Overview
The L5970D is a step-down monolithic power switching regulator designed by STMicroelectronics. It is capable of delivering up to 1A of output current at output voltages ranging from 1.2V to 35V. This regulator is particularly suited for applications requiring high efficiency and reliability, such as consumer electronics, networking devices, and industrial equipment.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Input Voltage | 4.4 | 36 | V | |
| Output Current | 1 | A | ||
| Output Voltage Range | 1.2 | 35 | V | |
| Switching Frequency | 212 | 250 | 280 | KHz |
| Mosfet On Resistance | 0.250 | 0.5 | Ω | |
| Maximum Junction Temperature | 150 | °C | ||
| Power Dissipation at TA ≤ 60°C | 0.75 | W |
Key Features
- Up to 1A output current
- Operating input voltage from 4.4V to 36V
- 3.3V (±2%) reference voltage
- Output voltage adjustable from 1.2V to 35V
- Low dropout operation: 100% duty cycle
- 250KHz internally fixed frequency
- Voltage feedforward and zero load current operation
- Internal current limiting and inhibit for zero current consumption
- Synchronization and protection against feedback disconnection
- Thermal shutdown
Applications
- Consumer electronics: STB, DVD, TV, VCR, car radio, LCD monitors
- Networking: XDSL, modems, DC-DC modules
- Computer peripherals: printers, audio/graphic cards, optical storage, hard disk drive
- Industrial applications: chargers, car battery, DC-DC converters
Q & A
- What is the maximum output current of the L5970D?
The L5970D can deliver up to 1A of output current. - What is the operating input voltage range of the L5970D?
The operating input voltage range is from 4.4V to 36V. - What is the adjustable output voltage range of the L5970D?
The output voltage can be adjusted from 1.2V to 35V. - What is the switching frequency of the L5970D?
The switching frequency is internally fixed at 250KHz. - Does the L5970D have thermal shutdown protection?
Yes, the L5970D includes thermal shutdown protection. - How does the inhibit function work on the L5970D?
The inhibit function disables the device when the INH pin is set high (above 2.2V); if not used, the pin must be grounded. - What is the typical on-resistance of the Mosfet in the L5970D?
The typical on-resistance of the Mosfet is 0.250 Ω. - Can the L5970D operate in synchronization with other regulators?
Yes, the L5970D has a synchronization feature. - What is the maximum junction temperature for the L5970D?
The maximum junction temperature is 150°C. - What type of package is the L5970D available in?
The L5970D is available in an SO-8 package.
