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LM5177DCPR Datasheet(PDF) 1 Page - Texas Instruments |
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LM5177DCPR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 60 page  LM5177 60V Wide VIN Bidirectional 4-Switch Buck-Boost Controller 1 Features • Wide input range from 3.5V to 60V (85V absolute maximum) – Minimum 2.8V when V(BIAS) > 3.5V • Output voltage from 3.3V to 60V • Low shutdown IQ of 3μA • Low operating IQ of 60μA • 3% reverse current limit accuracy for precise charging currents • Average input and output current monitor or limiter • Dynamic output voltage tracking for PWM or analog input signals • Power save mode (PSM) selectable for high light load efficiency • Two integrated high-voltage supply LDOs with automatic selection • 2A peak current logic level gate driver – Integrated bootstrap diode – Bootstrap overvoltage and undervoltage protection • Fixed frequency across all operating modes (boost, buck-boost, buck) – Forced PWM mode selectable – Switching up to 600kHz for small solution and component size – External clock synchronization • Spread spectrum operation selectable • Adjustable undervoltage protection • Hiccup overcurrent and short protection 2 Applications • Non-isolated DC/DC supply (merchant DC/DC, remote radio unit, motor drive control) • Backup power systems (battery backup, fire safety) • Industrial PC (single board computer) • Medical PSU (oxygen concentrator) • Power over ethernet (router) • Solar power (solar charge controller) 3 Description The LM5177 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. The LM5177 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM5177. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV). Package Information Part Number Package (1) Body Size (NOM) LM5177 DCP038 9.7mm × 4.4mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Input Voltage (V) 6 8 10 12 14 16 18 20 22 24 26 28 30 32 90 91 92 93 94 95 96 97 98 99 100 10 D002 V(VIN) falling V(VIN) rising Efficiency vs Input Voltage (IO = 4.5A) nFLT SYNC MODE CFG SLO PE DTRK nFLT SYNC MODE CFG SLO PE DTRK HO1 LO1 VCC LO2 HO2 HB2 SW2 PGND HO1 LO1 VCC LO2 HO2 HB2 SW2 PGND nFLT SYNC MODE CFG SLO PE DTRK HO1 LO1 VCC LO2 HO2 HB2 SW2 PGND HO2 HO2 LO2 VOUT SW1 VCC VCC VOUT VIN VIN LO2 SW2 SW1 VBIAS VBIAS VIN VIN SW2 Simplified Schematic LM5177 SNVSBU4F – JUNE 2022 – REVISED JANUARY 2025 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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