Overview
The LMZ21700 Nano Module, produced by Texas Instruments, is a compact and efficient step-down DC/DC converter designed for space-constrained applications. This module is capable of driving up to 650 mA of load current and operates within an input voltage range of 3 V to 17 V, with an output voltage range of 0.9 V to 6 V. The LMZ21700 features an innovative MicroSiP™ package, integrating a synchronous buck converter IC and a power inductor within an FR-4 laminate substrate, resulting in a small solution size of 3.5 mm × 3.5 mm × 1.75 mm. It requires only a few external components for basic operation, including an input capacitor, an output capacitor, a soft-start capacitor, and two resistors.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3 | - | 17 | V |
| Output Voltage Range | 0.9 | - | 6 | V |
| Output Current | - | - | 650 | mA |
| Junction Temperature Range | -40 | - | 125 | °C |
| Efficiency | - | up to 95% | - | % |
| Shutdown Current | - | 1.5 | - | μA |
| Quiescent Current | - | 17 | - | μA |
| Package Size | - | - | 3.50 mm × 3.50 mm × 1.75 mm | - |
Key Features
- Adjustable output voltage and soft-start function
- Integrated compensation and seamless transition to power-save mode
- Power good and enable pins for sequencing and control
- Input undervoltage lockout (UVLO) and thermal protection
- Supports PWM mode for medium and heavy loads and power-save mode for light loads
- High efficiency up to 95%
- Compact MicroSiP™ package with integrated inductor
- Operating junction temperature range of -40°C to 125°C
Applications
- Point of load conversions from 3.3-V, 5-V, or 12-V input voltage
- Space-constrained applications requiring high efficiency and compact design
- LDO replacement in applications needing higher current and better efficiency
Q & A
- What is the input voltage range of the LMZ21700?
The input voltage range of the LMZ21700 is from 3 V to 17 V.
- What is the maximum output current of the LMZ21700?
The LMZ21700 can drive up to 650 mA of load current.
- What is the package size of the LMZ21700?
The LMZ21700 comes in a 3.50 mm × 3.50 mm × 1.75 mm MicroSiP™ package.
- Does the LMZ21700 support adjustable output voltage?
- What are the key features of the LMZ21700's power management?
The LMZ21700 features PWM mode for medium and heavy loads, power-save mode for light loads, input undervoltage lockout, and thermal protection.
- How does the soft-start function work on the LMZ21700?
The soft-start function is controlled by an external capacitor connected to the SS pin, which sets the internal voltage reference ramp time.
- What is the purpose of the Power Good (PG) pin on the LMZ21700?
The Power Good (PG) pin is used for sequencing of multiple rails and indicates when the output voltage is ready.
- Can the LMZ21700 be used in high-temperature environments?
- How efficient is the LMZ21700?
The LMZ21700 has an efficiency of up to 95%.
- What tools can be used to design and optimize the LMZ21700?
The WEBENCH® Power Designer tool can be used to create a custom design, select components, run electrical simulations, and optimize the design for specific performance.
