Linear Technology LT1938
The LT1938’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). The LT1938 is available in a 3mm × 3mm DFN package with Exposed Pad for low thermal resistance.| Part No. | LT1938 |
|---|---|
| Datasheet | LT1938 Download |
| Manufacturer |  Linear Technology |
| Description | Step-Down Switching Regulator |
| Buy | Stock & Price |
FEATURES
● Wide Input Voltage Range: 3.6V to 25V● 2.2A Maximum Output Current
● Adjustable Switching Frequency: 300kHz to 2.8MHz
● Low Shutdown Current: IQ < 1µA
● Integrated Boost Diode
● Power Good Flag
● Saturating Switch Design: 0.18Ω On-Resistance
● 1.265V Feedback Reference Voltage
● Output Voltage: 1.265V to 20V
● Soft-Start Capability
● Small 10-Pin Thermally Enhanced (3mm × 3mm) DFN Package
APPLICATIONS
● Automotive Battery Regulation● Power for Portable Products
● Distributed Supply Regulation
● Industrial Supplies
● Wall Transformer Regulation LT1938 25V, 2.2A, 2.8MHz Step-Down Switching Regulator
DESCRIPTION
The LT®1938 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 25V. A high efficiency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. A power...
