LTC1474IS8-3.3#PBF Switching Voltage Regulators 3.3V,Low IQ Stepdn DC/DC Conv
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | Analog Devices Inc. |
| Product Category: | Switching Voltage Regulators |
| RoHS: | Details |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-8 |
| Topology: | Buck |
| Output Voltage: | 3.3 V |
| Output Current: | 320 mA |
| Number of Outputs: | 1 Output |
| Input Voltage, Min: | 3 V |
| Input Voltage, Max: | 18 V |
| Quiescent Current: | 9 uA |
| Switching Frequency: | - |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 85 C |
| Series: | LTC1474 |
| Packaging: | Tube |
| Brand: | Analog Devices |
| Development Kit: | DC143A-A, DC143A-C |
| Height: | 1.75 mm |
| Input Voltage: | 10 V |
| Load Regulation: | 2 mV |
| Operating Supply Current: | 0.1 mA |
| Product Type: | Switching Voltage Regulators |
| Shutdown: | Shutdown |
| Factory Pack Quantity: | 100 |
| Subcategory: | PMIC - Power Management ICs |
| Type: | Step-Down Converter |
| Unit Weight: | 0.003527 oz |
♠ LTC1474/LTC1475 Low Quiescent Current High Efficiency Step-Down Converters
The LTC® 1474/LTC1475 series are high efficiency stepdown converters with internal P-channel MOSFET power switches that draw only 10µA typical DC supply current at no load while maintaining output voltage. The LTC1474 uses logic-controlled shutdown while the LTC1475 features pushbutton on/off.
The low supply current coupled with Burst ModeTM operation enables the LTC1474/LTC1475 to maintain high efficiency over a wide range of loads. These features, along with their capability of 100% duty cycle for low dropout and wide input supply range, make the LTC1474/LTC1475 ideal for moderate current (up to 300mA) battery-powered applications.
The peak switch current is user-programmable with an optional sense resistor (defaults to 325mA minimum if not used) providing a simple means for optimizing the design for lower current applications. The peak current control also provides short-circuit protection and excellent startup behavior. A low-battery detector that remains functional in shutdown is provided .
The LTC1474/LTC1475 series availability in 8-lead MSOP and SO packages and need for few additional components provide for a minimum area solution.
■ High Efficiency: Over 92% Possible
■ Very Low Standby Current: 10µA Typ
■ Available in Space Saving 8-Lead MSOP Package
■ Internal 1.4Ω Power Switch (VIN = 10V)
■ Wide VIN Range: 3V to 18V Operation
■ Very Low Dropout Operation: 100% Duty Cycle
■ Low-Battery Detector Functional During Shutdown
■ Programmable Current Limit with Optional Current Sense Resistor (10mA to 400mA Typ)
■ Short-Circuit Protection
■ Few External Components Required
■ Active Low Micropower Shutdown: IQ = 6µA Typ
■ Pushbutton On/Off (LTC1475 Only)
■ 3.3V, 5V and Adjustable Output Versions
■ Cellular Telephones and Wireless Modems
■ 4mA to 20mA Current Loop Step-Down Converter
■ Portable Instruments
■ Battery-Operated Digital Devices
■ Battery Chargers
■ Inverting Converters
■ Intrinsic Safety Applications
