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LP3971 Datasheet(PDF) 33 Page - Texas Instruments |
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LP3971 Datasheet(HTML) 33 Page - Texas Instruments |
33 / 52 page LP3971 www.ti.com SNVS432V – JANUARY 2006 – REVISED MAY 2013 BUCK FUNCTION REGISTER (BFR) 8H'38 DEFINITIONS Bit Access Name Description 7:3 — — Reserved SHBU Shut down Back up battery to prevent battery drain during shipping 0 = Back up Battery Enabled 1 = Back up Battery Disabled 1 R BK_SLOMOD Buck Spread Spectrum Modulation Buck 1–3 0 = 10 kHz triangular wave spread spectrum modulation 1 = 2 kHz triangular wave spread spectrum modulation 0 R BK_SSEN Spread spectrum function Buck 1–3 0 = SS Output Disabled 1 = SS Output Enabled LDO2–LDO1 VOLTAGE CONTROL REGISTER (L21VCR) 8H'39 Bit 7 6 5 4 3 2 1 0 Designation LDO 2 Output Voltage (L20V)** LDO 1 Output Voltage (L1OV)** Reset Value 1** 1** 0** 0** 1** 1** 0** 0** LDO2–LDO1 VOLTAGE CONTROL REGISTER (L21VCR) 8H'39 DEFINITIONS Bit Access Name Description 7:4 R/W L2OV Data Code Output Voltage 4h'0 1.8 4h'1 1.9 4h'2 2.0 4h'3 2.1 4h'4 2.2 4h'5 2.3 4h'6 2.4 4h'7 2.5 4h'8 2.6 4h'9 2.7 4h'A 2.8 4h'B 2.9 4h'C 3.0 4h'D 3.1 4h'E 3.2 4h'F 3.3 Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 33 Product Folder Links: LP3971 |
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