LTC3421EUF#TRPBF
ActiveDC-DC SWITCHING SYNCHRONOUS BOOST REGULATOR, ADJUSTABLE, 0.5 TO 4.5 V IN, 2.25 TO 5.25V/1.5A OUT
LTC3421EUF#TRPBF
ActiveDC-DC SWITCHING SYNCHRONOUS BOOST REGULATOR, ADJUSTABLE, 0.5 TO 4.5 V IN, 2.25 TO 5.25V/1.5A OUT
Description
General part information
LTC3421 Series
The LTC3421 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The device includes a 0.10Ω N-channel MOSFET switch and a 0.14Ω P-channel synchronous rectifier. This product has the ability to simply program the output voltage, switching frequency, current limit, soft-start, Burst Mode threshold and loop compensation with external passive components.Quiescent current is only 12µA during Burst Mode operation, maximizing battery life in portable applications. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin. An open-drain uncommitted low-battery comparator is included. The part maintains operation in applications with a secondary cell powering the output voltage during shutdown.Other features include: 1µA shutdown, anti-ringing control, thermal limit and reference output.The LTC3421 is available in a small 4mm × 4mm QFN package.ApplicationsHandheld ComputersCordless PhonesGPS ReceiversBattery Backup Supplies
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3421EUF#TRPBF |
|---|---|
| Current - Output | 1 A |
| Frequency - Switching (Max) | 3 MHz |
| Frequency - Switching (Min) | 100 kHz |
| Function | Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 24-WFQFN Exposed Pad |
| Package Length | 4 mm |
| Package Name | 24-QFN |
| Package Width | 4 mm |
| Synchronous Rectifier | No |
| Topology | Boost |
| Voltage - Input (Max) | 4.5 V |
| Voltage - Input (Min) | 0.5 V |
| Voltage - Output (Max) | 5.25 V |
| Voltage - Output (Min/Fixed) | 2.4 V |
Pricing
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