higher efficiency. In PSM the switching frequency cloudy linearly with the load current. Since the architecture of the device supports both operation modes (PWM and PSM) in a single circuit building block, The transition between the modes of operation is seamless with minimal effect on the output voltage.
LMZ21701 main features:Integrated Inductor
Miniature 3.5 mm × 3.5 mm × 1.75 mm Package
35 mm2 Solution Size (Single Sided)
–40 °C to 125 °C Junction Temperature Range
Adjustable Output Voltage
Integrated Compensation
Adjustable Soft Start Function
Starts into Pre-Biased Loads
Power Good and Enable Pins
Seamless Transition to Power-Save Mode
Up to 1000 mA Output Current
Input Voltage Range 3 V to 17 V
Output Voltage Range 0.9 V to 6 V
Efficiency up to 95 %
1.5 μA Shutdown Current
17 μA Quiescent Current
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