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LM2619 Datasheet(PDF) 2 Page - Texas Instruments |
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LM2619 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 21 page SGND D2 EN A2 A3 B3 C3 D3 A1 B1 C1 D1 VDD PVIN SW PGND FB EAOUT EANEG SYNC/ MODE SGND D2 VDD PVIN SW PGND FB EAOUT EANEG SYNC/ MODE EN A1 B1 C1 D1 A3 B3 C3 D3 A2 10PH PWM/PFM FB EN VDD PVIN EAOUT EANEG SGND PGND SW ON/OFF 22.1k 680pF 22PF VIN 2.8V to 5.5V SYNC/ MODE LM2619 V OU T 1.5V 10PF LM2619 SNVS212B – NOVEMBER 2002 – REVISED MAY 2013 www.ti.com Figure 3. Typical Circuit for 1.5-V Output Voltage Connection Diagrams 10-Bump DSBGA Package Figure 4. YPA Package Top View Figure 5. YPA Package Bottom View Pin Functions Table 1. Pin Description Pin No. Pin Name Function A1 FB Feedback Analog Input. B1 EANEG Inverting input of error amplifier. C1 EAOUT Output of error amplifier. D1 SYNC/MODE Synchronization Input. Use this digital input for frequency selection or modulation control. Set: SYNC/MODE = high for low-noise 600kHz PWM mode SYNC/MODE = low for low-current PFM mode SYNC/MODE = a 500kHz–1MHz external clock for synchronization in PWM mode. (See OPERATING MODE SELECTION and FREQUENCY SYNCHRONIZATION in Device Information.) D2 EN Enable Input. Set this Schmitt trigger digital input high for normal operation. For shutdown, set low. Set EN low during system power-up and other low supply voltage conditions. (See SHUTDOWN MODE in Device Information.) D3 PGND Power Ground. C3 SW Switching Node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an inductor with a saturation current rating that exceeds the max Switch Peak Current Limit of the LM2619. B3 PVIN Power Supply Voltage Input to the internal PFET switch. Connect to the input filter capacitor. A3 VDD Analog Supply Input. If board layout is not optimum, an optional 0.1µF ceramic capacitor is suggested. A2 SGND Analog and Control Ground. 2 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LM2619 |
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