LM5177 Series

60-V wide VIN synchronous 4-switch buck-boost controller with bidirectional operation

Catalog

60-V wide VIN synchronous 4-switch buck-boost controller with bidirectional operation

Part	Output Phases	Output Configuration	Output Type	Function	Clock Sync	Control Features	Package / Case	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Duty Cycle (Max) [Max]	Synchronous Rectifier	Number of Outputs	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Supplier Device Package	Frequency - Switching [Min]	Frequency - Switching [Max]	Topology	Mounting Type
Texas Instruments LM5177DCPR	1	Positive	Transistor Driver	Step-Up/Step-Down		Dead Time Control Enable Power Good Power on Reset Soft Start	0.173 in 4.4 mm	38-PowerTFSOP	150 °C	-40 °C	100 %		1	3.5 V	78 V	38-HTSSOP	100 kHz	2 MHz	Buck-Boost	Surface Mount

Catalog

60-V wide VIN synchronous 4-switch buck-boost controller with bidirectional operation

Key Features

• Wide input range from 3.5V to 60V (85V absolute maximum)Minimum 2.8V when V(BIAS) > 3.5VOutput voltage from 3.3V to 60VLow shutdown IQ of 3µALow operating IQ of 60µA3% reverse current limit accuracy for precise charging currentsAverage input and output current monitor or limiterDynamic output voltage tracking for PWM or analog input signalsPower save mode (PSM) selectable for high light load efficiencyTwo integrated high-voltage supply LDOs with automatic selection2A peak current logic level gate driverIntegrated bootstrap diodeBootstrap overvoltage and undervoltage protectionFixed frequency across all operating modes (boost, buck-boost, buck)Forced PWM mode selectableSwitching up to 600kHz for small solution and component sizeExternal clock synchronizationSpread spectrum operation selectableAdjustable undervoltage protectionHiccup overcurrent and short protectionWide input range from 3.5V to 60V (85V absolute maximum)Minimum 2.8V when V(BIAS) > 3.5VOutput voltage from 3.3V to 60VLow shutdown IQ of 3µALow operating IQ of 60µA3% reverse current limit accuracy for precise charging currentsAverage input and output current monitor or limiterDynamic output voltage tracking for PWM or analog input signalsPower save mode (PSM) selectable for high light load efficiencyTwo integrated high-voltage supply LDOs with automatic selection2A peak current logic level gate driverIntegrated bootstrap diodeBootstrap overvoltage and undervoltage protectionFixed frequency across all operating modes (boost, buck-boost, buck)Forced PWM mode selectableSwitching up to 600kHz for small solution and component sizeExternal clock synchronizationSpread spectrum operation selectableAdjustable undervoltage protectionHiccup overcurrent and short protection

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). 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).