LM51561H Series

2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup

Catalog

2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup

Part	Topology	Frequency - Switching [Min]	Frequency - Switching [Max]	Output Phases	Supplier Device Package	Output Configuration	Control Features	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Mounting Type	Synchronous Rectifier	Clock Sync	Output Type	Package / Case	Function	Duty Cycle (Max) [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Grade	Package / Case [y]	Package / Case [x]	Qualification
Texas Instruments LM51561DSSR	Boost Flyback SEPIC	100 kHz	2.2 MHz	1	12-WSON (3x2)	Positive	Current Limit Enable Frequency Control Power Good Soft Start	-40 °C	125 ¯C	1	Surface Mount			Transistor Driver	12-WFDFN Exposed Pad	Step-Up Step-Up/Step-Down	93 %	60 V	2.97 V
Texas Instruments LM51561HPWPR	Boost Flyback SEPIC	100 kHz	2.2 MHz	1	14-HTSSOP	Positive	Current Limit Enable Frequency Control Power Good Soft Start	-40 °C	125 °C	1	Surface Mount			Transistor Driver	14-PowerTSSOP	Step-Up Step-Up/Step-Down	93 %	60 V	2.97 V	Automotive	4.4 mm	0.173 in	AEC-Q100

Catalog

2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup

Key Features

• Functional Safety-CapableDocumentation available to aid functional safety system designSuited for wide input operating range battery applications3.5-V to 60-V Operating range (65-V abs max)2.97-V to 16-V when BIAS = VCCMinimum boost supply voltage 1.5 V when BIAS ≥ 3.5 VInput transient protection up to 65 VMinimized battery drainLow shutdown current ( IQ≤ 2.6 µA )Low operating current ( IQ≤ 490 µA )Small solution size and low costMaximum switching frequency of 2.2 MHzIntegrated error amplifier allows primary-side regulation without optocoupler (flyback)EMI mitigationSelectable dual random spread spectrumHigher efficiency with low-power dissipation100-mV ±7% accurate current limit thresholdStrong 1.5-A peak standard MOSFET driverSupports external VCC supplyAvoid AM band interference and crosstalkOptional clock synchronizationDynamically programmable switching frequency from 100 kHz to 2.2 MHzIntegrated protection featuresConstant peak current limiting over input voltageOptional hiccup mode overload protection (see theDevice Comparison Table)Programmable line UVLOOVP protectionThermal shutdownAccurate ±1% accuracy feedback referenceProgrammable extra slope compensationAdjustable soft startPGOOD indicator14-Pin HTSSOP package (5.0 mm × 4.4 mm)Create a custom design using the LM5156xH with theWEBENCH power designerFunctional Safety-CapableDocumentation available to aid functional safety system designSuited for wide input operating range battery applications3.5-V to 60-V Operating range (65-V abs max)2.97-V to 16-V when BIAS = VCCMinimum boost supply voltage 1.5 V when BIAS ≥ 3.5 VInput transient protection up to 65 VMinimized battery drainLow shutdown current ( IQ≤ 2.6 µA )Low operating current ( IQ≤ 490 µA )Small solution size and low costMaximum switching frequency of 2.2 MHzIntegrated error amplifier allows primary-side regulation without optocoupler (flyback)EMI mitigationSelectable dual random spread spectrumHigher efficiency with low-power dissipation100-mV ±7% accurate current limit thresholdStrong 1.5-A peak standard MOSFET driverSupports external VCC supplyAvoid AM band interference and crosstalkOptional clock synchronizationDynamically programmable switching frequency from 100 kHz to 2.2 MHzIntegrated protection featuresConstant peak current limiting over input voltageOptional hiccup mode overload protection (see theDevice Comparison Table)Programmable line UVLOOVP protectionThermal shutdownAccurate ±1% accuracy feedback referenceProgrammable extra slope compensationAdjustable soft startPGOOD indicator14-Pin HTSSOP package (5.0 mm × 4.4 mm)Create a custom design using the LM5156xH with theWEBENCH power designer

Description

The LM5156xH (LM5156H and LM51561H) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V. The LM5156xH (LM5156H and LM51561H) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.