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LM26480 Datasheet(PDF) 1 Page - Texas Instruments |
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LM26480 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 42 page LM26480 LDO1_FB VOUTLDO2 GND_L VOUTLDO1 ENLDO1 LDO2_FB VIN1 SW1 FB1 VINLDO2 SW2 FB2 VIN2 GND_SW2 10 µF ENSW1 2.2 µH ENSW2 GND_SW1 VINLDO1 SYNC nPOR ENLDO2 GND_C AVDD VINLDO12 R1 R2 0.47 µF 0.47 µF 1 µF R2 R1 1 µF 10 µF R2 C2 C1 R1 R1 10 µF 2.2 µH 10 µF 1 µF R2 C1 C2 1 µF 100 k DAP Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM26480 SNVS543K – JANUARY 2008 – REVISED JANUARY 2015 LM26480 Externally Programmable Dual High-Current Step-Down DC-DC and Dual Linear Regulators 1 Features 2 Applications 1 • Input Voltage: 2.8 V to 5.5 V • Core Digital Power • Compatible with Advanced Applications • Applications Processors Processors and FPGAs • Peripheral I/O Power • Two LDOs for Powering Internal Processor 3 Description Functions and I/Os The LM26480 is a multi-functional Power • Precision Internal Reference Management Unit, optimized for low-power digital • Thermal Overload Protection applications. This device integrates two highly • Current Overload Protection efficient 1.5-A step-down DC-DC converters and two • External Power-On-Reset Function for Buck1 and 300-mA linear regulators. Buck2 Device Information(1) • Undervoltage Lockout Detector to Monitor Input PART NUMBER PACKAGE BODY SIZE (NOM) Supply Voltage LM26480 WQFN (24) 4.00 mm x 4.00 mm • Step-Down DC-DC Converter (Buck) (1) For all available packages, see the orderable addendum at – 1.5-A Output Current the end of the datasheet. – VOUT from: space – Buck1 : 0.8 V to 2 V at 1.5 A space – Buck2 : 1 V to 3.3 V at 1.5 A space – Up to 96% efficiency – ±3% FB voltage accuracy space – 2-MHz PWM switching frequency Simplified Schematic – PWM-to-PFM Automatic Mode Change under Low Loads – Automatic Soft Start • Linear Regulators (LDO) – VOUT of 1 V to 3.5 V – ±3% FB Voltage Accuracy – 300-mA Output Current – 25-mV (typ) Dropout 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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