Overview
The L5970D is a step-down monolithic power switching regulator produced by STMicroelectronics. It is designed to deliver up to 1 A of output current at output voltages ranging from 1.2 V to 35 V. The device utilizes an internal P-Channel D-MOS transistor with a typical Rdson of 250 mΩ, which helps in minimizing the size of external components. An internal oscillator fixes the switching frequency at 250 kHz, making it suitable for applications requiring a stable and efficient power supply.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Topology | Buck | |
| Input Voltage | 4.4 V to 36 V | V |
| Output Current (Max) | 1 A | A |
| Output Voltage Range | 1.2 V to 35 V | V |
| Output Type | Adjustable | |
| Switching Frequency (Max) | 250 kHz | kHz |
| Operating Temp Range | -40°C to +150°C | °C |
| Duty Cycle (Max) | 100% | % |
| Efficiency | 90% | % |
| No. of Outputs | 1 | |
| Quiescent Current | 2.5 mA | mA |
| Storage Temperature Range | -55°C to +150°C | °C |
| Load Regulation | 15 mV | mV |
| Package Style | SOIC-8 | |
| Mounting Method | Surface Mount |
Key Features
- Up to 1 A output current
- Operating input voltage from 4.4 V to 36 V
- 3.3 V / (±2%) reference voltage
- Output voltage adjustable from 1.2 V to 35 V
- Low dropout operation: 100% duty cycle
- 250 kHz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Synchronization
- Protection against feedback disconnection
- Thermal shutdown
Applications
- Consumer: STB, DVD, TV, VCR, car radio, LCD monitors
- Networking: XDSL, modems, DC-DC modules
- Computer: printers, audio/graphic cards, optical storage, hard disk drive
- Industrial: chargers, car battery, DC-DC converters
Q & A
- What is the maximum output current of the L5970D?
The L5970D can deliver up to 1 A of output current.
- What is the input voltage range for the L5970D?
The input voltage range is from 4.4 V to 36 V.
- What is the adjustable output voltage range of the L5970D?
The output voltage can be adjusted from 1.2 V to 35 V.
- What is the switching frequency of the L5970D?
The switching frequency is internally fixed at 250 kHz.
- Does the L5970D have thermal shutdown protection?
- What is the typical Rdson of the internal P-Channel D-MOS transistor in the L5970D?
The typical Rdson is 250 mΩ.
- What is the quiescent current of the L5970D?
The quiescent current is 2.5 mA.
- What are the storage temperature range and operating temperature range for the L5970D?
The storage temperature range is -55°C to +150°C, and the operating temperature range is -40°C to +150°C.
- Does the L5970D support synchronization?
- What type of package does the L5970D come in?
The L5970D comes in an SOIC-8 package.
- What are some common applications for the L5970D?
