(Hong Kong)
Product Summary
The TPS51125 is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. The TPS51125 provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main efficiency. The TPS51125 supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. The TPS51125 operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125 is available in a 24-pin QFN package.
Parametrics
TPS51125 absolute maximum ratings: (1)Input voltage range, VBST1, VBST2: -0.3 to 36V; VIN: -0.3 to 30V; LL1, LL2: -2.0 to 30V; VBST1, VBST2: -0.3 to 6V; EN0, ENTRIP1, ENTRIP2, VFB1, VFB2, VO1, VO2, TONSEL, SKIPSEL: -0.3 to 6V; (2)Output voltage range, DRVH1, DRVH2: -1.0 to 36V; DRVH1, DRVH2: -0.3 to 6V; PGOOD, VCLK, VREG3, VREG5, VREF, DRVL1, DRVL2: -0.3 to 6V; (3)TJ, Junction temperature range: -40 to 125℃; (4)Tstg, Storage temperature: -55 to 150℃.
Features
TPS51125 features: (1)Wide Input Voltage Range: 5.5 V to 28V; (2)Output Voltage Range: 2 V to 5.5 V; (3)Built-in 100-mA 5-V/3.3-V LDO with Switches; (4)Built-in 1% 2-V Reference Output; (5)With/Without Out-of-Audio Mode Selectable Light Load and PWM only Operation; (6) Internal 1.6-ms Voltage Servo Softstart; (7)Adaptive On-Time Control Architecture with Four Selectable Frequency Setting; (8)4500 ppm/ ℃ R DS(on) Current Sensing; (9)Built-In Output Discharge; (10)Power Good Output; (11)Built-in OVP/UVP/OCP; (12)Thermal Shutdown (Non-latch); (13)QFN24 (RGE).
Diagrams
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 TPS51125 |
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TPS51125AEVM |
Texas Instruments |
Power Management IC Development Tools High Perf Synch Buck Eval Mod |
Data Sheet |
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TPS51125ARGER |
Texas Instruments |
DC/DC Switching Controllers Dual-Synch,Step-Down Controller |
Data Sheet |
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TPS51125ARGET |
Texas Instruments |
DC/DC Switching Controllers Dual-Synch,Step-Down Controller |
Data Sheet |
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TPS51125EVM |
Texas Instruments |
Power Management IC Development Tools TPS51125 Eval Mod |
Data Sheet |
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TPS51125RGER |
Texas Instruments |
DC/DC Switching Controllers Dual-Synch Step- Down Controller |
Data Sheet |
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TPS51125RGERG4 |
Texas Instruments |
DC/DC Switching Controllers Dual-Synch Step- Down Cntrlr |
Data Sheet |
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TPS51125RGET |
Texas Instruments |
DC/DC Switching Controllers Dual-Synch Step- Down Controller |
Data Sheet |
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